Experimental and analytical investigation on seismic behavior of Q690 circular high‐strength concrete‐filled thin‐walled steel tubular columns

2019 ◽  
Vol 28 (5) ◽  
pp. e1583
Author(s):  
Jiantao Wang ◽  
Qing Sun ◽  
Xiaohong Wu ◽  
Yongcai Wu
Keyword(s):  
High Strength Concrete ◽  
Seismic Behavior ◽  
High Strength ◽  
Analytical Investigation ◽  
Strength Concrete ◽  
Tubular Columns ◽  
Thin Walled

Cyclic testing of Q690 circular high-strength concrete-filled thin-walled steel tubular columns

2018 ◽  
Vol 22 (2) ◽  
pp. 444-458 ◽  
Author(s):  
Jiantao Wang ◽  
Qing Sun
Keyword(s):  
High Strength Concrete ◽  
Low Cycle Fatigue ◽  
High Strength ◽  
Seismic Action ◽  
Cycle Fatigue ◽  
Seismic Behaviour ◽  
Strength Concrete ◽  
Tubular Columns ◽  
Study Results ◽  
Thin Walled

Under seismic action, the severe damage in critical regions of structures could be ascribed to the cumulative damage caused by cyclic loading. This article describes an investigation of the hysteresis behaviour of Q690 circular high-strength concrete-filled thin-walled steel tubular columns with out-of-code diameter-to-thickness ratios. A total of eight specimens were tested under constant axial compression and cyclic lateral loading. The study results of phase I testing consisting of a benchmark test were summarized to examine the seismic behaviour under standard loading, and those of the phase II testing that considered different fatigue loading modes and different concrete strengths were summarized to investigate the low-cycle fatigue behaviour. The load–displacement hysteretic curves, energy dissipation, strength and stiffness degradation were discussed in detail. A simplified method was proposed to predict the low-cycle fatigue life, which can be applied in the damage-based seismic design of circular concrete-filled steel tubular structures.

08.05: Design of high strength concrete filled tubular columns

ce/papers ◽  
2017 ◽  
Vol 1 (2-3) ◽  
pp. 1869-1878
Author(s):  
J Y Richard Liew ◽  
Mingxiang Xiong ◽  
Yan-Bo Wang
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Strength Concrete ◽  
Tubular Columns

scholarly journals Performance Evaluation of Q690 High-Strength Concrete-Filled Thin-Walled Steel Tubular Columns under Compression-Bending Coupling

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Jiantao Wang ◽  
Qing Sun
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Significant Degree ◽  
Economic Benefits ◽  
Assessment Model ◽  
Range Analysis ◽  
Engineering Structures ◽  
Widespread Application ◽  
Strength Concrete ◽  
Thin Walled

The high-strength concrete-filled thin-walled steel tubular (HCFTST) columns, as a relatively new type structure member, could reduce the section size to obtain the favorable architecture aesthetic effects and gain further economic benefits. In this paper, the HCFTST columns were optimized on the basis of the orthogonal array of L16 (45) with three tested parameters. The orthogonal range analysis (ORA) was utilized to research the alteration degree, and the orthogonal variance analysis (OVA) was employed to analyze the significant degree between different parameters. Moreover, the optimized combinations based on performance index including strength, ductility, and energy dissipation were recommended to offer certain reference for structural design and application. Finally, a modified damage assessment model was proposed and verified. It indicates that the HCFTST columns with reasonable design could display favorable performance and can be expected to have a widespread application in engineering structures.

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