Evaluation and comparison of seismic behavior of composite and steel shear-walls in construction frames with semi-enclosed composite columns

Document Type : Research Article

Authors

1 Associate Professor, Department of Civil Engineering,Faculty of Engineering, Islamic Azad University of Ahvaz

2 IAU of Abadan

Abstract

The research purpose is to evaluate and compare the seismic behavior of composite and steel shear-walls in construction frames with semi-enclosed composite columns. The numerical behavior of composite and steel shear-walls with semi-enclosed columns was investigated and then the parameters affecting the seismic behavior of the composite shear-walls under cyclic loading were analyzed with the Abaqus software. Software validation was performed with two laboratory samples. The results showed that the use of Semi-enclosed columns increased by 48% and 56% in the ultimate strength of the composite shear-walls with unilateral and bilateral concrete. These columns improved ductility and energy depletion. The semi-enclosed columns caused a 15% increase in the ultimate strength of the steel shear-walls and had a limited impact on energy absorption. The increase in steel plate thickness of the composite shear-walls from 2 to 4 and 4 to 6 mm, resulted in 16% and 14% improvement in the ultimate strength and energy depletion, respectively. The gap of 11.3 mm between the steel frame and the concrete wall was optimum. By reducing the diameter of the gap to 6.5, the strength decreased by 1.5% and with increasing the diameter of the gap to 9.16 mm, strength dropped by 7%. By increasing the thickness of the cross-section of the composite columns from 2 to 5 and from 5 to 8 mm, the strength increased 25.3% and 12.1%, respectively. With an increase in strength of concrete from 30 to 72.5 MPa (142% increase), the structural strength increased by only 15%.

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References

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Amirkabir Journal of Civil Engineering
Volume 52, Issue 4
July 2020
Pages 809-826

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