Simulation of tunnel response under spatially varying ground motion |
| |
Authors: | Duhee Park Myung Sagong Dong-Yeop Kwak Chang-Gyun Jeong |
| |
Affiliation: | 1. Department of Civil and Engineering, Hanyang University, 17 Haengdang-dong, Sungdong-gu, Seoul, South Korea;2. Korea Railroad Research Institute, Woram-dong, Uiwang-si, Gyeongi-do, South Korea |
| |
Abstract: | Various components including wave scattering, wave passage, and site amplification effects cause the ground motion to vary spatially. The spatially varying ground motion can significantly influence the dynamic response of longitudinal structures such as bridges and tunnels. While its effect on bridges has been extensively studied, there is a lack of study on its effect on underground tunnels. This paper develops a new procedure for simulating the tunnel response under spatially varying ground motion. The procedure utilizes the longitudinal displacement profile, which is developed from spatially variable ground motion time histories. The longitudinal displacement profile is used to perform a series of pseudo-static three-dimensional finite-element analyses. Results of the analyses show that the spatially variable ground motion causes longitudinal bending of the tunnel and can induce substantial axial stress on the tunnel lining. The effect can be significant at boundaries at which the properties of the ground change in the longitudinal direction. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|