EXPERIMENTAL STUDY ON BOND-SLIP BEHAVIOR AND BEARING CAPACITY OF CORRUGATED STEEL PLATE CONCRETE COMPOSITE MEMBER WITH STUD

Eleven corrugated-steel-plate concrete composite members with studs and one comparative corrugated-steel-plate concrete member without studs on the surface of corrugated steel plate were statically tested to study the failure pattern, crack mode, load-slip characteristics, corrugated steel plate strain distribution and bearing capacity of corrugated-steel-plate concrete specimens with studs. The test results exhibit that concrete split failure is the main failure pattern of specimens with studs. The load-slip curves of specimens consists of the rising stage, the descending stage and the residual stage. Due to the action of concrete and studs, the free end of the corrugated steel plate has a tension stress area and a zero-value crossing phenomenon is generated. The shear bearing capacity of corrugated-steel-plate concrete composite specimens increases linearly with the increasing of diameter and quantity of the studs, but it is little affected by the stud length and thickness of corrugated steel plate. In addition, increasing the spacing of the studs within the range of 200 mm can improve the shear bearing capacity. Based on the analysis on experimental results and force spread principles of the specimens, both the constitutive model for the interface bond-slip of corrugated-steel-plate concrete considering the effect of studs and the formula for calculating the bearing capacity are presented. The results from the proposed model is in a good agreement with test results. The results of the bearing capacity formula are not only generally consistent with the test results, but also on the safe side.