Causes And Control Of Temperature Contraction Cracks In Cast-in-Place Reinforced Concrete Floor

With the rapid development of commercial concrete, the booming development of the concrete structure has got up because of its good integrity, convenience, which has become the choice of most designers. However, contraction of cast's structure and its large shrinkage of temperature deformation are prone to cause the crack of cast concrete floors, which has turned into a regular occurrence of quality defects. Such complaints on quality defects are very common in the complaints of the owners.To further investigate the problem of cracks in engineering field, and to solve this problem, this paper summarizes the basic concepts of cracks in reinforced concrete structures and its generating principle, based on the research of the predecessors. This paper aims to explain the causes, control measures of cracks in reinforced concrete structures from three systems of the construction, design and materials, and try to point out the key to prevention of cracks lies in controlling temperature and shrinkage deformation and give a specific explanation about structure identification, causes of cracks, reinforcement design, the whole process of crack treatment organized by construction in actual projects examples. Furthermore, the causes of the floor temperature's shrinkage have been analyzed through calculating with the help of theoretical formula.Finally, this paper simplify impacts of contraction and temperature effects on cracking by using Finite element analysis software, which aims to produce a practical guidance in the preparation of engineering structures' resisting cracking, construction and crack repair measures.