基于最小耗能原理的盾构隧道管片纵向接头损伤检测  

The damage detection of the shield tunnel segment joints at longitudinal seams based on the principle of minimum dissipation of energy

作　　者：马幼华 Ma Youhua(Shanghai Electric Power Design Institute Co.,Ltd.,Shanghai 200025,China)

机构地区：[1]上海电力设计院有限公司,上海200025

出　　处：《山西建筑》2020年第18期145-148,共4页Shanxi Architecture

摘　　要：随着城市地铁的快速发展,地铁已成为了许多城市人们重要的交通工具。为了保证地铁的安全运营,地铁隧道结构的损伤检测已经成为工程界和学术界研究的热门课题。对管片纵向接头力学行为进行分析,建立了管片纵向接头力学模型。然后以损伤前后管片接头张开角为地铁隧道结构损伤检测指标,并运用最小耗能原理,推导出管片接头损伤程度与损伤前后管片接头张开角的关系表达式。最后建立了接头数值计算模型进行数值分析,验证该方法可以简便、有效地识别地铁隧道结构的损伤。With the rapid development of urban subways,it has become an important transportat-ion means to the people in the city.In order to ensure the safety operation of the subways,damage detection and health monitoring of the subway tunnel structures has become a research focus in both the engineering and academic field.On the background of the shield tunnel of ShangHai Metro,the mechanical behavior of the segment joints at longitudinal seams is analyzed,and the mechanical model of the joint is established.Next,changes in the segment inclinations of the subway tunnel structure are chosen as the damage detection index,and the relation between the damage extent of the segment joint and the changes in the segment inclinations is derived using the principle of minimum dissipation of energy,through which the damage of segment joints can be easily obtained by the changes in segment inclinations.Finally,the numerical analysis is conducted by building the finite element model,and the result shows that damage of shield tunnel segment joints at longitudinal seam can be identified efficiently by using the method proposed in this paper.

关 键 词：盾构隧道 损伤检测 力学模型 最小耗能原理 

分 类 号：U455[建筑科学—桥梁与隧道工程]