5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

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


STUDY ON LOW-TEMPERATURE FATIGUE OF STEEL STRUCTURES AND FATIGUE PROPERTIES OF WELDS UNDER SHEARS STRESS

 

Yuanqing Wang 1*, Haoyang Gu 1, Xiaowei Liao 1, Liang Zong 2, Tianshen Zhang 1

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 Department of Civil Engineering, Tianjin University, Tianjin, China

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DOI:10.18057/ICASS2018.P.055

ABSTRACT:

China's new specification GB50017-2017 was revised according to Eurocode3. The fatigue-related provisions were further specified, but whether these provisions are suitable for China's situation is doubted. In addition, there has been controversy regarding the effect of low temperature on the fatigue properties of steel structures. In this paper we present our work on the fatigue performance of steel structure welds at low temperatures and under shear stress. Side welded details were tested under shear stress and the results were found to be in good agreement with curves given by the specification. But the results of front welded details indicated that the specification was conservative. Constant amplitude fatigue tests were performed on Q345qD and Q370qE base metal, welds, and structural details. It was found that the low temperature slightly improved fatigue performance of the base metal and welds. Results of structural details tended to be more discrete, in which case residual stresses may play a controlling role. In addition, studies show that the low temperature will reduce the fatigue crack propagation rate of the base metal but will accelerate that of the welds.

Keywords:

Fatigue under shear stress; Low-temperature fatigue; Crack propagation rate; Weld; Structural detail

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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