STUDY ON THE BONDING PROPERTIES OF SEMI-GROUT SLEEVE OF STEEL BAR UNDER INITIAL STRESS AT HIGH TEMPERATURES
This paper studies the failure mode and bearing capacity of specimens under thermal coupling,as well as the variation law of the bond slip curve of steel grout in sleeve connected specimens under different condition vari-ables.Axial tensile tests on 48 steel semi grouted sleeve connected specimens under different initial stress condi-tions at room temperature and high temperatures are carried out,from which the bond slip relationship equations be-tween steel bars and grouting materials at different temperatures are fitted.Finite element simulation is conducted on the bond slip between steel bars and grouting materials in the semi grouting sleeve of steel bars to verify the ratio-nality and accuracy of the bond slip formula obtained from the experiments.
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