STRUCTURAL PERFORMANCE AND AXIAL LOAD LIMIT OF CONCRETE FILLED STEEL SQUARE TUBULAR COLUMNS

Abstract: 7 square steel tubular columns were tested to discuss the ultimate axial bearing capacity, ductility performance and the steel consumption under stiffened by steel belts and binding bars of different cross-sections. Test results indicate that only by increasing fewer amounts of steel usage, stiffened square CFST columns with binding bars can not only improve the overall effects of restraint and alleviate regional local buckling between the binding bars, but also improve the bearing capacity of concrete filled square steel tubular columns. The utility benefits and the economical benefit is considerable, deserving extensive use.

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Experimental research on square steel tubular columns filled with steel-reinforced self-consolidating high-strength concrete under axial load

Engineering Structures ◽

10.1016/j.engstruct.2010.04.002 ◽

2010 ◽

Vol 32 (8) ◽

pp. 2278-2286 ◽

Cited By ~ 41

Author(s):

Meichun Zhu ◽

Jianxin Liu ◽

Qingxiang Wang ◽

Xiufeng Feng

Keyword(s):

Experimental Research ◽

High Strength Concrete ◽

Axial Load ◽

High Strength ◽

Strength Concrete ◽

Tubular Columns

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A Study on the Structural Performance of New Shape Built-up Square Column under Concentric Axial Load

Proceedings of the 10th International Conference on Advances in Steel Concrete Composite and Hybrid Structures ◽

10.3850/978-981-07-2615-7_237 ◽

2012 ◽

Author(s):

Sun-Hee Kim ◽

Sung-Mo Choi ◽

Kyong-Soo Yom

Keyword(s):

Axial Load ◽

Structural Performance

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STRUCTURAL PERFORMANCE OF DAMAGED OPEN-WEB TYPE SRC BEAM-COLUMNS WITH BOLT-CONNECTED BATTEN STEEL PLATES AFTER RETROFITTING

Proceedings of International Structural Engineering and Construction ◽

10.14455/isec.res.2015.112 ◽

2015 ◽

Vol 2 (1) ◽

Author(s):

Takahiro Kume ◽

Takashi Fujinaga ◽

Yuping Sun

Keyword(s):

Axial Load ◽

Steel Plates ◽

Analytical Models ◽

Structural Performance ◽

Test Results ◽

Beam Columns ◽

Cyclic Lateral Load ◽

Load Carrying ◽

Lower Load ◽

Constant Axial Load

In this paper, structural performance of damaged SRC beam-columns with open-web type of batten steel plate after retrofitting was investigated. Three open-web type SRC beam-columns with bolt-connected batten steel plates were fabricated and tested under combined constant axial load and cyclic lateral load. At first, each beam-column was　cyclically loaded to the targeted displacement. After the first loading, the test columns were retrofitted and reloaded till large deformation or failure. The damaged portion of each column was retrofitted with the polymer cement mortar and epoxy resin was injected into the cracks. The measured stiffness of retrofitted columns varied between 71.4% and 85.5% of the initial one. And, test results also indicated that the column which experienced the larger displacement and higher axial load showed lower load carrying capacity, but the others showed approximately the same capacities as the initial columns. Numerical analysis was also conducted to explain the retrofitted columns. Analytical results predicted the experimental behavior fairly well, which verifies the validity of the analytical models in low axial load.

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The Structural Performance of Precast Lightweight Foam Concrete Sandwich Panel with Single and Double Shear Truss Connectors Subjected to Axial Load

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.634-638.2746 ◽

2013 ◽

Vol 634-638 ◽

pp. 2746-2751 ◽

Cited By ~ 8

Author(s):

Noridah Mohamad ◽

Najmuddin Hassan

Keyword(s):

Construction Industry ◽

Axial Load ◽

Sandwich Panel ◽

Structural Performance ◽

Foam Concrete ◽

Shear Connectors ◽

Double Shear ◽

Steel Bar ◽

Strength Capacity ◽

Lightweight Foam

The progressive research upon the issue on renewal technology that can improve the construction industry has initiated the study of Precast Lightweight Foam Concrete Sandwich Panel (PLFP) as an alternative to Industrialize Building System (IBS). This paper reports the analysis of structural behavior of PLFP with double shear connectors under axial load. The PLFP panel consists of two wythes which enclosed a layer of polystyrene layer. Six (6 mm) rebar was used as the vertical and horizontal reinforcement and 9 mm steel bar bent at 450 was used as the connector. Full scaled panel was tested under axial load till failure. It was found that PLFP panel with double shear truss connector has higher ultimate strength capacity compared to PLFP with single shear connectors ehen tested under axial load.

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Overview of Research Progress for Concrete-Filled Steel Tubular Columns after Exposure to Fire

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.638-640.197 ◽

2014 ◽

Vol 638-640 ◽

pp. 197-201

Author(s):

Yan Chong Pan ◽

Guo Hui Wang ◽

Kai Xiang

Keyword(s):

Mechanical Properties ◽

Residual Strength ◽

Fire Safety ◽

Axial Load ◽

Research Progress ◽

Building Structures ◽

Fire Exposure ◽

Tubular Columns ◽

Cfst Columns ◽

Exposure Process

Fire safety is one of the most important performances index to evaluate building structures. The property of building members after exposure to fire involved with the safety of buildings after fire, and it will be necessary to estimate the post-fire residual strength of the structure in order to decide the appropriate strategy for repair. This paper summarizes the research progress of concrete-filled steel tubular (CFST) columns. Basic mechanical properties of conventional CFST columns after exposure to fire, CFST columns after the whole fire exposure process under sustained axial load, and CFST columns with special forms after exposure to fire are discussed.

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