Experimental and Numerical Investigations of PVC-FRP Confined Concrete Column-RC Beam Joint Reinforced with Core Steel Tube under Axial Load

2021 ◽  
Author(s):  
Feng Yu ◽  
Yucong Guan ◽  
Yuan Fang ◽  
Dongang Li
Keyword(s):  
Axial Load ◽  
Steel Tube ◽  
Confined Concrete ◽  
Concrete Column ◽  
Rc Beam ◽  
Numerical Investigations

Experimental behaviour of thin-walled steel tube confined concrete column to RC beam joints under cyclic loading

2009 ◽  
Vol 47 (8-9) ◽  
pp. 847-857 ◽  
Author(s):  
Lin-Hai Han ◽  
Hui Qu ◽  
Zhong Tao ◽  
Zai-Feng Wang
Keyword(s):  
Cyclic Loading ◽  
Steel Tube ◽  
Confined Concrete ◽  
Concrete Column ◽  
Rc Beam ◽  
Thin Walled ◽  
Experimental Behaviour

Mechanical Behavior Study on Connections of Multibarrel Tube-Confined Concrete Column with Steel Beam

2012 ◽  
Vol 166-169 ◽  
pp. 3269-3272
Author(s):  
Li Ying Xu
Keyword(s):  
Mechanical Behavior ◽  
Seismic Design ◽  
Seismic Behavior ◽  
Ultimate Load ◽  
Steel Tube ◽  
Confined Concrete ◽  
Steel Beam ◽  
Concrete Column ◽  
Good Ductility ◽  
Behavior Study

In order to meet the necessity of the code for seismic design of buildings: Principle for strong connections and feebleness member. The exernal steel tube of column and steel beam are joining with three kinds of style. Containing two strengthen styles T-style stiffening plate and appending haunch. The result reveals that the two strengthen connections ultimate load are much bigger, good ductility, better seismic behavior. The deformation of the column and the region of the connection is smaller when it was broken, Indicating the connections’s globality is better and the stiffness is bigger. It avoids brittleness for breaking styles when they are given more load.

Compressive behavior of concrete-filled steel tubular columns with internal high-strength steel spiral confinement

2020 ◽  
pp. 136943322098165
Author(s):  
J.G. Teng ◽  
J.J. Wang ◽  
Guan Lin ◽  
J. Zhang ◽  
P. Feng
Keyword(s):  
Axial Compression ◽  
High Strength Steel ◽  
Axial Load ◽  
Axial Strain ◽  
High Strength ◽  
Concrete Columns ◽  
Steel Tube ◽  
Confined Concrete ◽  
Experimental Program ◽  
Cfst Columns

Concrete-filled steel tubular (CFST) columns have been extensively studied and widely used in practice. Existing research has shown that non-circular CFST columns is much less ductile than their circular counterparts, particularly when thin/high strength steel (HSS) tubes and high-strength concrete are used. To address this problem, a new form of CFST columns has recently been proposed by the first author. The new column consists of a steel tube filled with concrete that is confined with HSS spiral reinforcement typically with a yield stress exceeding 1000 MPa. These columns, referred to as confined concrete-filled steel tubular (CCFST) columns, also maintain the ease for connection to CFST or steel beams. This paper presents the results of a series of concentric axial compression tests on such columns of square cross-section to demonstrate their advantages. The experimental program included 13 CCFST columns, four CFST columns without internal spiral confinement, two hollow steel tube (HST) columns, and 11 circular HSS spiral-confined concrete columns. Three different compressive strengths and three HSS spiral pitches were examined in the experimental program. The CFST columns, HST columns, and HSS spiral-confined concrete columns were all tested under axial compression to gain a good understanding of the confinement mechanism in a CCFST column. The test results show that the new columns possess much greater ductility than those without internal spiral confinement, although the use of HSS spirals increases the steel volume by only a small percentage. It is also shown that the axial load-axial strain curve of a CCFST column can be conservatively predicted by summing the axial load-axial strain curves of the hollow steel tube without local buckling, the HSS spiral-confined concrete core, and the sandwiched concrete between the two.

scholarly journals Axial Load Behavior of Ultrahigh Strength Concrete-Filled Steel Tube Columns of Various Geometric and Reinforcement Configurations

2021 ◽  
Vol 6 (5) ◽  
pp. 66
Author(s):  
Khandaker M. A. Hossain ◽  
Katie Chu ◽  
Muhammed S. Anwar
Keyword(s):  
Axial Load ◽  
Concrete Strength ◽  
Steel Tube ◽  
Confined Concrete ◽  
Analytical Models ◽  
Concrete Filled Steel Tube ◽  
Axial Strength ◽  
Strength Concrete ◽  
Ultrahigh Strength ◽  
Cfst Columns

This paper presents the behavior of concrete-filled steel tube (CFST) columns infilled with fiber-reinforced self-consolidating ultrahigh strength concrete (UHSC) subjected to axial concentric monotonic loading to failure. UHSC is expected to improve ease of fabrication, strength, and ductility of CFST columns. Seventeen columns having varying geometric properties such as tube wall thickness, cross-sectional shape (circular, rectangular, and square), and slenderness were constructed and tested by applying load through both steel tube and concrete core. Circular columns were further distinguished by the presence or absence of main and hoop steel reinforcing bars in the core concrete. Axial load-displacement response, axial/transverse strain development, and failure modes were recorded during the loading history to analyze the performance. Experimental confined concrete strength and axial strength of UHSC-filled CFST columns were compared with those obtained from three suggested analytical models and three code-based design procedures including Eurocode 4, Canadian CAN/CSA S16, and American AISC. Analytical models were found to over-predict the confined concrete strength and the axial strength of CFST columns. Canadian and American codes were found to be most applicable for predicting axial strength of UHSC-filled CFST columns while remaining conservative.

Coupled ultimate capacity of CFRP confined concrete-filled steel tube columns under compression-bending-torsion load

Structures ◽  
2021 ◽  
Vol 31 ◽  
pp. 558-575
Author(s):  
Yu-Hang Wang ◽  
Yu-Yan Wang ◽  
Xu-Hong Zhou ◽  
Ran Deng ◽  
Yong-Sen Lan ◽  
...  
Keyword(s):  
Steel Tube ◽  
Confined Concrete ◽  
Ultimate Capacity ◽  
Concrete Filled Steel Tube
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