带支撑钢框架结构的抗风可靠度二阶分析

SECOND ORDER STOCHASTIC RESPONES AND RELIABILITY ANALYSIS OF STEEL BRACED FRAMES SUBJECTED TO WIND LOAD

采用杆系———层间模型分析高层建筑带支撑钢框架结构的二阶随机风振响应问题。先用杆系模型分析形成了考虑二阶效应的结构刚度矩阵，然后用层间模型把整个结构简化成质点串，进而用等效线性化方法分析获得结构层间位移和速度、加速度的统计量，最后结合工程算例分析了二阶效应对结构风振响应统计量及其正常使用可靠度的影响。

In this paper, analyses of second order stochastic response are carried out. Firstly, based on the beam column differential equation of equilibrium, a second order stiffness matrix is derived. Secondly, by applying the member story vibration model and equivalent linearization technique, the statistic values of the stochastic respones of the structure subjected to wind vibration are obtained. Finally, numerical examples are given herein, and the second order effects on the statistic values and the norma...