Aseismic performances of constrained damping lining structures made of rubber-sand-concrete  

作　　者：Xiancheng Mei Qian Sheng Jian Chen Zhen Cui Jianhe Li Chuanqi Li Daniel Dias 

机构地区：[1]State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,430071,China [2]University of Chinese Academy of Sciences,Beijing,100049,China [3]Key Laboratory of Water Grid Project and Regulation of Ministry of Water Resources,Changjiang Institute of Survey,Planning,Design and Research,Wuhan,430010,China [4]Laboratory 3SR,CNRS UMR 5521,Grenoble Alpes University,Grenoble,38000,France [5]School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei,23009,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2024年第5期1522-1537,共16页岩石力学与岩土工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52079133);CRSRI Open Research Program(Program SN:CKWV2019746/KY);the project of Key Laboratory of Water Grid Project and Regulation of Ministry of Water Resources(QTKS0034W23291);the Youth Innovation Promotion Association CAS.

摘　　要：Flexible damping technology considering aseismic materials and aseismic structures seems be a good solution for engineering structures.In this study,a constrained damping structure for underground tunnel lining,using a rubber-sand-concrete(RSC)as the aseismic material,is proposed.The aseismic performances of constrained damping structure were investigated by a series of hammer impact tests.The damping layer thickness and shape effects on the aseismic performance such as effective duration and acceleration amplitude of time-domain analysis,composite loss factor and damping ratio of the transfer function analysis,and total vibration level of octave spectrum analysis were discussed.The hammer impact tests revealed that the relationship between the aseismic performance and damping layer thickness was not linear,and that the hollow damping layer had a better aseismic performance than the flat damping layer one.The aseismic performances of constrained damping structure under different seismicity magnitudes and geological conditions were investigated.The effects of the peak ground acceleration(PGA)and tunnel overburden depth on the aseismic performances such as the maximum principal stress and equivalent plastic strain(PEEQ)were discussed.The numerical results show the constrained damping structure proposed in this paper has a good aseismic performance,with PGA in the range(0.2-1.2)g and tunnel overburden depth in the range of 0-300 m.

关 键 词：Constrained damping structure Aseismic performance Hammer impact tests Damping layer Peak ground acceleration Overburden depth 

分 类 号：U451.4[建筑科学—桥梁与隧道工程]