基于多元非线性回归的隧道结构可靠度及敏感性分析  

Analyse on reliability and sensitivity of tunnel structure based on multivariate nonlinear regression

作　　者：杨昀[1] 武清玺[1] 戚桂宾[1] 

机构地区：[1]河海大学力学与材料学院,江苏南京210098

出　　处：《四川建筑科学研究》2013年第3期68-72,共5页Sichuan Building Science

摘　　要：针对隧道衬砌结构可靠度分析中功能函数难以显式表达的特点,类比响应面法提出了一种较为实用的可靠度计算方法。该方法利用ABAQUS非线性有限元分析及Origin数据处理的优势,拟合出各参数的单一随机变量函数,进行敏感性分析,从中提取能反映结构响应与随机变量变化关系的有价值因子进行组合。最后利用多元线性或非线性回归求出待定系数的值,得到满足工程要求的显式功能函数,进而用编制的一次二阶矩法可靠度指标计算程序进行可靠度计算。The reliability analysis of tunnel lining structure is diflqcult to show as explicit expression,because this characteristic, analog response surface method, as a practical reliability calculation method, is using the advantage of ABAQUS non-linear finite element analysis and Origin data processing,from fitting single random variable function of parameters for sensitivity analysis, extracts valuable factors which can reflect the structural response and random variable relationship to combine. Then using multiple linear or nonlinear regression determines the value of undetermined coefficients, get the explicit function which meet the engineering requirements, and then calculate the reliability apply to self-designed calculation program about first - order second-moment method.

关 键 词：衬砌结构 有限元 多元非线性回归 一次二阶矩法 敏感性 结构可靠度 

分 类 号：U451.4[建筑科学—桥梁与隧道工程]