Study on Mechanical Model of DRC Segment for Shield Tunnel

ZHANG Wenjun; Zhang Gaole; JIN Mingming; KOIZUMI Atsushi

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Study on Mechanical Model of DRC Segment for Shield Tunnel

ZHANG Wenjun 1 * #,Zhang Gaole 2,JIN Mingming 1,KOIZUMI Atsushi 3

1.School of Civil Engineering, Tianjin University, Tianjin, China, 300072

2.Key Laboratory of Coast Civil Structure Safety of the Education Ministry, Tianjin University, Tianjin, China,300072

3.Key Laboratory of Coast Civil Structure Safety of the Education Ministry, Tianjin University, Tianjin, China,300072

*Correspondence author

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Funding: 高等学校博士学科点专项科研基金新教师类资助课题（No.编号:20120032120050), National Natural Science Foundation of China）

Opened online:16 May 2016

Accepted by: none

Citation: ZHANG Wenjun,Zhang Gaole,JIN Mingming.Study on Mechanical Model of DRC Segment for Shield Tunnel[OL]. [16 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4688055

The composite segment has been used in the deep, long large, and multi-cross-section shield tunnels of the subway, underground road, underground pedestrian passage and underground reservoir, etc. However, the mechanical behaviors of the composite segment are not clarified because the structural type is complicated, and the selected structure model and parameters are not reasonable. Compared with the closed-composite segment, DRC segment without top skin plate has quite different mechanical performance since the skin plate plays a significant role in closed-composite segment. Considering confined effect, interface slip and a stiffness reduction method was proposed to establish the structural model of 5-face composite segment in this paper. The proposed method can be used to solve the coupling of multi-material and multi-scale, and are suitable for a rational design of the composite segment because of improving the convergence of computations and having high precision and clear physical significance.

Keywords:stiffness reduction, DRC composite segment, interface slip,fiber element analysis

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