摘要
自复位防屈曲支撑特殊的恢复力模型使得安装有这种支撑的结构在地震作用下的反应与传统结构大不相同,因此开展此种结构抗震性能的研究十分必要。该文首先根据较高的性能目标提出一种简单且足够精确的自复位防屈曲支撑结构的恢复力模型;然后结合单自由度自复位防屈曲支撑体系的运动方程确定影响该种结构地震位移反应(即最大非线性位移及位移比谱)的所有独立参数;并证明了无刚度和无强度退化结构的非线性位移比与地震动的幅值无关。最后通过两个例子证明了该文的结论。
The unique restoring force model for self-centering buckling-restrained braces（SC-BRB） made the seismic response of structures with SC-BRBs quite different from that of the traditional structures. As a result, it is necessary to study the aseismic performance of structures with SC-BRBs. A simplified yet accurate restoring force model for SC-BRB was proposed according to a higher performance objective, which can be extended to structures with self-centering friction braces. Then all independent parameters that could completely determine the seismic displacement response, i.e. maximum displacement ratio spectrum, of a structure with SC-BRBs were found using the kinetic equation of a SDOF SC-BRB system. Additionally, a maximum displacement ratio spectrum is proven irrelevant with the amplitude of ground motion for structures without stiffness and strength degeneration. Finally, the main conclusions were validated by two examples.
出处
《工程力学》
EI
CSCD
北大核心
2016年第1期188-194,共7页
Engineering Mechanics
基金
国家自然科学基金项目(51308169
51308160)
哈尔滨工业大学科研创新基金项目(HIT.NSRIF.2015120)
住房城乡建设部科学技术项目计划(2015k2-025)
关键词
自复位防屈曲支撑结构
恢复力
结构抗震
非线性位移
关键参数
buckling-restrained braced structure
restoring force
structural seismic design
nonlinear displacement
key parameters
