Study On The Force Transfer Behavior Of SRC Members With Stud Shear Connectors Under And After High Temperature

The steel reinforced concrete (SRC) short columns with stud connectors were statically testedto study the force transfer behavior by the push-out tests under and after high temperature. In orderto analyze the influence on the force transfer behavior, the main four factors, including the highestheating temperature, time maintained at the highest temperature, the stud placement position, andthe steel shape embedment length were considered. According to the longitudinal shear transfermechanism, failure pattern, crack mode, load-slip characteristics, and shear force transmissioncapacity of steel reinforced concrete specimens with stud connectors, the force transfer calculationformula on the steel reinforced concrete short columns with stud connectors under and after hightemperature were put forward.20standard push-out test specimens for under high temperature,20standard push-out testspecimens for after high temperature and2comparison specimens were designed to find theinfluence of the force transfer behavior. According to test requirements, the electric heating furnacewas used to heat the corresponding specimens and record the elevated temperature simultaneously.By the displacement meter on the loading end and free end, the relative slip between steel andconcrete could be measured. The test process, including the failure pattern, load-slip characteristics,the sudden change in the bearing capacity and so on, was observed and recorded carefully.According to the test results, the major factors, including the highest heating temperature,time maintained at the highest temperature, the stud placement position, and the steel shapeembedment length, was analyzed fully to find the law of the force transfer behavior. Meanwhile,the research results about the force transfer behavior under normal temperature and the bond-slipconstitutive relation under and after high temperature were also considered. Finally, the coefficientof influence about the bearing capacity was defined by the highest heating temperature, and timemaintained at the highest temperature. A reduction factor was also introduced to consider thedifferent of the highest elevated temperature. The force transfer calculation formula on the SRCshort columns with stud connectors under and after high temperature was put forward.