论文部分内容阅读
曲线桥在地震作用下的垮塌破坏多与相邻梁间的碰撞有关,在纵向设置抗震锚栓可有效的防止落梁,目前国内还缺乏对此方面的研究。本文以某3跨曲线梁桥为工程背景建立空间有限元模型,对曲线梁桥在地震作用下的墩梁相对位移、墩底内力等关键地震响应进行了对比分析。研究表明:纵横向碰撞是曲线桥必须考虑的重要因素,设置抗震锚栓能有效缓解曲线桥梁的碰撞效应。
The failure and collapse of curve bridge under earthquake are mostly related to the collision between adjacent beams. Seismic anchors in the longitudinal direction can effectively prevent the falling beams. At present, there is a lack of research in this area. In this paper, a 3-span curved girder bridge is established as a project background to establish the space finite element model, and the key seismic responses of the curved girder bridge under the action of earthquake, such as the relative displacement of the pier and the pier bottom, are compared and analyzed. The research shows that the longitudinal and transverse collisions are the important factors which must be considered in the curve bridge. Setting the seismic anchor can effectively mitigate the collision effect of the curve bridge.