【作者】 陈静茹；

【导师】 彭少民；

【作者基本信息】 武汉理工大学 ， 结构工程， 2002， 硕士

【摘要】 现浇钢筋混凝土空心板无梁楼盖是一种新型的无梁楼盖体系，它自重轻，跨度大，是继带柱帽的无梁楼盖、平板无梁楼盖、密肋无梁楼盖之后，顺应了时代对无梁楼盖体系要求的新型无梁楼盖体系，目前已经在一些工程项目上投入使用，取得了良好的经济效益和社会效益。 和普通平板无梁楼盖相比，现浇钢筋混凝土空心板无梁楼盖有两个突出的不同点，一是在楼板内预埋空心圆筒形成空心楼板，二是在框架柱之间设有暗扁梁。本文以现浇钢筋混凝土空心板无梁楼盖的特点为基础，分析它的基本力学性能，探索合理的计算模式和设计方法，对正确进行设计、保障结构的安全使用、进一步推广它的应用，有非常重要的意义。 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。其次对空心板进行了从加荷、开裂、屈服直至破坏的全过程材料非线性有限元计算，得到了空心板在竖向荷载作用下的开裂荷载、极限荷载及位移和应力分布规律；还对单跨无梁楼盖进行了材料非线性有限元计算，通过分析主应力场明确了柱上暗扁梁的作用；有限元计算的结果验证了以上的理论分析并得到了一些重要的结论，对改进现浇空心板无梁楼盖的构造措施有重要的参考价值。通过理论分析和有限元计算，本文认为现浇钢筋混凝土空心板无梁楼盖应按无梁楼盖体系的设计方法进行结构计算。进而将无梁楼盖体系的计算方法应用于现浇空心板无梁楼盖中，通过对板格弯矩的分析，得出了现浇空心板无梁楼盖按等效框架法计算的板带弯矩分配比例系数，按经验系数法计算的板带弯矩设计值。以上理论结果对实际工程有实践意义和应用价值，可以作为工程界的参考。更多还原

【Abstract】 The cast-in-place reinforced concrete hollow flat-plate floor is a new style of flat-plate floor. The weight of this floor is small and the span of this floor is large. Compared with the flat-slab floor, the flat-plate floor and the waffle floor, the cast-in-place reinforced concrete hollow flat-plate floor adapts the demands for the flat-plate floor system of this age. It has been used in some projects and has gained great social effects and economical profits.Compared with the normal flat-plate floor, the cast-in-place reinforced concrete hollow flat-plate floor has two special characteristics. To produce the hollow floor, the hollow columns are pre-buried in the floor. There are concealed wide-flat beams between the frame columns. On the basis of the characteristics of this new style of flat-plate floor, analyzing its basic mechanical behavior, researching on its sound calculating model and calculating method are of great importance to proceed the designing, ensure the safety of structure, spread the application of this new style of flat-plate floor.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. A Material nonlinear finite element analysis for the cast-in-place reinforced concrete hollow slab that occurs from initial loading, cracking, yielding to failing is carried on. The cracking load, ultimate load, the displacement rules and the principal stress distribution rules of the hollow slab under the vertical loads are obtained. A Material nonlinear finite element analysis for the single span hollow flat-plate floor is also carried on. The function of the concealed wide-flat beams is definite by analyzing the principal stress distribution diagram. The calculating results verify the theoretical analysis and give some important conclusions which are great useful to improve the constructing of the new flat-plate floor. On the basis of the theoretical analysis and the finite element calculating, the conclusions show that the cast-in-place reinforced concrete hollow flat-plate floor should adopt the calculating method of the flat-plate floor. By using the calculating method of the flat-plate floor, the bend moments of the slab in different place are calculated. The moment distribution ratio between the column trip and the middle trip of the cast-in-place reinforced concrete hollow flat-plate floor calculated by the equivalent framemethod is demonstrated. The moment of the cast-in-place reinforced concrete hollow flat-plate floor calculated by the experience coefficient method is also demonstrated. Through the studies the practical conclusions have been obtained, which can be referred by engineers.更多还原