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The deflection reasons for long-span prestressed concrete box-girder (LPCB) bridge are still ambiguous. This paper pointed out some outstanding advantages of using fiber optical sensing (FOS) technology in old LPCB Bridge strengthening monitoring. According to certain existing old LPCB Bridge strengthening monitoring example,it presented some direct and indirect monitoring indexes that should be contained...
Single method for damage identification is not sensitive to some damages. A new damage identification method is proposed in this paper based on Frequency Response Function and wavelet packet, Take frequency response functions (FRF) which before and after structure damage as signals and carry out wavelet packets analysis. By simulation of damage detection to the continuous beam, it proves feasibility...
Health diagnosis of bridge by traditional model-based method would face strong difficulty in constructing an accurately finite element model (FEM) due to the document lack of old bridge and the change of the structural parameters of bridge in the service. The further challenge still lies in the uncertainty of the ambient excitation in structural health monitoring of bridge. In this paper, an improved...
In order to solve the problem about structure health monitoring system construction of rigid frame-continuous beam bridge, taking Jin Shui Gou Bridge as the study object, the health monitoring system of rigid frame-continuous beam bridge was studied, and the selection basis of project for health monitoring system was proposed in this paper. The health monitoring system of Jin Shui Gou Bridge was analyzed,...
A novel sensor layout method is proposed for bridge health monitoring. The aim of the method is to select sensor locations from a set of possible candidate positions for achieving the best identification of modal frequencies and mode shapes. Sensor layout problem is a combinatorial optimization problem and genetic algorithm is suitable to solve the problem. Commonly, one dimension coding is often...
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