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Showing 1 to 17 of 17 for “"Reversed Cyclic"”.
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Fatigue behavior of notched carbon epoxy laminates during reversed cyclic loads
… notched graphite epoxy laminates during fulIy-reversed cyclic loads. Two material systems, AS4/3501-6 and AS4/1808, two lamination arrangements, (0,45,90,-45)<sub>s</sub>₄ and (0,45,0,-45)<sub>s</sub>₄, and two notch configurations, central hole and opposing semi-circular edge notches, were …
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Behavior of Deep Reinforced Concrete Beams under Monotonic and Reversed Cyclic Load
… non-slender beams under monotonic and reversed cyclic loads, as particular consideration is given to the load-bearing mechanisms which occur in moderately-deep beams. The choice of this topic was motivated in part by verification studies which show that the current code procedures for …
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Damping and flexural properties of prestressed concrete members subjected to reversed cyclic loading
… of structural damping. Part two describes the reversed cyclic testing of prestressed concrete members: end moments were applied to the members to simulate earthquake loading, and measurements were made of stiffness and damping energy. An analytical method of obtaining moment - rotation curves …
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Concrete columns and beams reinforced with FRP bars and grids under monotonic and reversed cyclic loading
… cantilever beams subjected lateral monotonic or cyclic loading. The results of tests conducted at the Structures Laboratory of the University of Ottawa indicate that CFRP reinforcement can be used effectively in new concrete members. CFRP reinforced columns subjected to eccentric loading were …
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ANCHORAGE OF HEADED REINFORCING BARS IN CONCRETE
… and seven knee beam-column joints subjected to reversed cyclic loading. The headed bars in the column-foundation joint specimens had net bearing areas ranging from 4 to 15 times the area of the bar Ab; some of the headed bars contained large obstructions adjacent to the bearing face of the head …
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Modelling of debonding mechanisms in externally bonded FRP sheets in RC shear walls for earthquake resistance
… with externally boned FRP sheets under the reversed cyclic loading of earthquakes. The proposed computer model can accurately simulate the IC debonding mechanism under the two-dimensional stress state of the wall panel and the subsequent ductile flexural or brittle shear failure modes of …
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Seismic Behaviour of Grouted Connections in Precast Concrete Panels
… connections. This testing comprised of seven reversed cyclic in-plane tests of fullscale precast concrete wall panels having wall-to-foundation grouted metal duct connections. Walls with existing connection detailing were found to perform adequately when carrying low axial loads, but …
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Fatigue behavior of ceramic matrix composites at elevated temperatures under cyclic loading
… matrix. composites at 1800 of under fully reversed cyclic loading. Notch effect on quasi-static tensile response is also considered. Quasi-static and fatigue damage mechanisms and failure modes are examined using various specimen geometries, load levels, fatigue ratios, and laminates …
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Performance of Pressure Sensitive Adhesive Tapes In Wood Light-Frame Shear Walls
… A total of 287 monotonic connection tests and 23 reversed cyclic wall tests were performed to achieve these objectives. Connection tests were performed in accordance with ASTM D 1761-88 (2000), and walls were tested using the CUREE (Consortium of Universities for Earthquake Engineering) general …
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Performance Assessment of Shear-critical Reinforced Concrete Plane Frames
… conditions including the special cases of cyclic and reversed-cyclic loading, and further development of the procedure for dynamic loading conditions including time-varying base accelerations, impulse, impact and blast forces, initial mass velocities, and constant mass accelerations. Each …
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Effects of Alkali-Silica Reaction on Response of Concrete Squat Shear Walls
… These walls were tested in three stages under reversed cyclic lateral loads while at the same time subjected to constant axial load simulating earthquake loads. Small companion specimens revealed that ASR caused free expan¬sion of approximately 0.23%. While concrete gained compressive strength …
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Performance Capabilities of Light-Frame Shear Walls Sheathed With Long OSB Panels
… feet (2.4, 2.7 and 3.0 m) were subjected to the reversed, cyclic loading schedule of the standard CUREE protocol in order to determine the performance capabilities of shear walls greater than 8 feet (2.4 m) in height sheathed with long panels. Of the thirty-six walls, a total of twelve walls …
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Diagonally-Reinforced Concrete Coupling Beams with High-Strength Steel Bars
… ratios of 1.9 were tested under fully reversed cyclic loads. The primary variables were yield stress of the diagonal reinforcement (60 and 120 ksi [420 and 830 MPa]), target beam shear stress (10 and 15√(f_c^' ) psi [0.83 and 1.25√(f_c^' ) MPa]), length of the secondary (non-diagonal) …
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Seismic Behavior of Simcon-Jacketed High Strength Lightweight Aggregate Fiber Reinforced Concrete Filled Steel Tube Column Members
… filled steel tube column was tested under static-reversed cyclic loading. A cantilever type setup was used in this investigation and the column specimen was tested in pure bending. Ductility, stiffness degradation, energy dissipation, work index, damage index and hysteretic damping ratio were …
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Experimental and Analytical Evaluation of FRP-Retrofitted Reinforced Concrete Diaphragms for In-Plane Shear Strengthening
… specimens subject to a displacement controlled reversed cyclic loading protocol at the free end. The diaphragm specimens were designed to represent the diaphragm shear zone adjacent to a shear wall, a typical location of high in-plane shear demand. Seven specimens were strengthened with FRP, …
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Analysis and Design of Fiber Reinforced Polymer Retrofit of Reinforced Concrete Diaphragms
… real-world discontinuities was tested under reversed-cyclic four-point loading. Externally bonded FRP, strategically placed to address critical load-path disruptions, significantly enhanced the shear capacity, informing preliminary design approach for practical diaphragm retrofitting. The …
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Self-healing strain-hardening cementitious composites (SH2CC) for cyclic loading environments
Cyclic loading is ubiquitous and frequently encountered in various infrastructure. However, the widely used construction material, concrete, is inherently brittle and could be poor at sustaining cyclic stress (especially those involving tensile stress). Although reinforcement can help avoid …