基于系统可靠度的地下管网抗震设计  

Seismic design of underground pipe networks on the basis of system reliability

作　　者：缪惠全 李杰[2,3] Miao Huiquan;Li Jie(Beijing University of Technology,Beijing 100124,China;Tongji University,Shanghai 200092,China;Shanghai Institute of Disaster Prevention and Relief,Shanghai 200092,China)

机构地区：[1]北京工业大学,北京100124 [2]同济大学,上海200092 [3]上海防灾救灾研究所,上海200092

出　　处：《土木工程学报》2021年第6期35-40,共6页China Civil Engineering Journal

基　　金：国家重点研发计划(2016YFC0802400);国家自然科学基金重点项目(51538010)。

摘　　要：地下管网是生命线工程的重要组成部分。文章以地下管网整体有限元分析模型、基于物理机制的随机地震动场和概率密度演化方法为基础,发展地下管网的系统可靠度分析方法和基于可靠度的抗震设计方法。应用该方法,可以得到管网地震反应的概率密度函数和系统可靠度,进而以典型地下管网为例,具体说明这一设计方法。文中方法的创新性:(1)该方法针对的是整个地下管网结构而非简单的管线结构;(2)该方法可以完整获得管网结构不同部位和管网整体的随机反应信息,并据此实现管网内部和管网整体的抗震可靠度评价,从而以此实现基于整体可靠度的地下管网抗震设计。Underground pipe networks are important components of lifeline engineering.The system reliability analysis method and reliability-based seismic design method of buried pipe networks are developed on the basis of the finite element model of underground pipe networks,the random seismic field model based on the physical mechanism and the probability density evolution method.By applying the methods,the complete probability density function and the system reliability of the buried pipe network can be obtained.Furthermore,with the typical buried pipe network taken as an example,the proposed new design method is demonstrated.The innovation of the method can be explained that firstly the method is developed aiming at the entire underground pipe networks instead of only simple pipelines;secondly,with the method,the random response information for different parts of the pipe networks and the entire pipe networks can be completely obtained,so that the seismic reliability of the structures can be assessed.As a result,the seismic design of the underground pipe networks based on the global reliability can be realized.

关 键 词：地下管网 抗震设计 概率密度演化方法 地震动场 

分 类 号：TU318.1[建筑科学—结构工程]