Experimental and numberical study on seismic behavior of reinforced concrete L-shaped column
In the reinforced concrete multi-story buildings, L-shaped columns provide high efficiency in increasing the overall flexural stiffness as well as usable space. However, the disadvantage of this type of vertical structural elements may be their post elastic behavior. When vertical and horizontal loads are large, these columns tend to be unstable due to their very thin and slender walls. This paper presents experimental and numerical investigation on L-shaped columns under the seismic action. In the experimental investigations, one-half scaled columns were tested to failure using one-direction shaking table. In numerical investigation, a finite element model, after being verified with the current experimental results, was used to investigate the effects of concrete strength and reinforcement ratios on the seismic behavior of RC L-shaped columns. Based on the research results, design recommendations for such type of columns are discussed.
Received: June 18th, 2017; revised: August 17th, 2017; accepted: February 28th, 2018