详情

原文传递 Design, Testing, and Detailed Component Modeling of a High-Capacity Self-Centering Energy-Dissipative Brace

题名：	Design, Testing, and Detailed Component Modeling of a High-Capacity Self-Centering Energy-Dissipative Brace
其他题名：	American Institute of Steel Construction(AISC).(2010)."Seismic provisions for structural steel buildings."American National Standards Institute(ANSI)/AISC 341-10,Chicago.
正文语种：	英文
作者：	Jeffrey Erochko
关键词：	Residual drifts;Steel frames;Self-centering systems;Nonlinear analysis;High-performance systems;High-capacity bracing systems;Seismic effects
摘要：	The self-centering energy-dissipative (SCED) brace is an innovative cross brace for buildings that provides a nonlinear response with good energy dissipation and postyield stiffness while minimizing residual drift after an earthquake. This provides a high level of seismic performance by allowing structures to remain operational even after major seismic events. Recently, the SCED brace has been improved through the design and experimental evaluation of a high-capacity SCED (HC-SCED) that has an axial capacity similar to some of the largest available conventional cross braces for buildings. This prototype HC-SCED satisfied testing protocols for buckling-restrained braces and exhibited full self-centering behavior during cycles up to 1.5％ drift. To characterize the hysteretic response of the brace in detail, a new analytical approach is developed. This new approach is necessary because simplified stiffness estimates do not provide good predictions of the low-amplitude displacement response and initial effective stiffness that was measured in the full-scale experiments. The proposed analytical approach includes the effects of fabrication tolerances, which have been identified as the main reason for incorrect low-amplitude displacement predictions that result from the simplified stiffness estimates. Using the results from the HC-SCED tests, the new analytical approach provided good estimates of the initial stiffness of the braces and also was able to predict the behavior of the brace well under a larger fabrication tolerance scenario. These improved predictions may be used to improve the characterization of the effective hysteretic behavior of actual SCED braces for use in nonlinear time history analyses.
出版年：	2015
论文唯一标识：	P-26Y2015V141N08009
英文栏目名称：	Technical Papers
doi：	10.1061/(ASCE)ST.1943-541X.0001166
期刊名称：	Journal of Structural Engineering
拼音刊名(出版物代码)：	P-26
卷：	141
期：	08
页码：	82-93