用于抗震韧性提升的自复位结构构件研究综述

Review of research on self-centering structural components for seismic resilience improvement

为提升建筑结构的抗震韧性,对自复位结构构件进行了系统研究.介绍了自复位结构构件的基本构成和工作原理,总结了其研究与发展历程,分析了存在的问题和未来发展方向.结果表明,自复位梁柱、自复位耗能支撑和自复位钢筋混凝土/钢板剪力墙等自复位结构构件具有旗形或类旗形滞回特性,可消耗地震输入能量,并使结构残余位移角小于0.5%.在构件中,复位材料主要有预应力筋和钢绞线、复合材料筋、形状记忆合金、弹簧等.为推动自复位结构构件的工程应用,亟需在优化构造、提升装配水平,改善抗震性能、韧性能力和耐久性,丰富新型结构体系中的应用方式,建立实用设计和优化方法等方面开展深入研究.

To improve the seismic resilience of building structure,self-centering structural components are systematically studied.The basic configuration and working principle of self-centering structural components are introduced,their research and development histories are summarized,and the existing problems and future development directions are analyzed.The results show that the self-centering structural components,including self-centering beams and columns,self-centering energy dissipation braces,and self-centering reinforced concrete/steel plate shear walls,exhibit flag-shaped or quasi-flag-shaped hysteretic characteristics,and can dissipate seismic input energy,ensuring the structural residual displacement ratio less than 0.5%.The recentering materials in components consist of prestressed tendon and steel strand,fiber reinforced composite material bar,shape memory alloy,spring,etc.To promote the application of self-centering structural components in engineering,it is urgent to conduct in-depth research in optimizing configuration,increasing assembly level,improving seismic performance,resilience and durability,proposing application methods in novel structural systems,and establishing practical design and optimization approaches.