01555457

Component

Scour has been reported as the cause of approximately half of bridge failures in the United States. It alters static and dynamic characteristics of bridges and may lead to excessive deflections and increased maximum actions induced in structural members. To estimate the response of bridges under scour conditions, comprehensive models of representative bridges that overpass waterways are developed in this study. The bridge models account for the nonlinear soil-pile-structure interactions, the nonlinear response of the abutments and columns, as well as the predominantly linear contribution of the superstructure. Different types of scour, including local scour, general scour, and aggradation/degradation are investigated and their effects on the bridge structural system are quantified. The lateral response of the structure is studied as it varies dependently on the composition of the supporting soil profile and the magnitude of the scour depth. In addition, a set of scour scenarios is introduced to represent varying scour intensities that a bridge may experience during its service life. The effects of scour on the lateral performance of a case study bridge/soil profile have been evaluated using the developed analysis procedure. The analysis steps given in this paper provide engineers with a fast and accurate tool to analyze scour-critical bridges and to determine their integrity following possible flood events.

This paper was sponsored by TRB committee AHD30 Structures Maintenance.

01550057

15-5676

English

16p

2015

Transportation Research Board 94th Annual Meeting

Digital/other

Figures; References

Bridges; Flood damage; Scour; Structural analysis; Structural members

Bridges and other structures; Design; Highways; Maintenance and Preservation; I24: Design of Bridges and Retaining Walls

Transportation Research Board Annual Meeting 2015 Paper #15-5676

TRIS, TRB, ATRI

Dec 30 2014 1:54PM