Performance Of UPHC Filled Steel Column

Structural Member ◽

Steel Tubes ◽

Project Report ◽

Steel Column ◽

Steel Sections ◽

Super Frame ◽

Better Than

Ever since the development of the Ultra-High-Performance Concrete [UHPC], research has been going on in the use of hollow steel tubes filled with UHPC as a super-frame structural member. The key area of this research is to study the influence of confinement effect on the behavior of the Super-frame column and to develop guidelines in modern codes for the design of such composite sections. This project report compares the performance UHPC filled steel tubes and conventional sections using a computer program, Lab experiment and analytical analysis. The results of all the analysis show that UHPC filled tubes perform better than the conventional sections such as only steel sections or concrete sections. Additionally, Eurocode - 4 predicts reasonable results.

UHPC Infilled Circular steel Tube Column Design

10.32920/ryerson.14656038 ◽

2021 ◽

Author(s):

Youssef Hilal

Keyword(s):

Cross Section ◽

High Performance ◽

Steel Tube ◽

Design Code ◽

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.

Blast Analysis on In-Filled Steel Tube Columns

International Journal for Modern Trends in Science and Technology - RTT2020 ◽

10.46501/ijmtst060612 ◽

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 ◽

Steel Tube ◽

Blast Load ◽

Ansys Software ◽

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.

Axial compression behaviours of ultra-high performance concrete-filled Q690 high-strength steel tubes at low temperatures

Thin-Walled Structures ◽

10.1016/j.tws.2021.108419 ◽

2021 ◽

Vol 169 ◽

pp. 108419

Author(s):

Jia-Bao Yan ◽

Xinyan Yang ◽

Yanli Luo ◽

Peng Xie ◽

Yun-Biao Luo

Keyword(s):

Axial Compression ◽

Low Temperatures ◽

High Strength Steel ◽

High Performance ◽

High Strength ◽

Steel Tubes

The Influences of Iron Ore Tailings as Fine Aggregate on the Strength of Ultra-High Performance Concrete

Advances in Materials Science and Engineering ◽

10.1155/2015/412878 ◽

2015 ◽

Vol 2015 ◽

pp. 1-6 ◽

Cited By ~ 8

Author(s):

Zhigang Zhu ◽

Beixing Li ◽

Mingkai Zhou

Keyword(s):

Particle Size ◽

Frost Resistance ◽

High Performance ◽

Iron Ore ◽

Fine Aggregate ◽

Iron Ore Tailings ◽

Better Than

The present study looks for the feasibility of preparing UHPC with iron ore tailings (IOT for short) as fine aggregate. To enhance outstanding high performances, some influences on UHPC mortars were investigated such as different kinds of sands, different mix ratio of sands, and different largest particle size of fine aggregate. The results show that IOT have negligible poorer aggregate performance than silica sands but better than river sands. The strength of UHPC reaches the highest point when silica sands were instead 60% by IOT. As the largest particle size of fine aggregate is decreasing, the strength and frost resistance of UHPC were improved, but the liquidity was decreased. Micropowder of IOT affects the strength and the optimal content was 4%.

Experimental study on concrete filled steel tubes to footing connection using ultra-high performance concrete

Engineering Structures ◽

10.1016/j.engstruct.2021.112540 ◽

2021 ◽

Vol 242 ◽

pp. 112540

Author(s):

Sheharyar Rehmat ◽

Amir Sadeghnejad ◽

Islam M. Mantawy ◽

Atorod Azizinamini

Keyword(s):

Experimental Study ◽

High Performance ◽

Steel Tubes ◽

Concrete Filled Steel Tubes

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

Materials ◽

10.3390/ma14216354 ◽

2021 ◽

Vol 14 (21) ◽

pp. 6354

Author(s):

Fanghong Wu ◽

Yanqin Zeng ◽

Ben Li ◽

Xuetao Lyu

Keyword(s):

Experimental Investigation ◽

High Performance ◽

Coarse Aggregate ◽

Steel Tube ◽

Flexural Behavior ◽

Flexural Stiffness ◽

Flexural Capacity ◽

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.

UHPC Infilled Circular steel Tube Column Design

10.32920/ryerson.14656038.v1 ◽

2021 ◽

Author(s):

Youssef Hilal

Keyword(s):

Cross Section ◽

High Performance ◽

Steel Tube ◽

Design Code ◽

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.