钢筋砼结构非线性随机地震响应分析

STUDY ON NONLINEAR RANDOM SEISMIC RESPONSE OF REINFORCED CONCRETE STRUCTURES

考虑地震作用和结构参数的随机性，建立了钢筋砼结构药非线性随机动力学模型。文中导出了随机结构动力分析的非线性随机有限元法的增量列式，并据此对多层钢筋砼结构进行了弹塑性随机地震响应分析。计算结果与该建筑物的实际震害作了对比，效果良好。还讨论了动力模型中随机变量对响应量的影响。

A nonlinear random dynamic mode with stochastic variations of seismic action and structural parameters is constructed. The incremental formulae of dynamic analysis on nonlinear stochastic finite element method are also given, which hare been used for the seismic response analysis of reinforced concrete multistory buildings at elastoplastic stage. The calculated results are in good agreement and those of the actual damaged buildings in earthquakes. In addition the effects of the stochastic variations of structural parameters and seismic action in random dynamics model on the seismic response of the structure are investigated in detail.