内嵌式法兰连接预制拼装双柱墩参数分析

Parameter Analysis of Prefabricated Double Column Piers with Embedded Flange Connection

本文基于实际工程对内嵌式法兰连接预制拼装双柱墩参数进行了分析,将法兰设置在塑性铰区以外,设计1∶3缩尺模型,通过分析不同法兰强度等级、混凝土强度等级、轴压比和配筋率的内嵌式法兰连接预制拼装双柱墩模型,得到不同情况下推覆曲线和损伤破坏状态,分析各参数的影响。研究结果表明,法兰强度等级对结构的影响较小,配筋率对结构承载力和延性的影响较大,结构最终失效主要表现在塑性铰区域,法兰存在一定程度的翘起。

The embedded flange connection for prefabricated double piers was proposed in this paper based on actual engineering.The flange was set outside the plastic hinge region and a dimension 1∶3 scaled-down model has been designed.The pushover curve and damage state was derived through different analyze of flange strength,concrete strength,axial compression ratio,and it was applied to analyze and explain the influence of each parameter on the structure from the aspect of stress and strain state.The results show that flange strength has little effect on the structure while reinforcement ratio has great influence on the bearing capacity and ductility of the structure.The final failure of the structure is mainly in the area of flange joints.