To solve the problems of laminated slabs,we developed a new type of prefabricated ribbed steel truss laminated slabs.The three point static loading tests of the three precast ribbed reinforced concrete truss two-way slabs and a precast reinforced truss composite slab are carried out,and the four specimens are simulated at the construction stage and the service stage by using the finite element software,we studied the load laminated bearing characteristics,crack laws and destroy form of this new type laminated slab at the service load stage and simulation analysis of the precast floor mechanical behavior at the construction stage.The finite element simulation results are in good agreement with the experimental results,this kind of slab shape laminated slab has good crack resistance,shear strength,stiffness and bearing capacity,which can meet the requirements of specification.The deflection of precast slab at the construction stage is mainly affected by slab shape,and this slab shape could solve the problem that the precast slab has a large deflection at the construction stage.The ribbed steel truss composite slab has the advantages of good integrity of the cast-in-place slab and the fast construction speed of the prefabricated composite slab,which achieves the purpose of saving the steel bar and reducing the thickness of the slab.%目的 针对现有叠合板的不足,研制出了一种新型预制带肋钢筋桁架叠合板.方法 通过对3块预制带肋钢筋桁架叠合板和1块预制钢筋桁架叠合板进行三分点静力加载试验,并利用有限元软件对4个试件的施工阶段、使用阶段进行模拟计算,研究在使用阶段荷载下该新型叠合板的受力特征、裂缝开展规律、破坏形态和在施工阶段预制底板的受力性能.结果 有限元模拟结果与试验结果基本吻合,该种板型叠合板具有良好的抗裂、抗剪性能,刚度和承载力也满足规范要求.结论 施工阶段预制底板的版型对挠度的影响较大,该种板型可以解决预制底板在施工阶段挠度过大的问题.带肋钢筋桁架叠合板兼具现浇板整体性好和预制装配式叠合板施工速度快的优点,可以达到节约钢筋、降低板厚的目的.
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