自复位支撑结构设计屈服点确定方法研究  

Determination method for yield points in the design of self-centering braced structures

作　　者：王涛 孔涛 孟丽岩 潘蕊 潘雨桐 WANG Tao;KONG Tao;MENG Liyan;PAN Rui;PAN Yutong(School of Architecture and Civil Engineering,Heilongjiang University of Science and Technology,Harbin 150022,Heilongjiang,China;School of Architecture Engineering,Guangzhou Institute of Science and Technology,Guangzhou 510540,Guangdong,China)

机构地区：[1]黑龙江科技大学建筑工程学院,黑龙江哈尔滨150022 [2]广州理工学院建筑工程学院,广东广州510540

出　　处：《地震工程学报》2025年第3期501-511,共11页China Earthquake Engineering Journal

基　　金：国家自然科学基金项目(52278173,52078398)。

摘　　要：确定结构设计屈服点是建立等延性弹塑性位移反应谱的关键问题。文章提出一种自复位支撑结构设计屈服点确定方法,采用直接基于位移的设计方法设计三层和五层自复位防屈曲支撑钢框架结构,分析设计屈服点对直接基于位移设计方法的精度和设计结果的影响规律。研究结果表明,对于低层和多层结构,采用所提出的屈服点确定方法进行直接基于位移的抗震设计时,结构延性能力能够满足延性设计需求;相比于传统的设计屈服点确定方法,在8度大震下结构最大层间位移角更接近2%的设计目标,降低了自复位防屈曲支撑的第一刚度设计值,设计的结构在满足安全性的同时具有更好的经济性。Accurate determination of structural yield points is critical for developing constant-ductility elastic-plastic displacement response spectra.This study proposes a systematic method to identify design yield points for self-centering braced structures.Using the direct displacement-based design method(DDBD),three-story and five-story steel frame structures with self-centering buckling-restrained braces(SCBRB)were designed,and the impact of design yield points on the accuracy and outcomes of DDBD was thoroughly analyzed.The research results show that,for both low-rise and multi-story structures,the structural ductility capacity can achieve the target ductility demand using the proposed determination method for seismic design.Under an 8-degree earthquake,the maximum story drift ratio of structures designed with the proposed method is closer to the design goal of 2%compared to conventional determination approaches,and the initial design stiffness of SCBRB is also reduced.These results demonstrate the effectiveness of the proposed method in balancing safety and economy for SC-BRB structural systems.

关 键 词：自复位支撑结构 直接基于位移的设计方法 屈服点 弹塑性位移反应谱 

分 类 号：TU431[建筑科学—岩土工程]