建筑结构学报2025，Vol.46Issue(9)：73-85,13.DOI:10.14006/j.jzjgxb.2024.0413
腹板角钢连接高强钢震后可恢复梁柱节点抗震性能研究
Research on seismic performance of high-strength steels earthquake resilient beam-column joint connected by web angles
摘要
Abstract
Aiming at the shortcomings of the current earthquake resilient structure with insufficient seismic performance,a high-strength steel earthquake resilient beam-column joint connected by the ordinary angles,C-shaped angles and C-shaped stiffened angles connected joint were designed,and low-cycle reversed loading tests and finite element simulations were carried out.The research results indicate that plastic strain is mainly concentrated in the flange cover plate and angle during the loading process,while the beam and column maintain basic elasticity.With the strengthening of the angle,its plastic yield area gradually expands from the center of the angle to the bolted connection areas on both sides,and the bearing capacity significantly increases.Compared with ordinary angles connected joint,C-shaped angles connected joint have a 12％increase in carrying capacity,while C-shaped stiffened angles connected joints have a 30.4％increase in carrying capacity.When the loading displacement reaches the ultimate displacement of the ductile steel frame,the residual deformation of the joint is much lower than the threshold of the structure for replaceable residual displacement of the structure by 0.5％.By replacing the damaged elements,the peak load can reach 96％of its capacity before replacement,and its initial stiffness can reach 98％of its capacity before replacement,indicating that the joint has excellent post earthquake recoverable performance.A refined finite element model considering ductile damage of steel was established,and the calculation method for the yield load of C-shaped angle connection joints was determined.Through the comparison of thetheory,finite element analysis,and experimental bearing capacity of joint,it was found that the error of the three methods was within 10％,which verified the accuracy of the yield load calculation method and finite element model.On this basis,the section strength ratio was proposed for joint damage control.After parameter analysis,it was found that when the section strength ratio is not greater than 96.5％,it can ensure that the main components of the beam-column maintain elasticity.关键词
震后可恢复节点/损伤元/高强钢/加强腹板角钢/低周往复试验/截面强度比Key words
earthquake resilient joint/damage element/high-strength steel/reinforced web angle/low-cycle reversed loading test/section strength ratio分类
建筑与水利引用本文复制引用
郭宏超,郑东东,周旭东,刘云贺..腹板角钢连接高强钢震后可恢复梁柱节点抗震性能研究[J].建筑结构学报,2025,46(9):73-85,13.基金项目
国家自然科学基金项目(52378197),陕西省杰出青年基金项目(2021JC-41),西安理工大学博士创新基金(252072301). （52378197）
