Temperature Effects on Concrete Structure Cracks by ANSYS

摘要

Due to its high strength, good durability, concrete is widely used in various types of buildings and structures. With the continuous development of engineering and technology, all kinds of new, unique shape structure, the use of mass concrete structure is more and more widely. But big volume concrete block, its thermal performance is poorer, inside the concrete hydration heat accumulation is difficult to spread, surface heat faster, the center temperature and the surface temperature of the temperature difference will cause concrete crack; In addition, the elastic modulus, coefficient of relaxation, could also change along with the change of temperature, time, you can always cracking of concrete. How to control the mass concrete cracking, is always the key and the difficulty of structure and construction. In this paper, on the basis of a lot of practice, summarizes the characteristics of mass concrete, concrete cracking reason, and from two angles of the design and construction, analyzes the limited measures of mass concrete cracking control. For real reflect the temperature field and temperature stress of engineering, based on the large finite element software ANSYS, simulation analysis of mass concrete temperature field and temperature stress, and the following conclusions. Through the contrast analysis, concrete temperature crack control to set according to different season, summer temperature is higher, to take appropriate cooling method to control, to avoid late concrete internal temperature rapidly reduced. And to pay attention to the thermal insulation of concrete in winter, avoid frost crack.