Effect of pre-stressed cable on pre-stressed mega-braced steel frame

作者：Baijian Tang, Fuxing Zhang, Yi Wang, Wang Fei · 发表于：STRUCTURAL ENGINEERING AND MECHANICS · 年份：2016 · DOI：10.12989/sem.2016.59.2.327 · 被引用次数：4 · 研究领域：Seismic Performance and Analysis、Vibration and Dynamic Analysis、Structural Response to Dynamic Loads

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.