A Mobile Impact Testing Method for Rapid Bridge Evaluation
Traditional multi-reference impact testing (MRIT)has the merit to produce not only structural modal pa rameters but also structural flexibility, however it requires a number of instruments mounted on the whole structure leading to expensive cost and much experiment time.A new impact test method is proposed in this article for faster and more efficient flexibility identification of bridges.In the proposed method, the investiga ted structure is subdivided into smaller substructures that will be tested independently, and test data of all substructures are integrated by taking the interface measurement as reference for flexibility identification of the whole structure.The new impact testing method requires limited instrumentation thus it can be performed rapidly and efficiently.Especially, the signal processing procedure developed in the proposed method is able to identify the full flexibility matrix of the whole structure from the sparse FRF matrixes of the substructures.Numerical and experimental examples are investigated to demonstrate the effectiveness of the proposed meth od by comparing its results with those from the traditional MRIT method for structural flexibility identification and deflection prediction.
Jian Zhang
International Institute for Urban Systems Engineering, Southeast University, Nanjing, China
国际会议
哈尔滨
英文
605-611
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）