桁架式钢骨混凝土梁斜截面承载力试验  

Investigations on the shear capacity of steel truss S. R. C beam

作　　者：邓志恒[1] 陈贺功[1,2] 林绍明[1] 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]上海市建筑科学研究院(集团)有限公司,上海200032

出　　处：《广西大学学报（自然科学版）》2010年第1期12-16,共5页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(50868001)

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 concrete. 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.

关 键 词：桁架式钢骨混凝土 剪跨比 钢骨腹板含钢率 抗剪承载力 

分 类 号：TU398.9[建筑科学—结构工程]