【作者】 刘运林；

【导师】 徐勤；

【作者基本信息】 合肥工业大学 ， 结构工程， 2007， 硕士

【摘要】 现浇混凝土空心楼盖是在绑扎楼板钢筋的同时，在楼板区格中间部位、上下层受力钢筋之间，按一定规则放置柱状或者块状等空心、轻质、廉价的一次性填充构件，并将其定位，经现场浇筑混凝土，从而在浇筑好的混凝土楼盖中形成空腔，达到减少混凝土用量，降低楼盖自重的一种楼盖型式，本文介绍了常规的设计方法，并根据有限元比较分析，提出了常规设计方法中的一些注意事项和不足之处。正是由于常规设计方法的不足，本课题随后研究的主要内容是现浇混凝土空心楼盖结构的设计优化。以现浇混凝土空心无梁楼盖结构设计理论、有限元法为理论基础，结合工程实例对不同芯筒布置方向和钢筋布置方式进行具体设计和研究，得出最优的布管方向和钢筋布置方式，从而解决目前现浇混凝土空心无梁楼盖结构设计单一的问题，有利于现浇混凝土空心无梁楼盖结构在工程中的应用。为了能更进一步地对现浇混凝土空心楼盖进行研究，本文根据文献中的实验数据运用大型通用有限元软件Marc对试件进行了有限元数值模拟分析。文中对混凝土空心楼板的有限元数值模拟中涉及到的单元模型、材料模型、加载方式、求解方法及其中的关键参数的选取做了详细的阐述。利用Marc提供的设定方式或用户子程序实现了选取的模型和参数的输入。最后将计算结果与试验结果做了对比，验证了有限元数值模拟的有效性及参数选取的合理性。本文的研究成果，可为现浇混凝土空心楼盖结构设计优化的进一步研究提供参考。更多还原

【Abstract】 Cast-in-situ RC hollow floor system is a new kind of floor structure that has some Cavities in the middle of the up and down rebar made by filling component. It has the advantage of lightness, large span, and good seismic behavior. It has been increasingly applied in engineering practice recently and has a promising market future. This paper introduces the regular design method, and compares with the finite element analysis, then put up with some deficiency and some points of attention for usual design.In order to overcome the shortage in usual design, this paper places an important on the design optimization of the cast-in-site reinforced concrete hollow floor system. On the basis of the basic theories of cast-in-site RC floor system and the finite element method, this paper draws an optimal layout direction of the hollow pipe and optimal way to arrange the rebar through a practical example, which will be propitious to be applied in the structure design.For the purpose of studying the cast-in-site RC hollow floor system further, this paper makes a simulation analysis of the testing piece from a reference documents. In this process, this paper attends to carry On detailed exposition to the element model, material constitutive model, loading mode, solving method, and selection of some key parameters. The input work is completed by use of the procedures and the user subroutines provided by MSC.Marc. Then the results of analysis and the results in the reference document are compared, so the validity of the finite element analysis and the rationality of the parameter used in the analysis are proved.The achievement of this paper can be referred for further studying on design optimization of the measure of the cast-in-site RC hollow floor system.更多还原