箱形型鋼混凝土梁復合受扭性能試驗
張根俞1，梁書亭2，朱筱俊2，邢凈凈2
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箱形型鋼混凝土梁復合受扭性能試驗張根俞1，梁書亭2，朱筱俊2，邢凈凈2（1 中國建筑設計研究院，北京 100044； 2 東南大學土木工程學院，南京 210096）［摘要］通過5根箱形型鋼混凝土梁的復合受扭性能試驗，詳細描述了試件在不同扭彎比作用下的加載過程。試驗表明，箱形型鋼混凝土梁在復合受力情況下，出現(xiàn)扭轉型或彎曲型兩種破壞形態(tài)；扭彎比是影響彎、扭破壞形態(tài)的重要因素；適當?shù)膹澗卮嬖谀茱@著提高型鋼混凝土梁的抗扭強度。通過對試驗數(shù)據(jù)分析得到的箱形型鋼混凝土梁的彎扭相關方程，可為其設計提供參考和依據(jù)。［關鍵詞］型鋼混凝土；扭彎比；扭轉型破壞；彎曲型破壞；彎扭相關方程中圖分類號：TU398文獻標識碼：A文章編號：1002-848X(2011)01-0014-05Experimental research on combined torsional behavior of box-shaped steel reinforced concrete beamsZhang Genyu1, Liang Shuting2, Zhu Xiaojun2, Xing Jingjing2（1 China Architectural Design & Research Group, Beijing 100044, China;2 College of Civil Engineering,Southeast University, Nanjing 210096, China）Abstract:After experimental research on five box-shaped steel reinforced concrete(BSRC) beams under combined bending and torsion, the loading processes of the test members under different torsion-bending moment ratios were described in detail. Test and analysis results indicate that two failure modes (torsional failure mode and bending failure mode) may happen when BSRC beams are subjected to combined bending and torsion, the torsion-bending moment ratio is the key factor that decides the failure mode, and the ultimate torsion moment can be increased significantly by the existence of an appropriate bending moment. A bending-torsion correlation equation in three-phase expression form of the BSRC beams was put forward, which could serve as a valuable reference and basis for designing of BSRC beams.Keywords:steel reinforced concrete; torsion-bending moment ratio; torsional failure mode; bending failure mode; bending-torsion correlation equation*東南大學國家自然科學基金預研項目（KJ2009253）。作者簡介：張根俞，博士，Email：genyuzhang@gmail.com。參考文獻［1］趙鴻鐵.組合結構設計原理［M］.北京:高等教育出版社，2005.［2］YANG CHUN, CAI JIAN. Experimental study on box shape steel reinforced concrete beam［J］. Journal of Southeast University(English Edition)， 2005, 21(4)：463-468.［3］JGJ138—2001 型鋼混凝土組合結構技術規(guī)程［S］.北京:中國建筑工業(yè)出版社，2002.［4］YB9082—2006 鋼骨混凝土結構設計規(guī)程［S］.北京:冶金工業(yè)出版社，2007.［5］胡少偉,聶建國,羅玲.鋼－混凝土組合梁抗扭特性研究［J］.建筑結構,1999,29(4):38-40.［6］倪勇.新型外包鋼－混凝土組合梁受扭性能試驗研究［D］.南京:東南大學,2007.［7］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.［8］張根俞.型鋼混凝土梁受扭性能的試驗研究及理論分析［D］.南京:東南大學,2009.［9］GB/T50081—2002 普通混凝土力學性能試驗方法標準［S］.北京: 中國建筑工業(yè)出版社，2002.［10］GB/T228—2002 金屬材料室溫拉伸試驗方法［S］.北京:中國標準出版社，2002.
