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在地下工程结构可靠性分析中,岩土体参数离散性大,功能函数非线性程度高,常为隐式函数,因此,对可靠度计算方法提出了很高的要求。针对传统蒙特卡罗抽样方法计算量非常大,难以满足工程要求的问题,基于拉丁超立方抽样技术,结合了Matlab和有限元软件Abaqus各自的优点,编制了Matlab-Abaqus联合计算的有限元可靠度程序,该程序具有节省样本空间、提高抽样效率的显著特点。通过对某圆形隧道的结构可靠性分析,表明该程序能很快达到收敛,能够满足地下工程结构可靠性计算分析的要求。
In the reliability analysis of underground engineering structures, the parameters of rock and soil are large in discreteness and highly non-linear in function, which is often an implicit function. Therefore, the reliability calculation method is put forward with high requirements. Aiming at the problem that the traditional Monte Carlo sampling method is computationally intensive, it is difficult to meet the engineering requirements. Based on the Latin hypercube sampling technique and the advantages of Matlab and Abaqus software, the finite element reliability Program, the program has the saving of sample space, improve the sampling efficiency of the salient features. The structural reliability analysis of a circular tunnel shows that the program can quickly converge and meet the requirements of the reliability calculation and analysis of underground engineering structures.