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Date of Publication:2022-10-09

Journal:工程力学

Affiliation of Author(s):运载工程与力学学部

Issue:4

Page Number:50-54,198

ISSN No.:1000-4750

Abstract:A damage identification method for multi-span beam structures was proposed in this paper. The conventional damage indicator methods such as flexibility matrix method have difficulty in dealing with the damage identification of complex continuum structure such as multi-span beams. The present method takes the change rates of certain diagonal elements of the structural flexibility matrix as identification indicator function. The blanketing effect of the identification indicator function with respect to the damage factors makes it easy to identify the damage of multi-span beam structures. Some useful formulas were derived and the sensitivity matrix of the indicator function was studied. A numerical simulation is performed and the identification results of several damage status were compared. The results show that the present indicator function method is very simple and effective. It is especially suitable for the damage identification of the multi-span beam structures such as bridges.

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