【摘要】 本文以结构分析和试验结果为基础,提出了多层非线性钢结构在地震作用下的动力可靠性分析及其在设计中应用的实际可行的方法。文中将地震地面运动模拟为平稳过滤有色噪声,利用等效线性化的能量平衡法分析了多层非线性钢结构的随机变形与随机滞回耗能反应;确立了基于综合破坏指数的模糊安全准则,分析了结构层模糊动力可靠性;提出了基于结构整体破坏指数的结构体系动力可靠性分析的新方法。在此基础上,提出了以动力可靠性为基础的结构设计方法,这种方法能较好地体现“小震不坏、大震不倒”的设计思想。更多还原

【Abstract】 In this paper, based on the structural analysis and experimental results, a feasible method is presented for the dynamical reliability analysis and design of a multi-storey nonlinear steel structure subjected to earthquake. Firstly, by simulating the earthquake ground motion as a stationary filtered non-white noise and using the energy balance technique of equivalent linearization, the random deformation and hysteretic energy dissipation of structure are analysed and their statistical moments are obtained. Then,the fuzzy safe criterion based on the comprehensive damage index is established and the fuzzy dynamical reliability of structural storey is analysed. Furthermore, by introducing a total damage index in the structural system, a new method is presented for analysing the dynamical reliability of structural system. Finally, a method of structural design based on the dynamical reliability is presented.更多还原