DAMAGE ASSESSMENT OF A RC FRAME USING FE MODEL UPDATING TECHNIQUE
Recently finite element (FE) model updating methods have been widely used in nondestructive damage assessment field. In this study, a sensitivity-based FE updating procedure is carried out to locate and quantify damages in a tested reinforced concrete (RC) frame. The discrepancies between the experimental and numerical modal parameters (frequencies and mode shapes) are minimized to adjust the undetermined physical property, Youngs modulus of concrete. A simplified multidimensional (step) damage function is employed to reduce the number of the unknown variables to a great extent. Using damage function largely improves the convergence performance of the iterative sensitivity matrix. A three-step updating procedure is carried out, which aims to firstly obtain the referenced FE model of the frame and then accurately identify the damage expressed by stiffness reduction. It is shown that the damage location and the corresponding severity can be identified correctly using this method.
Sheng-En Fang Ricardo Perera Consuelo Huerta
Department of Structural Mechanics and Industrial Constructions, ETSII, Universidad Politecnica de M Department of Structural Mechanics and Industrial Constructions, ETSII, Universidad Politecnica de M
国际会议
长沙
英文
726-732
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）