Study On Mechanical Properties Of Ordinary Concrete Cooled By Water Spray After High-temperature

When the fire occurs,the concrete structure is seriously damaged,causing great losses to the state and society.Whether concrete structure can continue to use cooled by water spray after high temperature is an important issue.Therefore,scholars around the world have launched a large number of experimental research and theoretical analysis on the mechanical properties of concrete structure cooled by water spray after high temperature.108 concrete specimens were designed,of which 96 were high-temperature specimens cooled by water spray and 12 were normal temperature specimens.And all specimens were loaded statically and their mechanical properties were analyzed.The characteristics of the specimens after high temperature were obtained by high temperature test,and the physical changes of the specimens under the influence of different temperatures and high temperature time were analyzed.The failure modes of the specimens were observed by static loading test,and the characteristic parameters such as peak load and peak displacement were obtained.The results show that the temperature has the most obvious effect on the axial compressive properties of the concrete specimens,second is the high temperature duration.Finally,according to the test results,some suggestions are put forward for evaluating the residual strength of ordinary concrete after fire and sprinkler cooling.