预应力装配梁柱节点耗能套筒的设计与性能分析  

Design and performance analysis of a dissipative sleeve for precast prestressed beam-column joints

作　　者：杨杨 徐赵东[1,2] 董尧荣[3,4] YANG Yang;XU Zhaodong;DONG Yaorong(School of Civil Engineering,Southeast University,Nanjing 210096,China;China-Pakistan Belt and Road Joint Laboratory on Smart Disaster Prevention of Major Infrastructures,Southeast University,Nanjing 210096,China;School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China;Key Lab of Structural Engineering&Earthquake Resistance of the Ministry of Education,Xi’an University of Architecture&Technology,Xi’an 710055,China)

机构地区：[1]东南大学土木工程学院,江苏南京210096 [2]东南大学中国-巴基斯坦重大基础设施智慧防灾“一带一路”联合实验室,江苏南京210096 [3]西安建筑科技大学土木工程学院,陕西西安710055 [4]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《建筑结构学报》2023年第1期310-318,共9页Journal of Building Structures

基　　金：国家重点研发计划政府间国际合作专项项目(2019YFE0121900);国家自然科学基金项目(52130807);长江学者奖励计划;“科学探索奖”。

摘　　要：为了提高预应力装配结构的整体耗能能力和节点连接可靠性,设计了一种适用于预应力装配结构梁柱节点连接的耗能套筒,其利用套筒对节点区域的混凝土进行约束,并采用耗能性能良好的黏弹性材料进行耗能。对该耗能套筒基本工作原理及具体安装过程进行了阐述,利用OpenSEES软件对该耗能套筒进行数值分析,采用等效模型对弧形黏弹性阻尼器进行模拟,通过零长度单元释放梁端刚度来模拟预应力梁柱节点的半刚度特性。对带耗能套筒的预应力装配梁柱节点、现浇梁柱节点和预应力装配梁柱节点的滞回特性进行了对比研究。建立六层框架结构模型,分别采用上述三种节点连接方式,进行了地震作用下的时程分析并对比了不同节点连接方式下框架结构的地震响应。结果表明:带耗能套筒的预应力装配梁柱节点相比于预应力装配梁柱节点耗能能力提升了203%,相比于现浇梁柱节点可恢复性能提升了86%;利用耗能套筒进行节点连接的框架结构具备类似现浇结构的抗震性能和整体性能。To improve the overall energy dissipation capacity and joint connection reliability of precast prestressed structures, an energy dissipation sleeve was designed for beam-column connections used in precast prestressed structures. The energy dissipation sleeve was designed by using sleeves to restrict the concrete in the joint area, and then combining with viscoelastic material with good energy dissipation performance. The basic working principle and specific installation process were described. A numerical analysis of the energy dissipation sleeve was carried out by using OpenSEES software. An equivalent model was used to simulate the arc viscoelastic damper, and a zero-length element was used to release the beam end stiffness to simulate the semi-rigid property of the prestressed beam-column joint. The hysteretic characteristics of the precast prestressed beam-column joint with energy dissipation sleeve, the cast-in-suit beam-column joint and the precast prestressed beam column joint were compared. A six-story frame structure model with the three joint connection types was established, and time history response analysis was carried out. The seismic responses of the frame structure with different joint connection forms were compared. The results show that the energy dissipation capacity of the beam-column joint with the dissipative sleeve is improved by 203% compared with that of the precast prestressed beam column joint, and the resiliency performance is improved by 86% compared with that of cast-in-site beam-column joint. The frame structure with beam-column joints connected by the dissipative sleeve has the seismic performance and integrity similar to the cast-in-site structure.

关 键 词：预应力装配结构 梁柱节点 耗能套筒 耗能能力 可恢复性能 数值分析 

分 类 号：TU352.1[建筑科学—结构工程]