Abstract : the relations between prestressed reinforcements in two directions and the total balance loading of unbonded prestressed dual concrete slabs are established in the present paper based on the analysis of projects , in which the structural cost is optimized satisfying the requirements of the service state , the ultimate state and constructions 文摘:本文在对无粘结预应力双向板两个方向平衡荷载分配方案分析的基础上，建立了以两个方向预应力筋面积与总平衡荷载的关系式，在满足极限状态、正常使用极限状态和构造要求的条件下，使结构的造价达到最佳。
Nonlinear constitutive relations are discussed for analyzing the stress distribution , the appearance and development of the cracks , as well as the behavior of the boundary conditions of the two way slabs respectively . in the light of the experimental research on r . c . two way slabs under static loading , the behavior of yield line , the load deformation curves and the crack yield , plastic limit loads of slabs with different supporting conditions are studied 根据反映双向板混凝土材料非匀质性的本构关系，分析了双向板在荷载作用下的变形、屈服、裂缝和破坏的形态特性，并对钢筋混凝土双向板在不同支承条件下的塑性极限荷载、正常使用挠度(曲线)和截面设计作了进一步研究。
The relations between prestressed reinforcements in two directions and the total balance loading of unbonded prestressed dual concrete slabs are established in the present paper based on the analysis of projects , in which the structural cost is optimized satisfying the requirements of the service state , the ultimate state and constructions 本文在对无粘结预应力双向板两个方向平衡荷载分配方案分析的基础上，建立了以两个方向预应力筋面积与总平衡荷载的关系式，在满足极限状态、正常使用极限状态和构造要求的条件下，使结构的造价达到最佳。
The two ways stiffness ratio of the reinforced concrete hollow slab is studied and the results show the reinforced concrete hollow slab is bent in two ways under the vertical loads providing the length of the two rims of the slab are near . the analysis for the concealed wide - flat beams demonstrates that it belongs to the column strip and it does not possess the function of the frame girder 本文首先从理论上分析了空心板两方向刚度比，认为两边长接近的空心板在竖向荷载作用下为双向受弯，其受力性能为双向板；分析了柱上暗扁梁在楼盖中的作用，认为它不能起到框架梁的作用，应为柱上板带的一部分。
