预埋型钢的钢筋混凝土梁-钢柱转换节点抗震性能与设计方法研究  

Seismic performance and design method of steel column-reinforced concrete beam transfer joint with pre-embedded steel

作　　者：史燚 王伟[1] 汪士也 包联进[2] 李明[2] 童骏[2] 田云雨 SHI Yi;WANG Wei;WANG Shiye;BAO Lianjin;LI Ming;TONG Jun;TIAN Yunyu(State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;East China Architectural Design&Research Institute Co.,Ltd,Shanghai 200011,China;Zhejiang Dadi Steel Structure Co.,Ltd,Hangzhou 311200,China)

机构地区：[1]同济大学土木工程防灾减灾全国重点实验室,上海200092 [2]华东建筑设计研究院有限公司,上海200011 [3]浙江大地钢结构有限公司,浙江杭州311200

出　　处：《建筑结构学报》2024年第7期212-225,共14页Journal of Building Structures

基　　金：国家自然科学基金项目(52378182,52078366);同济大学土木工程Ⅰ类高峰学科建设经费资助(2022-3-YB-18)。

摘　　要：为解决传统型钢混凝土梁式转换结构用钢量大、吊装难度高和节点区施工复杂等问题,提出了一种预埋型钢的钢筋混凝土梁-钢柱转换节点,依托某实际工程开展了足尺模型拟静力试验;同时提出了基于ABAQUS软件考虑混凝土剥落失效导致性能退化的有限元模拟方法,并研究了单侧型钢长度、栓钉间距、混凝土强度和轴压比对转换节点抗震性能的影响。研究表明:该节点的破坏模式为核心区剪切破坏,滞回曲线饱满,延性和耗能能力良好;节点延性与单侧型钢长度呈正相关,与混凝土强度和轴压比呈负相关,栓钉间距影响较小;节点承载力和总耗能与单侧型钢长度和混凝土强度呈正相关,与栓钉间距和轴压比呈负相关。当单侧型钢长度为2倍型钢截面高度、栓钉间距为200 mm、混凝土强度等级为C40时构件可取得较好的抗震性能。根据分析结果,建立了预埋型钢的钢筋混凝土梁-钢柱转换节点受剪承载力计算式并给出了构造建议。In order to solve the problems of large steel consumption,high lifting difficulty and complicated construction of traditional steel reinforced concrete beam-type transfer structure,a steel column-reinforced concrete beam transfer joint(SCRCBTJ)with pre-embedded steel was proposed in this study and quasi-static test was conducted on full-scale joint models which were designed according to real project.At the same time,a finite element simulation method considering the performance degradation due to concrete spalling was developed based on ABAQUS.The effects of single-side structural steel length,stud spacing,concrete strength and axial compression ratio on the seismic performance of the transfer joint were studied.The results show that the failure mode of the joint is shear failure in the core area and the hysteresis curves are full with good ductility and energy dissipation capacity.The ductility is positively correlated with single-side structural steel length,negatively correlated with concrete strength and axial compression ratio,and the influence of stud spacing is small.The load capacity and total energy dissipation of the joint are positively correlated with single-side structural steel length and concrete strength,negatively correlated with stud spacing and axial compression ratio.When the single-side structural steel length is taken as two times the section height,the stud spacing is taken as 200 mm,and the concrete strength grade is taken as C40,the member achieves ideal seismic performance.According to the analysis results,the shear bearing capacity formula of the SCRCBTJ was established and construction suggestions were given.

关 键 词：RC梁-钢柱转换节点 预埋型钢 拟静力试验 有限元分析 参数分析 抗震性能 

分 类 号：TU398[建筑科学—结构工程]