(1 河南科技大学土木工程学院, 洛阳 471023; 2 洛阳理工学院土木工程学院河南新型土木工程结构国际联合实验室, 洛阳 471023; 3 武汉理工大学理学院, 武汉 430070)

摘要: 螺栓连接偏心支撑钢框架可以实现工厂预制并现场安装的施工模式,与传统焊接偏心支撑相比,其震后替换耗能梁段更方便快捷. 为了研究震后替换耗能梁段对偏心支撑钢框架抗震性能的影响,先对一个螺栓连接偏心支撑钢框架进行拟静力循环加载,在第一次试验的基础上,保持其他构件不变,仅替换损坏的耗能梁段进行再次试验,并从滞回曲线、承载力、延性、耗能等方面分析了两次试验的抗震性能差异. 研究结果表明:震后替换耗能梁段的模型的承载力、延性系数和耗能梁段转动能力与原模型相比并无明显差别,其耗能能力下降明显. 由于螺栓滑移的影响,两次试验的滞回曲线均呈“梭”形.

关键词: 螺栓连接; 偏心支撑钢框架; 替换耗能梁; 拟静力试验; 抗震性能

中图分类号:TU391 文献标志码:A 文章编号:1002-848X(2022)05-0063-07

DOI:10. 19701 / j. jzjg. 20200869

Influence of post-earthquake replacement beam link with energy-dissipation on seismicperformance of eccentrically braced steel frame

LI Tong1, WANG Xinwu2, SHI Qiang2,3, BU Xin2, SUN Haisu2

(1 School of Civil Engineering, Henan University of Science & Technology, Luoyang 471023, China;2 Henan International Joint Laboratory of New Civil Engineering Structure, Luoyang Institute of Science and Technology,Luoyang 471023, China; 3 School of Science, Wuhan University of Science and Technology, Wuhan 430070,China)

Abstract: Bolted link of eccentrically braced steel frame can realize the construction mode of factory prefabrication and spotinstallation. Compared with traditional welding eccentrically braced steel frame, it is more conveniently and quickly toreplace link after earthquake. In order to study the influence of the post-earthquake replacement beam link withenergy-dissipation on seismic performance of eccentrically braced steel frame, the pseudo-static cyclic loading of a boltedlink eccentrically braced steel frame was carried out. On the basis of the first test, the other components were unchanged,only the damaged beam link with energy-dissipation was replaced to test again. The differences of seismic performancebetween the two tests were analyzed from hysteretic curve, bearing capacity, ductility and energy consumption. The resultsof research show that the bearing capacity, ductility and rotation capacity of the replacement beam link withenergy-dissipation after earthquake are not significantly different from the original model, but the energy-dissipating capacitydecreases significantly. Due to the effect of bolt slip, the hysteretic curves of both tests are in the shape of " shuttle" .

Keywords:bolted link; eccentrically braced steel frame; replacement beam link with energy-dissipation; pseudo-statictest; seismic performance

∗国家自然科学基金项目(51678284) ,河南省科技创新杰出人才项目(184200510016) .

第一作者:李通,硕士研究生,主要从事钢结构和组合结构研究,Email:ligen2209@ 163. com.

[引用本文] 李通,王新武,时强,等. 震后替换耗能梁段对偏心支撑钢框架的抗震性能影响[ J] . 建筑结构,2022,52( 5 ) : 63-69. LI Tong, WANG Xinwu, SHI Qiang, et al. Influence of post-earthquake replacement beam link withenergy-dissipation on seismic performance of eccentrically braced steel frame[ J] . Building Structure,2022,52(5) :63-69.