混凝土密肋梁装配整体式空心楼盖的试验研究与分析

发布时间：2018-01-04 21:32

本文关键词：混凝土密肋梁装配整体式空心楼盖的试验研究与分析　出处：《山东建筑大学》2017年硕士论文　论文类型：学位论文

【摘要】：论文所研究的混凝土密肋梁装配整体式空心楼盖是由预制混凝土底板、现浇混凝土肋梁和现浇顶板组合而成,具有连续箱型截面的结构性能。预制混凝土底板与现浇混凝土肋梁和顶板共同抵抗外部荷载,它有整体性能好、预制混凝土底板易于制作、材料用量少、造价低和有利于保护环境的优势,适合承受大荷载、大跨度的在原有混凝土双向密肋空心楼盖基础上加以改进而成的一种新型混凝土空心楼盖。该种空心箱体楼盖依赖它的优势,已经在山东区域被大量使用。可是当下对这种改进而来的楼盖研究很少,它的变形特征及受力机理等还不完善。本文侧重于研究这种新型混凝土密肋梁空心箱体楼盖在正常使用荷载和破坏荷载下的结构性能。主要内容有:(1)阐述国内外楼盖的发展和研究情况,叙述混凝土密肋梁空心楼盖的特点与构成,介绍本文主要的内容。(2)讲述混凝土密肋梁空心楼盖的试验过程,通过顺利完成试验验证了此结构施工方案及技术的可操作性。(3)对混凝土密肋梁空心楼盖进行静力加载试验之后,获得了试验试件性能之间的关系及楼盖出现裂缝的时间和极限承载力等结构性能,并对试验数据进行整理,得到楼盖竖向整体位移呈碗型,跨中处竖向位移最大;对裂缝出现时间的统计分析可知板底裂缝最早出现在预制底板上,在正常使用阶段预制底板与肋梁结合处没有裂缝出现,说明在正常使用阶段预制底板可以协调肋梁共同工作,验证了混凝土密肋梁空心楼盖具有较好的整体性;通过最后的破坏试验数据得出该结构的最大承载力。(4)利用ABAQUS软件对混凝土密肋梁空心楼盖建立有限元模型,然后对其模拟计算,对混凝土密肋梁空心楼盖的有限元模拟计算结果与整理后的试验数据对比比较,从而获得结论,为下一步研究这种结构的工作人员提供依据。(5)对本文进行总结,提出该楼盖还需要研究解决的问题,对该楼盖接下来的应用起到规范指导作用。
[Abstract]:Study on the concrete rib beam prefabricated hollow slab is composed of precast concrete slab and the cast-in-place concrete rib beam and cast-in-place roof combination, structure performance with continuous box section. The precast concrete slab and the cast-in-place concrete rib beam and roof to resist external loads, it has good overall performance, precast concrete floor easy manufacture, low material consumption, low cost and is beneficial to protect the environment advantages, suitable for heavy load, large span of a new type concrete hollow slab and improvement in the original concrete two-way hollow ribbed floor. On the basis of the hollow box floor rely on its advantages, has been widely used in the Shandong area. But the moment of this improved little floor research, its deformation characteristics and stress mechanism is not perfect. This paper focuses on the research of this new type of concrete rib beam The structure performance in normal use load and failure load of the hollow box floor. The main contents are as follows: (1) on the development and research situation at home and abroad floor, describes the characteristics and composition of concrete ribbed beam hollow floor system, introduces the main content of this paper. (2) the test process about concrete rib beam hollow floor system. Through the successful completion of the test verify the operability of the structure construction scheme and technology. (3) after the static loading test of concrete ribbed beam hollow floor, the relationship between the performance of the test piece and floor cracks time and ultimate bearing capacity of structure performance, and the test data obtained, the whole floor vertical displacement is bowl shaped, midspan vertical displacement maximum; time statistics analysis in the bottom crack first appeared in the precast floor for cracks in the normal use of precast slab and order With no rib beam cracks, that can coordinate the rib beam work together in the normal use of prefabricated floor, verify the concrete multi ribbed beam hollow floor has good integrity; the maximum bearing capacity of the structure by destroying the test data in the end. (4) of concrete multi ribbed beam hollow floor finite element model using ABAQUS software, then the simulation comparison between experimental data and finishing the comparison of the finite element simulation results of concrete multi ribbed beam hollow floor, so as to obtain the conclusion, provide the basis for the study of the structure of the next step of work. (5) the conclusion of the paper, put forward the need to study and solve the floor the problem on the floor next to the standardized application of the guiding role.

【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU37;TU758.12

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