01592692

Component

This paper presents temperature-based (TB) evaluation and monitoring techniques for long-span steel bridges. The underlying TB concept is based on the notion that temperature variations can be treated as measureable loading for bridges and thus can be used to obtain a complete input-output relationship for structural evaluation. This is achieved through instrumentation of select members and movement systems. Each location includes sensing for measurement of the temperature (input) along with the corresponding strains, displacements, and/or rotations (output). These measured relationships can identify a unique signature (or baseline) of the structure. The TB signature can be utilized within the structural identification framework, termed TBSI. This signature may also be leveraged for identification of unusual structural behaviors within a structural health monitoring framework, termed TBSHM. In addition, the signature may be utilized to supplement visual inspection, termed periodic temperature-based assessment (PTBA). A general overview of each method is presented along with an application on a long-span steel tied-arch bridge.

This paper was sponsored by TRB committee AFF20 Standing Committee on Steel Bridges.

01584066

16-2103

English

17p

2016

Transportation Research Board 95th Annual Meeting

Digital/other

Figures; Photos; References

Arch bridges; Evaluation and assessment; Inspection; Long span bridges; Steel bridges; Structural health monitoring; Temperature

Bridges and other structures; Highways; Maintenance and Preservation

Transportation Research Board Annual Meeting 2016 Paper #16-2103

PRP, TRIS, TRB, ATRI

Jan 12 2016 4:55PM