河南科技大学学报（自然科学版）2025，Vol.46Issue(1)：68-79,12.DOI:10.15926/j.cnki.issn1672-6871.2025.01.009
可更换梁段翼缘开孔型节点抗震性能
Seismic Performance of Joint with Replaceable Perforated-flange Beam Segment
摘要
Abstract
To achieve the outward displacement of plastic hinges under seismic action and the rapid repair of post-earthquake structures,a joint with replaceable perforated-flange beam segment was proposed.Experiments were conducted on the joint with replaceable perforated-flange beam segment under low-reversed cyclic loading to study the seismic performance of the joint.The hysteresis curve,skeleton curve,ductility coefficient,equivalent viscous damping coefficient curve,and stiffness degradation curve of the joint were obtained.Additionally,a variable parameter analysis of the perforated diameter with different beam-column cross-sectional dimensions was performed by finite element software.The results indicate that the joint allows for the outward displacement of the beam end plastic hinge to the weakened place of the perforated-flange,and exhibits good bearing capacity,ductility,and rapid repair capability after earthquake.With the increase of the perforated diameter,the ductility,energy dissipation capacity,and stiffness of the joint gradually decrease,but all still meet the seismic performance requirements.It is recommended that the degree of perforated weakening is 0.20～0.35.After changing the beam-column cross-sectional dimensions,it is found that if the degree of perforated weakening is maintained between 0.20～0.35,the joint with replaceable perforated-flange beam segment in different beam-column cross-sectional dimensions can still meet the seismic performance requirements,and the ultimate load capacity is reduced by no more than 10%.关键词
可更换梁段/翼缘开孔/梁柱节点/抗震性能/试验研究/有限元分析Key words
replaceable beam segment/perforated-flange/beam-column joint/seismic performance/experimental investigation/finite element analysis分类
建筑与水利引用本文复制引用
熊晓莉,李飞平,张宇,海闯..可更换梁段翼缘开孔型节点抗震性能[J].河南科技大学学报（自然科学版）,2025,46(1):68-79,12.基金项目
国家自然科学基金项目(51308194) （51308194）
河南省科技攻关项目(212102310562) （212102310562）
