Stability formulations and design of buckling-restrained braces considering stiffness degradation

Structures ◽  
2022 ◽  
Vol 37 ◽  
pp. 140-153
Author(s):  
Yanchao Yue ◽  
Kai Jia ◽  
Tangbing Chen ◽  
Changxin Li ◽  
Yongtao Bai
Keyword(s):  
Stiffness Degradation ◽  
Buckling Restrained Braces

Plate Wave Characterization of Stiffness Degradation in Composites During Fatigue

1998 ◽  
Vol 10 (1) ◽  
pp. 147-162
Author(s):  
J. -R. Shih ◽  
A. K. Mai ◽  
M. Vemuri
Keyword(s):  
Stiffness Degradation ◽  
Plate Wave

Low-Cycle Fatigue Performance of Buckling Restrained Braces and Assessment of Cumulative Damage under Severe Earthquakes

2018 ◽  
Vol 763 ◽  
pp. 867-874
Author(s):  
Yu Shu Liu ◽  
Ke Peng Chen ◽  
Guo Qiang Li ◽  
Fei Fei Sun
Keyword(s):  
Fatigue Life ◽  
Energy Dissipation ◽  
Structural Reliability ◽  
Low Cycle Fatigue ◽  
Engineering Application ◽  
Fatigue Performance ◽  
Cycle Fatigue ◽  
Variable Amplitude ◽  
Buckling Restrained Braces ◽  
Energy Dissipation Devices

Buckling Restrained Braces (BRBs) are effective energy dissipation devices. The key advantages of BRB are its comparable tensile and compressive behavior and stable energy dissipation capacity. In this paper, low-cycle fatigue performance of domestic BRBs is obtained based on collected experimental data under constant and variable amplitude loadings. The results show that the relationship between fatigue life and strain amplitude satisfies the Mason-Coffin equation. By adopting theory of structural reliability, this paper presents several allowable fatigue life curves with different confidential levels. Besides, Palmgren-Miner method was used for calculating BRB cumulative damages. An allowable damage factor with 95% confidential level is put forward for assessing damage under variable amplitude fatigue. In addition, this paper presents an empirical criterion with rain flow algorithm, which may be used to predict the fracture of BRBs under severe earthquakes and provide theory and method for their engineering application. Finally, the conclusions of the paper were vilified through precise yet conservative prediction of the fatigue failure of BRB.

Experimental study on stiffness degradation of Crts Ⅱ ballastless track-bridge structural system under fatigue train load

2021 ◽  
Vol 283 ◽  
pp. 122794
Author(s):  
Ling-Yu Zhou ◽  
Lei Zhao ◽  
Akim D. Mahunon ◽  
Ying-Ying Zhang ◽  
Hua-Yong Li ◽  
...  
Keyword(s):  
Experimental Study ◽  
Stiffness Degradation ◽  
Structural System ◽  
Ballastless Track ◽  
Track Bridge

Numerical modelling of glulam frames with buckling restrained braces

2021 ◽  
Vol 239 ◽  
pp. 112338
Author(s):  
Wenchen Dong ◽  
Minghao Li ◽  
Chin-Long Lee ◽  
Gregory MacRae
Keyword(s):  
Numerical Modelling ◽  
Buckling Restrained Braces

Study on the stiffness degradation in concrete continuous beam with externally prestressed CFRP tendons under fatigue loading

2021 ◽  
pp. 136943322199249
Author(s):  
Xing Li ◽  
Jiwen Zhang ◽  
Jun Cheng
Keyword(s):  
Fatigue Life ◽  
Fatigue Loading ◽  
Load Level ◽  
Fiber Reinforced Polymer ◽  
Stiffness Degradation ◽  
Test Results ◽  
Reinforced Polymer ◽  
Continuous Beams ◽  
Practical Engineering ◽  
Good Agreement

This paper presents fatigue behaviors and the stiffness degradation law of concrete continuous beams with external prestressed carbon fiber-reinforced polymer (CFRP) tendons. Three specimens were tested under fatigue loading, and the influence of different load levels on the stiffness degradation and fatigue life were studied, and it was found that the stiffness degradation of three test specimens exhibited a three-stage change rule, namely rapid decrease, stable degradation, and sharp decline, but there are obvious differences in the rate and amplitude of stiffness degradation. The load level has a significant influence on the fatigue life of the test specimens. An analytical model with load level considered was proposed to calculate the residual stiffness and predict the stiffness degradation, which is in good agreement with the test results. The model of stiffness degradation presents a possible solution for practical engineering applications of concrete continuous beams with externally prestressed CFRP tendons subjected to different fatigue loadings.

Bending fatigue of single-wall and double-wall corrugated paperboards under sinusoidal and random loads

2021 ◽  
pp. 109963622110204
Author(s):  
Zhi-Wei Wang ◽  
Yang-Zhou Lai ◽  
Li-Jun Wang
Keyword(s):  
Energy Dissipation ◽  
Fatigue Failure ◽  
Fatigue Tests ◽  
Stiffness Degradation ◽  
Random Load ◽  
Bending Fatigue ◽  
Random Loads ◽  
Vibration Fatigue ◽  
Sinusoidal Load ◽  
Double Wall

The bending fatigue tests of single-wall and double-wall corrugated paperboards were conducted to obtain the εrms– N curves under sinusoidal and random loads in this paper. The εrms– N equation of corrugated paperboard can be described by modified Coffin–Manson model considering the effect of mean stress. Four independent fatigue parameters are obtained for single-wall and double-wall corrugated paperboards. The εrms– N curve under random load moves left and rotates clockwise compared with that under sinusoidal load. The fatigue life under random load is much less than that under sinusoidal load, and the fatigue design of corrugated box should be based on the fatigue result under random load. The stiffness degradation and energy dissipation of double-wall corrugated paperboard before approaching fatigue failure are very different from that of single-wall one. For double-wall corrugated paperboard, two turning points occur in the stiffness degradation, and fluctuation occurs in the energy dissipation. Different from metal materials, the bending fatigue failure of corrugated paperboard is a process of wrinkle forming, spreading, and folding. The results obtained have practical values for the design of vibration fatigue of corrugated box.

scholarly journals EXPERIMENTAL STUDY ON BRITTLE FRACTURE OF BUCKLING-RESTRAINED BRACES

2013 ◽  
Vol 78 (691) ◽  
pp. 1613-1620
Author(s):  
Ryunosuke ITO ◽  
Tadao NAKAGOMI ◽  
Masatoshi MURAI ◽  
Mamoru IWATA ◽  
Ryota WAKAI
Keyword(s):  
Experimental Study ◽  
Brittle Fracture ◽  
Buckling Restrained Braces

Application of buckling-restrained braces to earthquake-resistant design of buildings: A review

2021 ◽  
Vol 246 ◽  
pp. 112991
Author(s):  
Yun Zhou ◽  
Hetian Shao ◽  
Yongsheng Cao ◽  
Eric M. Lui
Keyword(s):  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Buckling Restrained Braces
Sign in / Sign up

Export Citation Format

Share Document