This paper aims to study the longitudinal seismic performance of continuous pipes in underground precast utility tunnels.A refined finite element model for the seismic analysis of soil-utility-tunnel-pipe system was established,and the seismic responses of straight utility tunnel-welded steel pipe system under different an-gles of seismic wave incidence were studied.It was shown that as the incidence angle of seismic waves increa-ses,the axial force of welded steel pipes gradually increases,reaching its peak at an incidence angle of 60°.The peak shear force shows a trend of first decreasing and then increasing with the increase of incident angle,with the smallest at an incident angle of 45° and the maximum at an incident angle of 0°.The peak bending mo-ment of the pipes gradually decreases with the increase of seismic wave incidence angle,reaching its peak at in-cidence angle of 0°.
维普
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