PUSH-OUT TESTS ON STUDS IN HIGH-STRENGTH AND NORMAL STRENGTH CONCRETE

Some test results from push-out tests of studs in normal and high stre ngth 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 n egligible effect when high strength concrete is used and some effect w hen normal concrete is used. The present design code is not adequate t o estimate the shear strength of studs embedded in high strength concr ete and it is suggested that a design formula that takes account of th e interaction between the studs and the surrounding concrete should be used.