5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

Ninth International Conference on Advances in Steel Structures (ICASS 2018)


MECHANICAL PROPERTY AND CONSTITUTIVE MODELING OF LOW YIELD POINT STEELS

 

Yang GAO 1*, Gang SHI 1, Xun WANG 2 and Yong ZHANG 3

1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing, China

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2 East China Architectural Design & Research Institute Co., Ltd, Shanghai, China

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3 School of Civil Engineering, Beijing JiaoTong University, Beijing, China

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DOI:10.18057/ICASS2018.P.037

ABSTRACT:

Equipped with many advantages, such as low yield point, low yield-to-ultimate strength ratio, good ductility, and excellent energy dissipation capacity, low yield point (LYP) steels have been developed and adopted as new high performance structural steels in seismic application. This paper presents the research works on the mechanical properties and constitutive models of LYP steels fabricated in China, namely LY100, LY160, and LY225. Axial steel coupons machined from LYP steels were tested experimentally under monotonic and different cyclic loading patterns. In order to comprehensively describe the possible loading conditions in engineering application, 12 different cyclic loading patterns have been elaborately designed to investigate the material cyclic responses. Through test results, the monotonic and hysteretic properties were analyzed. Then, the material parameters for LYP steels of two constitutive models (the Chaboche model and the Hu et al. model) were calibrated based on the experimental data. Those two constitutive models were then implemented in the general purpose finite element software Abaqus. The accuracy and applicability of those two constitutive models were verified by comparing the test results and simulations. Finally, a comparative analysis was performed between those two models. The results show that LYP steel is a promising structural material for seismic design and also provide the findings of its material properties and simulation method.

Keywords:

Low yield point steel; Mechanical property; Constitutive model

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IMPORTANT DATES

First call for paper:
1 January 2018
Abstract submission: (CLOSED)
1 April 2018
Notification of abstract acceptance:
on or before 16 April 2018 
Full paper submission: 
15 July 2018
Online Registration Begins:
1 August 2018
Notification of full paper acceptance:
31 August 2018
Early bird registration:
on or before 7 September 2018
Online Registration Closes:
31 October 2018
Announcement of programme:
1 November 2018
ICASS2018 December 05, 2018 08:00 AM