Experimental investigation on concrete-filled corrugated steel tubular column under constant axial load and cyclic load

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 investigation of damaged square short RC columns with low slenderness retrofitted by CFRP strips under axial load

Structures ◽

10.1016/j.istruc.2020.08.068 ◽

2020 ◽

Vol 28 ◽

pp. 170-180 ◽

Cited By ~ 1

Author(s):

Rahim Ghoroubi ◽

Ömer Mercimek ◽

Anıl Özdemir ◽

Özgür Anil

Keyword(s):

Experimental Investigation ◽

Axial Load ◽

Rc Columns

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Experimental Behavior of Nonconforming RC Columns with Plain Bars under Constant Axial Load and Biaxial Bending

Journal of Structural Engineering ◽

10.1061/(asce)st.1943-541x.0000703 ◽

2013 ◽

Vol 139 (6) ◽

pp. 897-914 ◽

Cited By ~ 25

Author(s):

M. Di Ludovico ◽

G. M. Verderame ◽

A. Prota ◽

G. Manfredi ◽

E. Cosenza

Keyword(s):

Axial Load ◽

Biaxial Bending ◽

Rc Columns ◽

Experimental Behavior ◽

Plain Bars ◽

Constant Axial Load

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Seismic Evaluation of Existing Reinforced Concrete Building Columns

Earthquake Spectra ◽

10.1193/1.1585907 ◽

1996 ◽

Vol 12 (4) ◽

pp. 715-739 ◽

Cited By ~ 94

Author(s):

Abraham C. Lynn ◽

Jack P. Moehle ◽

Stephen A. Mahin ◽

William T. Holmes

Keyword(s):

Reinforced Concrete ◽

Axial Load ◽

Lateral Displacement ◽

Concrete Columns ◽

Vertical Load ◽

Seismic Evaluation ◽

Severe Damage ◽

Reinforced Concrete Columns ◽

Concrete Building ◽

Constant Axial Load

Past earthquakes have emphasized the vulnerability of reinforced concrete columns having details typical of those built before the mid-1970's. These columns are susceptible to axial-flexural, shear, and bond failures, which subsequently may lead to severe damage or collapse of the building. Research was undertaken to investigate the lateral and vertical load-resisting behavior of reinforced concrete columns typical of pre-1970's construction. Eight full-scale specimens were constructed and were loaded with constant axial load and increasing cyclic lateral displacement increments until failure. Test data are presented and compared with behavior estimated by using various evaluation methods.

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Towards an understanding of the loosening characteristics of prevailing torque nuts

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1243/09544062jmes1493 ◽

2010 ◽

Vol 224 (2) ◽

pp. 483-495 ◽

Cited By ~ 13

Author(s):

W Eccles ◽

I Sherrington ◽

R D Arnell

Keyword(s):

Axial Load ◽

Axial Loading ◽

Transverse Displacement ◽

Test Machine ◽

Transverse Joint ◽

Metal Type ◽

Prevailing Torque ◽

Transverse Movement ◽

Complete Detachment ◽

Constant Axial Load

Prevailing torque nuts are an extremely popular method of providing resistance to vibration-induced self-loosening of fasteners. Such nuts have a self-contained prevailing torque feature that provides a degree of resistance to rotation. Although such nuts are frequently used, it is not widely realized that they can occasionally come completely detached from bolts. The mechanism by which this can occur has hitherto been unidentified since it has not been possible to replicate detachment under laboratory testing. This article identifies a general condition that can result in the complete loosening and detachment of prevailing torque type nuts. This mechanism involves the application of an axial load when transverse joint slip is occurring. This article describes a modified Junker test machine that allows the application of axial loading to a joint while experiencing transverse displacement. Tests have been completed using an intermittent as well as a constant axial load. Loading in both modes has been demonstrated to result in the complete detachment of this nut type. Based on this investigation, if the magnitude of the axial loading exceeds the residual preload in the bolt retained from sustaining transverse movement alone, the all-metal type of prevailing torque nut can completely detach. Applications that involve shear and axial loading being simultaneously applied to a joint are numerous in engineering.

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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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Quasi-Static Cyclic Tests on Masonry Spandrels

Earthquake Spectra ◽

10.1193/1.4000063 ◽

2012 ◽

Vol 28 (3) ◽

pp. 907-929 ◽

Cited By ~ 44

Author(s):

Katrin Beyer ◽

Alessandro Dazio

Keyword(s):

Cyclic Loading ◽

Mechanical Model ◽

Axial Load ◽

Failure Mechanisms ◽

Cyclic Tests ◽

Masonry Arch ◽

Test Setup ◽

Experimental Campaign ◽

Constant Axial Load ◽

Deformation Hysteresis

This paper presents the results of an experimental campaign on masonry spandrels. Within this campaign, four masonry spandrels were subjected to quasi-static cyclic loading. Two different spandrel configurations were tested. The first configuration comprised a masonry spandrel with a timber lintel, and the second configuration, a masonry spandrel on a shallow masonry arch. For each configuration, two specimens were tested. The first was tested with a constant axial load in the spandrel, while for the second specimen, the axial load in the spandrel depended on the axial elongation of the spandrel. This paper summarizes the properties of the four test units, the test setup, and the most important results from the experiments, documenting the failure mechanisms that developed and the force-deformation hysteresis of the spandrel elements. The paper also presents a mechanical model for estimating the peak strength of masonry spandrels.

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