Paper Title:
Fatigue-Cumulative Damage Model of RC Crane Girders Strengthened with FRP Strips
  Abstract

The cumulative damage of the reinforced concrete (RC) crane girders occurred by overload, fatigue and other reasons in service may deteriorate the safety of RC crane girders seriously, so it is necessary to analyze the damage mechanism and rationally reinforce them in good time. In this paper, RC crane girder strengthened with CFRP strips is taken as a target, and the mechanical performance degradation under fatigue load is studied. According to the basic theory of continuum damage mechanics, a damage variable is defined by flexural rigidity, and fatigue- cumulative damage model, which describes the process of damage and fracture, is established. The variation law of cumulative damage of RC crane girders strengthened with FRP strips under crane load is discussed, and the failure patterns such as concrete cracking, debonding between CFRP strips and concrete, yield of steel bars etc., are studied. The criterion which can be used to estimate the cumulative damage degree of strengthened RC crane girders is proposed. Finally, the evolution of the fatigue damage in the RC crane girders strengthened with CFRP strips is numerically simulated, and the results show that the proposed model can correctly describe the damage and failure process of strengthened RC crane girders. The research will provide a reference for the damage analysis and reinforcement of RC crane girders strengthened with CFRP strips.

  Info
Periodical
Key Engineering Materials (Volumes 385-387)
Edited by
H.S. Lee, I.S. Yoon and M.H. Aliabadi
Pages
165-168
DOI
10.4028/www.scientific.net/KEM.385-387.165
Citation
S. S. Zheng, B. Wang, L. Li, L. Zhang, P. J. Hou, "Fatigue-Cumulative Damage Model of RC Crane Girders Strengthened with FRP Strips", Key Engineering Materials, Vols. 385-387, pp. 165-168, 2008
Online since
July 2008
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: Ai Hong Wang, Ying Qi Liu, You Shan Gao
Chapter 1: Applied Mechanics and Dynamics, Mechanical Engineering, Manufacturing
Abstract:This paper estimates the fatigue residual life of bridge crane with probability distribution model of stress spectrum, which influences the...
139
Authors: Hiroki Tamai, Yoshimi Sonoda
Chapter 3: Engineering Application
Abstract:In the civil and structural engineering field, there are so many problems regarding act of impact loading against some structures due to...
500