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混凝土夹芯板(CS板)抗剪性能的试验研究及板式结构体系分析
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摘要
近年来,环保越来越为人们所关注及实心粘土砖的逐步限时退出建筑市场,发展轻质高强、节能抗震、利用“三废”、保护环境、节约土地、降低成本、并具有一定建筑生产工业化的建筑结构新体系已势在必行。
    CS板式结构住宅体系是适应我国墙体改革及住房产业化要求的产物。其良好的经济效益和广阔的应用前景得到了越来越多建设工作者的关注。但CS板式结构体系作为一种新型的房屋结构体系,还有很多力学性能不为我们所熟悉,我们对CS板式结构的试验研究还不够全面。
    本文通过对六块混凝土夹芯板(CS楼板)进行抗剪性能的试验研究,在六块试验板中,有三块试验板的斜插丝直径为2.2mm,另三块为3.0mm。我们分析了CS楼板承受剪力的性能特点及其剪力传递机理,得到了不同斜插丝直径的试验板不同的破坏模式、试验板的荷载—挠度曲线、各测点的荷载—应变曲线等。同时,本文还对CS楼板进行了非线性有限元分析,并与试验值相比较,有限元计算结果与试验值吻合较好。最后,在试验研究及理论分析的基础上,总结归纳出CS楼板斜截面极限承载力的理论计算公式。另外,本文还利用有限元方法对CS板式结构体系进行了整体分析,建立了CS板式结构体系的静力计算方案。
In recent years, the people pay more and more attention to the environmental protection and the common clay brick will be abandoned in the construction system. So it is urgent for us to develop one new house building system, which has more advantages than the old masonry structure building. And the advantage includes lightweight, environmental protection, thermal conservation, earthquake resistance, economic benefit, economization on land, and product industrialization.
    CS slab structural building system adapts to the requirement of the reformation of the dwelling house. It has good economic benefit and wide perspective of the application, so it has caused mush attention of a large of civil engineers. But at the other hand, there are still lots of mechanical properties of CS slab structural building system, which have not been mastered by us yet.
    This paper, by shear behavior experiment of six blocks of concrete sandwich slabs(CS floor slab) under the load, studied the shear characteristic and the shear transmission of the concrete sandwich slabs. There are three blocks of slabs whose steel truss connectors’ diameter is 2.2mm, and the other slabs whose steel truss connectors’ diameter is 3.0mm among the all concrete sandwich slabs. At the same time, we gained the interaction curve between load and deflection, and the interaction curve between load and strain of the concrete sandwich slabs.
    Besides, by using the nonlinear finite-element method, we made a effective analysis on the shearing capacity of the concrete sandwich slab. We made comparison between the computed results and the experimental results, and they are in good agreement.
    Based on the experiment and the theoretic analysis, we concluded the formula of calculating the shearing failure load of the concrete sandwich slab. At the last, we also set up the static calculation schemes of CS slab structural building system by using finite-element method.
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