工程荷载随机过程模型组合方法研究

在结构设计中通常要考虑若干个荷载共同作用下的荷载组合问题。在对泊松矩形波与泊松脉冲两大类常见荷载过程进行理论推导及数值计算分析的基础上,提出了在极限状态设计中用累积分布函数表达荷载组合最大密度函数的荷载组合方法,并将在极限状态设计中的计算结果与Turkstra方法和蒙特卡罗法的计算结果进行了比较。分析结果表明,采用本文提出的方法进行荷载组合计算是可行的。

Study on combination method of stochastic load processes

When more than one loads act on a structure, the combination of stochastic loads is generally considered in the design of the structure. Based on the theoretical derivation and numerical calculation analysis to the process of two common loads in Poisson square wave and Poisson impulse, this paper presents the combination method of loads, i.e. the maximum intensity function of load combination is expressed by the cumulative distribution function in the limit state design. In addition, the result calculated during the limit state design is compared with those calculated by Turkstra and Monte Carlo methods and the analytical results show that the method proposed in this paper is feasible in the calculation of load combination.