Comparative Analysis on Earthquake Response of Subway Tunnels between Numerical Simulation and Shaking Table Test

CHEN Guo-xing
ZUO Xi,
ZHUANG Hai-yang
Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing, China
DU Xiu-li
College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, China

Keywords:

Subway tunnels; numerical simulation; shaking table test

ABSTRACT:

Based on the shaking table test result of the dynamic interaction between soil and subway tunnel in liquefiable soil, a 2-D nonlinear dynamic interaction finite element model is established to simulate the system of soil-tunnel with the platform of ABAQUS. In the finite element model, dynamic viscoplastic model with memorial nested yield surface is used to simulate the dynamic characteristic of soil, while the plastic-damage model is used to simulate the dynamic characteristic of concrete. Corresponding to the test conditions, all the instances are simulated. Compared with the test record, it is proved that both the finite element model and the shaking table test are correct, their results are well identical with each other’s and the rules are coincident as well.

1 Introduction

With the development of the economy and the urban population, the urban traffic becomes the bottle-neck to hinder the development. Though the road area is limited, and people begin to establish underground traffic to release the tension. The underground structures, being confined by the surrounding rock or soil, are usually assumed to have good anti-seismic ability. However, according to earthquake disaster in recent years, the underground structures are not always safe. Therefore, it is necessary to study on seismic behavior of underground structure. So far, many researchers have learnt about the seismic response of underground structures. Liu Jingbo(2005) analyzed the seismic response of shield tunnels with complex response method, and also analyzed the influence of the factors such as the distance between the twins tunnels, the elastic modulus, thickness of the lining etc.

Hongbin Huo(2003) compared the destruction of Dakai subway station and the finite element numerical simulation results, taking ABAQUS as simulation platform and considering the interaction between vertical and horizontal seismic. The feasibility of the finite element analysis about underground structure and soils is well proved. Yang Linde(2003) designed the model box and conducted shaking table model test on subway station. Then, the numerical simulation of model test is performed based on the Lagrangian difference algorithm. Due to lack of measured data and test record, numerical simulation without comparative object becomes the chief
treatment method for seismic response of soil-underground structure system. In order to verify the reasonableness of calculation model and the reliability of test results, the comparison research between numerical simulation results and model test records is very necessary.
In this paper, the numerical simulation of subway tunnels is well conducted with the platform of ABAQUS software to analyse the dynamic interaction between soil and subway tunnels. And then, the numerical simulation results are compared with the test results.

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Comparative Analysis on Earthquake Response of Subway Tunnels between Numerical Simulation and Shaking Table Test 2011-04-07T13:03:00-07:00 Rating: 4.5 Diposkan Oleh: Andre S