Architectural Engineering Commons^™

Deflection Limits For Tilt-Up Wall Serviceability - The History Behind Changes To Chapter 14 Of Aci 318, John Lawson

Architectural Engineering

Tilt-up construction is one of the most ubiquitous forms of commercial construction in many parts of the country. Thanks to its efficient wall and roof systems, more than 700 million ft² (65 million m²) of tilt-up buildings were constructed in the U.S. in 2006.¹
Tilt-up's current popularity is even more remarkable considering that it wasn't until the 1980s that building codes began to recognize the unique design of slender tilt-up wall panels. In fact, it wasn't until ACI 318-99² was published that the design of slender wall panels was codified on a national level. Of …

Investigations Of Multi-Channel Auralization Technique For Solo Instruments And Orchestra, Michelle C Vigeant, Lily M. Wang, Jens Holger Rindel

Durham School of Architectural Engineering and Construction: Faculty Publications

Computer modeling of room acoustics is a useful tool in the design of acoustically sensitive spaces and an important outcome from these programs is auralizations.  This study examined the perceived changes in realism and source width when listening to multi-channel auralizations compared to single channel auralizations for both solo instruments and a full orchestra.  The first experiment, which examined subjective judgments of auralizations made from solo instruments, showed that perceived realism increased as the number of channels was increased from one to four to thirteen, while the relationship between source width and number of channels was less clear. In the …

Evaluating Structural Form: Is It Sculpture, Architecture Or Structure?, Edmond P. Saliklis

Architectural Engineering

The purpose of this paper is to discuss the idea of a continuum between sculpture form, architectural form and structural form. A linkage between the various forms will be proposed, and several scholarly views on this subject will be presented. Then, this paper will describe a brief web-based survey which tested people’s subjective categorization of various sculptural, architectural and structural forms. The target audience of the web-based survey was college students interested in building design and high school students. Finally, this paper will analyze whether or not presenting the respondents with the idea of a proposed continuum between such forms …

Strengthening Of A Reinforced Concrete Bridge With Externally Bonded Steel Reinforced Polymer (Srp), Alexis Lopez, Nestore Galati, Tarek Alkhrdaji, Antonio Nanni

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This paper introduces steel reinforced polymer (SRP) as a way to strengthen civil structures. This technique consists of cords formed by interwoven high-strength steel wires embedded within a polymeric resin. a comprehensive study addressing analysis, design, installation, load rating and monitoring of a bridge strengthened with this technology is reported. the SRP system was easily installed, demonstrating its similarity to more traditional fiber reinforced polymer (FRP) strengthening techniques. Load tests were performed to evaluate the bridge structural behavior prior and after the strengthening in accordance with AASHTO specifications, showing that the rehabilitation performed as predicted and therefore created the possibility …

Tedesko’S Philadelphia Skating Club: Refinement Of An Idea, Edmond P. Saliklis, David P. Billington, Anneliza W. Carmalt

Architectural Engineering

This paper presents new aspects of Anton Tedesko’s design for an important thin shell concrete roof. The study of this roof results from the examination of original engineering drawings and calculations which we present with the goal of promoting a greater understanding of the structural design of a major figure in the tradition of 20th century building.

Bionic Architectural Design: Assembly, Symbiosis, & Repetition, Henry Louth

Honors Capstones

No abstract provided.

On The Formation And Propagation Of Nonlinear Internal Boluses Across A Shelf Break, Subhas K. Venayagamoorthy, Oliver B. Fringer

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

High-resolution two- and three-dimensional numerical simulations are performed of first-mode internal gravity waves interacting with a shelf break in a linearly stratified fluid. The interaction of nonlinear incident waves with the shelf break results in the formation of upslope-surging vortex cores of dense fluid (referred to here as internal boluses) that propagate onto the shelf. This paper primarily focuses on understanding the dynamics of the interaction process with particular emphasis on the formation, structure and propagation of internal boluses on shelf. A possible mechanism is identified for the excitation of vortex cores that are lifted over the shelf break, from …

Ua66 2007 Student Awards Ceremony, Wku Ogden College Of Science & Engineering

WKU Administration Documents

Program recognizing Ogden College students with brief list of activities for each student.

Damage Detection In Ambient Vibration Using Proportional Flexibility Matrix With Incomplete Measured Dofs, Zhongdong Duan, Guirong Yan, Jinping Ou, Billie F. Spencer

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Structural Damage Detections based on the Changes of Dynamic Properties Are a Major Concern Tor Structural Health Monitoring. in This Paper. Efforts Are Made to Extend the Flexibility-Based Damage Localization Methods, Especially the Damage Locating Vector (DLV) Method, to the Case of Ambient Vibration with Incomplete Measured Degree of Freedom, Where Flexibility Matrices Are Not Available. First, the Method to Assemble a Proportional Flexibility Matrix (PFM) with Arbitrarily Scaled Modal Shapes of Full Measured Degrees of Freedom (DOF) is Introduced. the PFM is within a Scalar Multiplier to the Real Flexibility Matrix, and the Multiplier is Shown to Be the …

Reflector Responses: A Comparison Between Odeon’S Modified Ray Tracing Algorithm And A Filtered Boundary Element Method Model, Jonathan Rathsam, Lily M. Wang, Jens Holger Rindel, Claus Lynge Christensen

Durham School of Architectural Engineering and Construction: Faculty Publications

The biggest challenge for geometrical room acoustic computer models is to capture complex wave phenomena while maintaining the low computational load of the ray tracing algorithm. Special corrections must be added to the ray tracing algorithm to account for wave phenomena such as edge diffraction, which are ignored by classical geometrical acoustics. ODEON, a well-known geometrical computer model, is in the process of upgrading its ray tracing and scattering algorithm. The new algorithm allows users to specify transmission through reflector panel arrays. To aid in the development of ODEON’s new algorithm, its predictions are compared with predictions from a boundary …

The Use Of Thermoelectric Peltiers To Recapture Waste Heat, Navarre Bartz

Opportunities for Undergraduate Research Experience Program (OURE)

Peltier devices are a method of converting differences in temperature into electrical energy. Using data from a supplier of these devices, calculations were made to determine the efficiency of these devices in conjunction with a residential solar hybrid electric system. The initial calculations show efficiencies less than 2% with the temperature differences experienced during the springtime. While this efficiency doesn't sound stellar, taking into account the current efficiency of residential solar cells, this would be an appreciable addition to the power output of a residential solar system.

Durability Performance Of Polyurea Confined Concrete Cylinders, Matthew Beyer

Opportunities for Undergraduate Research Experience Program (OURE)

No abstract provided.

Analysis Of Vertical Takeoff And Landing (Vtol) Unmanned Aerial Vehicles (Ua V) With Emphasis On Tilt Duct And Tilt Rotor Systems, Devin Boyle

Opportunities for Undergraduate Research Experience Program (OURE)

No abstract provided.

Baugruppe - Lessons From Freiburg On Cooperative Housing : Lessons From Freiburg On Cooperative Housing, Joseph Little

Articles

Creating Sustainable Communities in the UK and Ireland

The Genesis of Quartier Vauban

Evaluation Of Time Independent Rheological Models Applicable To Fresh Self-Compacting Concrete, Dimitri Feys, Ronny Verhoeven, Geert De Schutter

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Self-Compacting Concrete is a New Type of Concrete Which is More Liquid Compared to Traditional Concrete and Which Does Not Need Any Form of External Compaction. as a Result, This Type of Concrete is Suitable for a New Placing Technique: Pumping SCC from the Bottom in the Formwork and Letting It Rise in the Formwork Due to the Applied Pressure. in Order to Understand the Phenomena Occurring during Pumping Operations, the Rheological Properties of SCC Must Be Investigated and Controlled. Tests Have Been Performed with Two Different Rheometers, Which Are Described in This Paper. for the Tattersall MIk-II Rheometer, a …

Soil Suction And Behavior Of Chemically Treated Clays, Thomas M. Petry, Cheng Ping Jiang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Expansive clay soils have caused significant damage throughout the world. Chemical stabilizing agents have been used to reduce the swell of expansive clay soils, but the effect of chemical treatment on the matric and osmotic suction of soils has not been investigated previously. Two subject soils were chosen to study soil suction and the behavior of chemically treated clay. One soil, with high swell potential, was from Irving, Texas. the other soil, with moderate swell potential, was from Slater, Missouri. Hydrated lime and KIS (a proprietary solution containing potash and ammonium lignosulfonate) were used as chemical stabilizers. Select physical and …

Nondestructive Evaluation Of Rc Structures Strengthened With Frp Laminates Containing Near-Surface Defects In The Form Of Delaminations, Mahmut Ekenel, John J. Myers

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Fiber reinforced polymer (FRP) composites are being utilized in a wide range of application areas in structural rehabilitations because these materials are less affected by corrosive environmental conditions and known to provide longer life with less maintenance. However, there are still some concerns about FRP strengthened reinforced concrete (RC) structures, such as the presence of near-surface defects. Currently limited data exists regarding this issue. the presence of near-surface defects in the form of delaminations between the fiber reinforced polymer (FRP) laminate and concrete substrate can significantly affect the structural integrity and stiffness of the structural section. These defects should be …

Quantification Of Steroid Sex Hormones Using Solid-Phase Extraction Followed By Liquid Chromatography-Mass Spectrometry, Youssef Filali-Meknassi, Muriel Auriol, Craig D. Adams, Rao Y. Surampalli

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In this study, the occurrence of trace amounts of natural and synthetic steroid estrogens in the aquatic environment was studied using liquid chromatography coupled with electrospray mass spectrometry, following solid-phase extraction (SPE). the SPE was performed with C18 and NH2 cartridges. the first objective was to develop a reliable method for analyzing steroid estrogens (resulting from human and animal excretions) in different matrices. the method developed was then applied to quantify the occurrence of natural and synthetic hormones (estrone [E1], 17β-estradiol [βE2], 17α-estradiol [αE2], estriol [E3], and 17α-ethinylestradiol [EE2]) in environmental samples in surface water and wastewater treatment plant (WWTP) …

A Call For Unified Design - Deflection Limits For Tilt-Up Wall Serviceability, John Lawson

Architectural Engineering

As one of the fastest-growing construction methods in the industry today, tilt-up construction, has witnessed a great deal of flux in its governing building codes.

Dynamic And Economic Design Of Rigid Retaining Wall, Y. Wu, Shamsher Prakash, V. K. Puri

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

A 2-D model which accounts for the effect of coupled sliding and rocking motion and uses strain dependent soil stiffness and material damping for calculating the response of rigid retaining walls subjected to dynamic loads, was developed earlier. This model was used to study the effect inclination of the wall face in contact with the backfill, on its displacement under the effect of ground motions due to Northridge, ElCentro and Loma Prieta earthquakes. the effect of wall inclination on cumulative displacements is discussed and its role in achieving possible cost effectiveness in design of rigid retaining wall is highlighted. Copyright …

Collapse Assessment Of Degrading Mdof Structures Under Seismic Excitations, Mouchir Chenouda, Ashraf Salah Eldin Ayoub

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Seismic code provisions are now adopting performance-Based methodologies, where structures are designed to satisfy multiple performance objectives. Most codes rely on approximate methods to predict the desired seismic demand parameters. Most of these methods are based on simple SDOF models, and do not take into account neither MDOF nor degradation effects, which are major factors influencing structural behavior under earthquake excitations. More importantly, most of these models can not predict collapse explicitly under severe seismic loads. This study presents a newly developed model that incorporates degradation effects into seismic analysis of MDOF structures. a new energy-Based approach is used to …

Design Of Concrete Railing Reinforced With Glass Fiber Reinforced Polymer Bars, Fabio Matta, Antonio Nanni

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The use of Fiber Reinforced Polymer (FRP) reinforcement is a practical alternative to conventional steel rebars in concrete structures subjected to aggressive environments. the solution is attractive for bridge deck and rail applications, as it eliminates corrosion of the steel reinforcement, which is the major instrument of degradation. Due to the peculiar physical and mechanical characteristics of advanced composite materials, the design philosophy of FRP reinforced concrete (RC) structures differs from that of traditional RC. This paper introduces a systematic approach adopted for the structural and functional design of an open-post bridge railing reinforced with Glass FRP bars (GFRP) as …

Softened Truss Model For Rc Torsional Members Under Combined Action, Gary Greene, Abdeldjelil Belarbi

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

No abstract provided.

Remote Health Monitoring Of The First Smart Bridge In Florida, Ebrahim Mehrani, Ashraf Salah Eldin Ayoub

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Monitoring of civil engineering structures is a new area that has gained significant attention recently and became a topic of extreme national interest. This area is being driven by the need to develop efficient condition assessment procedures for structural performance in response to societal and economic needs. the main goal of monitoring is to detect accurately and efficiently structural damage either due to long-term deterioration processes or due to extreme events (e.g. earthquakes, blasts). with the emergence of new technologies, structures can now be monitored remotely from a central monitoring station located several miles away from the field. Sensors are …

Lagrangian Mixing In Decaying Stably Stratified Turbulence, Subhas K. Venayagamoorthy, Derek D. Stretch

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Direct numerical simulations are used to study mixing and dispersion in decaying stably stratified turbulence from a Lagrangian perspective. The change in density of fluid particles owing to small-scale mixing is extracted from the simulations to provide insight into the mixing process. These changes are driven by temporally and spatially intermittent events that are strongly suppressed as the stratification increases and overturning motions disappear. This occurs for times Nt > 2π i.e. after one buoyancy period, where N is the buoyancy frequency. The role of small-scale mixing processes in the density (or buoyancy) flux is analyzed. After an initial transient, we …

Design Of Window Glass For Lateral Pressures, Joseph E. Minor, H. Scott Norville

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

ASTM Standard E 1300-04 ("Standard practice for determining load resistance of glass in buildings") outlines procedures for determining the strength of window glass products when the glass is subjected to uniform lateral pressure. This standard practice addresses each of the commonly used window glass products (monolithic glass, laminated glass, and insulating glass) that are fabricated from annealed, heat strengthened, and fully tempered glass plates, used singly or in combination. the procedures are based on principles of structural mechanics, are thorough, and are presented in clear and concise terms. Analyses of the basis for and the scope of these procedures lead …

Mansfield Ct: Planning A New Village Center, Maggie Jones, Richard Barringer

Planning

The case follows the development of a plan for a new village center in Storrs, the central village of Mansfield, Connecticut. A process that was transparent and inclusive of the community members yielded a plan that gained the approval of the Town, the landowner (the University of Connecticut), and the citizenry. The process relied on the mending of fences, the leadership of key participants, and an innovative strategy that included development of a nonprofit corporation and creative use of grant money. While zoning changes are still in the works, the first stage of building goes forward.

Augusta Me: The New Bridge Begets A New Planned Neighborhood, Molly Pulsifer, Richard Barringer

Planning

Construction of a new Third Bridge over the Kennebec River in Augusta offered the prospect of a new and handsome gateway to the city. Further, the resulting change in traffic patterns offered the City the chance to plan for a pattern of development quite different from what the city had experienced for the past half-century. The case study describes the planning and construction of the new bridge and corridors that re-routed traffic out of Augusta’s downtown and older neighborhoods, and created the opportunity for planned development adjacent to the corridor created by the new bridge. It goes on to describe …

The Civil Engineering Faculty Of The Future, Allen C. Estes, Ronald Welch

Architectural Engineering

The American Society of Civil Engineers (ASCE) has published the Civil Engineering Body of Knowledge (BOK) for the 21st Century that attempts to define the knowledge, skills and attitudes required of a civil engineer. A section of that document addresses who should teach this body of knowledge. It concludes that civil engineering faculty must be scholars, effective teachers, practitioners, and role models. While true, there are a number of complex issues that arise such as whether it is possible for one person to possess all of these attributes, whether such a model best serves the projected trends in civil engineering …

Program Assessment The Easy Way: Using Embedded Indicators To Assess Program Outcomes, Karl Fred Meyer, Allen C. Estes, Ronald W. Welch, David G. Winget

Architectural Engineering

The culminating design experience for civil engineering majors at the United States Military Academy (USMA) is CE492, Design of Structural Systems. CE492 serves as a “capstone” experience or one in which students are faced with a multi-disciplinary design project incorporating facets from all previous civil engineering courses. Previous capstone experiences have required students to design structures planned for construction or currently under construction at the Academy, thus providing an opportunity for site visitations and active participation with key players in the project development process. Since CE492 provides a multi-disciplinary experience, it also provides an ideal opportunity for the application of …