Pre- and post-heating behavior of concrete-filled steel tube stub columns containing steel fiber and tire rubber

Structures ◽  
2020 ◽  
Vol 27 ◽  
pp. 2346-2364 ◽  
Author(s):  
Mahdi Nematzadeh ◽  
Amirhossein Karimi ◽  
Aliakbar Gholampour
Keyword(s):  
Steel Fiber ◽  
Steel Tube ◽  
Tire Rubber ◽  
Concrete Filled Steel Tube ◽  
Heating Behavior ◽  
Stub Columns

Shear response of steel fiber reinforced recycled concrete-filled steel tube columns

2021 ◽  
pp. 136943322110093
Author(s):  
Zhenzhen Liu ◽  
Yiyan Lu ◽  
Shan Li ◽  
Jiancong Liao
Keyword(s):  
Axial Compression ◽  
Steel Fiber ◽  
Steel Tube ◽  
Shear Capacity ◽  
Recycled Concrete ◽  
Recycled Aggregate ◽  
Superposition Method ◽  
Fiber Reinforced ◽  
Concrete Filled Steel Tube ◽  
Shear Span

A comprehensive study of the shear characteristics of steel fiber reinforced recycled concrete-filled steel tube (SRCFST) columns is conducted. 50 CFST stub columns are tested with the variables of steel tube diameter-thickness ratio ( D/t), shear span-to-depth ratio (λ), axial compression ratio ( n), and concrete mix. Two types of cements, three recycled aggregate percentages, three water-cement ratios, and three steel fiber contents are considered in design of concrete mixes. The experimental results show that SRCFST columns present the coincident shear behavior of the ordinary CFST columns. As λ is increased, shear resistance shows a downtrend, while the flexural strength presents an increasing trend. Imposing axial compression or thickening steel tube contributes to an adequate safety margin in plastic period. Based on the contributions superposition method, a predicted model of the shear capacity of SRCFST columns is proposed in consideration of shear-span ratio, axial compression, and self-stress.

scholarly journals Experimental and Numerical Study on the Compression Behavior of Square Concrete-Filled Steel Tube Stub Columns with Steel Fiber-Reinforced High-Strength Concrete

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Hyung-Suk Jung ◽  
Baek-Il Bae ◽  
Hyun-Ki Choi ◽  
Joo-Hong Chung ◽  
Chang-Sik Choi ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Yield Strength ◽  
Parametric Study ◽  
High Strength Concrete ◽  
High Performance ◽  
Steel Fiber ◽  
High Strength ◽  
Steel Tube ◽  
Stub Columns ◽  
Strain Increase

This study was conducted to evaluate the applicability of concrete-filled steel tube (CFT) columns made from high-performance construction materials. KBC2016, South Korea’s current building code, limits the maximum compressive strength of concrete at 70 MPa and the maximum yield strength of steel at 650 MPa. Similar restrictions to material properties are imposed on major composite structural design parameters in other countries worldwide. With the recent acceleration of the pace of development in the field of material technology, the compressive strength of commercial concrete has been greatly improved and the problem of low tensile strength, known to be the major limitation of concrete, is being successfully addressed by adding fiber reinforcement to concrete. Therefore, the focus of this study was to experimentally determine the strength and ductility enhancement effects, which depend on material composition. To this end, we performed concentric axial loading tests on CFT stub columns made from steel with a yield strength of 800 MPa and steel fiber-reinforced high-strength concrete. By measuring the strain at the yield point of CFT steel during the test, we could determine whether steel yields earlier than ultimate failure load of the member, which is a key design concept of composite structures. The analysis results revealed that the yield point of steel preceded that of concrete on the stress-strain curve by the concurrent action of the strain increase at the maximum strength, attributable to the high compressive strength and steel fiber reinforcement, and the strain increase induced by the confining stress of the steel tube. Additionally, we performed parametric study using ABAQUS to establish the broad applications of CFT using high-performance materials, with the width-to-thickness ratio as the main parameter. Parametric study was undertaken as experimental investigation was not feasible, and we reviewed the criteria for limiting the width-to-thickness ratio as specified in the current building code.

scholarly journals Study of Circular Reactive Powder Concrete-filled Steel Tube Stub Columns under Axial Compression

2018 ◽  
Vol 11 (5) ◽  
pp. 144-152
Author(s):  
Hua Luo ◽  
◽  
Weiwei Wang ◽  
Guanghui Wang ◽  
Bo Pang ◽  
...  
Keyword(s):  
Axial Compression ◽  
Steel Tube ◽  
Reactive Powder Concrete ◽  
Concrete Filled Steel Tube ◽  
Reactive Powder ◽  
Stub Columns

Behaviors of axially loaded circular concrete-filled steel tube (CFT) stub columns with notch in steel tubes

2013 ◽  
Vol 73 ◽  
pp. 273-280 ◽  
Author(s):  
Xu Chang ◽  
Lei Fu ◽  
Hong-Bo Zhao ◽  
Yong-Bin Zhang
Keyword(s):  
Steel Tube ◽  
Steel Tubes ◽  
Concrete Filled Steel Tube ◽  
Axially Loaded ◽  
Stub Columns
Sign in / Sign up

Export Citation Format

Share Document