UHPC连接节段拼装桥墩拟静力试验

Quasi-static Testing of Prefabricated Assembly Pillars Connected with UHPC

UHPC具有良好的力学性能,通过合理设计可以保证钢筋和UHPC之间的有效连接。以实际工程为背景,针对UHPC连接节段拼装桥墩的新型连接构造进行拟静力试验研究。制作2个1:2.5的大比例缩尺模型,分析UHPC连接节段拼装桥墩的抗震性能,主要包括损伤状态、水平抗力、残余位移和滞回耗能能力等抗震性能参数,并将实验结果和有限元计算结果进行比较和讨论。结果表明,UHPC连接节段拼装桥墩破坏模式为非接缝区的弯曲破坏,且试验结果与有限元计算结果基本一致。

UHPC has excellent mechanical properties and effective connection between bar and UHPC can thus be ensured through proper design.In the context of an actual project,quasi-static testing of prefabricated assembly pillars connected with UHPC is proposed.Two large-scale test models with scale factor of 1:2.5 are produced to analyse the sesimic performance of prefabricated assembly pillars connected with UHPC,including damage states,horizontal resistance capability,residual deformation and energy dissipation capacity.Experimental results and finite element calculation results are compared and discussed.Results show that the failure mode of the prefabricatedassembly pillarsis the flexural failure of the non-joint zone and the test results demonstrate good consistence with the finite element calculation results.