黏结型钢加固梁设计方法及软件开发
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摘要
根据黏结型钢加固梁的截面应变,建立截面力平衡和弯矩平衡方程,研究黏结型钢加固梁的中和轴位于原梁截面和型钢截面时对加固梁承载力的影响.结果表明:当中和轴不在混凝土梁截面内时,黏结型钢组合截面积会增加,加固梁中钢筋和混凝土的力学性能未能充分发挥,加固后梁的承载力提高不显著.在此基础上,给出了加固梁中和轴最适宜的变化范围以及黏结型钢加固梁的截面选型和校核方法.利用Visual C++开发出适合于工程应用设计计算软件,该软件操作简单易操作,交互界面人性化,能显著提高加固设计的速度.
According to the strain on the cross-section of conc re te beam strengthened by steel,the force and bending moment balance equations we re established to study the effect of neutral axis located in original beam on b earing capacity of beams reinforced by steel.The results show that when neutral axis is not in the original beam,the areas of steel in reinforcement will incr ease,the mechanical properties of steel and concrete can not exert sufficiently,and the carrying capacity improvement is not significant.Based on the results,the suitable range of neutral axis and the cross-section selection and calibr ation methods were presented.Application software was developed with Visual C++ to calculate capacity of beams.The software is simple and easy to operate thro ugh a more users-friendly interface,which can improve the speed of reinforceme nt design.
According to the strain on the cross-section of conc re te beam strengthened by steel,the force and bending moment balance equations we re established to study the effect of neutral axis located in original beam on b earing capacity of beams reinforced by steel.The results show that when neutral axis is not in the original beam,the areas of steel in reinforcement will incr ease,the mechanical properties of steel and concrete can not exert sufficiently,and the carrying capacity improvement is not significant.Based on the results,the suitable range of neutral axis and the cross-section selection and calibr ation methods were presented.Application software was developed with Visual C++ to calculate capacity of beams.The software is simple and easy to operate thro ugh a more users-friendly interface,which can improve the speed of reinforceme nt design.
引文
[1]Mario S,Gerard V E,Amar K.Design and analysisof a composite beam for infrastructure applications,part I:preliminary investigation in bending[J].Inter-national Journal of Materials and Product Technolo-gy,2006,25(4):297-312.
[2]Mario S,Gerard V E,Amar K.Design and analysisof a composite beam for infrastructure applications,partⅡ:preliminary investigation in shear and torsion[J].International Journal of Materials and ProductTechnology,2006,25(4):313-330.
[3]Mario S,Amar K,Gerard V E.Design and analysisof a composite beam for infrastructure applications,partⅢ:experimental results and non-linear FE anal-ysis[J].International Journal of Materials and Prod-uct Technology,2006,25(4):331-346.
[4]聂建国,王洪全.钢-混凝土组合梁纵向抗剪的试验研究[J].建筑结构学报,1997,18(2):13-19.
[5]Nie Jianguo,Cai Chun S.Deflection of cracked RCbeams under sustained loading[J].Journal of Struc-tural Engineering,ASCE,2000,126(6):708-716.
[6]聂建国,王宇航.钢-混凝土组合梁在疲劳荷载作用下的变形计算[J].清华大学学报:自然科学版,2009,49(12):1915-1924.
[7]聂建国,唐亮,魏茂林.钢-混凝土组合梁扭转的组合作用分析[J].工业建筑,2009,38(3):1-4.
[8]王挺,聂建国.钢-压型钢板混凝土组合梁极限抗弯承载力的研究[J].建筑结构学报,2001,22(2):31-36.
[9]樊健生,聂建国,王浩.考虑收缩、徐变及开裂影响的组合梁长期受力性能研究(Ⅰ):试验及计算[J].土木工程学报,2009,42(3):8-15.
[10]聂建国,黄远.钢-混凝土组合梁非线性地震反应分析模型[J].清华大学学报:自然科学版,2009,49(3):329-332.
[11]陆洲导,王李果,李明.型钢-混凝土组合梁在改造加固中的理论研究[J].结构工程师,2000,(2):32-36.
[12]陆洲导,王李果,那杰.型钢-混凝土组合梁在改造加固中的试验研究[J].工业建筑,2000,30(2):1-3,7.
[13]Liang Q Q,Uy B,Bradford M A,et al.Ultimatestrength of continuous composite beams in combinedbending and shear[J].Const steel Res,2004,60:1109-1128.
[14]Zhao Guozhong,Li A.Numerical study of a bondedsteel and concrete composite beam[J].Computersand Structures,2008,86:1830-1838.
[15]四川省建筑科学研究院.GB50367—2006混凝土结构加固设计规范[S].北京:中国建筑工业出版社,2006.
[16]胡少波.型钢加固钢筋混凝土梁的一次和二次受力构件的试验研究[D].湖北:武汉大学土木建筑工程学院,2005.
[17]顾本.工字型钢外粘锚加固钢筋混凝土梁的研究[D].湖南:湖南大学土木工程学院,2006.
[18]方超.型钢加固混凝土组合梁抗弯承载力的试验研究和理论分析[D].天津:天津大学建筑工程学院,2007.
[2]Mario S,Gerard V E,Amar K.Design and analysisof a composite beam for infrastructure applications,partⅡ:preliminary investigation in shear and torsion[J].International Journal of Materials and ProductTechnology,2006,25(4):313-330.
[3]Mario S,Amar K,Gerard V E.Design and analysisof a composite beam for infrastructure applications,partⅢ:experimental results and non-linear FE anal-ysis[J].International Journal of Materials and Prod-uct Technology,2006,25(4):331-346.
[4]聂建国,王洪全.钢-混凝土组合梁纵向抗剪的试验研究[J].建筑结构学报,1997,18(2):13-19.
[5]Nie Jianguo,Cai Chun S.Deflection of cracked RCbeams under sustained loading[J].Journal of Struc-tural Engineering,ASCE,2000,126(6):708-716.
[6]聂建国,王宇航.钢-混凝土组合梁在疲劳荷载作用下的变形计算[J].清华大学学报:自然科学版,2009,49(12):1915-1924.
[7]聂建国,唐亮,魏茂林.钢-混凝土组合梁扭转的组合作用分析[J].工业建筑,2009,38(3):1-4.
[8]王挺,聂建国.钢-压型钢板混凝土组合梁极限抗弯承载力的研究[J].建筑结构学报,2001,22(2):31-36.
[9]樊健生,聂建国,王浩.考虑收缩、徐变及开裂影响的组合梁长期受力性能研究(Ⅰ):试验及计算[J].土木工程学报,2009,42(3):8-15.
[10]聂建国,黄远.钢-混凝土组合梁非线性地震反应分析模型[J].清华大学学报:自然科学版,2009,49(3):329-332.
[11]陆洲导,王李果,李明.型钢-混凝土组合梁在改造加固中的理论研究[J].结构工程师,2000,(2):32-36.
[12]陆洲导,王李果,那杰.型钢-混凝土组合梁在改造加固中的试验研究[J].工业建筑,2000,30(2):1-3,7.
[13]Liang Q Q,Uy B,Bradford M A,et al.Ultimatestrength of continuous composite beams in combinedbending and shear[J].Const steel Res,2004,60:1109-1128.
[14]Zhao Guozhong,Li A.Numerical study of a bondedsteel and concrete composite beam[J].Computersand Structures,2008,86:1830-1838.
[15]四川省建筑科学研究院.GB50367—2006混凝土结构加固设计规范[S].北京:中国建筑工业出版社,2006.
[16]胡少波.型钢加固钢筋混凝土梁的一次和二次受力构件的试验研究[D].湖北:武汉大学土木建筑工程学院,2005.
[17]顾本.工字型钢外粘锚加固钢筋混凝土梁的研究[D].湖南:湖南大学土木工程学院,2006.
[18]方超.型钢加固混凝土组合梁抗弯承载力的试验研究和理论分析[D].天津:天津大学建筑工程学院,2007.
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