现浇钢筋混凝土楼板非荷载裂缝影响研究

发布时间：2018-10-12 08:14

【摘要】：建筑工程中的裂缝问题,长期困扰着相关从业人员及专家学者。新技术、新材料在建筑工程中应用的越来越普及,裂缝的现象也越来越常见,因此裂缝也成了迫切需要解决的技术难题。近代建筑材料的研究认为,有裂缝是绝对的,无裂缝是相对的,因此,建筑物的裂缝是不可避免的。本文结合工程实践对建筑工程中最为常见的钢筋混凝土现浇楼板裂缝问题进行了探讨,从混凝土材料方面、施工因素方面、设计方面综合归纳分析了这类裂缝产生的成因,提出了要防止裂缝的出现,须从材料、设计、施工等方面采取综合控制的方法和措施。本文结合相关文献,阐述了裂缝的基本概念、开展机理,介绍了裂缝的基本形式、常见形态,分析了裂缝产生原因与导致非结构裂缝出现的混凝土收缩因素产生的机理及其影响因素,并从设计和施工两方面综合论述了裂缝出现的成因,根据不同原因提出了相应的防治措施,并介绍了裂缝修复处理的方法。结合工程实例,运用有限元软件ANSYS建立理论模型,研究了非荷载裂缝对楼板受力性能的影响,提出了施工防范措施与修复加固建议。
[Abstract]:The problem of cracks in construction projects has long troubled the relevant practitioners and experts. The application of new technology and new materials in construction projects is becoming more and more popular, and the phenomenon of cracks is becoming more and more common. Therefore, cracks have become an urgent technical problem to be solved. The research of modern building materials holds that cracks are absolute and no cracks are relative, therefore, cracks in buildings are inevitable. Combined with engineering practice, this paper discusses the most common cracks in reinforced concrete cast-in-place floor slabs. The causes of these cracks are summarized and analyzed from the aspects of concrete materials, construction factors and design. In order to prevent the occurrence of cracks, it is necessary to adopt comprehensive control methods and measures from the aspects of material, design and construction. In this paper, the basic concept and mechanism of fracture are expounded, and the basic forms and common forms of fracture are introduced. This paper analyzes on the causes of cracks and the mechanism and influencing factors of concrete shrinkage factors which lead to unstructured cracks, and discusses the causes of cracks synthetically from the aspects of design and construction. According to different reasons, the corresponding prevention and treatment measures are put forward, and the methods of crack repairing and treatment are introduced. Combined with engineering examples, the theoretical model is established by using finite element software ANSYS, and the influence of non-load cracks on the behavior of floor is studied, and the construction preventive measures and suggestions for repairing and strengthening are put forward.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU755.7

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