多高层框排架-支撑结构减震设计及试验研究

为了解决多高层框排架-支撑结构存在的抗震能力较弱、出现薄弱层等问题,以某典型多高层框排架-支撑结构为实例,基于防屈曲支撑( buckling-restrained brace, BRB)消能减震技术设计了3种减震方案,并通过有限元软件对原结构及各方案进行了弹塑性分析。分析结果表明：3种方案均可改善层间位移角分布,提高结构抗震性能,其中降刚度方案的经济性及减震效果均较好。按1：10缩尺比例分别设计制作原结构及降刚度方案试验模型,通过静力往复加载试验,验证了减震方案提高结构阻尼比及抗震性能的效果。

Earthquake-reduction Design and Experimental Research of Multi-story and High Rise Frame-bent Structure With Braces

To improve the seismic performance of the multi-story and high rise frame structure, three kinds of vibration isolation schemes were proposed in this paper based on the energy dissipation technique of BRB ( buckling-restrained brace, BRB ) . Taking a typical multi-story and high rise frame-bent structure with braces as an example, the nonlinear finite element analysis was carried out to quantify the effect of these schemes. The research results show that all these schemes significantly improve the distribution of storey drift angle and seismic performance of the structure, and in which, the scheme of reduced stiffness achieved excellent performance both in economy and security. Verification of the model was carried out by a cyclic loading experiment of 1:10 models of the frame-bent structure with braces and satisfactory agreement was obtained.