隧道概率极限状态设计法荷载和抗力变量相关性研究

Study on the correlation between load and resistance variables in the probabilistic limit state design method of tunnels

摘要

概率极限状态设计法中荷载的作用效应(S)和结构的抗力(R)是两个相互独立的变量。对于工民建、桥梁等建构筑物来说，满足概率极限状态设计法中荷载和结构承载力相互独立的要求。但对于隧道及地下工程来说，隧道的围岩荷载与结构的抗力存在密切的相关性，荷载随着结构抗力的增大而增大，并不满足相互独立的条件。因此，需要根据荷载与抗力的相关性，修正隧道概率极限状态设计法的概率函数。

Abstract

The effect of load(S) and the resistance of the structure(R) in the probabilistic limit state design method are two independent variables, which are for the water coming from the buildings such as industrial and civil buildings, bridges, etc., to meet the requirements that the load and the structural bearing capacity are independent of each other, but for the tunnel and underground engineering, they do not meet the conditions that are independent of each other, the surrounding rock load of the tunnel is closely related to the resistance of the structure, and the load increases with the increase of the resistance of the structure, therefore, it is necessary to follow the correlation between the load and the resistance. Modify the probability function of the limit state design method.

关键词

隧道 / 荷载 / 抗力 / 概率 / 极限状态设计法

Key words

tunnel / loads / resistance / probability / ultimate limit state design method

Author summay

刘淑芬(1985—), 女, 副教授, 主要从事数理统计、数学建模的研究。E-mail: [e-mail]

基金资助

江西省教育厅科学技术研究项目(GJJ2403004)

中国国家铁路集团有限公司科技研究开发计划(N2022G022)

中国国家铁路集团有限公司科技研究开发计划(N2023G045)