基于模糊失效准则的混凝土结构横向裂纹可靠度  

Reliability analysis for transverse crack in concrete structure based on fuzzy invalidation criterion

作　　者：蔡斌[1,2] 孟广伟[2,3] 董心[2] 李锋[2] 

机构地区：[1]吉林建筑工程学院,长春130021 [2]吉林大学机械科学与工程学院,长春130022 [3]吉林大学汽车仿真与控制国家重点实验室,长春130022

出　　处：《吉林大学学报（工学版）》2011年第4期1029-1033,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：吉林大学'985工程'项目;吉林省科技厅基金项目(20090540;20100180;20080711);高等学校博士学科点专项科研基金项目(20060183063);吉林省教育厅科研项目(吉教科合字[2011]178号)

摘　　要：针对现行国家标准尚未给出混凝土结构构件正常使用极限状态下目标可靠度指标的情况,提出了基于模糊失效准则的混凝土结构构件正常使用状态下的可靠度分析方法。构造混凝土模糊隶属函数,通过建立等效功能函数方法使混凝土结构模糊可靠度问题转化为传统可靠度计算问题。通过JC法求解,计算出正常使用状态下混凝土结构构件横向裂纹的模糊可靠度指标。与传统分析方法相比,考虑模糊性后混凝土结构可靠度下降,这点为今后混凝土结构设计提供理论支持。In view of the situation that the national standard＂Code for Design of Concrete Structure＂does not give the target reliability index of the concrete structure member in the serviceability limited state, a method of reliability analysis was proposed for the concrete structure member under the normal service state based on fuzzy invalidation criterion. A fuzzy membership function was built for the concrete. The structure fuzzy reliability problem was transformed to a traditional reliability calculation problem by the method of establishing an equivalent functional function. The fuzzy reliability index for the transverse crack in the concrete structure member under the normal service state was calculated by JC solution method. Compared with the traditional analysis method, the method considering the fuzziness gave less reliability of concrete structure, this provided one of the theoretical supports for concrete structure design.

关 键 词：固体力学 模糊失效准则 混凝土结构 可靠度 使用极限 隶属函数 

分 类 号：O344[理学—固体力学]