Experimental study on seismic dynamic response of bridge-tunnel lap under multi-direction seismic loads

doi:10.16265/j.cnki.issn1003-3033.2018.09.015

Abstract

Abstract: In order to explore the seismic dynamic response characteristics of weak rock at bridge-tunnel lap under multi-directional seismic loads, shaking table model tests with a scale of 1∶50 were carried out. Wenchuan wave was taken as the test loading seismic wave, the acceleration amplification coefficient values of each measuring point in the link of bridge and tunnel under different loading modes were tested, and the characteristics of the vertical, horizontal and vertical acceleration responses of the link were analyzed, so as to clarify the influences of seismic waves in different directions on the structure of the link. The results show that the acceleration produced by transverse seismic waves is larger than the acceleration produced by vertical seismic waves, that the acceleration responses of longitudinal and lateral two-way coupling earthquakes are generally greater than those of other coupling modes, and that the longitudinal and lateral acceleration responses induced by two-way seismic coupling are greater than those by single earthquakes.

Key words: tunneling engineering, weak rock, bridge-tunnel lap, earthquake, shaking table test, dynamic response

CLC Number:

X915.5

XIE Zhongqiu, JIANG Lianzi, SUN Guangchen, DENG Feixiu. Experimental study on seismic dynamic response of bridge-tunnel lap under multi-direction seismic loads[J]. China Safety Science Journal, 2018, 28(9): 87-91.

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