A Cyclic Backbone Curve for Shear-Critical Reinforced Concrete Walls
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Volume 145, Issue 4
Abstract
Backbone curves are used in seismic design standards as the basis for developing component models for nonlinear static and dynamic analysis. Herein, data from 240 tests of rectangular, barbell, and flanged shear-critical walls are assembled and analyzed to develop an improved cyclic backbone curve for use in nonlinear response-history analysis. Values of drift ratio and normalized lateral force at the control points on the cyclic backbone curve are identified. The effects of design parameters, including wall aspect ratio, axial load, day-of-test concrete compressive strength, vertical and horizontal web reinforcement ratio, reinforcement ratio in the boundary elements, and yield strength of reinforcement, on the coordinates of the control points are addressed. The accuracy of equations for peak shear strength is assessed using the collected test data.
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Acknowledgments
This project was supported by the National Institute of Standard and Technology under Grant No. SB1341-13-CQ-0009 to conduct a comprehensive review of the generalized component models published in the current ASCE/SEI standard and relevant research, and develop recommendations for improvement (ATC-114 Project). This support is gratefully acknowledged. The work forming the basis for this publication was conducted pursuant to a contract with the National Institute of Standard and Technology. The substance of such work is dedicated to the public.
Disclaimer
The authors are solely responsible for the accuracy of statements or interpretations contained in this paper. The first and third authors served as independent consultants to the Applied Technology Council. No warranty is offered with regard to the results, findings, and recommendations contained herein, either by the National Institute of Standards and Technology, or the Applied Technical Council, its directors, members, or employees. These organizations and individuals do not assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any of the information included in this publication.
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Published In
Journal of Structural Engineering
Volume 145 • Issue 4 • April 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jan 17, 2018
Accepted: Aug 31, 2018
Published online: Jan 24, 2019
Published in print: Apr 1, 2019
Discussion open until: Jun 24, 2019
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