Experimental research on mechanical properties of 600 MPa steel rebar in high temperature
YU Sujian
BU Guoyan
GAO Litang
Abstract：In order to get the mechanical properties in high temperature,the strength and deformation experiment of 600 MPa steel rebar in temperature-stress is done.One is steady state test and the other is transient test.The experiment results show that,with the rise of temperature,the ultimate strength and yield strength is decreased,particularly between 400 ℃ and 600 ℃ and the declining rate of yield strength is faster than ultimate strength.In temperature between 300 ℃ and 700℃,the strength in the second way is slightly higher than that in the first one.Beyond that,the strength in the two ways has a little difference.The stress-strain curve under high temperature is significent different with it in normal temperature.With the rise of temperature,the yield step is disappeared and the strengthening segment is shortened gradually.When the temperature is 400 ℃,the ultimate elongation decreases to the minimum.It is composed of the rising slope with decreasing gradient gradually and gentle decline after peak point between 500 ℃ and 800 ℃;With the rise of temperature,the elastic modulus decreases and free expansion deformation shows a growth trend of the power function.
Keywords：600 MPa steel rebarhigh temperaturedeformationstress-temperature coupling
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 119-125 )