Seismic performance of prefabricated cable-braced steel frames

4^th International Conference on Advanced Steel Structures

November 09-10, 2017 Singapore

Zixuan Shang, Xuechun Liu, Xiaoxiong Cui and Lu Xu

Beijing University of Technology, China

Scientific Tracks Abstracts: J Steel Struct Constr

Abstract :

Given their superior performance, steel cables have been used in steel structures as braces, but the studies on this topic have not been sufficient. A new type of prefabricated cable-braced steel frame is proposed in this paper. To investigate the seismic performance of a prefabricated cable-braced steel frame, quasi-static tests and finite element analysis are performed on a pure steel frame and on four pairs of cable-braced frames. One frame exhibited no pretension and the other exhibited pretension in each pair. All of the frames were the same, while the cables included different cross-sectional areas among the four pairs. The analysis examines the hysteresis performance, bearing capacity, ductility, self-centering capabilities and failure modes of the four pairs of cable-braced frames and pure frames. The influence of cable cross-sectional areas on the cable tension, hysteresis performance, bearing capacities, ductility, self-centering capabilities and elastic-plastic development of the cable-braced frames is studied relative to the pure frame. The results of the tests and finite element analysis (FEA) are nearly uniform. The results indicate that cable-braced frames exhibit reasonable levels of hysteresis performance, energy dissipation and self-centering. A larger cable cross-sectional area enables superior self-centering capabilities and more pronounced levels of rigidity degradation. The energy dissipation capacity and displacement ductility initially increase followed by a subsequent decrease with increasing cable cross-sectional area. The influencing factors of lateral stiffness and the load-bearing mechanisms of cable-braced frames are revealed from a theoretical formula of lateral stiffness and from an analysis of bearing capacity and the influence of pretension on cable-braced frames are obtained. References 1 .Liu X C, Yang Z W, Wang H X, et al. (2017) Seismic performance of H-section beam to HSS column connection in prefabricated structures. Journal of Constructional Steel Research; 138: 1-16. 2. X C Liu, S H Pu and A L Zhang (2017) Performance analysis and design on bolted connections in modularized prefabricated steel structures. Journal of Constructional Steel Research; 19(9): 183-195, 2017. 3 .Xuechun Liu, Yiwen Zhang, Ailin Zhang, Liang Wu (2017) Model Test for the Tensioning Construction Process of a Large-Span Prestressed Suspended Dome. Advances in Structural Engineering; 20(4): 504-518. 4 .Xuechun Liu, Xinxin Zhan, Ailin Zhang, Xun Zhang, Chen Tian (2017) Random imperfection method for stability analysis of suspended dome. International Journal of Steel Structures; 17(1): 91-103.

Biography :

Zixuan Shang is pursuing graduation from the College of Architecture and Civil Engineering of the Beijing University of Technology, China. Her research interests focus on prefabricated steel high-rise steel structures.