文档介绍：DYNAMIC BEHAVIOR OF PORTAL PART OF TRAFFIC TUNNEL IN
HIGH-INTENSITY EARTHQUAKE AREA
SHEN Yusheng1,2 ,GAO Bo2 ,WANG Zhengzheng2 ,WANG Yingxue2
1Postdoctoral Station of Mechanics, Southwest Jiaotong University, Chengdu 610031,
China; email:******@.
2School of Civil Engineering,Southwest Jiaotong University, Chengdu 610031, China;
Abstract: A large-scale shaking table test is accomplished on the dynamic response
and failure modes of the tunnel. The result is that the largest dynamic response of
tunnel structure appears at the side-wall and the shear or fracturing damage appears
at the invert, which is basically the same damage state with tunnel engineering in
Wen Chuan earthquake. The internal force value of tunnel structure minish and
the numbers of cracks reduce after the shock absorption layer is set up in model test,
and optimize the stress state of tunnel. The surface cracks of tunnel model appear
firstly at both spandrels and develop diagonally at the tunnel entrance. The cracks
arise "X"-shape distribution on the surface of the model soil. There are a lot of