- 摘 要
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（1 廣西大學(xué)土木建筑工程學(xué)院， 南寧 530004； 2 廣西科技大學(xué)土木建筑工程學(xué)院， 柳州 545006； 3 南寧市審計(jì)局， 南寧 530022； 4 廣西大學(xué)工程防災(zāi)與結(jié)構(gòu)安全教育部重點(diǎn)實(shí)驗(yàn)室， 南寧 530004）
［摘要］為研究焊接栓釘型鋼混凝土梁的受扭性能，設(shè)計(jì)并完成了7根焊接栓釘型鋼混凝土梁試件和2根對比梁試件在純扭作用下的靜力荷載試驗(yàn)。試驗(yàn)主要考慮了焊接栓釘間距、直徑、長度和位置4個(gè)變化參數(shù)對試件抗扭性能的影響。通過試驗(yàn)觀察了試件扭轉(zhuǎn)破壞形態(tài)，揭示了試件的抗扭機(jī)理，獲取了扭矩-扭率曲線、扭矩-應(yīng)變曲線及相關(guān)特征點(diǎn)參數(shù)，分析各變化參數(shù)對其抗扭性能的影響，最后基于能量守恒定律，分析了純扭作用下試件的耗能性能和損傷演變規(guī)律。結(jié)果表明：焊接栓釘型鋼混凝土構(gòu)件具有較好的抗扭和耗能性能；在型鋼腹板焊接栓釘比在翼緣焊接栓釘對提高構(gòu)件的抗扭性能更有效；在型鋼的翼緣和腹板同時(shí)焊接栓釘，可以提高試件的耗能性能和抑制試件內(nèi)部損傷發(fā)展。
［關(guān)鍵詞］型鋼混凝土梁； 焊接栓釘； 抗扭性能； 損傷
中圖分類號：TU398文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)04-0110-08
Pure torsional experiment and damage analysis of welded stud steel reinforced concrete beams
Chen Yuliang1,2, Zhong Ming3， Chen Zongping1,4
(1 College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; 2 College of Civil Engineering and Architecture, Guangxi University of Science and Technology, Liuzhou 545006, China; 3 Nanning Audit Bureau, Nanning 530022, China; 4 Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning 530004, China)
Abstract:In order to study the torsional performance of welded stud steel reinforced concrete (SRC) beams, static load tests of seven welded stud SRC beam specimens and two contrastive beam specimens without stud under pure torsion were carried out . The impacts of displacement, diameters, length and location of welded studs on torsional behavior of specimens were considered in the test. The torsional failure patterns of the members were observed and the torsional resistance mechanism of the members was revealed. The torque-torsion ratio curves, torque-strain curves and related characteristic parameters were obtained, and then the impacts parameters of torsional mechanisms on the welded stud SRC specimens were anlalyzed. Finally, based on the law of conservation of energy, the energy dissipation performance and damage evolution law of specimens under pure torsion were analyzed. The results show that the steel reinforced concrete members with welded studs have good torsional resistance and energy dissipation performance; the welded studs in steel web is more effective than the welded studs in steel flange to improve the torsional resistance of specimens; the welded studs in both steel flange and web can improve the energy dissipation performance and restrain the development of internal damage of the specimens.
Keywords:steel reinforced concrete beam; welded stud; torsional behavior; damage
*國家自然科學(xué)基金項(xiàng)目（51268004，51578163），廣西科技廳科技開發(fā)項(xiàng)目（桂科攻1598007-5），高校中青年教師基礎(chǔ)能力提升項(xiàng)目（KY2016YB258）,廣西科技大學(xué)創(chuàng)新團(tuán)隊(duì)支持計(jì)劃資助，廣西研究生教育創(chuàng)新計(jì)劃資助項(xiàng)目(YCBZ2014007)，中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金資助（310829161011）。
通訊作者：陳宗平，博士，教授，博士生導(dǎo)師，Email:zpchen@gxu.edu.cn。
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