RESEARCH PROGRESS ON INFLUENCE OF HIGH TEMPERATURE ON MECHANICAL PROPERTIES OF CONCRETE
As one of the most widely used building materials in the world,the mechanical properties of concrete under high temperature conditions have an important impact on structural safety.In this paper,the research results about the influence of high temperature on the mechanical properties of concrete at home and abroad are summarized,and the changing rules of the mechanical properties of concrete at different temperatures are analyzed.By way of research review,the relevant literature published in recent years is collected and sorted out,focusing on the influence of high temperature on compressive strength,tensile strength,flexural strength and elastic modulus of concrete.The results show that the compressive strength,tensile strength,flexural strength and elastic modulus of concrete decrease significantly under the action of high temperature.The higher the temperature and the longer the duration,the more obvious the deterioration degree of concrete.In addition,the tensile strength and flexural strength are affected by the cooling method and cooling rate of the concrete.
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