摘要
本文以结构分析和试验结果为基础,提出了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,分析了非线性钢结构的随机变形与随机滞回耗能反应;考虑结构破坏等级的模糊性,确立了基于综合破坏指数的模糊震害等级及结构的模糊安全准则,分析了结构的模糊动力可靠性,以此为基础,提出了基于动力可靠性的结构设计方法,这种方法能较好地体现“小震不坏、大震不倒”的设计思想.
In this paper,based on the structural analysis and experimental results,a feasi-ble method is presented for the dynamical reliability analysis and the design ofnonlinear steel structures subjected to earthquake.Firstly,earthquake ground mo-tion is simulated as a stationary filtered non-white noise corresponding to theearthquake intensity degree and the random responses of deformation and hystereticenergy dissipated are analysed for a nonlinear steel structure.Then,by taking thefuzziness of structural damage grades into consideration and based on the comprehen-sive damage index,the fuzzy damage grades and fuzzy safe criteria are establishedand the fuzzy dynamical reliability of structure is analysed.Finally,a method ofstructural design is presented,which is based on the analysis and results ofdynamical reliability.
基金
霍英东教育基金
国家自然科学基金
关键词
非线性
抗震
钢
结构
动力学
nonlinear steel structure
fuzzy safe criterion
fuzzy dynamical reliability
aseismic design
