Techno Press

Structural Engineering and Mechanics   Volume 50, Number 4, May25 2014, pages 459-469
Failure analysis of steel column-RC base connections under lateral cyclic loading
Serhat Demir, Metin Husem and Selim Pul

Abstract     [Full Text]
    One of the most important structural components of steel structures is the column-base connections which are obliged to transfer horizontal and vertical loads safely to the reinforced concrete (RC) or concrete base. The column-base connections of steel or composite steel structures can be organized both moment resistant and non-moment resistant leading to different connection styles. Some of these connection styles are ordinary bolded systems, socket systems and embedded systems. The structures are frequently exposed to cycling lateral loading effects causing fatal damages on connections like columns-to-beams or columns-to-base. In this paper, connection of steel column with RC base was investigated analytically and experimentally. In the experiments, bolded connections, socket and embedded connection systems are taken into consideration by applying cyclic lateral loads. Performance curves for each connection were obtained according to experimental and analytical studies conducted and inelastic behavior of connections was evaluated accordingly. The cyclic lateral performance of the connection style of embedding the steel column into the reinforced concrete base and strengthening of steel column in upper level of base connection was found to be higher and effective than other connection systems. Also, all relevant test results were discussed.
Key Words
    embedded steel column bases; steel columns; reinforced concrete; cyclic loading; finite element analysis
Serhat Demir, Metin Husem and Selim Pul : Department of Civil Engineering, Karadeniz Technical University, 61080, Trabzon, Turkey

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