UHTCC-混凝土组合板柱节点抗冲切承载力分析  

PUNCHING RESISTANCE OF UHTCC-CONCRETE COMPOSITE SLAB-COLUMN CONNECTIONS

作　　者：卢昱成 李庆华[1] 童精中 徐世烺[1] LU Yucheng;LI Qinghua;TONG Jingzhong;XU Shilang(Institute of Advanced Engineering Structures,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学高性能结构研究所,杭州310058

出　　处：《低温建筑技术》2022年第7期117-120,共4页Low Temperature Architecture Technology

摘　　要：利用超高韧性水泥基复合材料(UHTCC)对板柱节点核心区域的混凝土进行局部替换,能够有效提升板柱节点的抗冲切性能。对于UHTCC-混凝土组合板柱节点,目前无规范适用公式计算其极限承载力大小。文中在GB 50010-2010《混凝土结构设计规范》给出的混凝土板柱节点抗冲切承载力计算公式基础上,提出了改进公式。与Abaqus有限元模拟结果进行对比后,结果表明运用改进公式得到的UHTCC-混凝土组合板柱节点极限承载力大小理论计算值与有限元模拟值能够较好的拟合。可利用改进公式对UHTCC-混凝土组合板柱节点进行抗冲切承载力的估算。Using Ultra High Toughness Cementitious Composite(UHTCC)to partially replace the concrete in the core area of the slab-column connections can effectively improve the punching resistance of the slab-column con⁃nections.For the UHTCC-concrete composite slab-column connections,there is no applicable formula to calculate its ultimate bearing capacity size in the concrete structure design specification.Based on the calculation formula of punching resistance of concrete slab-column connections given in code for design of concrete structures GB 50010-2010,an improved formula was proposed.Compared with the finite element modelling results of Abaqus,the results show that the theoretical calculation value of ultimate bearing capacity of UHTCC-concrete composite slab-column connections obtained by using the improved formula can be well fitted with the finite element model⁃ling value.The improved formula can be used to estimate the punching resistance of UHTCC-concrete composite slab-column connections.

关 键 词：UHTCC 板柱节点 有限元模拟 抗冲切承载力 

分 类 号：TU398[建筑科学—结构工程]