基于塑性铰转移的装配式预应力混凝土框架抗震性能分析  

Seismic performance analysis of post-tensioned prestressed precastconcrete frames based on plastic hinge relocation

作　　者：吴俊霖 杨辉 吴杰 谢磊 杨震 管东芝[3] WU Junlin;YANG Hui;WU Jie;XIE Lei;YANG Zhen;GUAN Dongzhi(School of Civil Engineering and Architecture,Jiangsu University of Science and Technology,Zhenjiang 212100,China;Zhongyifeng Construction Group Co.Ltd.,Suzhou 215021,China;School of Civil Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]江苏科技大学土木工程与建筑学院,镇江212100 [2]中亿丰建设集团股份有限公司,苏州215021 [3]东南大学土木工程学院,南京210096

出　　处：《江苏科技大学学报(自然科学版)》2025年第2期58-64,73,共8页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金面上项目(52278154);江苏省自然科学基金项目(BK20231429);江苏省大学生创新创业训练计划项目(202210289064Z);2021年江苏省产学研合作项目(BY2021115)。

摘　　要：为了解决传统装配式预应力框架梁柱节点耗能件施工困难、成本高昂等问题,提出了一种基于塑性铰转移的后张预应力装配式干式连接混凝土框架(post-tensioned precast concrete frames based on plastic hinge relocation,PPFBP).首先,基于PPFBP梁柱节点试验结果,建立相应的梁单元模型,验证了建模方法的可行性及合理性.然后,设计并建立5层PPFBP及普通现浇框架有限元模型,结合静力弹塑性分析法与动力时程分析法对PPFBP抗震性能进行分析研究.研究结果表明:新型预应力框架结构在不同侧力模式下顶点位移与基底剪力有较大的差异;在相同侧力模式下,新型预应力框架结构层间位移角均能满足规范中的限值要求,较现浇混凝土框架结构有着显著的下降,各层层间位移角变化均匀,无明显薄弱层;动力时程分析法结果与静力弹塑性分析法吻合,新型预应力框架通过合理控制塑性铰位置,使结构成为完全梁铰耗能屈服机制,具有良好的抗震性能.A post-tensioned precast concrete frames based on plastic hinge relocation(PPFBP)is proposed to solve the problems of construction difficulty and high cost of traditional prestressed precast beam-column joint.Firstly,based on the PPFBP beam-column joint test results,the corresponding fiber beam model is established to verify the feasibility and rationality of the modeling method.Then,the finite element model of five-layer PPFBP and ordinary cast-in-place frame is designed and established,and the seismic performance of PPFBP is analyzed by combining static elastoplastic analysis and dynamic time history analysis.The results show that the displacement of the new prestressed precast frame structure in the top floor and the base shear have obvious difference for the structure with different lateral force mode.Under the same lateral force mode,the interstory drift ratio of the new prestressed precast frame structures can meet the limit requirements in the code,which is significantly lower than that of the cast-in-place concrete frame structures,drift ratio of each floor changes evenly without obvious weak floor.The results of dynamic time history analysis are consistent with those of static elastoplastic analysis.By controlling the position of plastic hinge reasonably,the new prestressed frame becomes the energy dissipation yielding mechanism of beam hinge and shows excellent seismic performance.

关 键 词：塑性铰转移 装配式混凝土框架 后张预应力 静力弹塑性分析 动力时程分析 

分 类 号：TU352.1[建筑科学—结构工程]