Reinforced concrete structural walls are commonly used for resisting lateral forces in buildings. Owing to the advancements in the field of concrete materials over the past few decades, concrete mixes of high compress...Reinforced concrete structural walls are commonly used for resisting lateral forces in buildings. Owing to the advancements in the field of concrete materials over the past few decades, concrete mixes of high compressive strength, commonly referred to as high-strength concrete (HSC), have been developed. In this study, the effects of strategic placement of HSC on the performance of slender walls were examined. The finite-element model of a conventional normal-strength concrete (NSC) prototype wall was validated using test data available in extant studies. HSC was incorporated in the boundary elements of the wall to compare its performance with that of the conventional wall at different axial loads. Potential reductions in the reinforcement area and size of the boundary elements were investigated. The HSC wall exhibited improved strength and stiffness, and thereby, allowed reduction in the longitudinal reinforcement area and size of the boundary elements for the same strength of the conventional wall. Cold joints resulting from dissimilar concrete pours in the web and boundary elements of the HSC wall were modeled and their impact on behavior of the wall was examined.展开更多
This paper studies the behavior of a reinforced concrete(RC)structural frame employing a tessellated structuralarchitectural(TeSA)shear wall as the lateral-load resisting element.TeSA walls are made of interlocking mo...This paper studies the behavior of a reinforced concrete(RC)structural frame employing a tessellated structuralarchitectural(TeSA)shear wall as the lateral-load resisting element.TeSA walls are made of interlocking modules(tiles)that provide easier repairability and replaceability.A nonlinearfinite element model of a TeSA wall with tiles interlocking in one direction(1-D interlocking)is validated using test data.An RC frame from a building is modeled with a 1-D interlocking TeSA shear wall.The effects of varying rigidity of the wall-frame connections(rigid,hinged,slotted)on the lateral strength of the system and the axial load demands of the gravity-load resisting systems are evaluated.Finally,the effect of connection details on the damage of the TeSA wall is also studied.The study shows that the lateral strength of the system is the highest with a rigid connection between the wall and the system,followed by the system with hinged connections.Slotted connections,which provided no vertical coupling between the wall and the frame result in the lowest lateral strength.TeSA wall experienced“slight damage”up to a drift ratio of 2%.The system with rigid connections between the wall and the frame experienced the most damage,followed by system with hinged and slotted connections.展开更多
基金financial support extended by the J.N.Tata Endowment,India,to the first author during the course of this study is highly appreciated.
文摘Reinforced concrete structural walls are commonly used for resisting lateral forces in buildings. Owing to the advancements in the field of concrete materials over the past few decades, concrete mixes of high compressive strength, commonly referred to as high-strength concrete (HSC), have been developed. In this study, the effects of strategic placement of HSC on the performance of slender walls were examined. The finite-element model of a conventional normal-strength concrete (NSC) prototype wall was validated using test data available in extant studies. HSC was incorporated in the boundary elements of the wall to compare its performance with that of the conventional wall at different axial loads. Potential reductions in the reinforcement area and size of the boundary elements were investigated. The HSC wall exhibited improved strength and stiffness, and thereby, allowed reduction in the longitudinal reinforcement area and size of the boundary elements for the same strength of the conventional wall. Cold joints resulting from dissimilar concrete pours in the web and boundary elements of the HSC wall were modeled and their impact on behavior of the wall was examined.
基金supported by the National Science Foundation under grant numbers 1762133 and 1762899Any opinions,findings,and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.
文摘This paper studies the behavior of a reinforced concrete(RC)structural frame employing a tessellated structuralarchitectural(TeSA)shear wall as the lateral-load resisting element.TeSA walls are made of interlocking modules(tiles)that provide easier repairability and replaceability.A nonlinearfinite element model of a TeSA wall with tiles interlocking in one direction(1-D interlocking)is validated using test data.An RC frame from a building is modeled with a 1-D interlocking TeSA shear wall.The effects of varying rigidity of the wall-frame connections(rigid,hinged,slotted)on the lateral strength of the system and the axial load demands of the gravity-load resisting systems are evaluated.Finally,the effect of connection details on the damage of the TeSA wall is also studied.The study shows that the lateral strength of the system is the highest with a rigid connection between the wall and the system,followed by the system with hinged connections.Slotted connections,which provided no vertical coupling between the wall and the frame result in the lowest lateral strength.TeSA wall experienced“slight damage”up to a drift ratio of 2%.The system with rigid connections between the wall and the frame experienced the most damage,followed by system with hinged and slotted connections.
