Cyclic stress-strain behavior of structural steel with yield-strength up to 460 N/mm<sup>2</sup>

doi:10.1007/s11709-014-0245-y

Front. Struct. Civ. Eng.

2014, Vol. 8

Issue (2) : 178-186 https://doi.org/10.1007/s11709-014-0245-y

RESEARCH ARTICLE

Cyclic stress-strain behavior of structural steel with yield-strength up to 460 N/mm²

Yiyi CHEN¹,Wei SUN²,Tak-Ming CHAN^3,^*(

)

1. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
2. Architecture Design & Research Institute of Tongji University (Group) Co. Ltd., Shanghai 200092, China
3. School of Engineering, University of Warwick, Coventry CV4 7AL, UK

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Abstract

This paper presents a constitutive model based on Ramberg-Osgood equation to describe the hysteresis material behavior of structural carbon steel with nominal yield strength between 235 to 420 N/mm². The proposed model was calibrated against a series of cyclic material tests with strain amplitude varying from 0.5% to 2.0%. A simple relationship between the modular parameter K and the yield strength f_y was proposed. The calibrated Ramberg-Osgood model revealed excellent agreement with the experimental results and captured further the experimental behavior of test specimens with nominal yield strength of 460 N/mm². The proposed constitutive model was also adopted in conjunction with the combined kinematic/isotropic materials description in ABAQUS to mimic a full scale experimental test under cyclic loading. The numerical results revealed close agreement with the experimental observations.

Keywords constitutive model finite element analysis hysteresis curve Ramberg-Osgood equation

Corresponding Author(s): Tak-Ming CHAN

Issue Date: 19 May 2014

Cite this article:

Yiyi CHEN,Wei SUN,Tak-Ming CHAN. Cyclic stress-strain behavior of structural steel with yield-strength up to 460 N/mm²[J]. Front. Struct. Civ. Eng., 2014, 8(2): 178-186.

URL:

https://academic.hep.com.cn/fsce/EN/10.1007/s11709-014-0245-y
https://academic.hep.com.cn/fsce/EN/Y2014/V8/I2/178

Tab.1 Mean measured dimensions and key results from direct tensile tests

Fig.1 Cyclic loading protocols. (a) Cyclic ascend; (b) cyclic alternate; (c) cyclic tensile

Tab.2 Group 1 specimens Ramberg-Osgood parameters

Tab.3 Group 2 specimens Ramberg-Osgood parameters

Tab.4 Group 3 specimens Ramberg-Osgood parameters

Tab.5 Group 4 specimens Ramberg-Osgood parameters

Tab.6 Group 5 specimens Ramberg-Osgood parameters

Tab.7 Group 6 specimens Ramberg-Osgood parameters

Tab.8 Group 7 specimens Ramberg-Osgood parameters

Fig.2 Hysteresis loops for Group 1 specimens. (a) Cyclic Ascend (1-1); (b) cyclic alternate (1-2)

Tab.9 Modular parameters for hysteresis loops

Tab.10 Modular parameter and yield strength relation

Fig.3 Hysteresis loops for Group 1 specimen under cyclic ascend loading protocol

Fig.4 Hysteresis loops for Group 1 specimen under cyclic alternate loading protocol

Fig.5 The effect of loading protocols on hysteresis loops

Fig.6 Hysteresis loops for Group 8 specimen under cyclic ascend loading protocol

Fig.7 Hysteresis loops for Group 9 specimen under cyclic ascend loading protocol

Fig.8 Specimen dimension (in mm)

Fig.9 Loading protocol

Fig.10 Finite element model

Fig.11 Hysteresis loops.

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