Browsing by Author "Othman, Mohammed Moatasem Othman"
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Item FINITE ELEMENT ANALYSIS OF CONCRETE ENCASED STEEL COMPOSITE COLUMNS AND REINFORCED CONCRETE BEAMS(2022-01-11) Othman, Mohammed Moatasem Othman; Tunç, Gökhan; Mertol, Halit CenanThe composite structural system includes two major structural systems which are concrete structural system and steel structural system. In this study, two specimens have been modeled in LS-DYNA software to study the seismic efficiency and vulnerability of the composite column-beam joints against shear and axial failures based on the experimental tests that were conducted at the laboratory. The first specimen was with High Ductility (HD) and the second one was with Low Ductility (LD), and the reinforcement designed according to the Turkish Earthquake Code (TEC 18), then the results have been compared with the results of experimental specimens. The study investigated the cracks and failure patterns, load-deflection envelope, dissipation, and degradation of simulated models. Also, another 12 specimens have been conducted and simulated in the LS-DYNA which is based on the two models to assess the performance of the frame with alteration of several parameters such as steel section availability, concrete grade, steel section type, and ductility. The results show that the finite element models provide an approached result to the experimental test, also, it indicates that the specimen with high ductility shows slightly better seismic performance than the low ductility specimen. Moreover, the parametric study demonstrates that the steel availability in the frame regardless of the type of the steel is the most important parameter to improve the frame’ seismic performance, then the concrete grade comes as the second parameter regarding significance, while the steel section type and transfer reinforcement ratio in a composite column do not show a significant impact.