Damage Analysis of Girder Bridge Under Near-fault Pulse-like Earthquake Motion Considering Wave Propagation Effect
During the initial phase of near-fault seismic excitation,the input ground motion propagates inside the structure from bot-tom to top in the form of waves,but the influence of the wave propagation effect on the seismic damage process of girder bridge struc-tures under the action of near-fault pulse-type ground motion is not clear.In this paper,numerical analysis method is utilized to study the failure process and failure mechanism of a three-span girder bridge under the action of near-fault pulse-type earthquake considering the wave propagation effect.The results show that the development of the curvature of the bridge pier section is reasonable enough dur-ing the seismic excitation process.The bearing at the pier top shows great aseismic capability,the allowable shear displacement of the abutment is the weak point of the whole girder bridge system.Thus,it is important to guarantee a reasonable allowable shear displace-ment for the abutment of girder bridges located in the near-fault region.Our results provide a reference value for the seismic design of girder bridges in near-fault regions.
万方数据
维普
