STUDY ON FIXATION MECHANISM OF COMPOSITE STRUCTURE WITH STUDS ON I-BEAM WEBS

Abstract

 The authors have proposed a concrete composite structure using I-beams with studs in the web as main steel members as an alternative to conventional RC structures. In this study, pullout tests were conducted to clarify the adhesion performance between the proposed structure and concrete and the effect of the Poisson effect. From the results of the pullout tests, it was confirmed that, in addition to the anti-shifting effect of the studs on the web, the Poisson effect causes a compressive force on the concrete between the flanges, which increases the frictional force between the inner surface of the flange and the concrete, thereby increasing the integrity of the proposed structure and the concrete. Furthermore, based on the adhesion characteristics of the proposed structure and concrete, an experiment was conducted to determine the anchorage length when the proposed structure is used as the main steel member. From the experimental results, it was confirmed that if the anchorage length is six times or more than the web height of the I-beam, the I-beam will not pull out until the steel yields, and the anchorage is secured.