(1 湖南科技大学湖南省智慧建造装配式被动房工程技术研究中心, 湘潭 411201;2 湖南城建职业技术学院, 湘潭 410004; 3 湖南建工集团有限公司, 长沙 410004)

摘要: 为研究带 T 形肋剪力键的钢-混凝土组合梁的承载力和破坏机理,对 7 个钢-混凝土组合梁试件进行了受弯性能试验. 以贯穿钢筋直径、开孔间距及开孔孔径为参数,分析了试件的破坏形态、应变分布、钢板与混凝土相对滑移量和受弯承载力. 试验结果表明:大部分试件发生弯曲破坏,呈现出明显的延性破坏特征,其余试件发生弯剪破坏;开孔孔径和贯穿钢筋直径是影响试件受弯承载力的主要因素,而开孔间距对钢板与混凝土之间的相对滑移影响显著,开孔孔径 40mm 和贯穿钢筋直径 10mm 为最优抗弯组合. 基于试验结果,采取合理假定,并引入受弯承载力折减系数 φ1 、φ2 来考虑对受弯承载力的影响,给出了带 T 形肋剪力键的钢-混凝土组合梁受弯承载力计算方法. 经对比,计算值均小于试验值,具有一定安全储备.

关键词: 钢-混凝土组合梁; 剪力键; 破坏机理; 界面滑移; 受弯承载力

中图分类号:TU398 文献标志码:A 文章编号:1002-848X(2023)03-0072-08

DOI:10. 19701 / j. jzjg. 20201040

Experimental and theoretical analysis on flexural performance of steel-concrete composite beams with T-section rib shear connector

CHEN Sicheng1,2, HUANG Hailin1, DENG Xuan1, ZHANG Mingliang3

(1 Hunan Engineering Research Center for Intelligently Prefabricated Passive House, Hunan University of Scienceand Technology, Xiangtan 411201, China; 2 HuNan Urban Construction College, Xiangtan 410004, China;3 Hunan Construction Engineering Group Co. , Ltd. , Changsha 410004, China)

Abstract: In order to research the bearing capacity and failure mechanism of steel-concrete composite beams with T-sectionrib shear connector, seven steel-concrete composite beam specimens were tested for flexural performance. Taking thediameter of the penetrating steel bar, the opening hole spacing and the opening hole diameter as parameters, the failurepattern, strain distribution, relative slip between steel plate and concrete and flexural bearing capacity of the specimenswere analyzed. The test results show that most of the specimens fail in bending mode and present characteristics of ductilefailure, and other specimens fail in bending and shearing mode. The opening hole diameter and diameter of the penetratingsteel bar are the main factors that affect the flexural bearing capacity, and the opening hole spacing has a paramountinfluence on relative slip between steel plate and concrete,opening hole diameter of 40mm and the penetrating steel bardiameter of 10mm are the optimal combination for enhancing flexural bearing capacity. Based on the test results, rationalassumption was adopted, and the flexural bearing capacity discount factor φ1and φ2 was introduced to consider the impactof flexural bearing capacity, the calculation method of flexural bearing capacity of steel-concrete composite beam withT-section rib shear connector was given. The calculated value is less than the test value through comparison, which hascertain safety reserve.

Keywords:steel-concrete composite beam; shear connector; failure mechanism; interface slip; flexural bearing capacity

∗湖南省教育厅优秀青年项目( 19B188),湖南省自然科学基金青年基金项目( 2018JJ3161),湖南省研究生科研创新项目(CX20190802),湖南建工集团基础研究项目(JGJTK-2018003).

第一作者:陈思程,硕士,主要从事基于新材料的既有结构修复与加固研究,Email:634891381@ qq. com.

[引用本文] 陈思程,黄海林,邓轩,等. 带 T 形肋剪力键的钢-混凝土组合梁受弯性能试验及理论分析[ J]. 建筑结构,2023,53(3):72-79. CHEN Sicheng,HUANG Hailin,DENG Xuan,et al. Experimental and theoretical analysis onflexural performance of steel-concrete composite beams with T-section rib shear connector[J]. Building Structure,2023,53(3):72-79.