Paper Title:
Factors Affecting the Low Cycle Fatigue Behavior around the Weak Axis of Welded I-Section Bracing Members
  Abstract

The low cycle fatigue behavior and energy dissipation capacity around the weak axis of the welded I-section bracing members are investigated by 35 pinned-pinned bracing specimen tests under the axial cyclic loading with different characteristics. Particular attention is paid to the effects of loading amplitude, loading history and geometry properties of these members. It is found that the fatigue damage propagating to fracture in the flanges of the bracing members can be divided into 3 stages involving the macroscopic surface crack initiation, the penetrated crack formation and the penetrated crack propagation. Some empirical formulas to estimate the fatigue life and cyclic energy dissipation capacity of the bracing members are also presented based on the experimental data. The statistical analysis indicates that the fatigue life to surface crack initiation significantly depends on the inelastic local buckling and will increase with decreasing width-thickness ratio of the flanges and increasing slenderness ratios of the bracing members. Besides, it is found that the low cycle fatigue and energy dissipation of these members also depends on loading amplitude and loading history, and the effects of overloads and mean compression amplitude can improve the fatigue performance of bracing members. The test results show that the bracing members with better low-cycle fatigue resistance have the better energy dissipation capacities.

  Info
Periodical
Key Engineering Materials (Volumes 324-325)
Edited by
M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz
Pages
959-962
DOI
10.4028/www.scientific.net/KEM.324-325.959
Citation
Y. C. Zhang, W. A. Lian, W. Y. Zhang, "Factors Affecting the Low Cycle Fatigue Behavior around the Weak Axis of Welded I-Section Bracing Members ", Key Engineering Materials, Vols. 324-325, pp. 959-962, 2006
Online since
November 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Kenichi Ohi, Jae Hyouk Choi
Abstract:This paper deals with shape memory alloy. As a first step to assess the applicability of this kind of alloy in a structural system, a tension...
628
Authors: Jae Hyouk Choi, Kenichi Ohi
Abstract:Effectiveness of steel bracing system installed with fully mechanical interfaces is experimentally demonstrated through a series of...
635
Authors: Zuo Zhou Zhao, Qin Zhi Liu, Jia Ru Qian
Abstract:Steel braces are widely used in seismic retrofit of buildings. However, their tendency of buckling under compression impairs their efficacy....
1774
Authors: Wen Wen Jia, Deng Feng Wang
Chapter 2: Structural Engineering
Abstract:The brace at the mid-span of beam of portal frame provides lateral constraint and improves its overall stability. By the nonlinear finite...
869