Push-out tests on studs in high strength and normal strength concrete

Abstract

Some test results from push-out tests of studs in normal and high strength concrete are presented. It is found that the concrete compressive strength significantly affects the strength of the stud connections. Increase of the transverse reinforcement in the concrete slabs has a negligible effect when high strength concrete is used and some effect when normal concrete is used. The present design code is not adequate to estimate the shear strength of studs embedded in high strength concrete and it is suggested that a design formula that takes account of the interaction between the studs and the surrounding concrete should be used.