Eccentric behaviour of square CFST columns strengthened using square steel tube and high-performance concrete jackets

2022 ◽  
Vol 253 ◽  
pp. 113772
Author(s):  
Pengtuan Zhao ◽  
Yue Huang ◽  
Yiyan Lu ◽  
Hongjun Liang ◽  
Tao Zhu
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Steel Tube ◽  
Cfst Columns ◽  
Square Steel Tube

Expansive ultra-high performance concrete for concrete-filled steel tube applications

2020 ◽  
Vol 114 ◽  
pp. 103813
Author(s):  
Peiliang Shen ◽  
Jian-Xin Lu ◽  
Haibing Zheng ◽  
Linnu Lu ◽  
Fazhou Wang ◽  
...  
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Steel Tube ◽  
Ultra High Performance Concrete ◽  
Concrete Filled Steel Tube

Dynamic behavior of concrete filled steel tubular columns

2019 ◽  
Vol 10 (2) ◽  
pp. 244-264 ◽  
Author(s):  
Said Hicham Boukhalkhal ◽  
Abd Nacer Touati Ihaddoudène ◽  
Luis Filipe Da Costa Neves ◽  
Wafa Madi
Keyword(s):  
High Performance ◽  
Research Work ◽  
Steel Frames ◽  
Steel Structures ◽  
Steel Tube ◽  
Absorption Capacity ◽  
Resistant Steel ◽  
Content Type ◽  
Open Section ◽  
Cfst Columns

Purpose The purpose of this paper is to investigate the static and dynamic inelastic response of rigid and semi-rigid connections of steel structures with concrete-filled steel tube (CFST) columns built in high seismic areas, and to compare it with those with open section columns. Design/methodology/approach CFST columns are frequently used in moment resistant steel frames located in seismic areas due to their inherent advantages, including their ductility, energy absorption capacity as well as their high bearing capacity. The smart combination of steel and concrete makes it possible to benefit from the advantages of both components to the maximum. This research work presents the nonlinear dynamic response of moment resistant steel frames with CFST columns, with rigid or semi-rigid connections, built in high seismic areas, according to the Algerian seismic code RPA 99/2003, European EC8 and American FEMA 356 to show the nonlinear characteristics of this type of structures, and their advantages over steel frames with open section columns. Findings The paper presents the advantages of using CFST columns with rigid and semi-rigid connections on the seismic response of portal steel frames. A high performance level in terms of ductility, plastic hinges distribution and their order of appearance has been obtained. It also shows the low effect of seismic loading on the structural elements with CFST columns compared to structures with open section columns. Originality/value The investigation of the numerical results has shown the possibility of their use in the seismic areas for their adequate performance, and also with respect to the design limits specified in the seismic guidelines. In addition, this study represents a first step to develop seismic performance factors for steel structures with CFST columns in Algeria, where the Algerian code do not include a comprehensive specification for the composite steel structures.

scholarly journals UHPC Infilled Circular steel Tube Column Design

2021 ◽  
Author(s):  
Youssef Hilal
Keyword(s):  
Cross Section ◽  
High Performance ◽  
High Performance Concrete ◽  
Steel Tube ◽  
Design Code ◽  
Ultra High Performance Concrete ◽  
Steel Tubes ◽  
Design Strength ◽  
Circular Steel Tube ◽  
Column Design

Previous researchers studied the behavior of Ultra-High Performance Concrete (UHPC) columns confined with steel tubes. However, predicting the influence of the confinement effect and the compressive capacity of these columns has yet to be further examined. Currently, the Canadian design code limits for reinforced concrete do not reach the strength nor the strain produced by using UHPC. This project uses the Canadian design methods for a cross-section of UHPC to form a column interaction curve and compared it with six test specimens. The effects of steel tube confinement will also be examined. Additionally, the Eurocode 4 (EC4) method, which includes the strengths of UHPC and confinement of steel tube, was used to formulate another column interaction curve. The results show that the Canadian code severely underestimates the design strength of confined UHPC while the EC4 provides much more accurate results.

Test of High Performance Reinforced Concrete Beams with Web Openings Using Fly-Ash

2013 ◽  
Vol 368-370 ◽  
pp. 1118-1122 ◽  
Author(s):  
Seung Jo Lee
Keyword(s):  
Fly Ash ◽  
High Performance ◽  
Ultimate Load ◽  
Steel Tube ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Test Results ◽  
Web Openings ◽  
Square Steel Tube ◽  
Better Than

The purpose of this study is to evaluate the flexural behavior of RC beams with web openings (HPRWO) that are constructed by using square steel tube, fibers and fly-ash. One regular RC beam with openings (HPRS) and three HPRWO specimens were manufactured and tested under monotonic loading. It was evaluated by flexural experiment of HPRWO through comparison of failure mode, load-deflection curves, ductility and ultimate load (Vu). Test results showed that the ultimate load of the HPRFPS specimens were approximately 11.2% to 51.3% better than that of the HPRS, in addition their ductility behavior was better than the HPRS.

A novel analysis-oriented theoretical model for steel tube confined ultra-high performance concrete

2021 ◽  
Vol 264 ◽  
pp. 113713
Author(s):  
Qiuru Lu ◽  
Lihua Xu ◽  
Yin Chi ◽  
Fangqian Deng ◽  
Min Yu ◽  
...  
Keyword(s):  
Theoretical Model ◽  
High Performance ◽  
High Performance Concrete ◽  
Steel Tube ◽  
Ultra High Performance Concrete

scholarly journals Blast Analysis on In-Filled Steel Tube Columns

2020 ◽  
Vol 6 (6) ◽  
pp. 50-53
Author(s):  
Karthik N Ganiga ◽  
Ibrahim Mahzeen ◽  
Mohammed Safan ◽  
Shaikh Fazil M U ◽  
Shilpa S
Keyword(s):  
Construction Industry ◽  
High Performance ◽  
High Performance Concrete ◽  
Steel Tube ◽  
Blast Load ◽  
Ansys Software ◽  
Ultra High Performance Concrete ◽  
Steel Tubes ◽  
Permanent Formwork ◽  
Double Skin

In recent years, a large number of studies have been carried out to investigate the behaviours of concrete filled double skin steel tube (CFDST) members due to its increasing popularity in the construction industry. This project aims to study on ultra-high performance concrete filled double-skin tubes subjected to blast loading with cross section being square for both inner and outer steel tubes using ANSYS software. It is evident that the proposed CFDST column was able to withstand a large blast load without failure so that it has the potential to be used in high-value buildings as well as critical infrastructures. The steel tubes and concrete work together well and integrity of steel concrete interface is maintained. Steel tubes in inner and outer can acts as permanent formwork and primary reinforcement. ANSYS results shows that the CFDA column can withstand applied blast load.

scholarly journals Axial load behaviour of steel tube columns in-filled with various high performance concretes

2021 ◽  
Author(s):  
Katie Chu
Keyword(s):  
Axial Load ◽  
High Performance ◽  
Failure Modes ◽  
Lightweight Concrete ◽  
High Strength ◽  
Crumb Rubber ◽  
Steel Tube ◽  
Axial Strength ◽  
Coarse Aggregates ◽  
Cfst Columns

This research concentrates on the axial load behaviour of circular, square and rectangular concrete filled steel tube (CFST) columns incorporating high-performance self-consolidating concretes such as ultra-high strength concrete (UHSC), engineered cementitious composite (ECC), lightweight concrete (LWC), and crumb rubber concrete (CRC). Seventy-four CFST specimens with varying slenderness, shape, concrete type and presence of internal bar reinforcements are tested experimentally under axial compression loading. The effect of these variables on axial load-deformation response, strain characteristics, failure modes, concrete confinement and axial strength are evaluated through experimental results. Performance of existing analytical/code based models for axial strength and concrete confined strength is evaluated. Concretes without coarse aggregates including UHSC proved less effective at enhancing axial strength of filled tube columns through confinement. In contrast, confinement in filled steel tube columns was found most effective with the use of concretes with coarse aggregates such as LWC and CRC.

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