可恢复功能全螺栓梁柱节点抗震性能试验  

Experimental study on seismic performance of earthquake-resilient fully bolted beam-column joint

作　　者：鲍宇 魏建鹏 郭杨[1] 田黎敏 陈东[3] BAO Yu;WEI Jian-peng;GUO Yang;TIAN Li-min;CHEN Dong(Anhui Provincial Key Laboratory of Building Earthquake Disaster Mitigation and Green Operations,Anhui Institute of Building Research&Design,Hefei 230031,China;College of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]安徽省建筑科学研究设计院安徽省建筑抗震减灾与绿色运维重点实验室,安徽合肥230031 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《振动工程学报》2024年第12期2045-2054,共10页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(52178161,51608433);安徽省建筑抗震减灾与绿色运维重点实验室(安徽省建筑科学研究设计院)开放课题资助项目(2021-JKYL-001);安徽建工集团科研立项项目(2021-19JF);安徽省住房城乡建设科学技术计划项目(2022-YF013)。

摘　　要：为了实现结构震后快速恢复功能,基于可更换和附加耗能的思想,本文提出一种可恢复功能全螺栓梁柱节点。通过设置T型耗能板解决全螺栓节点加载至大位移工况下节点耗能能力不足的缺点。研究T型耗能板耗能段长度和长细比对可恢复功能全螺栓节点抗震性能的影响,完成了3个可恢复功能全螺栓节点和1个传统全焊接节点的低周往复加载试验。试验结果表明:可恢复功能全螺栓节点的抗震性能优于传统的焊接节点;可恢复功能全螺栓节点能够集中塑性和损伤,将塑性区转移至T型耗能板上,避免梁端焊接区断裂。本文给出了耗能段长度的下限取值方法,当耗能段有足够的变形长度,且耗能段截面形状、尺寸保持不变时,长细比保守取为13.2,能够使节点具有良好的承载力和延性,并充分发挥节点的抗震性能。To achieve rapid recovery of structural function after the earthquake,based on the idea of replaceability and additional energy consumption,a new earthquake-resilient fully bolted beam-column joint is introduced in this study.The shortcoming of insufficient energy dissipation ability of the existing fully bolted joint loaded into large deformation condition is improved by setting up the T-shaped energy dissipator.The influence of the energy consumption length and slenderness ratio of the T-shaped energy dissipator on the seismic behavior of the new earthquake-resilient fully bolted joint is studied.Three new earthquake-resilient fully bolted joints and one welded joint were subjected to low-cycle loading.The results of tests show that the seismic performance of the new earthquake-resilient fully-bolted joint is better than that of the traditional welded joint.The new earthquake-resilient fully-bolted joint can concentrate the plasticity and damage,transfer the plastic zone to the T-type energy dissipation plate,and avoid the fracture of the welding zone at the beam end.In this paper,the lower limit of the length of the energy dissipation segment is given.When the energy dissipation segment has sufficient deformation length,and the cross-section area of the energy dissipation section is the same,the conservative slenderness ratio is determined to be 13.2,which can make the new joints have good bearing capacity and ductility,and give full play to the seismic performance of the new joint.

关 键 词：装配式钢结构 可恢复功能 低周往复荷载试验 滞回性能 梁柱节点 长细比 

分 类 号：TU391[建筑科学—结构工程] TU352.1