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Articles 2131 - 2160 of 4479

Full-Text Articles in Construction Engineering and Management

Multihazard Hurricane Fragility Model For Wood Structure Homes Considering Hazard Parameters And Building Attributes Interaction, Carol C. Massarra, Carol J. Friedland, Brian D. Marx, J. Casey Dietrich Sep 2020

Multihazard Hurricane Fragility Model For Wood Structure Homes Considering Hazard Parameters And Building Attributes Interaction, Carol C. Massarra, Carol J. Friedland, Brian D. Marx, J. Casey Dietrich

Faculty Publications

Predicting building damage as a function of hurricane hazards, building attributes, and the interaction between hazard and building attributes is a key to understanding how significant interaction reflects variation hazard intensity effect on damage based on building attribute levels. This paper develops multihazard hurricane fragility models for wood structure homes considering interaction between hazard and building attributes. Fragility models are developed for ordered categorical damage states (DS) and binary collapse/no collapse. Exterior physical damage and building attributes from rapid assessment in coastal Mississippi following Hurricane Katrina (2005), high-resolution numerical hindcast hazard intensities from the Simulating WAves Nearshore and ADvanced CIRCulation …

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Lessons Learned From Six Different Structural Health Monitoring Systems On Highway Bridges, Abheetha Peiris, Charlie Sun, Issam E. Harik Sep 2020

Lessons Learned From Six Different Structural Health Monitoring Systems On Highway Bridges, Abheetha Peiris, Charlie Sun, Issam E. Harik

Kentucky Transportation Center Faculty and Researcher Publications

Structural health monitoring has been utilized in numerous ways to investigate the performance and integrity of highway bridges. This paper highlights the use of six structural health monitoring systems, which were deployed to monitor distinct behaviors on six bridges in Kentucky. The structural health monitoring systems are as follows: (1) Over-height truck impact detection and monitoring on the I-64 over US 60 bridge, (2) Barge impact detection and monitoring on northbound US 41 over the Ohio River, (3) effectiveness of carbon fiber-reinforced polymer retrofit evaluation based on prestressed concrete I-girder crack movement on the I-65 elevated expressway in Louisville, (4) …

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Identifying Challenges To Project Outcomes From A Transportation Project Owner Perspective, Evan D. Bingham, Clifton B. Farnsworth, Rebecca O. Warr, James P. Smith Sep 2020

Identifying Challenges To Project Outcomes From A Transportation Project Owner Perspective, Evan D. Bingham, Clifton B. Farnsworth, Rebecca O. Warr, James P. Smith

The Professional Constructor

Transportation project owners are often concerned with the risks associated with construction, because these challenges can directly affect project outcomes and often lead to increased time and cost for projects. It is, therefore, vital to identify challenges early within the project life cycle. Transportation project delivery has evolved to strengthen the influence that the owner has upon the project, transitioning away from the exclusive use of traditional Design-Bid-Build to the more innovative and involved approaches of Design-Build and Construction Manager / General Contractor. Unfortunately, this has resulted in increased owner risk. In this research, transportation project owners were asked to …

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A Culture-Based Analysis Of Construction Management Students’ Conflict Management Styles, David W. Martin Sep 2020

A Culture-Based Analysis Of Construction Management Students’ Conflict Management Styles, David W. Martin

The Professional Constructor

The use of collaborative project delivery systems in the construction industry requires cooperation and shared management of the construction process to achieve success. This growth in collaborative systems requires project representatives to effectively manage conflict. Project failures utilizing collaborative methods are frequently attributed to an inability of project representatives to collaboratively resolve conflict. Research suggests that minorities are prone to use a collaborative conflict management style and the inclusion of minorities in construction management (CM) roles can reduce negative conflict. The growing evidence that increasing workforce diversity in CM is beneficial to the industry indicates that there is value in …

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Role Of Infrastructure In The Success Of Residential Developments In Michigan, Aditi Hardekar, M.G. Matt Syal Sep 2020

Role Of Infrastructure In The Success Of Residential Developments In Michigan, Aditi Hardekar, M.G. Matt Syal

The Professional Constructor

Infrastructure systems are critical for the success of a residential development. These systems include the infrastructure within and around the development as well as facilities and amenities in the surrounding area. Most of the residential development literature tend to focus on the planning, layout, social aspects, and the residential units itself, but lack emphasis on the infrastructure systems. This paper identified supporting infrastructure for residential developments based on the review of research and industry literature, and several case studies nationwide. The availability and absence of infrastructure systems were investigated in each case study. The review led to the identification of …

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Change Management In Construction: Necessity, Obstacles,And Suggested Solutions, Ihab M. H. Saad Sep 2020

Change Management In Construction: Necessity, Obstacles,And Suggested Solutions, Ihab M. H. Saad

The Professional Constructor

The construction industry is one of the major harbingers of the economy of any industrialized nation. Its contribution to the Gross Domestic Product is undeniable. The major economic downturn that lasted from 2008 to 2011 resulted in a lot of change in the industry personnel at both the administration and labor force levels. This resulted in expediting the retirement of a generation of seasoned professionals, and creating a gap in the ranks of construction firms that is still to be completely filled. Similar impacts followed the uncertainty resulting recently from Covid-19 and the economic instability and uncertainty it caused. One …

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Pert, Cpm And The Tangled History Of Network Scheduling, Charles Christopher Smith, Vivek Sharma, Gregory B. Baecher Sep 2020

Pert, Cpm And The Tangled History Of Network Scheduling, Charles Christopher Smith, Vivek Sharma, Gregory B. Baecher

The Professional Constructor

The origins of two network scheduling techniques: The Program Evaluation Review Technique (PERT); and the Critical Path Method (CPM) are examined. Prior accounts hold that each are different and were created separately. PERT, developed within the U. S. Navy’s highly classified POLARIS nuclear missile program which began in 1955. CPM, the creation of American industrial concerns E. I. du Pont de Nemours (du Pont) and Remington Rand UNIVAC. With the objective of settling “an acrimonious dispute over parentage,” this research examines the literature and the original forms of PERT and CPM noting their ‘dead ring’ resemblances, synchronous development timelines, while …

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How Mandatory Stretches Increase Safety In The Workplace, Alec Pitts Sep 2020

How Mandatory Stretches Increase Safety In The Workplace, Alec Pitts

Construction Management

The construction industry is one that revolves around safety. Without safety this industry fails. Jobsite safety keeps companies afloat longer whether it's financially, physically, or even mentally. This senior project dives into the benefits of mandatory stretching prior to each work day. This study also questions contractors and tests the stretches and their results. These benefits include muscle warm ups, increase of focus, added flexibility, increased range of motion, and even mental awareness. The idea of these morning stretches means more upfront costs for less costs later down the road. These stretches are an extra form of insurance when completed …

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Bridge Infrastructure Asset Management System: Comparative Computational Machine Learning Approach For Evaluating And Predicting Deck Deterioration Conditions, Rayan Assaad, Islam H. El-Adaway Sep 2020

Bridge Infrastructure Asset Management System: Comparative Computational Machine Learning Approach For Evaluating And Predicting Deck Deterioration Conditions, Rayan Assaad, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Bridge infrastructure asset management system is a prevailing approach toward having an effective and efficient procedure for monitoring bridges through their different development phases including construction, operation, and maintenance. Damage to any structural component of a bridge will negatively affect its safety, integrity, and longevity. Bridge decks are more susceptible to severe deterioration because they are exposed to harsh conditions including heavy traffic, varying temperatures, road salts, and abrasive forces. The ability to forecast the conditions of bridges in an accurate way has been a great challenge to transportation agencies. Many previous research studies highlighted the need to have a …

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Bs News September/October Sep 2020

Bs News September/October

Building Services Engineering

No abstract provided.

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Hybrid Passive Control System For Seismic Response Mitigation Of Steel Frame Structures, Mohammad Hossein Mehrabi Sep 2020

Hybrid Passive Control System For Seismic Response Mitigation Of Steel Frame Structures, Mohammad Hossein Mehrabi

Student Works (2020-2029)

Large vibration forces such as from seismic excitations can cause structural damage and structural collapse in the case of intense earthquakes. A large number of novel methods and of these techniques has weaknesses and strengths. Several control devices demonstrate a two-step mechanism in which the structure's stiffness is initially raised, and then the of the first vibration period down to a region where the structural response is significantly increased. The main aim of this thesis is to propose a hybrid passive control system comprises of two phases for the seismic retrofit of moment-resisting steel frames. The first phase is a …

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St. Mary And St. Anne Cathedral, Cork: An Optimum Heating Solution For Heritage Buildings?, Christopher Shiell, Roger P. West Aug 2020

St. Mary And St. Anne Cathedral, Cork: An Optimum Heating Solution For Heritage Buildings?, Christopher Shiell, Roger P. West

Civil Engineering Research in Ireland 2020

Cathedrals and most churches are characterised by having large internal, undivided spaces and permeable building envelopes. They are often used little, intermittently, but predictably and, in spite of the fact that they are unique in still being largely used for the purpose for which they were built many centuries ago, they are now often used for additional purposes, for which they were never designed. These uses include concerts, graduation ceremonies, filming and a host of other uses all of which require a level of thermal comfort not envisaged by the original builders. Research was undertaken by the authors into the …

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Challenges And Opportunities To Deep Retrofitting Of Traditional Fabric Buildings To Achieve Nearly Zero Energy Building (Nzeb), Maria Lopez Zambrano, Paul Kenny, Jamie Goggins Aug 2020

Challenges And Opportunities To Deep Retrofitting Of Traditional Fabric Buildings To Achieve Nearly Zero Energy Building (Nzeb), Maria Lopez Zambrano, Paul Kenny, Jamie Goggins

Civil Engineering Research in Ireland 2020

Many of our traditional buildings are disappearing or in danger of being under utilised because they are not comfortable for modern day living and do not meet our present day needs. If a building does not have a use, inevitably it deteriorates and eventually becomes a ruin or gets demolished. It is important to retrofit these buildings, which are part of our identity and can be powerful tourist attractions even though most of them are not listed. Some owners want to apply for retrofitting schemes and grants, but they are rejected because there are no standard solutions to achieve low …

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Teaching Of Structural Analysis Into The Future, Dermot O'Dwyer Aug 2020

Teaching Of Structural Analysis Into The Future, Dermot O'Dwyer

Civil Engineering Research in Ireland 2020

The engineering curriculum has always been full. In the past civil and structural engineers studied a wide variety of technical subjects within the broad field of engineering science and spent many hours working on design projects. Modern engineering curricula try to cover these areas while also dedicating more time to structured group-work, report writing and communication skills. Although students spend longer in college the number and range of technical fields that students must master is considerably larger than in the past. As a result the time available to any one topic area has reduced. At the same time the work …

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Can Deap Help Us To Predict The Energy Demand And Indoor Temperature Of Homes Before And After Renovation? A Case Study From Dublin, Paul Moran, Jamie Goggins Aug 2020

Can Deap Help Us To Predict The Energy Demand And Indoor Temperature Of Homes Before And After Renovation? A Case Study From Dublin, Paul Moran, Jamie Goggins

Civil Engineering Research in Ireland 2020

Improving the energy efficiency of buildings via retrofitting is seen as one of the key mitigation measures to reducing the energy demand and carbon emissions of the built environment in Ireland. However, while energy efficiency retrofits for buildings are effective in theory, the energy savings estimated by statistical or engineering models can often be inaccurate. The Domestic Energy Assessment Procedure (DEAP) is the standard assessment procedure used for assessing the energy performance standard of residential buildings in Ireland. This paper examines the gas energy demand for space and water heating and the internal temperature profiles in contrast to DEAP estimates …

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Operational And Embodied Energy Analysis Of 8 Single-Occupant Dwellings Retrofit To Nzeb Standard, Richard O'Hegarty, Shane Colclough, Oliver Kinnane, Donal Lennon, Etienne Rieux Aug 2020

Operational And Embodied Energy Analysis Of 8 Single-Occupant Dwellings Retrofit To Nzeb Standard, Richard O'Hegarty, Shane Colclough, Oliver Kinnane, Donal Lennon, Etienne Rieux

Civil Engineering Research in Ireland 2020

In line with the Energy Performance of Buildings Directive, Irish dwellings are being retrofit to near Zero Energy Building (nZEB) standards - with a number of the deep energy retrofits classified as A-rated. As a result of the low operational energy, the embodied energy share of an nZEB's life cycle energy is significantly increased. Therefore, to obtain a holistic picture of the change in energy profile of buildings, the embodied energy of the material added to achieve that low performance should also be taken into account. This paper presents results from a case study of 8 single-occupant terrace bungalows retrofit …

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Art In Engineering: Evoking A Creative Response From Engineering Students And More, Jamie Goggins, Marta Fuente, Eamonn Madden Aug 2020

Art In Engineering: Evoking A Creative Response From Engineering Students And More, Jamie Goggins, Marta Fuente, Eamonn Madden

Civil Engineering Research in Ireland 2020

The concept of creativity being only associated with writers, painters, and artistic professions is outdated. The future engineer must embrace maths, art and creativity to unlock innovative solutions. Traditional engineering courses with an emphasis predominately on maths and science can produce graduates who are constrained in developing design solutions without creativity to unlock innovative solutions. This paper describes a short course introduced in the School of Engineering at NUIGalway in 2018 to expose students to creative thinking research and principles and engage in various forms of creative expression (photography, painting and essay writing) to articulate their response to a set …

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The Broader Development Of The Student Engineer Through Industry Based Experiential Learning, Donogh Coleman, Ted Mckenna, Mary Moloney Aug 2020

The Broader Development Of The Student Engineer Through Industry Based Experiential Learning, Donogh Coleman, Ted Mckenna, Mary Moloney

Civil Engineering Research in Ireland 2020

The global drive for industry-aware and industry-ready engineering graduates, has led to the development and integration of experiential learning through work placements. Industry is looking to recruit graduates with not just the requisite technical engineering skills, but also graduates with inter alia high levels of teamwork and communications skills. This has been recognised by CIT with the integration of work placement in most of its undergraduate programmes. This paper provides an overview of the student placement process in the Department of Civil, Structural and Environmental Engineering at CIT, includes the work placement alternative which was implemented due to the COVID-19 …

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Long-Run Traffic Simulations For Multi-Lane Road Bridges, Róisín Donnelly, Lorcan Connolly, Ilaria Bernardini Aug 2020

Long-Run Traffic Simulations For Multi-Lane Road Bridges, Róisín Donnelly, Lorcan Connolly, Ilaria Bernardini

Civil Engineering Research in Ireland 2020

The maintenance and repair of ageing bridges is a concern for road infrastructure managers. This issue is amplified by the increasing weights and frequency of travel of freight vehicles in recent times. In order to accurately assess the risk of damage for road bridges, it is essential to have knowledge of both historical and current bridge loading. When available, site-specific Weigh-in-Motion (WIM) data can be effective in creating representative load models for a structure. However, for cases where WIM data is not available and in cases where future damage must be predicted, it is necessary to simulate appropriate data using …

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Repair & Rehabilitation Of Daly's (Shakey) Bridge, Cork City, Michael Minehane, John Gamble Aug 2020

Repair & Rehabilitation Of Daly's (Shakey) Bridge, Cork City, Michael Minehane, John Gamble

Civil Engineering Research in Ireland 2020

This paper describes the rehabilitation of (Shakey) Bridge, an existing single-span suspension bridge crossing the northern channel of the River Lee in Cork City. The bridge was opened in 1927 to replace an earlier ferry crossing at the same location. Daly’s bridge is included on the Record of Protected Structures and the National Inventory of Architectural Heritage. It remains the only suspension bridge in Cork City and is the only surviving bridge of its kind in Ireland. It is considered to be a significant contributor to the architectural heritage of the city. This case study describes the project development including …

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Reinforcement Of Timber Elements In Compression Perpendicular To The Grain Using Compressed Wood Dowels, Michael Conway, Conan O'Ceallaigh, Sameer Mehra, Annette M. Harte Aug 2020

Reinforcement Of Timber Elements In Compression Perpendicular To The Grain Using Compressed Wood Dowels, Michael Conway, Conan O'Ceallaigh, Sameer Mehra, Annette M. Harte

Civil Engineering Research in Ireland 2020

In the past decade, there has been an increased focus on the environmental impacts of construction and a movement towards more sustainable construction products. Timber is one such sustainable product that can achieve these environmental targets but, while timber has a high strength-to-weight ratio parallel to the grain, it demonstrates poor strength perpendicular to the grain. As a result, stress perpendicular to the grain is an important factor in the design of timber structures, especially in areas of concentrated loading, such as supports. This paper describes a study, which examines the use of compressed wood dowels as a sustainable alternative …

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Development And Testing Of A Deployable Double Layer Tensegrity Grid, Michael Quilligan, Valentin Gomez-Jauregui, Cristina Manchado, Cesar Otero Aug 2020

Development And Testing Of A Deployable Double Layer Tensegrity Grid, Michael Quilligan, Valentin Gomez-Jauregui, Cristina Manchado, Cesar Otero

Civil Engineering Research in Ireland 2020

Tensegrity is a structural principle based on the use of isolated or contiguous pin jointed components in compression inside a net of continuous tension. Although the concept has been studied for many decades, relatively few examples of tensegrity structures have been used for civil engineering purposes.

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A Review Of The Engineering Constraints And Project Management Challenges Involved In Utilising Scot’S Church As A Heritage Asset Through Responsible Adaptive Reuse And Conservation Strategies, Óisín Smith Aug 2020

A Review Of The Engineering Constraints And Project Management Challenges Involved In Utilising Scot’S Church As A Heritage Asset Through Responsible Adaptive Reuse And Conservation Strategies, Óisín Smith

Civil Engineering Research in Ireland 2020

In the field of structural building, there has been a rising popularity in adaptive reuse of older structures, which stems from a variety of stimuli. Apart from preserving built heritage, providing old buildings with new functions promotes sustainability while preventing and containing urban sprawl. Target 11.4 of the United Nation’s Sustainable Development Goals Agenda 2030 explicitly outlines that “more efforts to protect and safeguard the world’s cultural and natural heritage” are required. In order to valorise and regenerate obsolescent structures, intervention is often required. The dissertation provides a comprehensive overview of conservation engineering and demonstrates the importance of an engineer’s …

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An Evaluation Of Design Issues Identified During Reviews Of Structural Designs Of Buildings From 2015 To 2020, Patrick Crean, Richard Osborne Aug 2020

An Evaluation Of Design Issues Identified During Reviews Of Structural Designs Of Buildings From 2015 To 2020, Patrick Crean, Richard Osborne

Civil Engineering Research in Ireland 2020

A recent study on failures of structures in Ireland indicated that approximately 40% could be apportioned to designer error. A 2019 report into recent structural cracking of a high-rise building in Sydney Australia recommended that Independent third party checking by a Chartered Engineer should be a requirement on all major projects prior to construction. The report also stated that the critical elements of the design on these projects should be identified. It is obvious that a certain percentage of buildings constructed each year contain design flaws and only a small proportion of these ever result in a failure. However there …

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Loading On Long Span Bridges In Heavily Trafficked Areas, Michael Quilligan, Eugene O'Brien Aug 2020

Loading On Long Span Bridges In Heavily Trafficked Areas, Michael Quilligan, Eugene O'Brien

Civil Engineering Research in Ireland 2020

The critical traffic loading condition for long-span bridges is congestion when vehicles may be closely spaced together. Data on very high traffic flows is limited however, as induction loops which are typically used to collect traffic data, are ineffective when traffic flow breaks down. A number of long span bridges are located in areas of high traffic with periods of recurring congestion occurring daily. While the inter-vehicle gap distances are greater than those occurring during non-recurring full stop accident type events, the high frequency of the recurring congestion events can increase the probability of a critical load case occurring.

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A Numerical Study Of The Effect Of Wind Barriers On Traffic And The Bridge Deck, Yuxiang Zhang, Philip Cardiff, Jennifer Keenahan Aug 2020

A Numerical Study Of The Effect Of Wind Barriers On Traffic And The Bridge Deck, Yuxiang Zhang, Philip Cardiff, Jennifer Keenahan

Civil Engineering Research in Ireland 2020

Wind actions can have a great impact on both bridges and traffic on bridges. However, structures designed to shelter the traffic from wind can influence the aerodynamic performance of the bridge deck, especially for long-span bridges. This study compares the effect of non-perforated walls and perforated walls used as wind barriers for traffic by conducting Computational Fluid Dynamics (CFD) simulations on three-dimensional geometries of a four-lane bridge deck. Steady-state simulations employ the Reynolds-Averaged Navier Stokes (RANS) method with the k-epsilon turbulence model and all simulations use parallel computing. An open-sourced software OpenFOAM is used.

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Simulation Of Traffic Loading On Long Span Bridges, Hang Zhang, Michael Quilligan Aug 2020

Simulation Of Traffic Loading On Long Span Bridges, Hang Zhang, Michael Quilligan

Civil Engineering Research in Ireland 2020

Existing long span load models have typically been developed using a number of conservative assumptions, and as such are more applicable to the design of new bridges rather than the assessment of existing structures. Excessive conservatism in such assumptions can lead to expensive and unnecessary interventions in existing bridges. Furthermore, existing load models do not always allow for correlations in traffic weights and vehicle positions on the bridge.

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Thermodynamic Cement Hydration Modelling Using Hydcem, Niall Holmes, Denis Kelliher, Mark Tyrer Aug 2020

Thermodynamic Cement Hydration Modelling Using Hydcem, Niall Holmes, Denis Kelliher, Mark Tyrer

Civil Engineering Research in Ireland 2020

Thermodynamics have been successfully applied to the field of cement hydration science to predict the formation of phase assemblages and pore solution chemistry. For any cement hydration model to be accepted, it must provide accurate forecasts of which solids may form and how the cement will dissolve over time. This is particularly important for the ongoing development of new sustainable cements and understanding their hydration behaviour in service.

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Computational Modelling Of Next Generation Materials For Steel Catenary Risers In The Offshore Industry, Padraic O'Donoghue, Ronan Devaney, Seán B. Leen Aug 2020

Computational Modelling Of Next Generation Materials For Steel Catenary Risers In The Offshore Industry, Padraic O'Donoghue, Ronan Devaney, Seán B. Leen

Civil Engineering Research in Ireland 2020

Production risers are used to conduct oil or gas from the wellhead to an offshore production facility. Due to technical challenges with flexible marine pipe at large depths, there has been a move to steel catenary risers (SCRs) in recent years, due to the availability of high strength low alloy (HSLA) steels, such as bainitic X100. HSLA steels make SCRs a viable option for deep water due to the reduction in complexity and hence cost, compared to flexible pipes. However fatigue response is an important factor in their design, particularly in the vicinity of welded connections.

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Fish Farm Monitoring For Blue Growth, Vikram Pakrashi, Wenliang Qiu, Michael O'Byrne, Paul Cahill, Basuraj Bhowmik, Bidisha Ghosh Aug 2020

Fish Farm Monitoring For Blue Growth, Vikram Pakrashi, Wenliang Qiu, Michael O'Byrne, Paul Cahill, Basuraj Bhowmik, Bidisha Ghosh

Civil Engineering Research in Ireland 2020

Fish farms are structures which require unique monitoring. There are problems related to marine growth and overloading, along with breaks in nets. These can lead to damage in fish or attacks of worms, which in turn is responsible for loss of fish. Such loss can be extremely expensive.

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