预制拼装预应力混凝土桥墩力学性能研究

Study on Mechanical Properties of Prefabricated Prestressed Concrete Piers

为深入探究预制拼装预应力混凝土桥墩在水平往复荷载作用下的力学性能,通过有限元软件对以往试验进行了模拟,验证了预制拼装预应力混凝土桥墩模型的合理性与有效性。以此为基础,通过改变长细比与耗能钢筋配筋率等参数建立了9个预制拼装混凝土桥墩模型,分析了桥墩力-位移滞回曲线等力学性能。结果显示,桥墩长细比的增加导致其承载力降低;耗能钢筋配筋率增加,桥墩的耗能能力增加,但桥墩发生损伤,残余位移也随之增大。因此,合理控制桥墩的长细比与配筋率可以使该类桥墩拥有较好的承载和耗能能力。

In order to explores the mechanical properties of prefabricated prestressed concrete piers under horizontal cyclic loads in-depth,the previous experiments were simulated by finite element software,and the rationality and effectiveness of the prefabricated prestressed concrete pier model were verified.Based on this,nine prefabricated concrete pier models were established by changing the slenderness ratio and the reinforcement rate of energy-consuming reinforcement,and the mechanical properties such as the force-displacement hysteresis curve ofthe piers was analyzed.The Results show that the increase in the length ratio ofthe pier leads to a decrease in its bearing capacity;The reinforcement rate of energy-consuming reinforcement increases,and the energy-consuming capacity of the pier increases,while the residual displacement also increases.So reasonable control of the length ratio and reinforcement ratio of the pier can make this type of pier have a good bearing capacity and energy consumption capacity.