小剪跨比钢板-混凝土组合板抗剪性能的试验研究
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摘要
通过2块小剪跨比钢板-混凝土组合板试件在集中力作用下抗剪性能试验,对组合板抗剪性能进行了初步分析。试验中主要变化了钢板厚度,得到组合板的极限承载力、变形、受剪破坏形态以及裂缝的发展情况。试验结果表明:小剪跨比钢板-混凝土组合板试件中混凝土最终破坏以斜压破坏为主;通过栓钉的连接,钢板和混凝土协同工作性能良好;截面应变分布基本符合平截面假定。钢板通过栓钉与混凝土的组合效应,显著提高了混凝土的抗剪能力,同时也改善了构件整体延性,该试验的组合板中钢板承担的剪力占总剪力的50%左右。
Experiments studying shear behavior were conducted on two simply-supported steel-concrete composite slab specimens with small shear-span ratios subjected to concentrated load to conduct preliminary analyses on the shearing performance of this kind of composite slab. The ultimate bearing capacity, deformation,shear failure mode, and crack development of the composite slabs are obtained through comparison of the specimens with different steel plate thicknesses. The experiment results show that diagonal-compression is the ultimate failure mode of steel-concrete composite slabs with small shear-span ratios. Steel plates can achieve composite action with the concrete through shear connectors, so accordingly the section strain distribution basically accords with the plane section assumption. The shearing capacity of the concrete slabs is increased significantly through the composite effect of steel plates, and furthermore the overall ductility is improved. In the tests, steel plates in steel plate-concrete composite slabs bear over 50% of the total shear.
Experiments studying shear behavior were conducted on two simply-supported steel-concrete composite slab specimens with small shear-span ratios subjected to concentrated load to conduct preliminary analyses on the shearing performance of this kind of composite slab. The ultimate bearing capacity, deformation,shear failure mode, and crack development of the composite slabs are obtained through comparison of the specimens with different steel plate thicknesses. The experiment results show that diagonal-compression is the ultimate failure mode of steel-concrete composite slabs with small shear-span ratios. Steel plates can achieve composite action with the concrete through shear connectors, so accordingly the section strain distribution basically accords with the plane section assumption. The shearing capacity of the concrete slabs is increased significantly through the composite effect of steel plates, and furthermore the overall ductility is improved. In the tests, steel plates in steel plate-concrete composite slabs bear over 50% of the total shear.
引文
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[2]聂建国,田春雨,周建军,等.钢-混凝土组合结构在某大型烟囱工程中的应用[J].建筑结构学报,2006,36(8):80―81.Nie Jianguo,Tian Chunyu,Zhou Jianjun,et al.Application of composite steel-concrete slab in a chimney construction[J].Journal of Building Structures,2006,36(8):80―81.(in Chinese)
[3]聂建国,朱林森,任明星,等.北京某地下人行通道的加固处理[J].建筑结构学报,2001,31(9):56―57.Nie Jianguo,Zhu Linsen,Ren Mingxing,et al.The reinforcement of underground passageway in Beijing City[J].Journal of Building Structures,2001,31(9):56―57.(in Chinese)
[4]樊建生,聂建国,赵洁,等.组合结构在桥梁加宽工程中的应用[J].哈尔滨工业大学学报,2007,39(2):652―654.Fan Jiansheng,Nie Jianguo,Zhao Jie,et al.Application of composite structures in bridge widening[J].Journal of HARBIN Institute of Technology,2007,39(2):652―654.(in Chinese)
[5]聂建国,赵洁.钢板-混凝土组合加固钢筋混凝土简支梁试验研究[J].土木工程学报,2008,29(5):50―56.Nie Jianguo,Zhao Jie.Experimental study on simply supported RC beams strengthened by steel plate-concrete composite technique[J].China Civil Engineering Journal,2008,29(5):50―56.(in Chinese)
[6]聂建国,吴丽丽,樊健生,等.槽形钢-混凝土组合梁及其应用前景初探[J].土木工程学报,2008,41(11):79―85.Wu Lili,Nie Jianguo,Fan Jiansheng,et al.Preliminary study of channel steel-concrete composite beam and application[J].China Civil Engineering Journal,2008,41(11):79―85.(in Chinese)
[7]吴丽丽,聂建国,吕坚锋,等.简支槽形钢-混凝土组合梁的试验研究[J].土木工程学报,2011,44(3):40―48.Wu Lili,Nie Jianguo,LüJianfeng,et al.Experimental study of simply supported channel steel-concrete composite beams[J].China Civil Engineering Journal,2011,44(3):40―48.(in Chinese)
[8]赵洁.钢板-混凝土组合抗弯加固的试验研究与理论分析[D].北京:清华大学,2008.Zhao Jie.Experimental study and theoretical analysis on simply supported steel plate-concrete composite beams[D].Beijing:Tsinghua University,2008.(in Chinese)
[9]吴丽丽,聂建国.四边简支钢-混凝土组合板的弹性局部剪切屈曲分析[J].工程力学,2010,27(1):52―57.Wu Lili,Nie Jianguo.Elastic local shear buckling analysis on simply supported steel-concrete composite slab[J].Engineering Mechanics,2010,27(1):52―57.(in Chinese)
[10]吴丽丽,聂建国.钢-混凝土组合板的弹性剪切屈曲分析[J].华南理工大学学报(自然科学版),2011,41(3):622―629.Wu Lili,Nie Jianguo.Analysis of key parameters of non-tension prestressing technology for continuous steel-concrete composite beams[J].Journal of South China University of Technology(Natural Science Edition),2011,41(3):622―629.(in Chinese)
[11]Liang Q Q,Uy B,Wright H D,et a1.Local and post-local buckling of double skin composite panels[C].Proceedings of the Instition of Civil Engineers:Structures and Buildings,UK,Thomas Telfotd Services Ltd,2003:111―119.
[12]Liang Q Q,Uy B,Wright H D,et a1.Local buckling of steel plates in double skin composite panels under biaxial compression and shear[J].Journal of Structural Engineering,2004,130(3):443―451.
[13]韩林海,宋天诣,谭清华.钢-混凝土组合结构抗火设计原理研究[J].工程力学,2011,28(增刊II):54―66.Han Linhai,Song Tianyi,Tan Qinghua.Fire resistance design of steel-concrete composite structures[J].Engineering Mechanics,2011,28(Suppl II):54―66.(in Chinese)
[14]聂建国,王宇航.钢-混凝土组合结构梁疲劳性能研究综述[J].工程力学,2012,29(6):1―11.Nie Jianguo,Wang Yuhang.Research status on fatigue behavior of steel-concrete composite beams[J].Engineering Mechanics,2012,29(6):1―11.(in Chinese)
[15]聂建国,胡红松.简支槽形梁考虑空间受力的理论解[J].工程力学,2012,29(12):64―71.Nie Jianguo,Hu Hongsong.Theoretical solution of simple supported trough girder considering spatial effect[J].Engineering Mechanics,2012,29(12):64―71.(in Chinese)
[16]Clarke J L,Morley C T.Steel-concrete composite plates with flexible shear connectors[C]//Institution of Civil Enginssrs,Proceedings.London UK:The Transportation Research Board,1972:557―568.
[17]Ollgaard J G,Slutter R G,Fisher J W.Shear strength of stud connections in light weight and normal weight concrete[J].Journal of American Institute of Steel Construction,1971,8(4):55―64.
[18]GB50010-2010,混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.GB50010-2010,Concrete structure design code[S].Beijing:China Building Industry Press,2010.(in Chinese)
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