预埋抗剪销钉叠合板的抗弯承载性能研究
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摘要
为了研究设置抗剪销钉对钢筋混凝土叠合楼板承载性能的影响,设计了2组抗剪销钉植入数量不同的叠合板,1组不设销钉叠合板,1组整浇板,分别进行静力加载试验。通过得到的试验数据,对各组板的承载力、板在加载过程中的挠度变化以及钢筋、混凝土的应变变化进行了比较分析。同时结合有限元软件对设置不同数量和不同布置形式销钉的叠合板进行了数值模拟计算分析。研究结果表明:叠合面设置数量足够多的抗剪销钉能保证叠合板的抗弯承载力,而且合理布置抗剪销钉可以提高叠合板整体工作的效率。
In order to study the influence of embedded shearing pins on the flexural bearing capacity of reinforced concrete composite floor slabs, two groups of composite floor slabs with different numbers of shearing pins were designed. In one group, no shearing pin was adopted and the other group was integrated slabs. The two groups of slabs were then subjected to static loadings. From the obtained test data, a comparison analysis of the bearing capacity of each group of slabs, the deflection variations of slabs, and the strain variations in steel bars and concrete during the loading process was conducted. At the same time, the finite element analysis software for numerical simulation was applied to the numerical computations of composite slabs with different numbers and arrangements of shearing pins. The results showed that, when the number of shearing pins is sufficient, the flexural bearing capacity of composite floor slabs can be guaranteed. When shearing pins are arranged reasonably, the overall efficiency of composite floor slabs can be improved.
In order to study the influence of embedded shearing pins on the flexural bearing capacity of reinforced concrete composite floor slabs, two groups of composite floor slabs with different numbers of shearing pins were designed. In one group, no shearing pin was adopted and the other group was integrated slabs. The two groups of slabs were then subjected to static loadings. From the obtained test data, a comparison analysis of the bearing capacity of each group of slabs, the deflection variations of slabs, and the strain variations in steel bars and concrete during the loading process was conducted. At the same time, the finite element analysis software for numerical simulation was applied to the numerical computations of composite slabs with different numbers and arrangements of shearing pins. The results showed that, when the number of shearing pins is sufficient, the flexural bearing capacity of composite floor slabs can be guaranteed. When shearing pins are arranged reasonably, the overall efficiency of composite floor slabs can be improved.
引文
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[2] SCOTT N L. Performance of precast prestressed hollow core slab with composite concrete topping[J]. Paint and coatings industry journal,1973,18(2): 64-77.
[3] 刘立新,于春,栾文彬,等.预制混凝土叠合板的无筋叠合面抗剪性能试验研究[J].建筑施工,2012,35(1):80-82.
[4] 王振领,林拥军,钱永久.新老混凝土结合面抗剪性能试验研究[J].西南交通大学学报,2005,40(5):600-604.
[5] 洪炳钦,杨俊杰,杨遒,等.叠合梁斜截面抗剪性能的试验研究[J].浙江工业大学学报,2007,45(4):464-468.
[6] 张雷顺,闫国新,张晓晶,等.沟槽式新老混凝土粘结面抗剪强度试验研究[J].郑州大学学报(工学版),2006,27(2):24-28.
[7] 刘海宁.钢—预制带肋底板混凝土叠合板组合梁抗弯试验研究[D].济南:山东大学,2015.
[8] 陈东,沈小璞.带桁架钢筋的混凝土双向自支承叠合板受力机理研究[J].建筑结构,2015,45(15):93-96.
[9] 周玉成.新型钢筋桁架混凝土叠合板力学性能研究[D].郑州:郑州大学,2016.
[10] 高云.混凝土叠合板叠合面抗剪承载力研究[D].济南:山东大学,2016.
[11] 姚谦峰.土木工程结构试验[M].2版.北京:中国建筑工业出版社,2008.
[12] 卢成原,凌伟森,黄玲琳.考虑叠合效应的混凝土板抗弯承载性能研究[J].浙江工业大学学报,2016,44(4):439-445.
[13] 王湛,徐刚.叠合梁预制构件表面浇水处理后承载力的数值计算与实验比较分析[J].铁道建筑技术,2014(2):93-96.