箱形型鋼混凝土梁純扭性能試驗
丁海軍1，梁書亭1，朱筱俊2，張根俞3
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箱形型鋼混凝土梁純扭性能試驗丁海軍1，梁書亭1，朱筱俊2，張根俞3（1 東南大學(xué)土木工程學(xué)院，南京 210096； 2 東南大學(xué)建筑設(shè)計研究院，南京 210096；3 中國建筑設(shè)計研究院，北京 100044）［摘要］介紹了7根箱形型鋼混凝土梁和1根鋼筋混凝土梁的純扭試驗，并對試驗現(xiàn)象進行了描述。在此基礎(chǔ)上根據(jù)混凝土、鋼筋和型鋼不同位置處的應(yīng)變情況，詳細分析了箱形型鋼混凝土梁受扭過程中的力學(xué)性能；同時分析了不同型鋼截面、不同配筋情況和箱形型鋼內(nèi)是否澆注混凝土等對型鋼混凝土梁純扭性能的影響。結(jié)果表明，加載過程中型鋼與混凝土能協(xié)同工作；箱形型鋼抗扭剛度和配箍率對箱形型鋼混凝土梁的抗扭承載力有顯著影響。［關(guān)鍵詞］箱形型鋼混凝土；純扭；試驗研究；力學(xué)性能中圖分類號：TU398文獻標(biāo)識碼：A文章編號：1002-848X(2011)01-0019-04Experimental research on pure torsional behavior of box-shaped steel reinforced concrete beamsDing Haijun1, Liang Shuting1, Zhu Xiaojun2, Zhang Genyu3(1 College of Civil Engineering, Southeast University, Nanjing 210096, China; 2 Architectural Design & Research Institute,Southeast University, Nanjing 210096, China; 3 China Architectural Design & Research Group, Beijing 100044, China)Abstract:Pure torsion tests for 7 box-shaped steel reinforced concrete(BSRC) beams and 1 reinforced concrete beams were introduced, and the test phenomenon was described. The mechanical behavior of beams during the whole loading process was analyzed based on the strain obtained from the strain gauges attached to different positions of concrete, reinforcement bars and steels. At the same time, influence of different section of box-shaped steel, different reinforcement arrangement and whether cast concrete inside box-shaped steel on pure torsional behavior of BSRC beams was analyzed. Test results show that steel and concrete of BSRC beams can work together during the process of loading, and torsional rigidity of the box-shaped steel and stirrup ratio affect the torsional capacity of BSRC beams significantly.Keywords:box-shaped steel reinforced concrete; pure torsion; experimental research; mechanical behavior*國家自然科學(xué)基金預(yù)研項目（KJ2009253）。作者簡介：丁海軍，碩士，Email:pdhj2005@163.com。參考文獻［1］白國良,秦福華.型鋼鋼筋混凝土原理與設(shè)計［M］.上海:上?？茖W(xué)技術(shù)出版社,2000.［2］HSU H L, WANG C L. Flexural-torsional behavior of steel reinforced concrete members subjected to repeated loading［J］. Earthquake Engineering and Structural Dynamics，2000,29（5）:667-682.［3］胡少偉,聶建國.箱形鋼-混凝土組合梁的復(fù)合彎扭試驗研究［J］.建筑結(jié)構(gòu),2006，36（8）：53-59.［4］胡少偉.組合梁抗扭分析與設(shè)計［M］.北京:人民交通出版社,2004.［5］包世華,周堅.薄壁桿件結(jié)構(gòu)力學(xué)［M］.北京:中國建筑工業(yè)出版社,2006.
