Yuan X., Chen X., 2018, Effect Analysis of Expansion Agent on Interfacial Bond Behavior of Concrete Filled Steel Tubular, Chemical Engineering Transactions, 66, 1165-1170.
Three concrete filled steel tube (CFST) push out specimens with different expansive agent (EA) content were made to investigate the effect of EA on interfacial bond behavior of CFST. Test results analysis show that the interfacial bond behavior of the CFST can be effectively improved, but in the aspect of changing the local maximum bonding stress of the interface, there is an optimum amount of expansion agent; the distribution curve of interfacial bond stress along the steel tube height x shows that the maximum bonding stress of the interface occurs at a certain position of the free end; the increasing effect of EA should be considered in calculating the interfacial bond stress.
