Abstract

The stress-strain properties of reinforcing steel for reinforced concrete are related to the design of reinforced concrete structures. In China Codes, steel bars for the prestressing of concrete (PCB) and hot-rolled ribbed bars in grade 600 (HRB600) were introduced to design concrete structures. However, the stress-strain properties of high-strength steel bars are not defined by the standard. In this paper, reinforcing steel for reinforced concrete in a China Code included hot-rolled plain bars (HPB), HRB, cold-rolled ribbed steel bars (CRB), PCB, hot-rolled wire rod for prestressed steel (PSW), and screw-thread steel bars for the prestressing of concrete (PSB), which were tested under axial tension. Results showed that the reinforcing steel was divided into two types: HPB, HRB, and CRB600H with yield plateau and PCB, PSW, PSB, and CRB550 without. Based on the experimental results, the tensile mechanical indicators of reinforcing steel were determined and the stress-strain curves prediction models of reinforcing steel were developed. The stress-strain curves prediction models of steel bars can predict the tensile properties of steel bars accurately, which can be used in finite element software to simulate the tensile properties of steel bars and explore the stress development of steel bars in concrete structures.

Issue Section:
Technical Papers
Keywords:
reinforcing steel, mechanical indicators, stress-strain relationships, prediction models

References

1.
Steel for the Reinforcement of Concrete—Part 2: Hot Rolled Ribbed Bars
, GB/T 1499.2-2018 (
Beijing
:
Standardization Administration of China
,
2018
).
2.
Code for Design of Concrete Structures
, GB 50010-2010 (
Beijing
:
Standardization Administration of China
,
2010
).
3.
Fan
 
Z.
,
Xu
 
L.
,
Feng
 
Y.
, and
Wu
 
S.
, “
Discussion on the Application of High-Strength Reinforcement
,”
Structural Engineering
, no. 
6
(
2013
):
169
–
176
.
4.
Bai
 
L.-G.
 and
Liu
 
W.-Y.
, “
Research and Application of Concrete Structures with Super-High Strength Steel Bars
,”
Building Structure
, no. 12 (
2016
):
49
–
53
.
5.
China Architecture and Building Press
Technical Guidelines for Application of High-Strength Hot Rolled Ribbed Bars in Concrete Structure, Standard Rating Institute of the Ministry of Housing and Urban-Rural Construction
(
Beijing
:
China Architecture and Building Press
,
2010
).
6.
Eurocode 2: Design of Concrete Structures. General Rules and Rules for Buildings
, BS EN 1992-1-1:2004 (
London
:
British Standards Institution
,
2004
).
7.
Building Code Requirements for Structural Concrete
, ACI 318-14 (
Farmington Hills, MI
:
American Concrete Institute
,
2014
).
8.
Design Code
, CEB-FIP Model Code 2010 (
Lausanne, Switzerland
:
Fédération internationale du béton
,
2016
).
9.
Gu
 
X.-L.
,
Jin
 
X.
, and
Zhou
 
Y.
,
Basic Principles of Concrete Structures
(
Berlin, Germany
:
Springer
,
2016
).
Google Scholar
Crossref
Search ADS
 
10.
Wang
 
Y.
,
Zhang
 
Z.
,
Zheng
 
W.-Z.
,
Zhu
 
A.
, and
Zhao
 
J.
, “
Mechanical Behavior of Concrete Columns Confined by Steel Bar for Prestressed Concrete Spiral Hoops
” (in Chinese),
Journal of Harbin Institute of Technology
 
45
, no. 
4
(
2013
):
6
–
13
.
11.
Zheng
 
W.-Z.
,
Lv
 
X.-Y.
,
Wang
 
Y.
,
Gu
 
Y.
, and
Du
 
J.
, “
Flexural Behaviour of Slabs Reinforced with Cold-Rolled Ribbed Welded Steel Fabric
,”
Journal of Harbin Institute of Technology
, no. 
6
(
2016
):
75
–
80
.
12.
Shen
 
P. S.
,
Structural Design and Construction of Cold-Rolled Ribbed Steel Reinforced Concrete
(
Beijing
:
China Building Industry Press
,
1997
).
13.
Lin
 
F.
,
Dong
 
Y.
,
Kuang
 
X.
, and
Lu
 
L.
, “
Strain Rate Behavior in Tension of Reinforcing Steels HPB235, HRB335, HRB400, and HRB500
,”
Materials
 
9
, no. 
12
(
2016
): E1013, https://doi.org/10.3390/ma9121013
14.
Liu
 
M.-Z.
, “
Study on Constitutive Model of Concrete Specimens Confined with HPB300 “Thin” Stirrups under Axial Compression
,” (master’s thesis,
Nanchang University
,
2017
).
15.
Zhang
 
H.-Y.
 and
Zheng
 
W.-Z.
, “
Mechanical Property of Steel Strand at High Temperature
,”
Journal of Harbin Institute of Technology
 
39
, no. 
6
(
2007
):
861
–
865
.
16.
Steel for the Reinforcement of Concrete—Part 1: Hot Rolled Plain Bars
, GB/T 1499.1-2008 (
Beijing
:
Standardization Administration of China
,
2008
).
17.
Cold Rolled Ribbed Steel Bars
, GB/T 13788-2017 (
Beijing
:
Standardization Administration of China
,
2017
).
18.
Steel Bars for the Prestressing of Concrete
, GB/T 5223.3-2017 (
Beijing
:
Standardization Administration of China
,
2017
).
19.
Screw-Thread Steel Bars for the Prestressing of Concrete
, GB/T 20065-2016 (
Beijing
:
Standardization Administration of China
,
2016
).
20.
Radnic
 
J.
,
Markic
 
R.
,
Harapin
 
A.
,
Matesan
 
D.
, and
Baloevic
 
G.
, “
Stirrup Effects on Compressive Strength and Ductility of Confined Concrete Columns
,”
World Journal of Engineering
 
10
, no. 
6
(
2014
):
497
–
506
, https://doi.org/10.1260/1708-5284.10.6.497
Google Scholar
Crossref
Search ADS
 
21.
Cascardi
 
A.
,
Micelli
 
F.
, and
Aiello
 
M. A.
, “
An Artificial Neural Networks Model for the Prediction of the Compressive Strength of FRP-Confined Concrete Circular Columns
,”
Engineering Structures
 
140
(June
2017
):
199
–
208
, https://doi.org/10.1016/j.engstruct.2017.02.047
Google Scholar
Crossref
Search ADS
 
22.
Sarıdemir
 
M.
, “
Predicting the Compressive Strength of Mortars Containing Metakaolin by Artificial Neural Networks and Fuzzy Logic
,”
Advances in Engineering Software
 
40
, no. 
9
(September
2009
):
920
–
927
, https://doi.org/10.1016/j.advengsoft.2008.12.008
Google Scholar
Crossref
Search ADS
 
This content is only available via PDF.
All rights reserved. This material may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of ASTM International.
You do not currently have access to this content.