IDENTIFICATION OF PRESTRESS FORCE IN CONCRETE BEAMS BY FINITE ELEMENT MODEL UPDATING
This paper presents a numerical study of finite element model updating to identify prestress force in a concrete beam. A finite element model for prestressed and reinforced concrete beam is developed. A newly developed optimization method, Clonal Selection Algorithm (CSA), is adopted for model updating calculations. Several objective functions, defined in terms of the static response, vibration frequencies of the beam, changes in the vibration frequencies, or the weighted combination of the static response and vibration frequencies, are used for finite element model updating. It is found that the changes in the vibration frequencies, among the four considered objective functions, give the best identification results of the prestress force in the beam. By smearing the vibration frequencies with different level of noises, the updating still successfully identified the prestress force. Numerical simulations demonstrate to the reliability of the method in identifying the prestress force in concrete beams.
Prestress force Finite element Clonal selection algorithm Model updating
Ying Wang Xin-Qun Zhu Hong Hao Jin-Ping Ou
CRC for Integrated Engineering Asset Management School of Civil and Resource Engineering, the Univer CRC for Integrated Engineering Asset Management School of Civil and Resource Engineering, the Univer School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, P. R. China
国际会议
第十届国际结构工程青年学者研讨会(The Tenth International Symposium on Structural Engineering for Young Experts)
长沙
英文
1477-1482
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）