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

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

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.

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.

Experimental study on the cyclic behavior of ultra high performance concrete–filled steel tube beam-columns

2019 ◽  
Vol 23 (5) ◽  
pp. 969-978
Author(s):  
Jian-gang Wei ◽  
Jun Zhou ◽  
Jiang-nan Huang ◽  
Hui-hui Yuan ◽  
Qing-wei Huang
Keyword(s):  
Axial Load ◽  
High Performance ◽  
High Performance Concrete ◽  
Load Ratio ◽  
Steel Tube ◽  
Cyclic Behavior ◽  
Ultra High Performance Concrete ◽  
Concrete Filled Steel Tube ◽  
Beam Columns ◽  
Axial Load Ratio

This article experimentally investigates the cyclic behavior of ultra high performance concrete–filled steel tube beam-columns. A total of eight specimens were tested. The considered parameters were the axial load ratio and steel ratio. The results showed that all ultra high performance concrete–filled steel tube beam-columns had a very good cyclic behavior without significant pinching. Increasing the axial load ratio results in the decrease of strength and ductility, but it has no obvious influence on the initial flexural stiffness. Reducing the steel ratio results in the decrease of the strength, stiffness and ductility, and energy dissipation capacity.

scholarly journals Experimental Investigation of Flexural Behavior of Ultra-High-Performance Concrete with Coarse Aggregate-Filled Steel Tubes

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6354
Author(s):  
Fanghong Wu ◽  
Yanqin Zeng ◽  
Ben Li ◽  
Xuetao Lyu
Keyword(s):  
Experimental Investigation ◽  
High Performance ◽  
Coarse Aggregate ◽  
High Performance Concrete ◽  
Steel Tube ◽  
Flexural Behavior ◽  
Flexural Stiffness ◽  
Flexural Capacity ◽  
Ultra High Performance Concrete ◽  
Steel Tubes

This paper presents an experimental investigation of flexural behavior of circular ultra-high-performance concrete with coarse aggregate (CA-UHPC)-filled steel tubes (CA-UHPCFSTs). A total of seven flexural members were tested under a four-point bending load. The failure modes, overall deflection curves, moment-versus-curvature relationships, moment-versus-strain curves, strain distribution curves, ductility, flexural stiffness and ultimate flexural capacity were evaluated. The results indicate that the CA-UHPCFSTs under bending behaved in a good ductile manner. The CA-UHPC strength has a limited effect on the ultimate flexural capacity, while the addition of steel fiber can improve the ultimate flexural capacity. Increasing the steel tube thickness leads to higher flexural stiffness and ultimate flexural capacity. There is a significant confinement effect between the steel tube and the CA-UHPC core in the compressive zone and centroidal plane after the specimen enters the elastic-plastic stage, while the confinement effect in the tensile zone is minimal. Moreover, the measured flexural stiffness and ultimate flexural capacity were compared with the predictions using various design specifications. Two empirical formulas for calculating the initial and serviceability-level flexural stiffness of CA-UHPCFSTs are developed. Further research is required to propose the accurate design formula for the ultimate flexural capacity of CA-UHPCFSTs.

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.

Sign in / Sign up

Export Citation Format

Share Document