The Research On Mechanical Behavior And Bond-slip Properties Of Embedded Column Base Under Horizontal Load

It is necessary to study deeply the bond-slip properties and mechanical behavior of embedded column base so as to calculate and analyze it reasonably .Based on the former test, Embedded Electronic Steel-Concrete Slip Transfer was manufactured. It makes effective measurement on the internal sliding of steel reinforced concrete come true, and provides a basis for the further study on the mechanical properties and bond-slip properties of embedded column base in bending stste.This paper designed six specimens of embedded column base ,and the main paramenters influencing force performance, such as depth ratio,stud connectors,plate and the relative eccentricity etc were taken into consideration.Electronic Steel-Concrete Slip Transfer were respectively placed on the tensile side and compression side of steel flanges ,meanwhile electronic strain gauges were also installed at that positions.The change of the mechanical behavior and internal sliding of embedded column base in the whole process of loading was fully observed.The bond-slip relationship considered the normal stress was obtained on the basis of the experimental results; and it can provide constitutive model for the numerical analysis on whole stress deformation of steel reinforced concrete.Finite element analysis software ABAQUS was used on the specimen to simulate the force– deformation, and the results are in good agreement with the experiment results through comparison. In order to fully explore the embedded force performance, 29 numerical models of embedded column-base were established in this paper, and set embedded depth ratio,stud connectors ,concrete strength grade etc as parameters to make a systematic analysis about their impacts on the performance of embedded column bases.