Abstract：Aimed at the transverse pounding phenomenon between girder and retainer of girder bridges under earthquake excitation, the primary factors which affect pounding effects were studied systematically by nonlinear dynamical analysis. Based on the pounding theory of rigid body, the contact element analysis model of transverse pounding which could take into account energy dissipation was established to discuss the influence of pounding stiffness, the length of initial gap, pier height as well as beam span on pounding effects of railway RC girder bridges under typical shallow source earthquake. The results show the transverse seismic retainer is an effective measure to forefend beams from falling from piers. The rational parameter value of pounding stiffness and length of initial gaps was suggested, and the influence rule of pier height and beam span were essentialized. The above research achievement can provide reference for the seismic design of girder bridge and the revision of seismic design codes.
2012, Vol. 31 
