摘要
针对双线性单自由度体系定义了残余位移系数,然后选取100条地震波,通过弹塑性动力时程分析,建立了等强残余位移系数谱,分析了其影响因素,并建立了拟合公式,最后对残余位移和最大位移之间的关系进行了研究。结果表明:在总体上,结构周期越小,强度越低,屈服后刚度系数越小,其残余位移系数越大;结构周期较大时,残余位移系数和周期之间关系不大;结构周期越小,结构强度对残余位移系数的影响越大;残余位移和最大位移基本呈线性关系。
The residual displacement ratio is defined for the bilinear single degree of freedom(SDOF) system, and the equal strength residual displacement ratio spectrum is constructed by means of elasto-plastic time history analyses using 100 earthquake records. The factors influencing the spectrum are analyzed and the corresponding fitting formulas are established. Finally, the relationship between the residual displacement and the maximum displacement is studied. The results indicate that, on the whole, the smaller the period, strength, or the post-yielding stiffness coefficient, the larger the residual displacement factor. When the structural period is relatively large, the residual displacement factor is basically independent of the period. The smaller the period is, the greater the structural strength influences the residual displacement factor. In addition, the residual displacement basically has a linear relationship with the maximum displacement.
出处
《工程力学》
EI
CSCD
北大核心
2015年第1期163-167,共5页
Engineering Mechanics
基金
国家自然科学基金项目(51208386)
关键词
单自由度体系
残余位移系数
弹塑性动力时程分析
强度折减系数
最大位移
SDOF system
residual displacement ratio
elasto-plastic dynamic time-history analysis
strength reduction factor
maximum displacement
