Str-913: Non-Linear Finite Element Analysis Of Modified Infilled Steel And Concrete Frame Systems,
2016
University of Alberta
Str-913: Non-Linear Finite Element Analysis Of Modified Infilled Steel And Concrete Frame Systems, Nabi Goudarzi, Mohammed Nazief, Yasser Korany
Canadian Society for Civil Engineering
To enhance the resiliency of framed structures under lateral loads, new infilled frame systems have been developed and evaluated using finite element method. The developed frame systems include haunches to reduce stress concentration at the frame’s corners under lateral in-plane loads thus improving the resistance of the infilled frame system. A previously developed and validated three dimensional finite element models based on the simplified micro-modelling technique were adopted in this study to investigate the behaviour of infilled steel and reinforced concrete frames under lateral in-plane loads. The investigated parameters include: the infill wall stiffness, the presence and size of haunches …
Str-914: Reliability-Based Design Optimization Of Prestressed Girder Bridges,
2016
University of Ottawa
Str-914: Reliability-Based Design Optimization Of Prestressed Girder Bridges, Yassin Taha Mashal Al-Delaimi, Elena Dragomeriscu
Canadian Society for Civil Engineering
Prestressed concrete girder bridges are popular structures due to their simplicity of fabrication, speed of construction, ease of inspection, maintenance and replacement. Many design factors play an essential role in deciding the members’ dimensions, geometry, weights, and cost. This reflects the importance of developing optimization tools that provide cost-effective design by determining certain design variables to achieve the best measurable objective function under given constraints. However, in order to maintain appropriate safety levels while performing the optimization process, it becomes necessary to adopt a probabilistic approach that considers the uncertainties associated with the basic design variables. In this paper, a …
Str-894: Bond Strength Of Ribbed-Surface High-Modulus Glass Frp Bars Embedded Into Unconfined Uhpfrc,
2016
Ryerson University
Str-894: Bond Strength Of Ribbed-Surface High-Modulus Glass Frp Bars Embedded Into Unconfined Uhpfrc, Mahmoud Sayed-Ahmed, Khaled Sennah
Canadian Society for Civil Engineering
High-modulus (HM) ribbed-surface glass fiber reinforced polymer (GFRP) bars have recently been used in concrete bridge decks to avoid corrosion of steel reinforcement resulting from the use of de-icing salts in winter times in North America. Recently, prefabricated full-depth deck panels (FDDPs), made of normal strength concrete or high performance concrete and reinforced with GFRP bars, are used in Canada to acceleration bridge construction. The FDDPs are connected through panel-to-panel and panel-to-girder connections. These connections are filled with joint-filled cementitious materials as ultra-high performance fiber-reinforced concrete (UHPFRC). This paper presents the experimental program to investigate the bond strength of the …
Str-920: Structural Behaviour Of Reinforced High Performance Concrete Columns Subjected To Monotonic Axial Loading,
2016
Ryerson University
Str-920: Structural Behaviour Of Reinforced High Performance Concrete Columns Subjected To Monotonic Axial Loading, Ali E. Yeganeh, Khandaker M. Anwar Hossain, M. S. Anwar
Canadian Society for Civil Engineering
This paper presents the results of experimental and analytical investigations on the structural performance of high performance reinforced concrete (HPC) columns subjected to monotonic axial loading. Reinforced columns made of self-consolidating concrete (SCC), engineered cementitious composite (ECC) and ultra-high performance concrete (UHPC) were tested to failure under axial loading. The test variables included concrete strength and length/slenderness of columns (classified as short and long columns). The UHPC and ECC columns demonstrated excellent ductility and higher energy absorbing capacity compared to their SCC counterparts. UHPC columns also illustrated higher ultimate load capacity compared to both ECC and SCC columns. The efficiency …
Str-921: Effect Of Non-Structural Components On The Modal Properties Of Buildings Using Ambient Vibration Testing,
2016
École de technologie supérieure
Str-921: Effect Of Non-Structural Components On The Modal Properties Of Buildings Using Ambient Vibration Testing, Rola Assi, Suze Youance, Alexis Bonne, Marie-José Nollet
Canadian Society for Civil Engineering
This paper illustrates the effect of non-structural components on the variation of dynamic properties of buildings in the elastic range using ambient vibration testing. A six-storey reinforced concrete building that forms part of the École de Technologie Supérieure campus was studied. Ambient vibration tests were conducted on this building during its construction and once finished. Measured records at different floor levels served to extract the natural frequencies, mode shapes and damping ratios of the building. Values obtained for the studied building, both at bare frame and finished phases were then compared. Calculated differences in the natural frequencies of the building …
Str-922: Impact Of Slenderness On The Seismic Response Of Rocking Frames In Ontario Nuclear Power Plants,
2016
Bruce Power
Str-922: Impact Of Slenderness On The Seismic Response Of Rocking Frames In Ontario Nuclear Power Plants, Amitabh Dar, Dimitrios Konstantinidis, Wael El-Dakhakhni
Canadian Society for Civil Engineering
Canadian Nuclear Power Plants (NPPs) are located on the eastern side of the North American continent, with the majority of them in Ontario. The Design Basis Earthquake (DBE), based on West Coast records, is prescribed in the Canadian nuclear standards. Seismic Probabilistic Risk Assessment studies of the existing plants consider time histories obtained from the latest research on the East Coast earthquakes as seismic input to the analysis. Although Canadian standards are silent about rocking response of unanchored objects, various industry guidelines and the standard ASCE 43-05 prescribe methodologies in this regard. Applications of a rocking frame in a NPP …
Str-923: Fatigue Of Stud Shear Connectors In Steel-Precast Composite Bridges,
2016
University of Waterloo
Str-923: Fatigue Of Stud Shear Connectors In Steel-Precast Composite Bridges, Matthew Sjaarda, Taylor Porter, Jeffrey S. West, Scott Walbridge
Canadian Society for Civil Engineering
Modular bridge systems consisting of precast concrete deck panels connected to steel girders are becoming increasingly popular due to their rapid construction and optimal material utilization. The shear connection is a critical element of the system, having significant impacts on construction time, economic and environmental cost, structural integrity, and durability. Today welded shear studs are by far the most common type of shear connection. In steel-precast composite bridges, the studs are commonly grouped together so that the precast deck panels can be affixed to the girders by providing full depth “shear pockets” filled with grout. A laboratory beam testing program …
Str-924: Effect Of Low Temperature On The Shear-Fatigue Performance Of Reinforced Concrete Beams,
2016
Queen’s University
Str-924: Effect Of Low Temperature On The Shear-Fatigue Performance Of Reinforced Concrete Beams, M. Mehdi Mirzazadeh, Martin Noël, Mark F. Green
Canadian Society for Civil Engineering
This paper investigates the fatigue behaviour of a reinforced concrete beam (without shear reinforcement) at low temperature (-20°C) compared to a similar beam tested near room temperature (+16°C). Two large-scale steel reinforced beams (200 mm x 400 mm x 4200 mm) were fabricated and tested. The beams had temperature differentials over their depth to simulate solar radiation and in-service temperature of the bridges. The beams were cyclically loaded to failure with a stress range representing the ratio of live to dead loads found in most bridges. This study showed that low temperature increased the fatigue life of the reinforced concrete …
Str-925: Bonding Behavior In Bridge Steel-Reinforced Elastomeric Isolators,
2016
University of British Columbia
Str-925: Bonding Behavior In Bridge Steel-Reinforced Elastomeric Isolators, Moein Ahmadipour, Farshad Hedayati-Dezfuli, M. Shahria Alam
Canadian Society for Civil Engineering
Steel-reinforced elastomeric isolators (SREIs) have been shown to be efficient devices to protect structures against moderate and severe earthquakes by isolating them from ground motions. Bridge elastomeric isolators, however, deteriorate when undergone repetitive loading cycles due to either earthquakes or traffic loadings. One major damage type observed dominantly in these devices is delamination or de-bonding between rubber and supporting plates and steel reinforcements, if cold-bonded. This paper investigates potential damage scenarios likely to occur in cold-bonded bridge SREIs. It also looks into bonding properties of rubber and steel in tension and shear, the two important functional characteristics of elastomeric isolators. …
Str-926: Footfall-Induced Vibration: Prediction And Control Strategies,
2016
Rowan Williams Davies & Irwin Inc.
Str-926: Footfall-Induced Vibration: Prediction And Control Strategies, J. Shayne Love, Trevor C. Haskett, Aaron G. Gradeen
Canadian Society for Civil Engineering
Footfalls can produce vibrations that are irritating to occupants, or disruptive to vibration-sensitive spaces in hospitals and research laboratories. This paper describes, using case studies, techniques that can be used to predict vibrations, and mitigation strategies to control them. Firstly, pedestrian loading on footbridges is described. Stochastic simulations are conducted in which a number of pedestrians with random weights, walking speeds, and walking paths cross a bridge with random spacing. The resulting vibration response of the bridge is determined to estimate the peak acceleration of the bridge. For the case considered, tuned mass dampers (TMDs) were subsequently installed on the …
Str-927: Shear Resistance Of Lightweight Self-Consolidating Concrete Beams,
2016
Ryerson University
Str-927: Shear Resistance Of Lightweight Self-Consolidating Concrete Beams, K. Sathiyamoorthy, Khandaker M. Anwar Hossain, A. Lotfy
Canadian Society for Civil Engineering
This paper presents the shear behavior of lightweight self-consolidating concrete (LWSCC) beams without shear reinforcement compared to those made with normal weight self-consolidating concrete (SCC). The variables in this experimental and Code based study was shear span to depth ratio, concrete types and longitudinal reinforcement. The performance of LWSCC was compared with normal SCC beams based on load-deformation response, stress-strain development, and shear strength and failure modes. LWSCC beams showed lower post-cracking shear resistance and the shear strength of LWSCC/SCC beams increased with the decrease of shear span to depth ratio. LWSCC beams showed higher number of cracks and wider …
Str-928: Shear Resistance Of Composite Beams Without Shear Reinforcement,
2016
Ryerson University
Str-928: Shear Resistance Of Composite Beams Without Shear Reinforcement, Md. Saiful Hasib, Khandaker M. Anwar Hossain
Canadian Society for Civil Engineering
This paper presents the shear behaviour of composite beams made of combinations of high performance concretes (HPCs) such as self-consolidating concrete (SCC) and ductile Engineered Cementitious Composite (ECC). The variables in this experimental and Code based study was shear span to depth ratio, concrete types, longitudinal reinforcement and depth ratio (of ECC and SCC layer). The performance of ECC-SCC composite beams was compared with full depth normal SCC beams based on load-deformation response, stress-strain development, shear strength, failure mode, energy absorption capacity and aggregate-dowel action. The performance of American code in predicting shear strength of SCC beams including ECC-SCC composite …
Str-929: Experimental Testing Of A New Hysteretic Damper For Base Isolated Bridges,
2016
Université de Sherbrooke
Str-929: Experimental Testing Of A New Hysteretic Damper For Base Isolated Bridges, Seyyed Behnam Golzan, Sébastien Langlois, Frederic P. Legeron
Canadian Society for Civil Engineering
An experimental procedure was developed to implement a simplified design method of supplemental dampers for isolated highway bridges. For seismically base-isolated bridges subjected to an earthquake, the principal modes of the structure are in the isolation level which effectively lessens the seismic base shear conveyed from the superstructure to the substructure. However, this also has the effect of increasing superstructure displacement. To control the deformation of the isolators, supplemental energy dissipating devices can be introduced into the isolation system. This may nevertheless increase the total structure base shear and the merit of adding dampers has to be evaluated properly. In …
Str-930: Cross Laminated Timber Walls With Openings: In-Plane Stiffness Prediction And Sensitivity Analysis,
2016
University of British Columbia
Str-930: Cross Laminated Timber Walls With Openings: In-Plane Stiffness Prediction And Sensitivity Analysis, Md. Shahnewaz, M. Shahria Alam, Thomas Tannert, Marjan Popovski
Canadian Society for Civil Engineering
Cross-laminated timber (CLT) is gaining popularity in residential and non-residential applications in the North American construction market. An accurate quantification of in-plane stiffness of the CLT walls with openings is required to design a CLT structure subjected to lateral loads. Nevertheless, till today, no general approach is available for the design of CLT-members loaded in plane and there are no standardized methods for determining the stiffness of CLT shearwalls in the respective material design standards: the CSA O86 in Canada, and the NDS in the US. This study aims to quantify the stiffness of CLT walls with openings under in-plane …
Str-931: Timber I-Joists With Web Openings: Reinforcement, Capacity Prediction And Sensitivity Analysis,
2016
University of British Columbia
Str-931: Timber I-Joists With Web Openings: Reinforcement, Capacity Prediction And Sensitivity Analysis, Md. Shahnewaz, M. Shahidul Islam, M. Shahria Alam, Thomas Tannert
Canadian Society for Civil Engineering
Timber I-joists are a popular product in light-frame wood construction in North America. The design with timber I-joists, however, has not yet achieved the same level of refinement compared to reinforced concrete or steel structures. One of the reasons is that timber I-joists have higher variability in their material properties than more homogeneous building materials. Additionally, although very commonly applied in practice, engineers and practitioners have limited knowledge and guidance for I-joists with web opening. As a result, in many cases the design of timber I-joists based on manufacturer’s specifications lead to very conservative solutions. The present research predicts the …
Str-934: Fatigue Response Of Uhpc As A Closure Strip Material In Prefabricated Bridge Applications,
2016
University of Waterloo
Str-934: Fatigue Response Of Uhpc As A Closure Strip Material In Prefabricated Bridge Applications, Benjamin D. Dow, Scott Walbridge, Jeffrey S. West
Canadian Society for Civil Engineering
Replacement of concrete bridge decks can be an expensive process. In order to decrease costs and time of construction, precast deck panels can be used with closure strips cast in place between the panels. In order to ensure that these connections can withstand the rigors of a bridge’s life cycle, fatigue testing was completed on a specimen consisting of two precast concrete panels reinforced with GFRP and connected using a UHPC closure strip. These panels were subjected to 2,000,000 cycles of fatigue loading at three locations and subject to static failure loading at one location following fatigue loads. It was …
Str-937: Behaviour Of Frp-Reinforced Cfft Columns Under Axial Compression Loading,
2016
University of Sherbrooke
Str-937: Behaviour Of Frp-Reinforced Cfft Columns Under Axial Compression Loading, Asmaa Abdeldaim Ahmed, Radhouane Masmoudi
Canadian Society for Civil Engineering
This paper presents the test results of an experimental study aimed at investigating the axial behaviour of CFFT columns internally reinforced with steel and FRP bars. A total of eight reinforced concrete (RC) and concrete-filled FRP tube (CFFT) columns were constructed and tested until failure. All columns had 1900-mm in height and 213-mm in diameter. The test parameters were: (1) internal reinforcement type (steel, glass FRP (GFRP), or carbon FRP (CFRP) bars) and amount, (2) GFRP tube thicknesses, and (3) nature of axial loading type (i.e. monotonic and cyclic). The experimental results revealed that the CFFT columns reinforced with GFRP …
Str-938: Flexural Behaviour Of Rectangular Frp-Tubes Filled With Reinforced Concrete: Experimental And Analytical Investigations,
2016
University of Sherbrooke
Str-938: Flexural Behaviour Of Rectangular Frp-Tubes Filled With Reinforced Concrete: Experimental And Analytical Investigations, Ahmed Abouzied, Radhouane Masmoudi
Canadian Society for Civil Engineering
This paper presents experimental and analytical investigations on the flexural behaviour of rectangular concrete-filled fiber-reinforced polymer (FRP) tube (CFFT) beams with steel rebar. Eight full-scale CFFT beams and two control reinforced concrete (RC) beams were tested under a four-point bending. Several parameters as the FRP tubes thickness, fiber laminates, and steel reinforcement were studied. The experimental results indicate outstanding performance of the CFFT beams in terms of strength and ductility compared to the RC beams. Some CFFT beams attained flexural strength and ductility 540% and 1430% higher than that of the RC beams, respectively. Theoretical analysis was developed to determine …
Str-940: Parametric Simulation Of Roof Structural Snow Loads,
2016
Rowan Williams Davies & Irwin Inc.
Str-940: Parametric Simulation Of Roof Structural Snow Loads, Albert J. Brooks, Jill V. Bond, Scott L. Gamble, Jan C. Dale
Canadian Society for Civil Engineering
While the National Building Code of Canada (NBCC) provides engineers with suitable snow loading guidelines for structural design, the strict application of the code may not lead to an optimized structural design. Generalizations have been made to ensure the applicability of the code to the majority of potential structures within Canada, which result in conservative estimates in certain situations. In particular, the interaction between region-specific prevailing wind directionality, climate and roof orientation are not accounted for. However, the development of advanced physical and numerical snow simulation approaches allows for the investigation of building-specific variables that affect snow loading. The Finite …
Str-941: Numerical Investigation Of Reinforced Concrete Barriers Subjected To Blast Loading,
2016
Western University
Str-941: Numerical Investigation Of Reinforced Concrete Barriers Subjected To Blast Loading, Ahmed M. Ibrahim, Hamed M. Salem, Ahmed M. Farahat
Canadian Society for Civil Engineering
People’s lives are threatened by explosions; the tragic terrorist attacks have forced the governments to consider the importance of dealing with these attacks. With the rising threat of terrorism, protecting critical civil infrastructure such as embassies, governmental buildings, and airports against bomb attacks has become a critical issue. In the current research, reinforced concrete barriers subjected to blast loading are numerically investigated using Applied Element Method “AEM”. The blast loads adopts the ASCE guidance for design of blast-resistant buildings in petrochemical facilities. Fully nonlinear dynamic analysis was considered where the barriers thickness and reinforcement, end connections were parametrically investigated. It …
