基于响应面法的门式刚架结构可靠度分析

Analysis of the Structural Reliability of Portal Frame Based on Response Surface Method

对钢架厂房建立了分析可靠度的计算方法。首先,使用Monte-Carlo法得到服从一定分布的随机参数,运用复合失效准则建立不同的功能函数,从而得出相应的功能函数的样本点。然后,采用二次多项式拟合相应的响应面。与常规求解结构可靠度的方法相比,本方法具有计算速度比较快的优点。

This articld establishes the computational mehtod to analyze the reliability. Firstly, submitting to certain distribution are obtained for steel frame mill building through using Monte-Carlo method. Based on composite failure criterion, different performance functions are established. Through using random parameters and different performance functions, sample points of performance functions are obtained. Secondly, quadratic polynomial is used to fit response surface. Compared with other conventional algorithm, this method has faster calculation speed.