ADVANCES IN CIVIL ENGINEERING, İstanbul, Turkey, 21 - 23 September 2016, vol.1, no.1, pp.1-8
Currently, there has been significant interest in behavior of structures under shock and impact loadings. Development of computational mechanics has facilitated the modeling of such load conditions. The studies on the steel circular hallow section (CHS) structural elements have shown that systems are not have adequate strength under extreme loading conditions. The studies are based on analysis of the behavior of many joints (K-Joint, T-joint). In order to investigate behavior of tubular K-joints subjected to impact loadings, numerical investigations were carried out with finite element analysis (FEA). In this study, K-joints were modeled with two unstiffened and three stiffened configurations for determination of stiffening process. The impact loading was modeled as drop weight impact test. As a result of the analyses, the transverse impact forces, maximum indentation depth and failure modes of K-joints were obtained. Based on the numerical results, the plastic deformations of tubular K-joint under impact loading depends whether or not by using the stiffeners. Moreover, the stiffeners enhanced impact resistance of tubular K-joints.