TEST RESEARCH ON THE SHOCK ABSORBING PERFORMANCE OF THE ABSORBER

摘要

For the railway bridge, not only the sufficient stiffness is required to ensure the trains run speedily and smoothly, but also the sufficient deformability capacity is required to reduce the forces caused by the earthquake action effectively, which would be one of the most critical issues of the seismic isolation technology of the railway bridge. Based on the idea of bearing function separation and the seismic design of high speed railway bridges, this paper presents a structural member called shock absorber that makes use of its plastic deformation to reduce the seismic response of the bridge. The low cycle loading experiment of the absorber was done and some appropriate results of the hysteretic behavior and energy dissipation capacity were obtained. The results show that the ductility and energy dissipation capacity of the absorber perform well and the stiffness in linear elastic phase is improved, which meets the needs of normal operation of the railway bridge.