The Damage Detection of the Shield Tunnel Segment Joints at Longitudinal Seams Based on the Principle of Minimum Dissipation of Energy
With the rapid development of urban subways, it has become an important transportation means to the people in the city.In order to ensure the safety operation of the subways, damage detection and health moni toring 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 joint opening angle 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 joint opening angle 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 joint opening angle.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 seams can be identified efficiently by using the method proposed in this paper.
Youhua Ma Lin Li Hongping Zhu
School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, China
国际会议
哈尔滨
英文
841-847
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）