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Articles 3451 - 3480 of 6329

Full-Text Articles in Engineering

Capturing The Design Thinking Of Young Children Interacting With A Parent, Brianna L. Dorie, Monica Cardella, Gina Navoa Svarovsky Jan 2014

Capturing The Design Thinking Of Young Children Interacting With A Parent, Brianna L. Dorie, Monica Cardella, Gina Navoa Svarovsky

School of Engineering Education Graduate Student Series

Children have often been labeled as “natural engineers” whose curiosity about the world around them evokes comparisons to skills used by professional engineers and taught to undergraduate engineering students. Building towers out of blocks, taking things apart and figuring how things work are a part of childhood and have been considered to be precursors to engineering thinking.However there has been considerable debate around what engineering looks like for young children. Can young children engage in design and if so, what does that look like? How can we differentiate “design” (especially “modeling” or “create”) activity from normal everyday play?Several design models …

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Concise Handbook For Temporary Traffic Control, Indiana Ltap, Ohio Department Of Transportation Jan 2014

Concise Handbook For Temporary Traffic Control, Indiana Ltap, Ohio Department Of Transportation

Indiana Local Technical Assistance Program (LTAP) Publications

This handbook gives the basic principles and provides examples for the design, application, installation, and maintenance of the various types of traffic control devices used in temporary traffic control or for incident management. The guidelines presented are in accordance with the standards provided within the Indiana Manual for Uniform Traffic Control Devices (IMUTCD). This handbook is based upon one created by the Ohio Department of Transportation, Guidelines for Traffic Control in Work Zones. Indiana LTAP expresses thanks to ODOT for their permission to reprint this material.

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Evaluation Of Structural Properties Of The Freeze–Thaw-Damaged Rc Beam Members By Nonlinear Finite-Element Analysis, Hiroshi Hayashida, Yasuhiko Sato, Tamon Ueda Jan 2014

Evaluation Of Structural Properties Of The Freeze–Thaw-Damaged Rc Beam Members By Nonlinear Finite-Element Analysis, Hiroshi Hayashida, Yasuhiko Sato, Tamon Ueda

International Conference on Durability of Concrete Structures

On RC beam members damaged by freeze–thaw cycles, the authors performed nonlinear finite-element analysis using distributed reinforcement and smeared cracking models, toward evaluating the structural properties of such RC beams. We then compared the analysis results to test results. The comparison found that the accuracy of analysis depends on the severity of concrete deterioration. It was clarified that the test values do not agree with the analysis values for RC beams that experience shear rigidity reduction from freezing damage to the compressive area or for RC beams that experience decreased rebar–concrete bonding strength from freezing damage to the tensile area. …

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Kinetic Modeling Of Evolution Of 3 + 1:Resonance Enhanced Multiphoton Ionization Plasma In Argon At Low Pressures, Siva Sashank Tholeti, Mikhail N. Shneider, Alina A. Alexeenko Jan 2014

Kinetic Modeling Of Evolution Of 3 + 1:Resonance Enhanced Multiphoton Ionization Plasma In Argon At Low Pressures, Siva Sashank Tholeti, Mikhail N. Shneider, Alina A. Alexeenko

School of Aeronautics and Astronautics Faculty Publications

We present numerical kinetic modeling of generation and evolution of the plasma produced as a result of resonance enhanced multiphoton ionization (REMPI) in Argon gas. The particle-in-cell/Monte Carlo collision (PIC/MCC) simulations capture non-equilibrium effects in REMPI plasma expansion by considering the major collisional processes at the microscopic level: elastic scattering, electron impact ionization, ion charge exchange, and recombination and quenching for metastable excited atoms. The conditions in one-dimensional (1D) and two-dimensional (2D) formulations correspond to known experiments in Argon at a pressure of 5 Torr. The 1D PIC/MCC calculations are compared with the published results of local drift-diffusion model, obtained …

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Experimental Measurements And Modeling Of Convective Heat Transfer In The Transitional Rarefied Regime, Andrew D. Strongrich, Alina A. Alexeenko Jan 2014

Experimental Measurements And Modeling Of Convective Heat Transfer In The Transitional Rarefied Regime, Andrew D. Strongrich, Alina A. Alexeenko

School of Aeronautics and Astronautics Faculty Publications

We present experimental measurements and numerical simulations of convective heat transferperformance in the transitional rarefied regime for an isolated rectangular beam geometry. Experiments were performed using single crystalline silicon beam elements having width-to-thickness aspect ratios of 8.5 and 17.4. Devices were enclosed in a vacuum chamber and heated resistively using a DC power supply. A range of pressures corresponding to Knudsen numbers between 0.096 and 43.2 in terms of device thickness were swept, adjusting applied power to maintain a constant temperature of 50 K above the ambient temperature. Both parasiticelectrical resistance associated with the hardware and radiative exchange with the …

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Amplification And Reversal Of Knudsen Force By Thermoelectric Heating, William J. O'Neill, Mizuki Wada, Andrew D. Strongrich, Anthony Cofer, Alina A. Alexeenko Jan 2014

Amplification And Reversal Of Knudsen Force By Thermoelectric Heating, William J. O'Neill, Mizuki Wada, Andrew D. Strongrich, Anthony Cofer, Alina A. Alexeenko

School of Aeronautics and Astronautics Faculty Publications

We show that the Knudsen thermal force generated by a thermally-induced flow over a heated beam near a colder wall could be amplified significantly by thermoelectric heating. Bidirectional actuation is achieved by switching the polarity of the thermoelectric device bias voltage. The measurements of the resulting thermal forces at different rarefaction regimes, realized by changing geometry and gas pressure, are done using torsional microbalance. The repulsive or attractive forces between a thermoelectrically heated or cooled plate and a substrate are shown to be up to an order of magnitude larger than for previously studied configurations and heating methods due to …

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Structured Pairing In A First-Year Electrical And Computer Engineering Laboratory: The Effects On Student Retention, Attitudes, And Teamwork, Nicholas D. Fila, Michael C. Loui Jan 2014

Structured Pairing In A First-Year Electrical And Computer Engineering Laboratory: The Effects On Student Retention, Attitudes, And Teamwork, Nicholas D. Fila, Michael C. Loui

School of Engineering Education Graduate Student Series

This paper describes a simple technique, structured pairing, for organizing student teams in engineering instructional laboratories. This technique was adapted from pair programming, which was previously found to improve student confidence, satisfaction, and retention in computer science. A study of structured pairing was implemented in a large required course for first-year students in electrical and computer engineering. Six laboratory sections implemented structured pairing, and the other seven laboratory sections operated in a traditional way (i.e., unstructured team interactions). Data were collected from a student survey, two focus groups, and course enrollment records. Structured pairing students reported significantly higher confidence in …

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Research On Microscopic Pore Structure And Permeability Of Air-Entrained Fly–Ash Concrete Subjected To Freezing And Thawing Action, Zhuo Zhao, Dawang Li, Feng Xing, Ningxu Han, Dongwei Wang Jan 2014

Research On Microscopic Pore Structure And Permeability Of Air-Entrained Fly–Ash Concrete Subjected To Freezing And Thawing Action, Zhuo Zhao, Dawang Li, Feng Xing, Ningxu Han, Dongwei Wang

International Conference on Durability of Concrete Structures

In this paper, rapid freezing and thawing test of air-entrained fly–ash concrete was carried out. Gas adsorption of concrete pores, mass loss, dynamic elastic modulus, and chloride diffusion coefficient of concrete after different freezing and thawing cycles was tested; scanning electron image was used to study the microscopic pore structure of the specimens. Results show that after certain freezing and thawing cycles, microscopic pores of the sample had a brittle failure, which results in sudden changes of cumulative desorption pore volume and cumulative desorption surface area obtained by Barrett, Joyner, and Halenda method. It was found that the variation of …

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Using Acoustic Emission To Quantify Freeze–Thaw Damage Of Mortar Saturated With Nacl Solutions, Ye Qian, Yaghoob Farnam, Jason Weiss Jan 2014

Using Acoustic Emission To Quantify Freeze–Thaw Damage Of Mortar Saturated With Nacl Solutions, Ye Qian, Yaghoob Farnam, Jason Weiss

International Conference on Durability of Concrete Structures

Mortar samples were saturated with NaCl solutions of various concentrations and subjected to freeze– thaw cycles. Passive and active acoustic emission (AE) testing was conducted. The freezing temperature of the NaCl solutions in mortar corresponded with the sudden observation of passive AE events. The acoustic energy and damage parameter were calculated to evaluate the extent of freeze–thaw damage. The influence of the NaCl solution concentration and whether the solution freezes on freeze–thaw damage are discussed.

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Physical Model And Mesoscale Simulation Of Mortar And Concrete Deformations Under Freeze–Thaw Cycles, Fuyuan Gong, Evdon Sicat, Yi Wang, Tamon Ueda, Dawei Zhang Jan 2014

Physical Model And Mesoscale Simulation Of Mortar And Concrete Deformations Under Freeze–Thaw Cycles, Fuyuan Gong, Evdon Sicat, Yi Wang, Tamon Ueda, Dawei Zhang

International Conference on Durability of Concrete Structures

The degradation of concrete material under multiple freeze–thaw cycles is an important issue for structures in cold and wet regions. This paper proposed a physical and mechanical model to explain the deformation behavior observed in previous experiments, from internal pressure calculation to mesoscale simulation, and for both closed and open freeze–thaw tests. Three kinds of internal pressures are considered in this study: hydraulic pressure due to ice volume expansion, crystallization pressure, and cryosuction pressure due to liquid–ice interface. The hydraulic pressure model combines Power’s model with poromechanical theories, which can well explain the reverse phenomenon (from expansion to contraction) observed …

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A Compact Theory Of Magnetic Nerve Stimulation: Predicting How To Aim, Charles F. Babbs Jan 2014

A Compact Theory Of Magnetic Nerve Stimulation: Predicting How To Aim, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Publications

Background: A compact theory that predicts quantitatively when and where magnetic neurostimulation will occur is needed as a guide to therapy, ideally providing a single equation that defines the target volume of tissue excited by single or dual coils. Methods: A first-principles analysis of magnetic stimulation incorporating a simplified description of electromagnetic fields and a simplified cable theory of the axon yields a mathematical synthesis predicting how to aim. Results: Nerve stimulation produced by a single circular coil having one or more closely packed turns occurs in donut shaped volume of tissue beneath the coil. Axons spanning several millimeters are …

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Performance-Limiting Factors For Gaas-Based Single Nanowire Photovoltaics, Xufeng Wang, Mohammad Ryyan Khan, Mark Lundstrom, Peter Bermel Jan 2014

Performance-Limiting Factors For Gaas-Based Single Nanowire Photovoltaics, Xufeng Wang, Mohammad Ryyan Khan, Mark Lundstrom, Peter Bermel

Department of Electrical and Computer Engineering Faculty Publications

GaAs nanowires (NWs) offer the possibility of decoupling light absorption from charge transport for high-performance photovoltaic (PV) devices. However, it is still an open question as to whether these devices can exceed the Shockley-Queisser efficiency limit for single-junction PV. In this work, single standing GaAs-based nanowire solar cells in both radial and vertical junction configurations is analyzed and compared to a planar thin-film design. By using a self-consistent, electrical-optically coupled 3D simulator, we show the design principles for nanowire and planar solar cells are significantly different; nanowire solar cells are vulnerable to surface and contact recombination, while planar solar cells …

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Noninvasive Measurement Of Cardiac Stroke Volume Using Pulse Wave Velocity And Aortic Dimensions: A Simulation Study, Charles F. Babbs Jan 2014

Noninvasive Measurement Of Cardiac Stroke Volume Using Pulse Wave Velocity And Aortic Dimensions: A Simulation Study, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Publications

Background: Concerns about the cost-effectiveness of invasive hemodynamic monitoring in critically ill patients using pulmonary artery catheters motivate a renewed search for effective noninvasive methods to measure stroke volume. This paper explores a new approach based on noninvasively measured pulse wave velocity, pulse contour, and ultrasonically determined aortic cross sectional area. Methods: The Bramwell-Hill equation relating pulse wave velocity to aortic compliance is applied. At the time point on the noninvasively measured pulse contour, denoted th, when pulse amplitude has fallen midway between systolic and diastolic values, the portion of stroke volume remaining in the aorta, and in turn the …

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Choosing Inclusion Criteria That Minimize The Time And Cost Of Clinical Trials, Charles F. Babbs Jan 2014

Choosing Inclusion Criteria That Minimize The Time And Cost Of Clinical Trials, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Publications

AIM: To present statistical tools to model and optimize the cost of a randomized clinical trial as a function of the stringency of patient inclusion criteria. METHODS: We consider a two treatment, dichotomous outcome trial that includes a proportion of patients who are strong responders to the tested intervention. Patients are screened for inclusion using an arbitrary number of test results that are combined into an aggregate suitability score. The screening score is regarded as a diagnostic test for the responsive phenotype, having a specific cutoff value for inclusion and a particular sensitivity and specificity. The cutoff is a measure …

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Engineering And Engineering Education As Spiritual Vocations, Julia D Thompson, Mel Chua, Cole H. Joslyn Jan 2014

Engineering And Engineering Education As Spiritual Vocations, Julia D Thompson, Mel Chua, Cole H. Joslyn

School of Engineering Education Graduate Student Series

Spirituality and engineering (education) are often kept in separate compartments in our lives. They may slip out occasionally for conversations during ethics classes or service learning projects, but speaking -- and living -- our spiritual/religious values as engineers and engineering educators/researchers is still uneasy territory for many. The spirit of free inquiry and reflection that permeates the liberal arts urges us to integrate our spirituality into the human and natural worlds we inhabit. How do we bring such thinking into the technical realms?In this session, we will describe our personal journeys toward engineering education and how we actively and reflectively …

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Effect Of Molecular Models On Viscosity And Thermal Conductivity Calculations, Andrew B. Weaver, Alina A. Alexeenko Jan 2014

Effect Of Molecular Models On Viscosity And Thermal Conductivity Calculations, Andrew B. Weaver, Alina A. Alexeenko

School of Aeronautics and Astronautics Faculty Publications

The effect of molecular models on viscosity and thermal conductivity calculations is investigated. The Direct Simulation Monte Carlo (DSMC) method for rarefied gas flows is used to simulateCouette and Fourier flows as a means of obtaining the transport coefficients. Experimentalmeasurements for argon (Ar) provide a baseline for comparison over a wide temperature range of 100–1,500 K. The variable hard sphere (VHS), variable soft sphere (VSS), and Lennard-Jones (L-J) molecular models have been implemented into a parallel version of Bird’s one-dimensional DSMC code, DSMC1, and the model parameters have been recalibrated to the current experimental data set. While the VHS and …

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A Tale Of Two Design Contexts: Quantitative And Qualitative Explorations Of Student-Instructor Interactions Amidst Ambiguity, Monica E. Cardella, Patrice Buzzanell, Antonette Cummings, Delean Tolbert, Carla B. Zoltowski Jan 2014

A Tale Of Two Design Contexts: Quantitative And Qualitative Explorations Of Student-Instructor Interactions Amidst Ambiguity, Monica E. Cardella, Patrice Buzzanell, Antonette Cummings, Delean Tolbert, Carla B. Zoltowski

Design Thinking Research Symposium

Designers develop design skills and knowledge through experience and feedback – feedback from colleagues, clients, supervisors, users, stakeholders, the success or failure of a solution, and design educators. In this project, we focus on the feedback provided to mechanical engineering students completing their undergraduate studies and industrial design graduate students during design reviews. The design coaches (educators and industry clients) and design students must negotiate ambiguity in the process. The students must reduce ambiguity in the sense of providing clear details as they communicate their design work, reduce ambiguity in the coaches’ perceptions of the design work quality by providing …

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Polysemy In Design Review Conversations, Georgi V. Georgiev, Toshiharu Taura Jan 2014

Polysemy In Design Review Conversations, Georgi V. Georgiev, Toshiharu Taura

Design Thinking Research Symposium

This paper examines the role of polysemy, defined as the quality of having multiple meanings, in design review conversations. It examines the polysemy, particularly of nouns, involved in a dataset of design review conversations with reference to design ideas. The purpose is to determine whether polysemy is related to successful development of design ideas and more creative design outcomes. The results show that the polysemy of nouns involved in the conversations of the finally developed, successful, design ideas exceeds in the most cases the average polysemy involved in the conversations pertaining to the unsuccessful design ideas. Furthermore, the polysemy of …

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A Performance-Based Framework For Structural Resilience To Blast-Induced Damage, Shalva Marjanishvili, Spencer Quiel, Brian Katz Jan 2014

A Performance-Based Framework For Structural Resilience To Blast-Induced Damage, Shalva Marjanishvili, Spencer Quiel, Brian Katz

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

This paper proposes a framework for establishing quantitative measures and mathematically reproducible definitions of structural resiliency as it pertains to a structure's ability to minimize the potential for undesirable response to low-probability-high-consequence events. The resiliency assessment and design process follow a logical progression of steps starting with the characterization of hazards and continuing through analysis simulations, damage modeling, and loss assessment by balancing functional relationships between design tradeoffs and associated consequences. The outcomes of each subprocess are articulated through a series of generalized variables: topology, geometry, damage, and hazard intensity measures. A rigorous probabilistic framework permits consistent characterization of the …

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A Study On Performance Design Using A Sprinkler System For Fire-Spread Prevention Of A Building Exterior, Seung Un Chae, Heung-You Kim, Uh-Sang Kwon, Bum-Yean Cho Jan 2014

A Study On Performance Design Using A Sprinkler System For Fire-Spread Prevention Of A Building Exterior, Seung Un Chae, Heung-You Kim, Uh-Sang Kwon, Bum-Yean Cho

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

A glass exterior material is normally used in buildings, but it also comes with a disadvantage—it is easily damaged by fire. If the glass exterior material is damaged, a fire can rapidly propagate inside the building space, leading to a lot of damage from the flame transfer to the other space. In this study, the performance of a sprinkler for flame propagation prevention was evaluated during an experiment with an actual proof fire. The study found that where the sprinkler is installed with the glass exterior material, the temperature does not exceed 60°C until the end of the test due …

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A Multi-Criteria Methodology For Measuring The Resilience Of Transportation Assets And Prioritizing Security Investments, Michelle S. Dojutrek, Samuel Labi, J Eric Dietz Jan 2014

A Multi-Criteria Methodology For Measuring The Resilience Of Transportation Assets And Prioritizing Security Investments, Michelle S. Dojutrek, Samuel Labi, J Eric Dietz

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

Transportation project prioritization uses performance measures that are related to the transportation asset, its operations, and its environment. However, in the state of practice, evaluation does not consider directly the likelihood of natural or man-made threats, the infrastructure resilience, or the consequences of the infrastructure damage in the event that the threat occurs. Thus, during the prioritization of investments, assets of low security do not receive the due attention they deserve. In defining security as the lack of risk of damage from threats due to inherent structure or functional resilience, this paper is based on the premise that the inclusion …

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Development Of Resilience Index In Transport Systems, Seungjae Lee, Jooyoung Kim, Shinhae Lee, Yan Chang-Richards Jan 2014

Development Of Resilience Index In Transport Systems, Seungjae Lee, Jooyoung Kim, Shinhae Lee, Yan Chang-Richards

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

This paper demonstrates the quantification of the resilience index (RI) in transport systems. The transport infrastructure can be managed by using the concepts of resilience. Vugrin, Warren, Ehlen, & Camphouse (2010) emphasized the enhancement of resilience in infrastructure before disasters and the establishment of efficient measures for the recovery of systems in an emergency. The concept of resilience has a significant influence on transport planning and operations for disaster preparation. Lee, Kim, & Lee (2013) investigated the concepts of resilience and examined case studies using valuable asset-management techniques in order to maintain the resilience concepts which should be introduced in …

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Flood Risk Management: An Illustrative Approach, Natainia S. Lummen, Y Nagayoshi, H Shirozu, T Hokamura, S Nakajo, F Yamada, N Okada Jan 2014

Flood Risk Management: An Illustrative Approach, Natainia S. Lummen, Y Nagayoshi, H Shirozu, T Hokamura, S Nakajo, F Yamada, N Okada

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

Widespread flooding with significant damage in many countries, such as the Philippines in 2013, highlights the ongoing need for effective flood risk management (FRM). This hinges on comprehensive access to and dissemination of information about the elements and the people at risk. Simulations, real-time graphs, and maps illustrate the spatial distribution of flood risks, spatial allocation and dissemination of flood effects, if flood risk reduction measures are not implemented, as well as the benefits to be derived from the effective implementation and maintenance of flood risk management measures not realized. Using precipitation, river water, and tide levels, a real-time monitoring …

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Simulation Of Bedrock Motion To Obtain Pga Values, Shyanaka Dananjaya, Ranjith Dissanayake, Nimal Senevirathne, Kushan K. Wijesundara Jan 2014

Simulation Of Bedrock Motion To Obtain Pga Values, Shyanaka Dananjaya, Ranjith Dissanayake, Nimal Senevirathne, Kushan K. Wijesundara

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

This study is focused on producing the Peak Ground Acceleration (PGA) values for important cities in Sri Lanka, which would provide the base to develop the national annex to the Euro Code, the current guideline in designing structures. In order to find out the magnitude and the epicenter distance of a 475-year return period earthquake, an earthquake catalog was developed. To simulate the bedrock motion FLAC Software, which uses the Finite Difference approach, was used. Five 2-D FLAC models representing five cross sections of Sri Lanka were developed. Due to the lack of local data records, a dataset of seven …

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Experimental Study On The Fire Resistance Performance Of Prestressed Composite Beam With Corrugated Web Under Standard Fire With Loading Condition, Heung-Youl Kim, Hyung-Jun Kim, Kyung-Hoon Park, Bum-Yean Cho Jan 2014

Experimental Study On The Fire Resistance Performance Of Prestressed Composite Beam With Corrugated Web Under Standard Fire With Loading Condition, Heung-Youl Kim, Hyung-Jun Kim, Kyung-Hoon Park, Bum-Yean Cho

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

In this study, fire resistance tests were performed on a conventional slim floor beam and a prestressed composite beam with corrugated webs, which is suitable for a long-span structure with a reduction in story height by utilizing the prestress and accordion effect. In the fire test program, the ISO 834 standard fire curve was adopted. Key test variables were the effect of prestress, shape of corrugated webs, and thickness of sprayed fireproofing material. All of the test specimens demonstrated enhanced fire resistance performance exceeding the expected performance level. The prestressed composite beams with corrugated webs especially showed excellent fire performance, …

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Housing The Workforce Following The Canterbury Earthquakes In New Zealand, Yan Chang-Richards, Suzanne J. Wilkinson, Erica Seville, David Brundson Jan 2014

Housing The Workforce Following The Canterbury Earthquakes In New Zealand, Yan Chang-Richards, Suzanne J. Wilkinson, Erica Seville, David Brundson

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

Temporary housing following a large-scale disaster has a positive effect on household welfare and community recovery. Following the 2010 and 2011 Canterbury earthquakes, a shortage of temporary accommodation created barriers for the outside construction workforce to engage in repairs and rebuild in Christchurch. This study investigates the impacts of housing shortages for the overall recovery and the strategies adopted by both households and the workforce in the building industry. Findings suggest that the interplay among the industry strategies and household strategies for securing housing determines the magnitude and scope of economy-wide inflation. One unfortunate consequence of these industry strategies is …

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The Study On Fire Safety By A Real-Scale Combustion Experiment Of Composite Material, Oh-Sang Kweon, Heung-Youl Kim, Seung-Un Chae, Bum-Yean Cho Jan 2014

The Study On Fire Safety By A Real-Scale Combustion Experiment Of Composite Material, Oh-Sang Kweon, Heung-Youl Kim, Seung-Un Chae, Bum-Yean Cho

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

In this study, a real-scale combustion experiment was carried out for a Styrofoam and glass wool sandwich panel to figure out the fire safety for the composite material used for a building. In the experiment, a heat release rate of a sandwich panel was measured by the ISO 9705 fire test method. Research has also tested and compared temperature change in the Large Scale Calorimeter (LSC) experiment equipment to evaluate the structural safety of the structure body. As a result of the experiment, the structural body with the Styrofoam sandwich panel collapsed which was caused by propagation, and in case …

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Experimental Study On Fire Resistance Performance Of A Hollow Slab Using A Lightweight Hollow Sphere, Bum-Yean Cho, Hyung-Jun Kim, Kyung-Hoon Park, Heung-Youl Kim Jan 2014

Experimental Study On Fire Resistance Performance Of A Hollow Slab Using A Lightweight Hollow Sphere, Bum-Yean Cho, Hyung-Jun Kim, Kyung-Hoon Park, Heung-Youl Kim

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

This study evaluates the fire resistance performance (1–2h) of a reinforced concrete (RC) structure-void slab using a lightweight hollow sphere, which can reduce the unnecessary dynamic of removing the central concrete. For this experiment, we set up the depth of the concrete cover, live load, and span length as the factors. The result comes out with 50 mm cover depth of the RC structure hollow slab secured. It was shown that 120 minutes of fire resistance performance can be secured regardless of the length of the structure and loading. Among these factors, the resisting capability changes more sensitively with the …

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Motive And Conflict In The Disaster Recovery Process Of Housing Reconstruction In Sri Lanka After The 2004 Indian Ocean Tsunami, Chang Yeol Choi, Riki Honda Jan 2014

Motive And Conflict In The Disaster Recovery Process Of Housing Reconstruction In Sri Lanka After The 2004 Indian Ocean Tsunami, Chang Yeol Choi, Riki Honda

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

Normative solutions for the successful recovery from large-scale disasters have been presented by various researches, but implementation requires a long process, and mechanism for the process to continue is necessary. We consider the consistency among strategies of stakeholders such as government and NGOs. These players make a decision based on not only direct motive but various complex motives and interaction with other players. This paper considers interactive decision-making as a game among stakeholders. As a case to study, we analyze housing reconstruction project in Sri Lanka after the 2004 Indian Ocean Tsunami. There was relatively abundant financial support, but the …

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Data Preparation For Validation Study Of Hazus Canada Flood Model, Heather Mcgrath, Emmanual Stefanakis, M Mccarthy, Miroslav Nastev Jan 2014

Data Preparation For Validation Study Of Hazus Canada Flood Model, Heather Mcgrath, Emmanual Stefanakis, M Mccarthy, Miroslav Nastev

International Institute for Infrastructure Resilience and Reconstruction (I3R2) Conference

As our climate changes, the occurrence of extreme weather events and heavier rainfall becomes more common. This change in weather patterns and precipitation results in a greater number of recorded flood events and a larger magnitude of flood events. Canadian municipalities are therefore facing a pressing demand to perform hazard assessments to identify communities at risk and measure potential economic and societal losses due to flood events. Federal Emergency Management Agency (FEMA) developed a standardized tool, Hazus-MH, for loss estimation from natural disasters for use in the US. Recently, Hazus has been adapted for use in Canada. This paper introduces …

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