Investigation of cyclic behavior and performance of steel beam to a reinforced concrete column with double-skin steel tubular

Document Type : Original Article

Authors

1 Ph.D. Candidate, Department of Civil Engineering, Maragheh branch, Islamic Azad University, Maragheh, Iran.

2 Assistant Professor, Department of Civil Engineering, Maragheh branch, Islamic Azad University, Maragheh, Iran.

3 Assistant Professor, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran.

Abstract

The use of steel beam connection system to reinforced concrete columns has been used as an alternative to steel bending frames in medium and high-rise buildings. In high-rise buildings, because the rigidity of the structure controls the design, the use of concrete columns with more rigidity compared to steel columns makes the design economical. In this study, the seismic behavior and energy-dissipation of steel beam to reinforced concrete column connection with double-skin steel tubular are investigated using numerical methods. This system improves the hysteresis behavior and performance of traditional steel beams to reinforced concrete column connection. To evaluate the steel beam's hysteresis behavior and energy absorption to reinforced concrete column connection with double-skin steel tubular system, parametric studies were performed. Parametric studies have been performed applying the nonlinear finite element (MFE) procedure to investigate the improved models. The parametric studies comprise examining the parameters of thickness and cross-section shape of an inner tube. Also, the accuracy of finite element models was evaluated by comparing test results that showed the good accuracy of finite element models in predicting the specimens' hysteresis behavior and failure modes. The results indicated that the thickness of the inner tube of improved models has a considerable influence on determining the ultimate capacity, performance, and energy dissipation. Also, the results show that the details of the construction of the internal tube were a considerable effect on the performance and hysteresis behavior of steel beam to reinforced concrete column connection with double-skin steel tubular.

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Main Subjects


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