本文提出了一种抑制梁端碰撞和落梁等桥梁震害的八字形橡胶缓冲装置。在实验的基础上,建立了跨径、跨数、墩高和跨径比不同的多种简支梁桥有限元模型,分析了其在地震作用下的响应。结果表明,采用该缓冲装置后主梁梁端位移、主梁轴力、梁端碰撞力均明显减小,且跨径、墩高和边中跨比愈大效果愈好,跨数愈少效果愈好,从而充分验证了八字型橡胶缓冲装置纵向抗震效果的有效性。 This paper presents a figure-shaped rubber shock absorber that suppresses the seismic damage of bridges such as beam-end collision and drop-beam. Based on the experiments, a variety of finite element models of bridges with different span, span, pier height and span ratio are established and their response to earthquakes is analyzed. The results show that the main beam girder displacement, the main beam axial force and the beam end collision force are obviously reduced after the buffer device is used, and the greater the span, pier height and side span ratio, the better, The better, so as to fully verify the validity of the longitudinal seismic effect of the figure-shaped rubber buffer device.