地震作用下双柱式高低墩力学行为研究

Study on Mechanical Behavior of Double-Column High and Low Piers Under Earthquake

为提高双柱式高低墩的设计合理性,结合桥梁在工程中不同墩高组合的情况,通过建立全桥有限元模型,计算分析了地震作用下双柱式高低墩的力学行为,得到其基本变化规律。计算发现双柱式高低墩的墩高差对墩顶位移、墩底内力均有比较明显的影响,设计中应重视双柱式高低墩的配筋设计。

In order to improve the design rationality of double-column high and low piers,combined with the different pier height combinations of the bridge in engineering,the mechanical behaviour of double-column high and low piers under earthquake action was calculated and analyzed by establishing the finite element model of the whole bridge,and the basic variation law of its mechanical behavior was obtained.The calculation shows that the height difference of double-column high and low piers has obvious influence on the displacement of the pier top and the internal force of the pier bottom.The design should pay attention to the reinforcement design of double-column high and low piers.