Str-962: Flexural Strengthening Of Rc Beams Using Glass-Frcm,
2016
University of Windsor
Str-962: Flexural Strengthening Of Rc Beams Using Glass-Frcm, Abdulla Jabr, Amr El Ragaby, Faouzi Ghrib
Canadian Society for Civil Engineering
Externally bonded Fiber reinforced polymer (FRP) sheets made of fiber net embedded in epoxy matrix has been successfully used in the repair and strengthening of both the shear and flexural capacities of reinforced concrete (RC) beams, slabs and columns since the 90's. Although the epoxy gives the system most of its durability, it is also responsible for many disadvantages, such as poor performance in elevated temperature and fire, lack of permeability, as it traps moisture, and degradation when exposed to ultraviolet radiation. In order to avoid such drawbacks, composite material utilizing cement-based matrix called Fabric Reinforced Cementitious Matrix (FRCM) has …
Str-972: Top-Down Construction Of The New Lrt Overhead Bridge, Kitchener, Ontario,
2016
Dillon Consulting Limited
Str-972: Top-Down Construction Of The New Lrt Overhead Bridge, Kitchener, Ontario, Brad R. Craig, Jeffrey Giroux
Canadian Society for Civil Engineering
A new Light Rail Transit (LRT) system is being constructed in Waterloo Region. The first phase of construction is scheduled for completion in 2017 and will connect Conestoga Mall in the City of Waterloo and Fairview Park Mall in the City of Kitchener, a distance of 19 km. The LRT route crosses the existing Conestoga Parkway (Highway 7/8) in Kitchener-Waterloo, requiring the construction of a new structure under the busy freeway. In 2014-15, the Ministry of Transportation, Ontario (MTO) administered the construction of the new single span bridge using a unique top-down construction technique.
Str-964: Studies On Vibration Serviceability Assessment Of Aluminum Pedestrian Bridges,
2016
University of Waterloo
Str-964: Studies On Vibration Serviceability Assessment Of Aluminum Pedestrian Bridges, Stanley H. Fong, Scott Walbridge, Sriram Narasimhan
Canadian Society for Civil Engineering
Vibration serviceability is often the governing design factor for slender, lightweight footbridges. However, there is currently a large gap that exists between our understanding from a modeling perspective and their actual vibration behaviour. Recent experimental tests conducted at the University of Waterloo have underscored these discrepancies and have provided an unique opportunity to not only validate many of the models currently in use, but also to propose new modifications to better align with experimental test results. Specifically, issues such as how to design for lateral vibrations and crowd-induced loading and calibration of load factors, will be addressed in this presentation. …
Str-969: Seismic Design Procedure For Steel Multi-Tiered Concentrically Braced Frames Beyond Csa S16 Limit,
2016
McGill University
Str-969: Seismic Design Procedure For Steel Multi-Tiered Concentrically Braced Frames Beyond Csa S16 Limit, Ali Imanpour, Robert Tremblay
Canadian Society for Civil Engineering
Steel Multi-Tiered Braced Frames (MT-BFs) generally represents a more practical and cost-effective solution in tall single storey steel buildings such as airplane hangars, recreational buildings or convention centers. Special seismic design requirements including column design for in-plane and out-of-plane flexural demands have been introduced for MT-BFs in the Canadian steel design standard CSA S16. In the current CSA S16, MT-BFs are also limited to three and five tiers, respectively, for Type MD (moderately ductile) and Type LD (limited ductility) braced frame categories. In this paper, a 4-tiered Type MD braced frame, exceeding the 3-tier height limit, is designed with explicit …
Str-968: Wavelet Entropy-Based Damage Identification Technique For Hybrid Frp-Concrete Structures,
2016
University of Calgary
Str-968: Wavelet Entropy-Based Damage Identification Technique For Hybrid Frp-Concrete Structures, Mohammad Moravvej, Mamdouh El-Badry, Parham Joulani
Canadian Society for Civil Engineering
Civil infrastructure, particularly bridges, is designed and built to be safe against failure and to perform satisfactorily during their service life. However, this infrastructure has been deteriorating at an alarming rate due to aging, inadequate maintenance, adverse environmental conditions, and constantly growing transportation demand. Utilization of corrosion-resistant composite materials, particularly fibre-reinforced polymers (FRP), has been an encouraging solution for the durability problems of concrete bridges. However, similar to conventional structures, the performance of hybrid FRP-concrete structures can be affected by various types of damage. Therefore, in order to ensure both safety and serviceability of these structures, it is essential to …
Str-966: Seismic Retrofit Of Existing Low-Rise Steel Buildings In Eastern Canada Using Rocking Braced Frame System,
2016
Polytechnique Montreal
Str-966: Seismic Retrofit Of Existing Low-Rise Steel Buildings In Eastern Canada Using Rocking Braced Frame System, Robert Tremblay, Paul Mottier, Colin Rogers
Canadian Society for Civil Engineering
A promising retrofit strategy consists of allowing deficient braced frames to rock at their bases to reduce the force demands on the structure and the foundation. For low-rise buildings, modifications to the structure may be limited to the braced frames, which then represent a very effective solution when compared to other approaches where alterations are needed along the entire lateral load path. In the article, the rocking braced frame solution is investigated for the seismic retrofit of 3-storey typical office buildings designed in accordance with codes prevailing in the early 1980s. The frames are located in Montreal, QC, and firm …
Str-976: Effect Of Horizontal Reinforcement Anchorage End Detail On Seismic Performance Of Reinforced Masonry Shear Walls,
2016
Concordia University
Str-976: Effect Of Horizontal Reinforcement Anchorage End Detail On Seismic Performance Of Reinforced Masonry Shear Walls, Hany M. Seif Eldin, Khaled Galal
Canadian Society for Civil Engineering
The most recent design codes for masonry structures necessitate the use of reinforced masonry (RM) shear walls in medium and high seismic areas. There are several factors that control the contribution of the horizontal reinforcement to the in-plane shear capacity of RM shear walls. One of these factors is its anchorage end detail. The current version of the Canadian Standards Association CSA S304-14 for design of masonry structures requires that the anchorage of the horizontal reinforcing bars in the plastic hinge region shall have a 90° or more standard hook at the ends of the wall. However, a 180° standard …
Str-975: Effect Of Shear Span To Depth Ratio On Seismic Performance Of Reinforced Masonry Shear Walls,
2016
Concordia University
Str-975: Effect Of Shear Span To Depth Ratio On Seismic Performance Of Reinforced Masonry Shear Walls, Hany M. Seif Eldin, Khaled Galal
Canadian Society for Civil Engineering
Over the past few decades there has been a substantial increase in the number of multi-story buildings constructed with reinforced masonry (RM). Similar to reinforced concrete (RC) buildings, shear walls are a popular lateral load resisting system in regions of high seismic activity due to its capability to provide lateral stiffness, strength and energy dissipation. One of the parameters that affects the inelastic behaviour and ductility of RM shear walls is the shear span to depth ratio, M/Vdv. This paper experimentally investigates the effect of M/Vdv on the seismic performance of RM shear walls that are dominated by diagonal …
Str-990: Sustainable Grouted Helical Piles: Materials And Performance,
2016
Western University
Str-990: Sustainable Grouted Helical Piles: Materials And Performance, Mohamed A. A. Mansour, Moustafa Aboutabikh, Ahmed M. Soliman, M. Hesham El Naggar
Canadian Society for Civil Engineering
Cementitious materials are widely used as a construction material all over the world. However, cement industry has high environmental impact such as the release of CO2 and the consumption of natural resources for its manufacturing energy. Therefore, reducing cement consumption is vital to achieve sustainable green construction practices. In this study, the effects of using treated oil sand waste (TOSW) as a partial replacement of cement in grouted helical pile applications were investigated. Fresh and hardened properties of the green grout incorporating different percentages of TOSW were evaluated. In addition, a model scale grouted helical pile with the green grout …
Str-973: Static Load Behaviour Of Hybrid Frp-Concrete Two-Panel Truss Girders Reinforced With Double-Headed Gfrp Bars,
2016
University of Calgary
Str-973: Static Load Behaviour Of Hybrid Frp-Concrete Two-Panel Truss Girders Reinforced With Double-Headed Gfrp Bars, Parham Joulani, Mamdouh El-Badry, Mohammad Moravvej
Canadian Society for Civil Engineering
The results of an experimental investigation into the behaviour of precast hybrid FRP-concrete, two-panel truss girders under static loading are presented. The investigation is part of a comprehensive research program on the development of a corrosion-free system for short and medium span bridges. The truss girders consist of pretensioned concrete chords connected by vertical and diagonal truss elements made of glass FRP tubes filled with concrete. The truss elements are reinforced and connected to the top and bottom chords by means of long double-headed steel or glass FRP bars. The top and bottom chords are also reinforced with glass FRP …
Str-988: Post-Fire Residual Strength Of Glass Fibre Reinforced Polymer (Gfrp) Bars,
2016
Queen’s University
Str-988: Post-Fire Residual Strength Of Glass Fibre Reinforced Polymer (Gfrp) Bars, Hamzeh Hajiloo, Mark F. Green
Canadian Society for Civil Engineering
Lack of reliable and adequate information on material characteristics of glass fibre reinforced polymer (GFRP) at elevated temperatures lowers the accuracy of analytical and design models developed to predict the behaviour of GFRP reinforced concrete members. There is an essential need to assess the remaining strength of bridge and building components after exposure to fire to determine if repair or replacement is required. This paper presents experimental results of a series of tensile tests on GFRP reinforcing bars after exposure to elevated temperatures. GFRP specimens with nominal diameter of 16 mm were exposed to different temperatures in an electric furnace. …
Str-978: A Hysteresis Model For The Piston-Based Self-Centering Bracing System Considering Residual Deformation,
2016
University of British Columbia
Str-978: A Hysteresis Model For The Piston-Based Self-Centering Bracing System Considering Residual Deformation, A. B. M. Haque Rafiqul, Siriwut Sasibut, Feng Rong, M. Shahria Alam
Canadian Society for Civil Engineering
A load deformation hysteresis model has been developed for the piston based self-centering (PBSC) bracing system. This bracing system utilizes shaft-piston mechanism for transferring load to its core energy dissipating elements, which are made of Nickel Titanium alloy (NiTinol) bars. These bars provide the brace its strength as well as the self-centering capability. Although in theory, the NiTinol based shape memory alloy bars are supposed to come back to their original shape after large nonlinear deformations, in reality, they experience residual deformation. The hysteresis models, which are currently available for capturing the behavior of self-centering systems, are known as flag …
Str-987: Analysis Of Rectangular Hollow Section Trusses With Overlapped K-Connections,
2016
University of Toronto
Str-987: Analysis Of Rectangular Hollow Section Trusses With Overlapped K-Connections, Kyle Tousignant, Jeffrey A. Packer
Canadian Society for Civil Engineering
A ten-metre span, simply-supported, overlap-jointed, rectangular hollow section (RHS) Warren truss was tested elastically by applying a single quasi-static point load to various chord panel points to obtain experimental axial force, bending moment, and truss deflection patterns. A total of 53 axial forces and bending moments were measured in the chord and web members during two tests, and deflections at panel points along the bottom chord were measured during a broader series of nine tests. The theoretical behaviour given by practical frame analysis models, consisting of: (i) all joints pinned and concentric; (ii) all joints rigid and concentric; (iii) pin-ended …
Str-992: Damage Detection Of Uhp-Frc Plates Using Random Decrement Technique,
2016
Ryerson University
Str-992: Damage Detection Of Uhp-Frc Plates Using Random Decrement Technique, Azita Pourrastegar, Hesham Othman, Hesham Marzouk
Canadian Society for Civil Engineering
This paper is about structural health monitoring using Random Decrement (RD) technique for Ultra High Performance Fiber Reinforced Concrete (UHP-FRC) slabs. Five simply supported slabs with identical dimensions are tested using low-velocity impact technique. Multi-impact load is applied at the mid-point of the UHP-FRC slabs by dropping a 475 kg steel weight from a constant height of 4.15 m. Two parameters are considered: namely: the steel reinforcement ratio, and the steel fiber volume content. The natural frequencies (eigenvalues) and corresponding mode shapes (eigenvectors) of tested plates are extracted numerically using linear perturbation analysis available in ABAQUS (Lanczos solver) to verify …
Str-993: Behaviour Of Fire-Damaged Engineered Timber Beams,
2016
Carleton University
Str-993: Behaviour Of Fire-Damaged Engineered Timber Beams, Hailey Quiquero, John Gales
Canadian Society for Civil Engineering
Recently in Canada, the national building code has been amended to include mid-rise engineered timber buildings. The code also contains an allowance for Alternative Solutions, in which taller and more complex engineered timber structures may be built with sufficient research and proof of performance. For sustainable material use in infrastructure, an environmentally conscious population is motivating the employment of new engineered timber constructions. The purpose of this study is to investigate the behaviour of timber members, specifically glulam, before and after fire damage to inform future testing of large-scale engineered timber building systems. The experiments provide valuable data with …
Str-997: Instrumentation And Long-Term Monitoring Of An Integral-Abutment Bridge Superstructure,
2016
University of New Brunswick
Str-997: Instrumentation And Long-Term Monitoring Of An Integral-Abutment Bridge Superstructure, Shelley A. Huntley, Arun J. Valsangkar
Canadian Society for Civil Engineering
Strain gauges were installed in the girders and deck of an integral abutment bridge to determine the behaviour of the superstructure to daily and seasonal thermal fluctuations. The two-span, 76 m-long bridge has no expansion joints; rather, the prestressed-concrete girders are cast directly into the abutments which are in turn supported by flexible pile foundations. Details of field instrumentation along with monitored data over a period of eight years are presented in this paper. Gauges measured the longitudinal strain in the girders and deck and were positioned at different elevations to provide a strain distribution across the superstructure depth. From …
Str-995: Calibration Of An Analytical Method For Vehicle-Induced Vibrations On Flexible Bridges,
2016
Rowan Williams Davies & Irwin Inc.
Str-995: Calibration Of An Analytical Method For Vehicle-Induced Vibrations On Flexible Bridges, Zachary J. Taylor, Pierre-Olivier Dallaire, Marco Accardo, Christian Mercier, Martin Talbot, Stoyan Stoyanoff
Canadian Society for Civil Engineering
The results of full scale trials of heavy vehicle-induced vibrations on the Pierre Laporte Bridge are presented. The Pierre Laporte Bridge spans approximately 1 km having the longest main span of any suspension bridge in Canada. The tests were performed during short periods of complete bridge closure on October 27 and 28, 2014. During the tests, the acceleration of the bridge was recorded at multiple locations in addition to measurements of the vertical and pitching accelerations of the testing vehicle itself. The results of these tests are used to calibrate an analytical tool developed to screen bridge designs for potential …
Str-996: Optimization For Bridge Type Selection Using Artificial Neural Networks,
2016
Concordia University
Str-996: Optimization For Bridge Type Selection Using Artificial Neural Networks, Elie M. Otayek, Ahmad Jrade
Canadian Society for Civil Engineering
Many Researchers have attempted to establish a methodology for the selection of bridge type in a systematic manner. Knowledge based systems (KBS) and other Expert Systems (ES) have been used for this purpose but they have some limitations and restrictions. This paper proposes a methodology to implement a Decision Support System (DSS) in an artificial intelligent environment that aims to suggest a bridge type with its main components at the conceptual design phase, based on the characteristics and performance of existing and similar bridges in order to predict the performance of proposed ones that have been analyzed by decision makers …
Str-994: Investigation Of L-Shaped Low-Rise And High-Rise Buildings Response To Nbcc 2005 And 2010 Seismic Loads,
2016
Western University
Str-994: Investigation Of L-Shaped Low-Rise And High-Rise Buildings Response To Nbcc 2005 And 2010 Seismic Loads, Ahmed Hamada, Ashraf A. El Damatty
Canadian Society for Civil Engineering
The current study builds on a previous study conducted by the authors that investigated the seismic provisions of the National Building Code of Canada (NBCC) 2005 and 2010, pertaining to the loading and analysis of irregular L-shaped buildings. The study uses low-rise and high-rise L-shaped buildings as case studies. Three-dimensional finite element models of the two irregular L-shaped buildings were developed and discussed in the previous study. The lateral resisting system of the low-rise buildings consists of concrete shear walls, while the high-rise building consists of a combination of concrete shear walls and concrete rigid frames. Low and high-rise concrete …
Str-991: Energy Harvesting Methods For Structural Health Monitoring Using Wireless Sensors: A Review,
2016
Concordia University
Str-991: Energy Harvesting Methods For Structural Health Monitoring Using Wireless Sensors: A Review, Srishti Banerji, Ashutosh Bagchi, Shervin Khazaeli
Canadian Society for Civil Engineering
Structural Health Monitoring (SHM) implies monitoring the performance of structures using sensors to get an advance warning of the loss of structural capacity or potential collapse. Wireless-sensor based monitoring system is found to be advantageous over traditional wire-based system because of their ease of implementation and maintenance. However, power supply is an important concern for wireless sensors used in monitoring of civil engineering structures. While there are different efficient power usage methods and power supply solutions available for wireless sensors, their applications to SHM systems for civil infrastructure are not standardized. Energy harvesting by means of converting energy from the …
