Validation of a steel dual-core self-centering brace （DC-SCB） for seismic resistance： from brace member to one-story one-bay braced frame tests

作     者：Chung-Che CHOU Ping-Ting CHUNG Tsung-Han WU Alexis Rafael Ovalle BEATO 无

作者机构：Department of Civil Engineering Taiwan University Taipei Taiwan China Director Center for Earthquake Engineering Research (CEER) Taiwan University Taipei Taiwan China 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2016年第10卷第3期

页      面：303-311页

核心收录：

学科分类：1305[艺术学-设计学（可授艺术学、工学学位）] 081405[工学-防灾减灾工程及防护工程] 08[工学] 081402[工学-结构工程] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：the Ministry of Science and Technology  Taiwan  China for financially supporting this work under Contract 

主　　题：dual-core self-centering brace （DC-SCB） braced frame tests residual deformation 

摘      要：A steel dual-core self-centering brace （DC-SCB） is an innovative structural member that provides both energy dissipation and self-centering properties to structures, reducing maximum and residual drifts of structures in earthquakes. The axial deformation capacity of the DC-SCB is doubled by a parallel arrangement of two inner cores, one outer box and two sets of tensioning elements. This paper presents cyclic test results of a DC-SCB component and a full- scale one-story, one-bay steel frame with a DC-SCB. The DC-SCB that was near 8 m-long was tested to evaluate its cyclic behavior and durability. The DC-SCB performed well under a total of three increasing cyclic loading tests and 60 low- cycle fatigue loading tests without failure. The maximum axial load of the DC-SCB was near 1700 kN at an interstory drift of 2.5%. Moreover, a three-story dual-core self-centering braced frame （DC-SCBF） with a single-diagonal DC-SCB was designed and its first-story, one-bay DC-SCBF subassembly specimen was tested in multiple earthquake-type loadings. The one-story, one-bay subassembly frame specimen performed well up to an interstory drift of 2% with yielding at the column base and local buckling in the steel beam; no damage of the DC-SCB was found after all tests. The maximum residual drift of the DC-SCBF caused by beam local buckling was 0.5% in 2.0% drift cycles.