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Appl. Sci. 2017, 7(1), 53; doi:10.3390/app7010053

Thin-Walled CFST Columns for Enhancing Seismic Collapse Performance of High-Rise Steel Frames

1
Department of Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2
School of Architectural Engineering, Beijing University of Technology, Beijing 100124, China
3
Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
*
Author to whom correspondence should be addressed.
Academic Editor: Zhong Tao
Received: 30 November 2016 / Revised: 21 December 2016 / Accepted: 24 December 2016 / Published: 5 January 2017
(This article belongs to the Special Issue Applications of Thin-Walled Structures)
View Full-Text   |   Download PDF [3800 KB, uploaded 5 January 2017]   |  

Abstract

This paper numerically studied the collapse capacity of high-rise steel moment-resisting frames (SMRFs) using various width-to-thickness members subjected to successive earthquakes. It was found that the long-period component of earthquakes obviously correlates with the first-mode period of high-rises controlled by the total number of stories. A higher building tends to produce more significant component deterioration to enlarge the maximum story drift angle at lower stories. The width-to-thickness ratio of beam and column components overtly affects the collapse capacity when the plastic deformation extensively develops. The ratio of residual to maximum story drift angle is significantly sensitive to the collapse capacity of various building models. A thin-walled concrete filled steel tubular (CFST) column is proposed as one efficient alternative to enhance the overall stiffness and deformation capacity of the high-rise SMRFs with fragile collapse performance. With the equivalent flexural stiffness, CFST-MRF buildings with thin-walled members demonstrate higher capacity to avoid collapse, and the greater collapse margin indicates that CFST-MRFs are a reasonable system for high-rises in seismic prone regions. View Full-Text
Keywords: thin-walled structures; concrete filled steel tubes; high-rise buildings; seismic performance; dynamic collapse; local buckling thin-walled structures; concrete filled steel tubes; high-rise buildings; seismic performance; dynamic collapse; local buckling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Bai, Y.; Wang, J.; Liu, Y.; Lin, X. Thin-Walled CFST Columns for Enhancing Seismic Collapse Performance of High-Rise Steel Frames. Appl. Sci. 2017, 7, 53.

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