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Steel and Composite Structures Volume 41, Number 4, November25 2021 , pages 567-580 DOI: https://doi.org/10.12989/scs.2021.41.4.567 |
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Experimental study and finite-element analysis of shear wall with CFST, column-form reinforcement, and diagonal bars |
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Hao Su, Lihua Zhu and Yaohong Wang
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| Abstract | ||
| A new type of composite shear wall with concrete-filled steel tubular frames, column-form reinforcement, and diagonal bars (CFST-CFR-DBSW) was proposed to develop high-efficiency lateral force resistance components for high-rise buildings. In order to study the seismic performance of the new shear wall, four specimens were designed: the new shear wall (CFST-CFR-DBSW), a shear wall with column-form reinforcement and diagonal bars (CFR-DBSW), an ordinary reinforced concrete shear wall (RCSW), and an ordinary reinforced concrete shear wall with concrete-filled steel tubular frames (CFST-RCSW). These specimens were constructed, and then tested under low-cycle loading. Using the experimental results, the anti-seismic behavior indexes of the four specimens were analyzed, including failure mode, bearing capacity, ductility, energy dissipation, stiffness degradation, and damage. A finite-element model of the new shear wall was established with ABAQUS to investigate the influence of the thickness of the steel tube, concrete strength, diameter of the column-reinforcement, and diameter of the diagonal bars on the seismic performance of the shear wall specimen. The research results showed that, compared with other specimens, CFST-CFR-DBSW was significantly strengthened with respect to bearing capacity, deformation, energy dissipation, stiffness, and damage. In addition, the results calculated by the ABAQUS finite-element model was in good agreement with the experimental results, and the influence rules of relevant parameters on the seismic performance of CFST-CFR-DBSW were obtained. | ||
| Key Words | ||
| column-form reinforcement; concrete-filled steel tubular frames; damage model; diagonal bars; finite-element analysis; seismic behavior | ||
| Address | ||
| Hao Su: School of Civil Engineering, Xi'an University of Architecture and Technology, No.13, Yanta Road, Xi'an, Shaanxi, China Hao Su and Lihua Zhu: School of Civil Engineering, Xi'an University of Architecture and Technology, No.13, Yanta Road, Xi'an, Shaanxi, China; Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education (Xi'an University of Architecture and Technology), No.13, Yanta Road, Xi'an, Shaanxi, China Yaohong Wang: School of Civil Engineering, Inner Mongolia University of Technology, No.49, Aimin Street, Hohhot, Inner Mongolia, China | ||