Research progress on mechanical properties of concrete after high temperature water cooling
The degradation of mechanical properties of concrete materials at high temperatures has been widely studied.More serious damage will be caused in water cooling of concrete structures by fire fighters during fire rescue.The research on the high temperature water cooling of concrete by domestic and foreign scholars is based on the mechanical properties of materials such as concrete compressive strength,tensile strength,compressive stress-strain curve(elastic modulus,peak stress,peak strain,constitutive relationship)as influencing factors.The results are summarized and analyzed,and it is found that the main factor affecting the mechanical properties such as compressive strength after water cooling is the fire temperature,which is also related to the fire time,the standing time after cooling,the water cooling method and the type of concrete.The higher the temperature,the greater the strength deterioration,and the residual strength after natural cooling is higher than that after water cooling.In addition,it is found that the research on the influence of water cooling method,water cooling time and water cooling intensity on the mechanical properties of concrete is still blank,and there is a lack of quantitative description between the microscopic changes and the decline of macroscopic mechanical properties.The problem of lack of simulation calculation indicates the focus of future research work.
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维普
