高效预应力叠合板的试验研究

摘要

This research aims at two problems in application of prestressed composite slab.One is to add steel bar trusses to increase stiffness and bearing capacity of prestress thin slab,and to increase the suitable span.The other is to use steel bar truss to increase shear strength of the interface between prestressed thin slab and after pouring concrete,and by using hollow pipe to reduce the weight of the composite slab.First-ly,the stiffness and bearing capacity calculation formulas of the new composite slab before composition are be derived from the theoretic analysis.Then,based on the full-scale model test,the effects of steel bar truss are proved to increasing stiffness and bearing capacity,and the reliability of the formulas are verified.%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。