Tehnički vjesnik, Vol. 27 No. 1, 2020.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20190822100443
Research on Bridge Structural Health Assessment Based on Finite Element Analysis
Xu Luo*
; School of Mechanics and Construction Engineering, Jinan University, 601 Huangpu Avenue West, Guangzhou, China
Xinping LI
; School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, China
Xinsha Fu
; School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, China
Lixiong Gu
; School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, China
Sažetak
In view of the content of bridge condition assessment and health monitoring, this paper is based on the finite element simulation analysis. The uncertain finite element model updating method based on sequential optimization strategy is studied, and the uncertain modal parameter data obtained by health monitoring system are applied to upgrade the uncertain finite element model of cable-stayed bridges, which provides a more accurate finite element model for subsequent reliability analysis. Firstly, the finite element dynamic analysis of the main span structure of the bridge is carried out, and the natural frequencies and modes are obtained. Then the measured natural frequencies of the structure are obtained by estimating the power spectrum of the dynamic monitoring data, and the theoretical values are compared with the measured ones. The dynamic characteristics of the modified two-stayed bridge finite element model are verified by the load test results. The results show that the modified finite element model can simulate the dynamic characteristics of the actual structure well. Most of the measured and calculated displacement increments were within the margin of error. The error is within 5%, which can accurately reflect the true stress state of the structure. The uncertainty model based on the sequential optimization strategy is simple and can be applied to the uncertainty of the finite element model of the actual bridge structure.
Ključne riječi
bridge data; finite element simulation; health monitoring; state assessment
Hrčak ID:
234165
URI
Datum izdavanja:
15.2.2020.
Posjeta: 1.376 *