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高墩连续刚构桥作为中国西部山区桥梁的一种常见结构形式,但目前对如何控制其在地震作用下过渡墩处的墩梁相对位移缺乏研究。该文从不同相邻联周期比的情况出发,考虑过渡墩自振周期的影响,探讨山区高墩连续刚构桥的合理设计思路,和不同限位装置对位移控制的效果。参数分析结果表明:过渡墩自振周期接近相邻联振动周期时能有效减少墩梁相对位移;过渡墩处安装叠层橡胶支座和弹塑性挡块能有效限制墩梁位移;连梁装置只在特定的周期比条件下才能发挥减小位移的作用。
As a common structural form of bridge in west mountainous area of China, continuous rigid frame bridge with high pier is lack of research on how to control the relative displacement of pier due to earthquake. In this paper, starting from the situation of different adjacent period ratio, considering the influence of the natural vibration period of the transitional pier, the reasonable design idea of continuous rigid frame bridge with high piers in mountainous area and the effect of different restriction devices on displacement control are discussed. The results of parameter analysis show that the relative displacement of pier and girder can be effectively reduced when the natural vibration period of transitional pier is close to the adjacent coupled vibration period. The displacement of pier girder can be effectively restrained by the installation of laminated rubber bearing and elastoplastic stop at the transition pier. In a specific cycle than the conditions to play to reduce the role of displacement.