【摘要】 针对实际地震动的多维性、偏心引起结构多分量反应的耦合作用以及结构非线性的空间耦合特性,建立了可考虑刚度偏心影响的单层体系弹塑性等延性拟强度折减系数谱。根据对硬、中、软三类场地60条地震动记录进行时程计算的结果,分析了不同场地类型、相对偏心距、扭转频率比等因素对拟强度折减系数谱的影响,为进一步建立可应用于工程实际的多维弹塑性设计反应谱奠定基础。更多还原

【Abstract】 The strength reduction factor spectra of constant ductility factors for one–storey asymmetric plan system is presented considering the characters of multi-dimensional response of structures,torsion coupling response of structures and nonlinear spatial coupling of structural multi-components.The effects of normalized stiffness eccentricity,rotation frequency ratio for spectra amplitude on strength reduction factors are discussed based on statistic analysis of 60 recordings in two directions for hard site,medium site and soft site,which is the base for further forming the inelastic design response spectra of asymmetric systems in engineering application.更多还原