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(1 蘇州科技大學(xué)江蘇省結(jié)構(gòu)工程重點(diǎn)實(shí)驗(yàn)室, 蘇州 215011;2 浙江交通職業(yè)技術(shù)學(xué)院橋隧工程研究所, 杭州 311112)

摘要: 為研究連續(xù)曲線雙箱鋼-混組合梁的彎扭性能,以實(shí)際工程為背景,以曲線半徑和橫隔板連接方式為參數(shù),設(shè)計(jì)了 3 根 1 ∶10 的縮尺模型,并對(duì)其進(jìn)行靜力加載試驗(yàn),研究試驗(yàn)梁跨中截面的荷載-撓度曲線、橫向撓度分布和鋼梁與混凝土板間的相對(duì)滑移規(guī)律. 結(jié)果表明,3 根梁的破壞形式一致,均為彎扭破壞,負(fù)彎矩區(qū)在 0. 1Pu( Pu 為極限荷載)時(shí)就會(huì)開(kāi)裂;極限荷載時(shí),試驗(yàn)梁跨中截面外側(cè)撓度達(dá)內(nèi)側(cè)的 1. 37 倍;試驗(yàn)梁的抗彎剛度和抗扭剛度均隨著曲線半徑的增大而提高,橫隔板連接方式對(duì)其彎扭性能影響不大;混凝土板與鋼梁結(jié)合面切向滑移隨著曲線半徑的增大而減小,橫向栓接試驗(yàn)梁的滑移量小于橫向焊接試驗(yàn)梁的;切向滑移量最大值出現(xiàn)在跨度的 3 / 4 處,徑向滑移量最大值出現(xiàn)在中支點(diǎn)附近處.

關(guān)鍵詞: 雙箱鋼-混組合梁; 橫隔板連接方式; 曲線半徑; 彎扭性能; 滑移

中圖分類號(hào):TU398 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)03-0124-06

DOI:10. 19701 / j. jzjg. LS210213

Experimental study on bending and torsion performance of continuous curved double-boxsteel-concrete composite beams

YUAN Xiaojing1, LIU Fan1, ZHAO Wei2, HUANG Haibing1, HAO Hao1

(1 Key Laboratory of Structural Engineering of Jiangsu Province, Suzhou University of Science and Technology,Suzhou 215011, China; 2 Bridge and Tunnel Engineering Research Institute,Zhejiang Institute of Communications, Hangzhou 311112, China)

Abstract: In order to study the bending and torsion performance of continuous curved double-box steel-concrete compositebeams, taking the actual engineering as the background and taking curve radius and connection method of transversediaphragm as parameters, three scaled 1 ∶ 10 models were designed and static loading tests were carried out. Theload-deflection curve and lateral deflection distribution of the mid-span section of the test beam and the law of relative slipbetween the steel beam and the concrete slab were studied. The results show that the failure modes of the three beams arethe same, all of which are bending and torsion failures and the negative bending moment zone will crack at 0. 1Pu(Puis theultimate load) . Under ultimate load, the outer deflection of the mid-span section of the test beam is 1. 37 times that of theinner side. The bending stiffness and torsion stiffness of the test beam both increase with the increase of the curve radius.The connection method of transverse diaphragm has little influence on the bending and torsion performance. The tangentialslip of the interface between concrete slab and steel beam decreases with the increase of the curve radius. The slip of thelateral bolted test beam is smaller than the lateral welded test beam. The maximum tangential slip appears at 3 / 4 of thespan and the maximum radial slip appears near the middle fulcrum.

Keywords:double-box steel-concrete composite beam; connection method of transverse diaphragm; curve radius; bendingand torsion performance; slip

∗江蘇省建設(shè)系統(tǒng)科技項(xiàng)目(2020ZD08) ,浙江省交通運(yùn)輸廳科技項(xiàng)目(2018042) .

第一作者:袁曉靜,碩士,實(shí)驗(yàn)師,主要從事混凝土結(jié)構(gòu)及組合結(jié)構(gòu)性能研究,Email: xiaojing0318006@ 126. com.

[引用本文] 袁曉靜,劉凡,趙偉,等. 連續(xù)曲線雙箱鋼-混組合梁彎扭性能試驗(yàn)研究[ J] . 建筑結(jié)構(gòu),2022,52( 3) :124-129. YUAN Xiaojing, LIU Fan, ZHAO Wei, et al. Experimental study on bending and torsion performance ofcontinuous curved double-box steel-concrete composite beams[ J] . Building Structure,2022,52(3) :124-129.