新型装配式RC柱连接钢节点抗震性能分析  

Seismic performance analysis of new prefabricated reinforced concrete columns connected with steel joints

作　　者：汤敏 吴浩 胡亚超 席丰[1,3] 谭英华 TANG Min;WU Hao;HU Yachao;XI Feng;TAN Yinghua(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China;Key Laboratory of Building Structural Retrofitting and Underground Space Engineering(Shandong Jianzhu University),Ministry of Education,Jinan 250101,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101 [2]山东科技大学土木工程与建筑学院,山东青岛266590 [3]山东建筑大学建筑结构加固改造与地下空间工程教育部重点实验室,山东济南250101

出　　处：《山东建筑大学学报》2024年第5期37-45,53,共10页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金项目(12172198,11672165);山东省青创科技团队项目(2019KJG015)。

摘　　要：节点连接是影响装配式混凝土结构抗震性能的关键要素,亦是抗震设计的核心问题。文章针对所提出的一种适用于变截面钢筋混凝土(Reinforced Concrete,RC)柱的钢节点连接形式,通过有限元模拟,与现浇柱对比分析,评估了该节点连接形式的抗震性能,并研究新型装配式变截面RC柱在不同轴压比下的破坏形态、变形性能及耗能能力。结果表明:新型装配式RC柱和现浇柱在不同轴压比下的破坏形态相似;装配式RC柱的柱底混凝土发生压溃时,钢节点区域尚未有明显塑性变形,因此满足强节点的设计要求;装配式RC柱位移延性系数均>3,满足抗震规范要求;相同轴压比下,装配式RC柱承载和耗能能力略低于现浇柱,但变形能力优于现浇柱。Joint connection is the key factor that affects the seismic performance of prefabricated concrete structures,and is the core issue of seismic design.This paper evaluates the seismic performance of a proposed steel joint connection designed for reinforced concrete(RC)columns with variable cross-sections.Through finite element simulations and comparative analysis with cast-in-place columns,the failure mode,deformation performance,and energy dissipation capacity of the new prefabricated variable cross-section RC column under different axial compression ratios were studied.The results show that the failure mode of the new prefabricated RC column is similar to that of the cast-in-place column under different axial compression ratios;When the concrete at the bottom of the prefabricated RC column is crushed,there is no obvious plastic deformation in the steel joint area,so it meets the design requirements of strong joints;The displacement ductility coefficients of prefabricated RC columns exceed 3,which meets the requirements of the seismic code;Although the bearing and energy dissipation capacities of the prefabricated RC columns are slightly lower than those of cast-in-place columns under the same axial compression ratio,their deformation capacity is superior.

关 键 词：变截面柱 新型装配式钢节点 抗震性能 节点延性 耗能能力 

分 类 号：TU398.9[建筑科学—结构工程]