Structural damage detection based on crack damage function and equivalent damage factor vector
Structural damage detection(SDD)has become a vital issue in the field of structural health monitoring(SHM)and a variety of SDD approaches have been proposed and widely applied in the SHM field.The model of element stiffness reduction is commonly used to describe structural damage,but it is hard to apply in quantifying damage associated to cracks,the commonest type of structural damage on-site.The occurrence of cracks will complicate the distribution of structural flexural rigidity and the equivalent element stiffness reduction related to the cracks is vague.In this study,an equivalent element stiffness reduction model(EESRM)is proposed to determine the equivalent element stiffness reduction induced by cracks based on both strain-stress field model and pure bending analysis of finite element(FE)model,and the equivalent damage factor vector(EDFV)is accordingly calculated.A simplysupported beam with rectangular section is used to verify the capabilities of the proposed approach numerically and experimentally by which the identified damages show a good agreement with the equivalent values,in which measured modal frequencies and mode shapes are used in SDD with the application of particle swarm optimization-Nelder-Mead method.
structural damage detection (SDD) crack damage function equivalent damage factor vector (EDFV) experimental verifications
Zepeng Chen Ling Yu
School of Mechanics and Construction Engineering,Jinan University,Guangzhou 510632,China School of Mechanics and Construction Engineering,Jinan University,Guangzhou 510632,China;MOE Key Lab
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
2832-2840
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）