桁架式钢骨混凝土梁斜截面承载力试验
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摘要
对4根桁架式钢骨混凝土简支梁的静力进行了试验,研究剪跨比和钢骨腹板含钢率对桁架式钢骨混凝土梁的斜截面抗剪承载力的影响以及斜截面的破坏形态。试验结果表明:随着剪跨比的升高,桁架式钢骨混凝土梁的斜截面抗剪承载力逐渐降低,而且其破坏形态由斜压破坏向剪切粘结破坏发展;随着腹板含钢率的提高,桁架式钢骨混凝土梁斜截面抗剪承载力明显得到提升。最后,推导了桁架式钢骨混凝土梁斜截面抗剪承载力公式,计算结果与试验结果符合良好。
The steel truss reinforced concrete is a pattern of the lattice type steel reinforced con-crete. Static experiments on 4 simply-supported steel truss reinforced concrete beams were carried out and the impact of ratio of shear and steel ratio of steel web to the shear resistance,as well as the failure mode of the oblique section,of the beams were studied. Based on the experimental results,the following conclusions can be drawn: the shear capacity of the steel truss reinforced concrete beam is reduced along with the increase of the shear span-to-depth ratio,and the failure mode is varied from baroclinic damage to shear-bond damage; the shear capacity is boosted along with the enhancement of the steel ratio. The formula of shear capacity is obtained and verified by the test results.
The steel truss reinforced concrete is a pattern of the lattice type steel reinforced con-crete. Static experiments on 4 simply-supported steel truss reinforced concrete beams were carried out and the impact of ratio of shear and steel ratio of steel web to the shear resistance,as well as the failure mode of the oblique section,of the beams were studied. Based on the experimental results,the following conclusions can be drawn: the shear capacity of the steel truss reinforced concrete beam is reduced along with the increase of the shear span-to-depth ratio,and the failure mode is varied from baroclinic damage to shear-bond damage; the shear capacity is boosted along with the enhancement of the steel ratio. The formula of shear capacity is obtained and verified by the test results.
引文
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[9]彭春华,宋文博,张伟军.型钢混凝土结构研究综述[J].陕西建筑学报,2007,142(4):1-3.
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[2]张建文,曹双寅.钢骨轻骨料混凝土梁斜截面抗剪承载力的计算与分析[J].特种结构,2007,24(2):15-19.
[3]叶列平,方鄂华.钢骨混凝土构件的受力性能研究综述[J].土木工程学报,2000,33(5):1-12.
[4]刘凡,翁晓红,邵永健.型钢轻骨料混凝土梁剪切性能的试验研究[J].工业建筑,2009,39(3):56-59.
[5]管品武,徐泽晶,王博.钢筋混凝土构件抗剪承载力分析方法比较[J].世界地震工程,2002,18(3):56-61.
[6]YEN J Y R,LIN Y C,LAI M T.Composite beams subjected to static and fatigue loads[J].Struct.Engrg,1997,123:41-46.
[7]沈银良.型钢混凝土梁受力性能试验研究[D].南京:南京理工大学,2005.
[8]张建文,曹双寅.钢骨轻骨料混凝土梁斜截面抗剪承载力的计算与分析[J].特种结构,2007,24(2):31-36.
[9]彭春华,宋文博,张伟军.型钢混凝土结构研究综述[J].陕西建筑学报,2007,142(4):1-3.
[10]王连广,李立新,张海霞.型钢混凝土梁抗剪强度计算公式[J].工程力学,2000,1(增刊):764-767.
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