地铁装配式外置槽道火灾下温度分布与温度应力数值模拟

Hazard Control in Tunnelling and Underground Engineering

2019, Vol. 1

Issue (3): 87-95 DOI:

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Numerical simulation of temperature distribution and thermal stress in assembled external channel of metro under fire

CAI Yanyan¹, ZHU Yaoliang^1,2, PENG Jian³, LIU Rongbiao³, HUANG Shaoqiang¹, HU Runmin¹, YU Jin^1*

1. Fujian Engineering Technology Research Center for Tunnel and Underground Space, Huaqiao University, Xiamen 361021, Fujian, China;
2. College of Engineering, Fujian Jiangxia University, Fuzhou 350108, Fujian, China;
3. Kangyuan Rail Transit Technology(Fujian)Co., Ltd., Fuzhou 350000, Fujian, China

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Abstract In order to study the safety performance of the subway assembled external channel in the fire scenario, the ABAQUS finite element software was used to establish the numerical model of tunnel segments, longitudinal connection bolts and external channel. The temperature and stress distribution of the new structure under the HC heating curve were obtained. The study showed that the existence of external channel could significantly improve the temperature value of longitudinal connection bolts. Compared with the results without external channel, the temperature distribution on the contact surface of the hand hole which close to the hanging ear was significantly different, the temperature value was about 100 ℃ higher. The external channel had little influence on the temperature of the concrete which at the side of the hand hole and away from the hand hole, but it could accelerate the heating of the longitudinal connection bolts which at the exposed end as the same as the contact surface. Additional thermal stress was generated as the external channel further increased the temperature inhomogeneity between the longitudinal connection bolts and the surrounding concrete, but the final result was still within the safe range.

Key words： subway assembled external channel fire temperature distribution temperature stress

Received: 02 September 2019 Published: 13 November 2019

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	CAI Yanyan
	ZHU Yaoliang
	PENG Jian
	LIU Rongbiao
	HUANG Shaoqiang
	HU Runmin
	YU Jin

Cite this article:

CAI Yanyan,ZHU Yaoliang,PENG Jian, et al. Numerical simulation of temperature distribution and thermal stress in assembled external channel of metro under fire[J]. Hazard Control in Tunnelling and Underground Engineering, 2019, 1(3): 87-95.

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http://tunnel.sdujournals.com/EN/ OR http://tunnel.sdujournals.com/EN/Y2019/V1/I3/87

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