预应力混凝土叠合板受力性能分析

发布时间：2018-03-23 04:33

本文选题：预应力混凝土　切入点：叠合板　出处：《世界地震工程》2015年04期 　论文类型：期刊论文

【摘要】：预应力混凝土叠合板具有板薄、用钢量小、施工简便及质量可靠等特点,在工程中得到了广泛应用。但由于采用二次浇筑工艺,其受力性能与整体浇筑预应力混凝土板有所区别。工程中一般通过对叠合面的适当处理,以确保其受力整体性。结合某具体工程,应用有限元分析手段,对预应力混凝土叠合板和整体浇筑板进行对比分析。分析结果表明:预制预应力底板施工过程中最大挠度仅为其跨度的1/1752,几乎可以忽略;预应力叠合板正常使用阶段的受力性能和破坏形态均与整体浇筑板一致;极限荷载阶段,叠合面几乎无相对变形,最大剪应力0.373MPa,也在规范限值以内。因此,从变形、承载力等方面均证明了预应力混凝土叠合板叠合面施工构造处理的安全性。
[Abstract]:Prestressed concrete composite slab has been widely used in engineering because of its thin slab, small amount of steel, easy construction and reliable quality. The mechanical behavior of the composite concrete slab is different from that of the whole pouring prestressed concrete slab. In general, the finite element analysis method is used to ensure the stress integrity of the composite plane through the proper treatment of the superimposed surface in the engineering, and the finite element analysis method is applied to a concrete project. The results show that the maximum deflection of prefabricated prestressed slab is only 1 / 1752 of its span, which can be neglected. The mechanical behavior and failure pattern of prestressed laminated slab in normal service are consistent with that of the whole cast slab. In the ultimate load stage, there is almost no relative deformation on the composite plane, and the maximum shear stress of 0.373MPa is also within the limit value of the code. Bearing capacity and other aspects have proved the safety of construction structure treatment of prestressed concrete composite slab.
【作者单位】：南京工业大学土木工程学院;东南大学土木工程学院;
【基金】：国家科技支撑计划(2011BAJ10B03)
【分类号】：TU378

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