大跨隔震结构基于结构随机因子法的响应分析  

Response analysis of large-span isolated structures based on the random factor method

作　　者：王曙光[1] 杜东升[1] 李威威[1] 缪卓君[1] 

机构地区：[1]南京工业大学土木工程学院,南京211816

出　　处：《振动与冲击》2017年第10期154-158,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(51678301;51678302);江苏省产学研前瞻性联合研究项目(BY2015005-14)

摘　　要：结合等价线性化方法,将随机因子法拓展应用到非线性多自由度结构中。选取隔震支座的屈服位移、面积、面压和高度等四个参数为随机变量来考虑隔震层刚度和结构质量的随机性,采用结构随机因子法建立大跨隔震结构的四个随机变量与结构刚度和质量之间的关系,应用代数综合法推导了结构位移响应的数字特征计算表达式。最后通过算例研究了多维地震下大跨隔震结构中结构随机性对位移响应的影响,并获得了一些有意义的结论。Combined with the equivalent linearization technique,the random factor method was applied to analyse multi-degree-of-freedom nonlinear isolated structures.Four random factor,namely the yield displacement,area,pressure and height of the isolation bearing were chosen to consider the randomness of isolation layer stiffness and structural mass.The relationships between the four basic random variables and the structural stiffness and mass were established by using the method provided.The computational expressions of the structural displacement response were deduced by using the algebra synthetic method.Then a long-span isolated structure was analysed based on the improved random factor method and some beneficial conclusions were obtained.

关 键 词：大跨隔震结构 随机因子法 位移响应 

分 类 号：TU352.1[建筑科学—结构工程]