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Structural Engineering and Mechanics Volume 59, Number 2, July25 2016 , pages 327-341 DOI: https://doi.org/10.12989/sem.2016.59.2.327 |
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Effect of pre-stressed cable on pre-stressed mega-braced steel frame |
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Tang Baijian, Zhang Fuxing, Wang Yi and Wang Fei
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| Abstract | ||
| This study addresses the effect of pre-stressed cables on a pre-stressed mega-braced steel frame through employing static analysis and pushover analysis. The performances of a pre-stressed mega-braced steel frame and a pure steel frame without mega-braces are compared in terms of base shear, ductility, and failure mode. The influence of the cable parameters is also analyzed. Numerical results show that cable braces can effectively improve the lateral stiffness of a pure frame. However, it reduces structural ductility and degenerates structural pre-failure lateral stiffness greatly. Furthermore, it is found that 20% fluctuation in the cable pretension has little effect on structural ultimate bearing capacity and lateral stiffness. As comparison, 20% fluctuation in the cable diameter has much greater impact. | ||
| Key Words | ||
| steel frame; pre-stressed mega-brace; pushover analysis; lateral stiffness; failure mode | ||
| Address | ||
| Tang Baijian, Zhang Fuxing, Wang Yi and Wang Fei: School of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Mengxi Road, Zhenjiang 212003, China | ||