Investigation on hysteretic behavior of a novel spring-friction self-centering brace
Yang Chen,Cheng Chen,Jun Tang,Shiqiang Feng,Yong Yang
Abstract
A new method for the seismic design of plane steel moment resisting frames is developed. This method determines the design base shear of a plane steel frame through modal synthesis and spectrum analysis utilizing different values of the strength reduction (behavior) factor for the modes considered instead of a single common value of that factor for all these modes as it is the case with current seismic codes. The values of these modal strength reduction factors are derived with the aid of a) design equations that provide equivalent linear modal damping ratios for steel moment resisting frames as functions of period, allowable interstorey drift and damage levels and b) the damping reduction factor that modifies elastic acceleration spectra for high levels of damping. Thus, a new performance-based design method is established. The direct dependence of the modal strength reduction factor on desired interstorey drift and damage levels permits the control of deformations without their determination and secures that deformations will not exceed these levels. By means of certain seismic design examples presented herein, it is demonstrated that the use of different values for the strength reduction factor per mode instead of a single common value for all modes, leads to more accurate results in a more rational way than the codebased ones.
Yang Chen β 1) School of Mechanics and Engineering Science, Shanghai University, Shanghai, 200444, China; 2) China-Pakistan Belt and Road Joint Laboratory on Smart Disaster Prevention of Major Infrastructures, Southeast University, Nanjing, 211189, China
Cheng Chen β School of Mechanics and Engineering Science, Shanghai University, Shanghai, 200444, China
Jun Tang β Quakesafe Technologies Co., Ltd, Kunming, Yunnan,650200, China
Shiqiang Feng, Yong Yang β Department of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an, Shaanxi 710055, China
PDF Viewer
Preview uses the same access rules as Full Text PDF (subscription, purchase, or open access).
