Criteria are proposed for determining the stiffness and strength demands for the seismic design of pin-supported walls in low- and medium-rise reinforced-concrete moment frames. A plasticity ratio and a global stiffness ratio are introduced to evaluate the effect of pin-supported walls (PS walls) in mobilizing the seismic capacity of the moment frame. Incremental dynamic analyses of 4-, 8-, and 12-story prototype PS wall-moment frames of various global stiffness ratios show that a constant stiffness ratio of two can generally ensure the formation of a global plastic mechanism no matter if the moment frame is a strong column-weak beam one or not. By mobilizing more structural elements to resist the earthquake action, the PS walls also increase the earthquake-resisting strength of the structure. Higher mode vibrations have a major effect on the strength demand for PS walls. Simple criteria are also developed for estimating the strength demands for the purpose of preliminary design of PS walls. The same methods for determining the stiffness and strength demands for PS walls are also applicable to other strong spine systems.
Downloaded 402 times
Stiffness and Strength Demands for Pin-Supported Walls in Reinforced-Concrete Moment Frames
Journal of Structural EngineeringJanuary 1992
Journal of Structural EngineeringJune 1993
Seismic Evaluation of Steel Moment Frames and Shear Walls Using Nonlinear Static Analysis Procedures
Structures Congress 2011April 2012
Influence of Column Strength and Stiffness on the Inelastic Behavior of Strong-Column-Weak-Beam Frames
Journal of Structural EngineeringJune 2017
Journal of Structural EngineeringSeptember 2015
Analyst, Dept. of Risk Modeling & Analytics, China Re Catastrophe Risk Management, Beijing 100052, China.
Graduate Student, Institute of Engineering Mechanics, China Earthquake Administration, Hebei 065201, China. ORCID: https://orcid.org/0000-0003-2388-3638
Engineer, Research Dept. for Engineering Technical Design, China Institute of Building Standard Design and Research, Beijing 100048, China.
Professor, Institute of Engineering Mechanics, China Earthquake Administration, Hebei 065201, China.
Received: August 27, 2018
Accepted: April 06, 2020
Published online: June 26, 2020
©2020 American Society of Civil Engineers