Shaking table tests of tunnel linings in progressive states of damage |
| |
| Affiliation: | 1. School of Civil Engineering, Dalian University of Technology, Dalian, PR China;2. Institute of Mountain Hazards and Environment, Chinese Academy of Science, Chengdu, PR China;3. Design and Research Institute, Sichuan Provincial Transportation Department, Chengdu, PR China;4. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, PR China;1. Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China;2. Beijing City Traffic Collaborative Innovation Center, Beijing University of Technology, Beijing 100124, China;3. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu, SiChuan, China;4. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Dongsan Rd. 1, Chenghua District, Chengdu City, China;1. School of Civil Engineering, Central South University, Changsha, China;2. China Construction Fifth Engineering Division Corp., Ltd., Changsha, China;1. Department of Civil Engineering, Aristotle University, Thessaloniki, Greece;2. CentraleSupélec, Université Paris Saclay, France and Politecnico di Milano, Italy;1. Aristotle University of Thessaloniki, Department of Civil Engineering, Research Unit of Soil Dynamics and Geotechnical Earthquake Engineering, Thessaloniki, Greece;2. Institute of Engineering Seismology and Earthquake Engineering, EPPO-ITSAK, Thessaloniki, Greece;3. IFSTTAR French Institute of Science and Technology for Transport, Development and Networks, Nantes, France;1. Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing 210009, China;2. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;3. Institute of Geophysics, China Earthquake Administration, Beijing 100124, China;1. National Research Institute for Earthquake Science and Disaster Prevention, 1501-21 Nishikameya, Mitsuta, Shijimicho, Miki, Hyogo 673-0515, Japan;2. Kobe Gakuin University, 1-1-3 Minatojima, Chuoku, Kobe, Hyogo 650-8586, Japan;3. Kanto Gakuin University, 1-50-1 Mutsuurahigashi, Kanazawaku, Yokohama, Kanagawa 236-850, Japan;4. Tokyo Denki University, Hatoyama, Hikigun, Saitama 350-0394, Japan |
| |
| Abstract: | Tunnels have long been assumed to be able to withstand earthquakes and suffer little damage. However, investigations of tunnels after the Wenchuan earthquake in China revealed that over 30 tunnel linings were cracked. Different types of cracks were found in almost all the tunnel linings. In this study, a series of shaking table tests were conducted on scaled tunnel models under seismic excitations with increasing intensities. White noise sweep tests were interlaced with the seismic excitations to identify the damage in the tunnel linings. The accelerations and strains of the tunnel lining were measured. The test results are discussed based on the dominant frequencies, amplification factor, and lining strains. Furthermore, this paper presents the results of damage identification for various states of damage using the white noise sweep method. The dominant frequencies decreased with an increase of the input peak ground acceleration (PGA), which also reflected the damage of the tunnel lining. The dominant frequencies decreased by approximately 32% for an input PGA intensity of approximately 0.6 g, but the first cracks could still be visually detected. The cracks gradually propagate with the PGA increasing from 0.6 to 0.8 g. The effect of lining damage on the seismic performance of tunnel linings should be considered in the seismic design of tunnels. |
| |
| Keywords: | Tunnel lining Shaking table test Damage identification Crack |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
