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针对预应力叠合板工程应用中两方面的问题进行了研究:一方面通过增设钢筋桁架增加叠合前预应力薄板的刚度和承载力以增加其适用跨度;另一方面通过钢筋桁架提高预应力薄板和后浇混凝土交接面的抗剪承载力,并利用空心成孔管减轻叠合板自重。首先通过理论分析提出了新型叠合板在叠合前的刚度和承载力计算公式,通过足尺模型试验验证了钢筋桁架提高预应力薄板刚度和承载力的效果,并初步验证了理论分析所得刚度和承载力公式的可靠性。
In the application of prestressed composite plywood engineering, two aspects are studied: on the one hand, increasing the rigidity and bearing capacity of the prestressing prestressing sheet by adding steel truss to increase its applicable span; on the other hand, by increasing the steel truss, the prestressing sheet And after pouring concrete shear resistance of the interface, and the use of hollow tube to reduce the self-weight plywood. Firstly, the formula of the stiffness and bearing capacity of the new type of laminated plate before lamination is put forward by theoretical analysis. The effect of the steel truss on the stiffness and the bearing capacity of the prestressed thin plate is verified by the full-scale model test. The rigidity and the bearing capacity of the prestressed thin plate are verified. Reliability of bearing capacity formula.