Consideration of Shear Behavior in Macromodeling of Deep Reinforced Concrete Members
Publication: Journal of Structural Engineering
Volume 149, Issue 5
Abstract
Deep members can exist in different forms in concrete structures, such as coupling beams, short columns, pile caps, and corbels. Because they are typically prone to shear failure, accurate calculation of the shear behavior in these members is vital. The existing analysis procedures for deep members are either computationally expensive or limited to the calculation of shear strength for design purposes. There is a great need for reliable macromodeling analysis tools that can evaluate safety and performance of structures at the system level while considering the nonlinear shear behavior of deep members in detail. This paper presents a shear plastic hinge model developed based on the beam-arch action mechanism for nonlinear analysis of deep RC members. The contribution of web concrete and transverse reinforcement (i.e., beam action) to the shear response is considered based on the modified compression field theory, while the contribution of the inclined concrete compression chord (i.e., arch action) is taken into account using the compatibility condition for shear deformations. The model is capable of calculating the shear force and shear deformation at different stages of the response while considering important nonlinear material effects in RC and interactions between internal force components. Through a comprehensive verification and parametric study, it is demonstrated that the model is able to accurately compute the shear behavior in deep RC beams and columns with various design variables. Last, the effectiveness of the proposed model for system-level analysis of structures is evaluated by modeling a multistory RC shear wall with coupling beams. The analysis results show that shear deformations can have a great influence on the performance of the structure as a whole in addition to the behavior at the component level.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request. This includes additional information or more details about the OpenSees and VecTor2 models.
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Published In
Journal of Structural Engineering
Volume 149 • Issue 5 • May 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Mar 8, 2022
Accepted: Dec 29, 2022
Published online: Feb 27, 2023
Published in print: May 1, 2023
Discussion open until: Jul 27, 2023
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