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(1 湖南科技大學(xué)湖南省智慧建造裝配式被動(dòng)房工程技術(shù)研究中心, 湘潭 411201;2 湖南城建職業(yè)技術(shù)學(xué)院, 湘潭 410004; 3 湖南建工集團(tuán)有限公司, 長沙 410004)

摘要: 為研究帶 T 形肋剪力鍵的鋼-混凝土組合梁的承載力和破壞機(jī)理,對(duì) 7 個(gè)鋼-混凝土組合梁試件進(jìn)行了受彎性能試驗(yàn). 以貫穿鋼筋直徑、開孔間距及開孔孔徑為參數(shù),分析了試件的破壞形態(tài)、應(yīng)變分布、鋼板與混凝土相對(duì)滑移量和受彎承載力. 試驗(yàn)結(jié)果表明:大部分試件發(fā)生彎曲破壞,呈現(xiàn)出明顯的延性破壞特征,其余試件發(fā)生彎剪破壞;開孔孔徑和貫穿鋼筋直徑是影響試件受彎承載力的主要因素,而開孔間距對(duì)鋼板與混凝土之間的相對(duì)滑移影響顯著,開孔孔徑 40mm 和貫穿鋼筋直徑 10mm 為最優(yōu)抗彎組合. 基于試驗(yàn)結(jié)果,采取合理假定,并引入受彎承載力折減系數(shù) φ1 、φ2 來考慮對(duì)受彎承載力的影響,給出了帶 T 形肋剪力鍵的鋼-混凝土組合梁受彎承載力計(jì)算方法. 經(jīng)對(duì)比,計(jì)算值均小于試驗(yàn)值,具有一定安全儲(chǔ)備.

關(guān)鍵詞: 鋼-混凝土組合梁; 剪力鍵; 破壞機(jī)理; 界面滑移; 受彎承載力

中圖分類號(hào):TU398 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):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

∗湖南省教育廳優(yōu)秀青年項(xiàng)目( 19B188),湖南省自然科學(xué)基金青年基金項(xiàng)目( 2018JJ3161),湖南省研究生科研創(chuàng)新項(xiàng)目(CX20190802),湖南建工集團(tuán)基礎(chǔ)研究項(xiàng)目(JGJTK-2018003).

第一作者:陳思程,碩士,主要從事基于新材料的既有結(jié)構(gòu)修復(fù)與加固研究,Email:634891381@ qq. com.

[引用本文] 陳思程,黃海林,鄧軒,等. 帶 T 形肋剪力鍵的鋼-混凝土組合梁受彎性能試驗(yàn)及理論分析[ J]. 建筑結(jié)構(gòu),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.