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Full-Text Articles in Engineering
Str-823: Flexural Behaviour And Bond-Dependent Coefficient Of Basalt Frp Bars In Concrete Beams, Fareed Elgabbas, Ehab Ahmed, Brahim Benmokrane
Str-823: Flexural Behaviour And Bond-Dependent Coefficient Of Basalt Frp Bars In Concrete Beams, Fareed Elgabbas, Ehab Ahmed, Brahim Benmokrane
Canadian Society for Civil Engineering
This paper presents an experimental study aimed at determining the bond-dependent coefficient (kb) and investigating the flexural performance of concrete beams reinforced with ribbed basalt fiber-reinforced polymer (BFRP) bars. The performance of the BFRP-RC concrete beams is compared against that of GFRP-RC ones. A total of five concrete beams measured 200 mm wide × 300 mm deep × 3100 mm long were constructed and tested in four-point bending over a clear span of 2700 mm. The main variables were reinforcement type (BFRP, GFRP, and steel bars as reference) and reinforcement ratio. The test results showed that the average kb was …
Str-818: The Effect Of Relaxation On The Slip Resistance Of Metallized Faying Surfaces In Slip-Critical Connections, Maxime Ampleman, Charles-Darwin Annan, Mario Fafard, Éric Lévesque
Str-818: The Effect Of Relaxation On The Slip Resistance Of Metallized Faying Surfaces In Slip-Critical Connections, Maxime Ampleman, Charles-Darwin Annan, Mario Fafard, Éric Lévesque
Canadian Society for Civil Engineering
Metallizing has emerged as an effective protective coating for steel bridge members, providing a physical barrier and a galvanic protection. Recent research has shown that metallized faying surfaces used in high strength bolted connections provide higher slip resistance than specified values for uncoated blast-cleaned faying surfaces in North American design standards. As a particularity, relaxation of the clamping force is observed in the slip-critical connections with metallized faying surfaces. In this study, tests were designed to evaluate the effect of relaxation on the slip resistance of metallized faying surfaces in high strength bolted connections. Some design parameters included in this …
Str-828: Behavior Of Circular Frp-Reinforced Concrete Columns Under Eccentric Loading, Abdeldayem Hadhood, Hamdy M. Mohamed, Brahim Benmokrane
Str-828: Behavior Of Circular Frp-Reinforced Concrete Columns Under Eccentric Loading, Abdeldayem Hadhood, Hamdy M. Mohamed, Brahim Benmokrane
Canadian Society for Civil Engineering
This paper presents the results of an investigation of the eccentric compression behavior of three full-scale circular concrete columns reinforced with the glass-fiber-reinforced polymer (GFRP) bars and spirals. The column specimens measured 1500 mm height, 305 mm diameter and were tested under monotonic eccentric loading. The main variable was the eccentricity-to-dimeter ratio. Three values were considered in this study (8.20%, 16.39%, and 65.57%). The failure mechanism was changeable according to the level of the applied eccentricity. The failure mechanism of columns at small eccentric loading was defined as compression-controlled due to concrete crushing. At high eccentric loading, the failure of …
Str-824: Fatigue Behavior Of Concrete Underground Chambers Reinforced With Gfrp Bars, Michaël Guérin, Hamdy M. Mohamed, Brahim Benmokrane
Str-824: Fatigue Behavior Of Concrete Underground Chambers Reinforced With Gfrp Bars, Michaël Guérin, Hamdy M. Mohamed, Brahim Benmokrane
Canadian Society for Civil Engineering
Precast underground concrete chambers reinforced with steel bars are used frequently in construction and electrical industry for housing power cables and transformers. In Quebec, more than 30,000 of these chambers have been installed by Hydro-Quebec during the last 30 years. However, like other conventionally reinforced concrete structures, corrosion of steel reinforcement constitutes the major cause of chambers deterioration, leading to costly repairs and rehabilitation as well as a significant reduction in service life. This paper presents experimental data on the fatigue and static behavior of full-scale underground concrete chamber reinforced totally with glass fiber-reinforced polymer (GFRP) bars. The chamber measure …
Str-832: Ultimate Flexural Strength And Long-Term Creep Deflection For Structural Insulated Foam-Timber Sandwich Panels, Mahmoud Sayed-Ahmed, Khaled Sennah, Ahmed Diab, Sherif Mansour
Str-832: Ultimate Flexural Strength And Long-Term Creep Deflection For Structural Insulated Foam-Timber Sandwich Panels, Mahmoud Sayed-Ahmed, Khaled Sennah, Ahmed Diab, Sherif Mansour
Canadian Society for Civil Engineering
The structural insulated panel (SIP) is a sandwich structured composite that is prefabricated by attaching a lightweight thick core made of Expanded Polystyrene (EPS) foam laminated between two thin, and stiff face skins made of Oriented Strand Board (OSB). The use of sandwich panels provides key benefits over conventional materials including: very low weight; high stiffness; durability and; production and construction cost savings. The facing skins of the sandwich panel can be considered as the flanges for the I-beam carrying bending stresses in which one face skin is subjected to tension, and the other is in compression. The core resists …
Str-830: Enhancing The Deformation Capacity Of Concrete Shear Walls Reinforced With Gfrp Bars, Ahmed Hassanein, Nayera Mohamed, Ahmed Sabry Farghaly, Brahim Benmokrane
Str-830: Enhancing The Deformation Capacity Of Concrete Shear Walls Reinforced With Gfrp Bars, Ahmed Hassanein, Nayera Mohamed, Ahmed Sabry Farghaly, Brahim Benmokrane
Canadian Society for Civil Engineering
An experimental study was recently conducted to address the applicability of concrete shear walls entirely reinforced with glass-fiber-reinforced polymer (GFRP) bars and subjected to quasi-static reversed cyclic lateral loading in attaining reasonable strength and drift requirements specified in different codes. The reported test results clearly show that properly designed and detailed GFRP-reinforced concrete (RC) walls could reach their flexural capacities with no strength degradation. The results also demonstrate that the tested walls were able to achieve recoverable and self-centering behavior up to allowable drift limits before experiencing moderate damage and attain a maximum drift comparable to steel-RC walls. The promising …
Str-827: Shear Strength Of Circular Concrete Beams Reinforced With Gfrp Bars, Ahmed H. Ali, Hamdy M. Mohamed, Brahim Benmokrane
Str-827: Shear Strength Of Circular Concrete Beams Reinforced With Gfrp Bars, Ahmed H. Ali, Hamdy M. Mohamed, Brahim Benmokrane
Canadian Society for Civil Engineering
This paper presents the results of an investigation of the shear strength and behavior of three circular concrete beams reinforced with glass-FRP (GFRP) bars and spirals. The beams, which measured 3,000 mm in length by 500 mm in diameter, were tested under four-point bending. The test parameters included the GFRP-spiral-reinforcement ratio (different spiral spacings [150 and 200 mm] and spiral diameters [13 and 15 mm]). As designed, the beams failed in shear due to GFRP-spiral rupture. The test results indicated that the higher the GFRP spiral reinforcement ratio, the higher the enhancement of the shear strength due to the confinement, …
Str-831: Fatigue Strength Of Angle-Shaped Transverse Connection For Gfrp-Reinforced Precast Full-Depth Deck Panels In Accelerated Bridge Construction, Mahmoud Sayed-Ahmed, Khaled Sennah
Str-831: Fatigue Strength Of Angle-Shaped Transverse Connection For Gfrp-Reinforced Precast Full-Depth Deck Panels In Accelerated Bridge Construction, Mahmoud Sayed-Ahmed, Khaled Sennah
Canadian Society for Civil Engineering
Prefabricated bridges elements and systems (PBES) are subjected to repeated truck loads while being exposed to weather conditions. Fatigue of the structural elements and corrosion of the reinforcement are the main reasons for bridge deterioration. This research investigates the fatigue strength of full-depth deck panels (FDDP) resting over steel cross-braced girders and reinforced with ribbed-surface, high-modulus (HM), glass fiber reinforced polymer (GFRP) bars. The precast FDDP has transverse panel-to-panel connection of angle-shape with female shear key, and panel-to-girder connection of V-shape, where both connections are filled with ultra-high performance fiber reinforced concrete (UHPFRC). Two different fatigue loading were conducted to …
Str-829: Behavior Of Gfrp-Reinforced Concrete Squat Walls Under Simulated Earthquake Loading, Ahmed Arafa, Ahmed Sabry Farghaly, Brahim Benmokrane
Str-829: Behavior Of Gfrp-Reinforced Concrete Squat Walls Under Simulated Earthquake Loading, Ahmed Arafa, Ahmed Sabry Farghaly, Brahim Benmokrane
Canadian Society for Civil Engineering
Steel-reinforced squat walls are used as the main component for earthquake resistance in low-rise structures. Deterioration due to corrosion of steel reinforcement is one of the major challenges facing the construction industry. Furthermore, given the low aspect ratio of squat walls, their behavior is dominated by inelastic shear deformations activated by the yielding of flexural reinforcement. These deformations degrade strength and stiffness with subsequent shear failure, preventing the wall from achieving its flexural capacity, which is a prerequisite for adequate seismic design. Using noncorrodible glass-fiber-reinforced-polymer (GFRP) bars represents an effective method for overcoming corrosion problems. In addition, the available experimental …
Str-833: Evaluation Of The Contribution Of Panel Zones To The Global Performance Of Moment Resisting Frames Under Seismic Load, Paul Steneker, Lydell D. A. Wiebe
Str-833: Evaluation Of The Contribution Of Panel Zones To The Global Performance Of Moment Resisting Frames Under Seismic Load, Paul Steneker, Lydell D. A. Wiebe
Canadian Society for Civil Engineering
Before the 1994 Northridge Earthquake, the seismic design strategy for moment resisting frames considered the yielding of the panel zone when calculating the required level of ductility. Following the unacceptable performance of conventional moment resisting frame (MRF) connection details during the Northridge seismic event, prequalified connections were developed to concentrate beam yielding away from the column face, preserving the connection. With these new connection strategies, the panel zone deformation may not contribute as significantly to the overall behaviour of an MRF. Therefore, considering the increased use of advanced dynamic modeling techniques, it is important for both designers and researchers to …
Str-839: Addressing The Issues Of Modal Identification Using Tensor Decomposition, Peter W. Friesen, Ayan Sadhu
Str-839: Addressing The Issues Of Modal Identification Using Tensor Decomposition, Peter W. Friesen, Ayan Sadhu
Canadian Society for Civil Engineering
Modal identification has been an indispensable tool for condition assessment of critical civil infrastructure. Recently several signal processing techniques including time-frequency analysis have shown significant success in addressing wide range of challenges in modal identification of flexible structures. In a parallel development, tensor decomposition is explored as an attractive and versatile system identification tool that can use even a limited number of vibration sensors to estimate the modal parameters under ambient excitations. In this paper, the performance of tensor decomposition is evaluated for modal identification of a building model under a multitude of earthquake excitations.
Str-840: Investigation Of Live Load Moment And Shear For The Design Of Bridge Deck Slab Cantilevers With Unstiffened Edge Or Built With Tl-5 Barrier Wall, Ivan Micovic, Khaled Sennah
Str-840: Investigation Of Live Load Moment And Shear For The Design Of Bridge Deck Slab Cantilevers With Unstiffened Edge Or Built With Tl-5 Barrier Wall, Ivan Micovic, Khaled Sennah
Canadian Society for Civil Engineering
This study builds on the methods of analyses with respect to cantilever slabs in the Canadian Highway Bridge Design Code (CHBDC), and recommends new simplified equations for the intensity of the transverse moment and shear force at the base of the cantilever overhang due to applied vertical truck loading. A parametric study was conducted using finite-element modelling on bridge deck cantilevers with variable lengths and slab thicknesses. Different end stiffening arrangements were considered, including the presence of PL-3 barriers walls (recently renamed to TL-5) as well as the concrete curb supporting intermittent steel posts carrying the bridge railing. The barrier …
Str-834: Seismic Performance Of Modular Steel Frames Equipped With Shape Memory Alloy Braces, Papia Sultana, Maged A. Youssef
Str-834: Seismic Performance Of Modular Steel Frames Equipped With Shape Memory Alloy Braces, Papia Sultana, Maged A. Youssef
Canadian Society for Civil Engineering
Modular steel buildings (MSBs) are widely used for one to six storey schools, apartments, and similar buildings, where repetitive units are required. Modular units are first built and finished under a controlled manufacturing environment. They are then transported to the building site, where they are connected horizontally and vertically. The lateral load resisting system for MSBs usually relies on steel braced frames, which dissipate the seismic energy through steel yielding. This behaviour leads to residual drifts complicating the repair of seismically damaged buildings or rendering them as irreparable. Systems that can minimize the seismic residual drifts are thus needed. Superelastic …
Str-837: Punching Shear Behaviour Of High Strength Concrete Slab-Column Connections Reinforced With Gfrp Bars, Ahmed M. Hussein, Ehab El-Salakawy
Str-837: Punching Shear Behaviour Of High Strength Concrete Slab-Column Connections Reinforced With Gfrp Bars, Ahmed M. Hussein, Ehab El-Salakawy
Canadian Society for Civil Engineering
The catastrophic nature of punching shear failure exhibited by flat plate system requires a great attention and robust predictions of the behaviour of slab-column connections. This paper presents an experimental study carried out to investigate the punching shear behaviour of fibre-reinforced polymer (FRP) reinforced concrete (RC) interior slab-column connections made of high strength concrete (HSC). Three full-scale HSC specimens were constructed and tested up to failure. The three connections were reinforced with GFRP sand-coated bars with reinforcement ratios of 1.0, 1.5 and 2.0% without any shear reinforcement. The typical dimensions of the test specimens were 2800 × 2800 × 200 …
Str-836: State-Of-The-Art In Near-Field And Contact Explosion Effects On Reinforced Concrete Columns, Alok Dua, Abass Braimah
Str-836: State-Of-The-Art In Near-Field And Contact Explosion Effects On Reinforced Concrete Columns, Alok Dua, Abass Braimah
Canadian Society for Civil Engineering
Blast loads are categorized as far-field and near-field loads in terms of the scaled distance. Far-field and near-field loading are associated with explosions that occur at scaled distances of more than or less than 1.18 m/kg1/3, respectively. The blast waves from a far-field explosion arrive simultaneously at and exert uniformly distributed pressure on a target. Response computations can be performed using the semi-empirical relations (charts) presented in UFC-3-340 design manual, ConWep program or high fidelity physics based commercial software like LS-DYNA, AUTODYN, and ABAQUS. On the other hand, for near-field blasts, the interaction between blast waves and structures is more …
Str-843: Caractérisation De La Maçonnerie De Pierres Pour L’Évaluation Sismique De Bâtiments Patrimoniaux, Pascal Moretti, Marie-José Nollet, Ahmad Abo El Ezz
Str-843: Caractérisation De La Maçonnerie De Pierres Pour L’Évaluation Sismique De Bâtiments Patrimoniaux, Pascal Moretti, Marie-José Nollet, Ahmad Abo El Ezz
Canadian Society for Civil Engineering
L’évaluation de la résistance sismique des bâtiments patrimoniaux en maçonnerie de pierres non armée (MNA) est la première étape nécessaire à l’évaluation du risque sismique associé et l'élaboration d'une stratégie de réhabilitation optimale tout en conservant les caractéristiques de l'architecture d'origine. L’évaluation de la résistance latérale des murs en MNA est complexifiée par le fait qu’ils sont souvent composés de deux ou trois parois de matériaux aux propriétés variables, et leur résistance aux charges sismiques est compromise par la dégradation des joints de mortier. Dans l'Est du Canada, les caractéristiques des murs porteurs des bâtiments patrimoniaux, telles que leur composition, …
Str-844: Cover Crack Growth Monitoring In Rc Structures Subjected To Corrosion With Acoustic Emission Sensors, Ahmed A. Abouhussien, Assem A. A. Hassan
Str-844: Cover Crack Growth Monitoring In Rc Structures Subjected To Corrosion With Acoustic Emission Sensors, Ahmed A. Abouhussien, Assem A. A. Hassan
Canadian Society for Civil Engineering
This paper investigates the feasibility of applying acoustic emission (AE) monitoring to evaluate the cover cracking caused by reinforcing steel corrosion in concrete structures. Ten small-scale reinforced concrete prism samples were continuously monitored using attached AE sensors as being exposed to accelerated corrosion tests. The samples had a constant concrete cover (40 mm) around one embedded steel bar and were corroded to reach five percentages of steel mass loss: 1%, 2%, 3%, 4%, and 5%. Several AE signal parameters including number of hits, signal strength, energy, amplitude, and peak frequency were acquired during the tests. The AE signal strength data …
Str-845: Condition Assessment Of Corroded Reinforcement Bond To Concrete By Acoustic Emission Monitoring, Ahmed A. Abouhussien, Assem A. A. Hassan
Str-845: Condition Assessment Of Corroded Reinforcement Bond To Concrete By Acoustic Emission Monitoring, Ahmed A. Abouhussien, Assem A. A. Hassan
Canadian Society for Civil Engineering
In this paper, acoustic emission (AE) monitoring was used to evaluate the bond behaviour of corroded reinforcement in reinforced concrete prism samples. The embedded reinforcing steel bars were pre-corroded to successive levels of corrosion up to 5% mass loss of steel by impressed current accelerated corrosion process. A total of 24 samples with variable bar embedded length (50 and 200 mm) and corrosion exposure (0%, 1%, 2%, 3%, 4%, and 5% of steel mass loss) were tested under pull-out tests. Two attached AE sensors were mounted at the surface of each specimen to continuously record the emitted AE signals throughout …
Str-846: Methods Of Comparing Extreme Load Effects Based On Weigh-In-Motion Data, Kien Doan, Bruce F. Sparling, Lisa R. Feldman
Str-846: Methods Of Comparing Extreme Load Effects Based On Weigh-In-Motion Data, Kien Doan, Bruce F. Sparling, Lisa R. Feldman
Canadian Society for Civil Engineering
The estimation of extreme load effects caused by vehicles is of critical importance in the evaluation and design of bridge structures. Two methods for estimating extreme load effects over the service life of bridges are commonly cited in literature: (1) the use of a fitted probability distribution based on statistical data to extrapolate the extreme load effects on a probability plot, or (2) the application of Monte Carlo simulation to generate representative truck data over a bridge’s lifespan such that maximum load effect values can then be determined directly. In this paper, results obtained using the two aforementioned methods are …
Str-847: Westminster Drive Underpass – Accelerated Bridge Construction Using Gigo (Get In-Get Out) Bridge Concept, Mark D’Andrea, Wade Young, Andrew Turnbull
Str-847: Westminster Drive Underpass – Accelerated Bridge Construction Using Gigo (Get In-Get Out) Bridge Concept, Mark D’Andrea, Wade Young, Andrew Turnbull
Canadian Society for Civil Engineering
The Ministry of Transportation Ontario (MTO), in partnership with consultants and contractors, developed a method for accelerated bridge construction called Get in-Get out Bridge or GiGo Bridge. The GiGo Bridge concept is an Accelerated Bridge Construction (ABC) technique for replacing bridges over freeways, in 45 days or less, with a full closure of the crossing road. The concept requires that bridge components be prefabricated in advance of the on-site work. This has the advantage of shifting a substantial portion of the work into the winter months, freeing up staff resources and equipment for the summer months. Additional benefits of GiGo …
Str-849: From Experimental Wind Tunnel To Wind-Structure Interaction Simulations Of A Shell Structure, Ahmed A. K. A. Abodonya, Hosam Alsofi, Roland Wüchner, Kai-Uwe Bletzinger
Str-849: From Experimental Wind Tunnel To Wind-Structure Interaction Simulations Of A Shell Structure, Ahmed A. K. A. Abodonya, Hosam Alsofi, Roland Wüchner, Kai-Uwe Bletzinger
Canadian Society for Civil Engineering
This paper studies the transition from downscaled wind tunnel testing to prototype scale numerical simulations. The study is performed using OpenFOAM as fluid solver, EMPIRE as coupling tool, and Carat++ as the structure solver. The current work aims at finding sufficient settings for wind-structure interaction simulations. Also, the efficiency of the software chain to simulate natural wind flow is approved. For this purpose, different flow conditions such as uniform, atmospheric boundary layer (ABL), and flow behind a cube (structure is positioned in the wake region behind a cube) are simulated. These complicated, unsteady, and recirculating flows are simulated to study …
Str-852: Performance Assessment Of Three-Story Shape Memory Alloy Reinforced Concrete Walls, Emad A. Abraik, Maged A. Youssef
Str-852: Performance Assessment Of Three-Story Shape Memory Alloy Reinforced Concrete Walls, Emad A. Abraik, Maged A. Youssef
Canadian Society for Civil Engineering
The need for sustainable structures, that provide adequate ductility without experiencing major damage, has led researchers to develop methods to achieve self-centering structures. One of these methods involves the use of superelastic Shape Memory Alloy (SMA) bars. This study assesses the seismic performance of a three-story SMA Reinforced Concrete (RC) shear wall considering different potential locations for the SMA bars. The maximum inter-story drift, residual drift, and damage scheme are evaluated using Incremental Dynamic Analysis (IDA). The use of SMA bars at the plastic hinge of the first floor was found to significantly reduce the residual drifts and associated damage.
Str-850: Numerical Modelling Of Reinforced Concrete Block Structural Wall Buildings Under Seismic Loading, Mohamed Ezzeldin, Lydell D. A. Wiebe, Wael El-Dakhakhni
Str-850: Numerical Modelling Of Reinforced Concrete Block Structural Wall Buildings Under Seismic Loading, Mohamed Ezzeldin, Lydell D. A. Wiebe, Wael El-Dakhakhni
Canadian Society for Civil Engineering
With the recent shift of design code developers’ focus from component- to system-level assessment of seismic force resisting systems, there is a need to numerically assess the performance of whole buildings. However, reinforced concrete block structural wall buildings are complex structural systems composed of materials with nonlinear and heterogeneous properties, which makes the numerical investigation challenging, especially when seismic behavior is considered. Most previous numerical models of reinforced concrete block walls have considered individual components, rather than the complete building system, and have used relatively complex micro-models. In this paper, OpenSees (Open System for Earthquake Engineering Simulation) is used to …
Str-854: Multifunctional And Multiphysics Materials As Load-Bearing Structural Components, Abdolhamid Akbarzadeh Shafaroudi, Sara Rankohi
Str-854: Multifunctional And Multiphysics Materials As Load-Bearing Structural Components, Abdolhamid Akbarzadeh Shafaroudi, Sara Rankohi
Canadian Society for Civil Engineering
Multifunctional and multiphysics cellular solids are introduced in this paper as load-bearing structural components. Cellular solids offer a robust low-mass alternative for applications requiring lightweight and stiff components. The unique properties of cellular solids are achieved through cell geometry, connectivity, relative density, and properties of constituent materials. Inspired by biological systems, smart cellular solids can integrate low-mass, sensing/actuating, and self-healing properties into structural components. Discrete fabrication, by integrating patches of smart/active materials onto cellular solids, and continuous fabrication, using additive manufacturing, are two fabrication techniques for the manufacturing of multifunctional cellular solids. We propose a multiscale methodology for the analysis …
Str-862: Application Of 4d And 5d Bim In Cold-Formed Steel Residential Buildings, Metwally Abu-Hamd, Dina A. Saad, Mohamed Masoud
Str-862: Application Of 4d And 5d Bim In Cold-Formed Steel Residential Buildings, Metwally Abu-Hamd, Dina A. Saad, Mohamed Masoud
Canadian Society for Civil Engineering
Traditional residential building systems are not sufficient to produce the required number of housing units needed every year to solve the current housing problem in many countries. To meet such a challenge, it is necessary to explore the latest construction technologies, and to create innovative building systems that have the potential to bring high-performance affordable housing within reach of new markets. Light (cold-formed) steel (CFS) framing systems have proven to be a worthy alternative to traditional systems. Recent advances in the application of Building Information Modeling (BIM) into the Architecture-Engineering-Construction industries present an additional mean to further enhance the efficiency …
Str-855: Instantaneous Deflections Of Concrete Slabs Computed Using Discretized Analysis, Caitlin Mancuso, F. Michael Bartlett
Str-855: Instantaneous Deflections Of Concrete Slabs Computed Using Discretized Analysis, Caitlin Mancuso, F. Michael Bartlett
Canadian Society for Civil Engineering
Excessive deflection of concrete floor slabs is a recurring serviceability problem (Gilbert 2012, Stivaros 2012). Current practice is to compute deflections using either a single-element idealization, where an average effective moment of inertia is assigned to the entire member, or a discretized analysis, where the member is idealized as discrete elements with unique effective moments of inertia. There are two equations available for calculating the effective moment of inertia, developed by Branson (1965) and by Bischoff (2005). Branson originally proposed two equations for effective moment of inertia, a 3rd-power equation for use in a single-element idealization and a 4th-power equation …
Str-860: Cost Analysis Of Conical Tanks; Comparison Between Reinforced Concrete And Steel, Tareq M. Azabi, Ayman M. El Ansary, Ashraf A. El Damatty
Str-860: Cost Analysis Of Conical Tanks; Comparison Between Reinforced Concrete And Steel, Tareq M. Azabi, Ayman M. El Ansary, Ashraf A. El Damatty
Canadian Society for Civil Engineering
This paper provides a cost analysis case study to compare the effectiveness of using reinforced concrete versus steel as a construction material for conical tanks. Simplified design approaches, which were developed in previous investigations, are utilized to design a wide range of reinforced concrete conical tanks and steel counterparts having three different capacities (500 m3, 1750 m3 and 3000 m3). The cost analysis is conducted for each of the concrete and steel tanks. This analysis includes the cost of material, formwork, labour and life-cycle cost. Also, a general study of the effect of tank dimensions on the cost is provided. …
Str-863: Development Of A Novel Replaceable Connection For Seismically Designed Steel Concentrically Braced Frames, Daniel Stevens, Lydell D. A. Wiebe
Str-863: Development Of A Novel Replaceable Connection For Seismically Designed Steel Concentrically Braced Frames, Daniel Stevens, Lydell D. A. Wiebe
Canadian Society for Civil Engineering
There is increasing demand, from both engineers and their clients, for structures that can be rapidly returned to occupancy following an earthquake, while also maintaining or reducing initial costs. One possible way towards this goal is to ensure that seismic damage occurs only within elements that can be removed and replaced following a damaging earthquake. For concentrically braced frames that use hollow structural sections, the current design practice requires field welding of the brace to the gusset in a way that causes the brace to buckle out-of-plane. In the event of a damaging earthquake, the out-of-plane brace buckling may damage …
Str-864: Proposed Strut-And-Tie Model For Concrete Deep Beams Reinforced With Frp Bars, Khaled Mohamed, Ahmed Sabry Farghaly, Brahim Benmokrane
Str-864: Proposed Strut-And-Tie Model For Concrete Deep Beams Reinforced With Frp Bars, Khaled Mohamed, Ahmed Sabry Farghaly, Brahim Benmokrane
Canadian Society for Civil Engineering
A compiled database of 53 tests of FRP-reinforced concrete deep beams with shear span–depth ratios of less than two was used to evaluate the strut-and-tie models (STM) provided in ACI 318 (2014), CSA S806 (2012), CEB-fib (1999), and JSCE (2007). All provisions were found to be inadequate in calculating the capacity of FRP-reinforced deep beams due to inherent shortcomings in each provision. Hence, a new STM-based procedure for FRP-reinforced deep beams was proposed. The new model incorporates the effect of shear span–depth ratio (a/d), concrete compressive strength (fc’), and tensile strain in the adjoining tie (ε1). The contribution of …
Str-866: Non Linear Finite Element Model For Post-Earthquake Fire Performance Evaluation Of Steel Portal Frames, Amit Chandra, Anjan Bhowmick, Ashutosh Bagchi
Str-866: Non Linear Finite Element Model For Post-Earthquake Fire Performance Evaluation Of Steel Portal Frames, Amit Chandra, Anjan Bhowmick, Ashutosh Bagchi
Canadian Society for Civil Engineering
Post-earthquake fires (PEF) especially in densely populated urban areas have been catastrophic in recent seismic events. It appears to be an important design load which has not been considered critical by most design standards. Moreover, current performance-based seismic design philosophy permits certain level of damage to a structure based on the assumed design seismic hazard. These damaged structures are extremely vulnerable to post-earthquake fires. Even after the outbreak of fire, the structural integrity of the damaged structure must be intact for sufficient duration enabling the firefighters to evacuate and extinguish the fire in the affected building. The recent performance-based design, …