现浇混凝土楼板裂缝分析及综合控制措施

发布时间：2018-01-11 03:26

本文关键词：现浇混凝土楼板裂缝分析及综合控制措施　出处：《中南大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着商品混凝土和泵送技术的广泛应用,施工周期大大缩短,在这种情况下,现浇钢筋混凝土楼板不同程度地出现了裂缝。这种裂缝常常引起楼板渗漏、钢筋腐蚀、混凝土碳化等现象,引起业主的投诉并影响到结构的使用寿命。针对现浇混凝土楼板裂缝,本文进行了以下几个方向的工作： 1.从概念上分析现浇混凝土楼板结构裂缝的类型、主要特征、形成机理以及发育过程。 2.从设计和施工两个方面对现浇混凝土楼板裂缝的产生因素进行分析,并提出相应的控制措施,结合工程实例对如何控制现浇混凝土楼板裂缝进行讨论。 3.为了更好的防止裂缝的产生,提出裂缝的综合控制方法,即综合考虑各方面原因,从多道工序上采取相应措施,对设计及施工具有一定的指导意义。 4.结合工程实例,采用分离式建模方法,对钢筋混凝土楼板进行了模拟计算,结果表明有限元在用于分析钢筋混凝土裂缝方面是可行的,并依据计算中板的薄弱位置和裂缝产生的过程提出了防治建议。
[Abstract]:With the wide application of commercial concrete and pumping technology , the construction period is shortened greatly . In this case , the cast - in - place reinforced concrete floor has cracks in different degrees . This kind of crack often causes the phenomena of floor leakage , reinforcement corrosion , concrete carbonation , etc . , which causes the owner ' s complaint and affects the service life of the structure . In view of the cracks of cast - in - place concrete floor slab , the following directions are worked out : 1 . The types , main characteristics , forming mechanism and development process of the cracks in cast - in - place concrete floor slab are analyzed conceptually . 2 . The factors of the cracks of cast - in - place concrete floor slab are analyzed from two aspects of design and construction , and corresponding control measures are put forward , and how to control the cracks of cast - in - place concrete floor slab is discussed in combination with engineering examples . 3 . In order to prevent the occurrence of cracks , the comprehensive control method of cracks is put forward , that is , the reasons of various aspects are comprehensively considered , and corresponding measures are taken from the multi - step process , which has certain guiding significance for the design and construction . 4 . Combined with the engineering example , the steel reinforced concrete floor slab was simulated by means of separate modeling method . The results show that the finite element is feasible in the analysis of the crack of reinforced concrete , and the prevention and cure suggestion is put forward based on the weak position of the plate and the process of crack .

【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU755

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