建筑钢结构进展2025，Vol.27Issue(5)：19-28,10.DOI:10.13969/j.jzgjgjz.20231127001
既有混凝土梁-耗能段组合节点力学性能试验研究
Experiment Study on the Mechanical Property of a Novel Existing Concrete Beam-Shear Link Composite Connection
摘要
Abstract
By combining an existing concrete frame with a Y-shaped eccentrically steel brace,an innovative existing reinforced concrete-Y-shaped eccentrically steel brace structure with high lateral stiffness,good seismic performance and seismic resilience capacity was developed,and the existing concrete beam-shear link(ECB-SL)composite connection was a key point to achieve the expected seismic performance of the innovative structure.In this paper,specimens with endplate connection,U shape-side plate connection,U shape-angle connection and U shape-three side bolted connection,respectively,were studied by the cyclic loading tests,and the failure modes,hysteresis curves,skeleton curves,secant stiffness,energy dissipation capacity and load-strain curves were investigated.The test results show that the unexpected failure modes of specimens were anchor bolts tension or concrete cracking,so these composite connections cannot have enough bearing capacity.Specimen experienced a failure mode of link yielding,link buckling,concrete cracking,crack propagation,and link fracture.The failure mode,overstrength factor and inelastic rotation of the specimen were the same as those of the pure very short shear link,which was recommended in the design of ECB-SL composite connections.关键词
既有混凝土梁/Y形偏心钢支撑/短剪切型耗能段/力学性能/滞回曲线Key words
existing concrete beam/Y-shaped eccentrically steel brace/very short shear link/mechanical property/hysteresis curve分类
建筑与水利引用本文复制引用
黄昆,曾思智,孙志颖,胡淑军..既有混凝土梁-耗能段组合节点力学性能试验研究[J].建筑钢结构进展,2025,27(5):19-28,10.基金项目
国家自然科学基金(52468025、51908268),江西省自然科学基金(20224BAB204062),江西省地质局青年科学技术带头人培养计划项目(2022JXDZKJRC09),江西省主要学科学术和技术带头人培养项目(20232BCJ23065) （52468025、51908268）
