摘要
为提高钢框架梁柱节点的抗震性能,实现震后耗能板件的快速更换,提出一种屈曲约束耗能板连接的钢框架节点,其由带悬臂梁段的钢柱、中间梁段、屈曲约束耗能板及腹板拼接板采用高强度螺栓组装而成,通过低屈服点钢耗能板的塑性变形耗能,集中损伤,使得梁柱主体构件基本处于弹性状态,震后更换屈曲约束耗能板即可实现结构功能快速恢复。通过对8个足尺钢框架梁柱子结构试件的循环加载试验,获得各试件的破坏过程,分析其滞回曲线、应变发展、延性及耗能能力等。结果表明:屈曲约束耗能板连接的钢框架梁柱子结构试件的破坏模式主要表现为耗能板过渡段的屈曲;适当减小耗能板厚度或增大耗能板长度,有利于损伤集中于屈曲约束耗能板;子结构试件具有良好的延性和耗能能力,且存在残余变形的情况下仍可较方便地拆卸和安装,屈曲约束耗能板更换前后子结构试件的滞回性能相当,说明屈曲约束耗能板连接的钢框架节点具有良好的功能可恢复性。
To improve the seismic performance of steel frame beam column connections and enable the rapid replacement of energy dissipation plates after earthquakes,a steel frame connection with buckling restrained energy dissipation plates has been proposed.This connection consists of a steel column with a cantilever beam and an intermediate beam.These components were assembled using high-strength bolts that connect through buckling restrained energy dissipation plates and web splicing plates.This connection was designed to concentrate damage and dissipate energy through the plastic deformation of low-yield-point steel energy dissipation plates,thereby preserving the main components of beams and columns in an elastic state.The structural function can be quickly restored by replacing the buckling restrained energy dissipation plates after an earthquake.Cyclic loading tests were conducted on eight full-scale steel frame substructure specimens to study the failure process of each specimen and analyze their hysteresis curves,strain development,ductility,and energy dissipation capacity.The results indicate that the failure mode of the proposed connection is mainly characterized by buckling deformation of the transition section of the energy dissipation plate.Reducing the thickness or increasing the length of the energy dissipation plate is beneficial for concentrating damage on the buckling restrained energy dissipation plate.The connection specimens exhibit good ductility and energy dissipation capacity,and the buckling restrained energy dissipation plates can be easily disassembled and installed even with residual deformation.The hysteresis performance of the specimens before and after the replacement of the buckling restrained energy dissipation plates is comparable,indicating that the steel frame connection with buckling restrained energy dissipation plates has good functional recoverability.
作者
徐莹璐
张博
田黎敏
钟炜辉
XU Yinglu;ZHANG Bo;TIAN Limin;ZHONG Weihui(School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi'an 710055,China)
出处
《建筑结构学报》
北大核心
2025年第11期172-182,共11页
Journal of Building Structures
基金
国家自然科学基金项目(52408208,52178161)
西部装配式建筑工业化协同创新中心科学研究计划(N202207)
西安建筑科技大学首批“三百计划”科教融合课程(KC2024KJRH38)。
关键词
钢框架节点
屈曲约束耗能板
可更换
拟静力试验
抗震性能
steel frame connection
buckling restrained energy dissipation plate
replacement
quasi-static test
seismic performance
