Vibration Analysis of a Subaqueous Tunnel of Huangpu River during Earthquake

doi:10.16183/j.cnki.jsjtu.2001.10.017

Abstract

Abstract:

A spring-mass model was presented for numerical analysis of the response of a tunnel under the Huangpu River to actual earthquakes. In this model the soil is divided into many strips and each strip is simplified to a mass-spring system. The tunnel is treated as several beams connected by linear springs in longitudinal and lateral directions. The tunnel is connected with the soil also by linear springs in the same two directions. So the total tunnel-soil system is simplified to a rigid multibody system. The vibration response of this system during earthquake can be obtained by a computer program DAMB. From the numerical results it is recommended that every segment of the tunnel should be in the same length in order to reduce the no nuniform displacement and stress between the tunnel segments.

Key words: subaqueous tunnel, antiseismic design, vibration analysis, multibody system dynamics

CLC Number:

YANG Hui, LU Jian-fei, WANG Jian-hua, ZHANG Qin-hua. Vibration Analysis of a Subaqueous Tunnel of Huangpu River during Earthquake[J]. Journal of Shanghai Jiao Tong University, 2001, 35(10): 1512-1516.

Figures/Tables 6

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Tab. 1

?	地震波0°入射	地震波23°入射	地震波60°入射	地震波90°入射
最大轴力/MN	117(2-3)	108(2-3)	58(2-3)	0
最大剪力/MN	0	13.7(0-1)	30(0-1)	34(0-1)
最大弯矩/(MN·m)	0	79.8(9-10)	174(9-10)	222(9-10)
最大相对轴向位移/mm	16.2(2-3)	14.95(2-3)	8(2-3)	0
最大相对剪切位移/mm	0	7(0-1)	15(0-1)	17(0-1)
最大相对角位移/rad	0	8.4×10^-5 (9-10)	1.83×10^-4 (9-10)	2.34×10^-4 (9-10)
隧道本体最大轴力/MN	117(150-170)	108(150-170)	58(150-170)	0
隧道本体最大剪力/MN	0	13.7(0-1)	30(0-1)	34(0-1)
隧道本体最大弯矩/(MN·m)	0	250(30)	550(30)	617(30)

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