Damage assessment of bridge construction based onmulti-stage subregion mobile test

摘要

ublishercopyright>? 2019, Jilin University Press. All right reserved.? 2019, Jilin University Press. All right reserved. To solve the problem of excessive number of sensors and to optimize the measuring points in damage assessment of bridge structures, a method of multi-stage subregion mobile test was presented based on the displacement coordination condition of continuum and state stochastic space theory. This method can be used to identify the mode shape of overall structure by sub-region. The diagnosis method based on modal flexibility coefficient for angle element as damage index is proposed. The analysis results show that the new approach can exactly and efficiently obtain complete structural dynamic response data with less equipment conditions, and gain more precise outcome.To solve the problem of excessive number of sensors and to optimize the measuring points in damage assessment of bridge structures, a method of multi-stage subregion mobile test was presented based on the displacement coordination condition of continuum and state stochastic space theory. This method can be used to identify the mode shape of overall structure by sub-region. The diagnosis method based on modal flexibility coefficient for angle element as damage index is proposed. The analysis results show that the new approach can exactly and efficiently obtain complete structural dynamic response data with less equipment conditions, and gain more precise outcome.