01020212

Component

https://doi.org/10.3141/1928-09

http://scholar.google.com...zell&publication_year=2005

Bridge 207 is a two-span horizontally curved steel plate girder bridge near Port Matilda, Pennsylvania. Although the curvature is not severe, the curvature combined with the unequal span balance caused an unusual distribution of force effects in the girders. A global twisting of the superstructure was caused by the unequal vertical deflections in the two spans. The computer program BSDI-3D was used to analyze the curved superstructure. To account for the out-of-plumb condition of the girders in their final condition, additional lateral flange bending moments were calculated. The magnitude of the additional lateral moments was a function of the vertical bending moments and the degree of twist in the girder. Field monitoring of the structure is focusing on the effects of curvature during construction. This is being accomplished by developing a detailed time line of superstructure erection and deck placement and through monitoring of the bridge by using vibrating wire strain gauges and tiltmeters positioned at critical locations on the girders and cross-frames. Field data were recorded before and after critical construction events, such as girder erection, cross-frame and formwork placement, and the deck pour. This information is being used to determine the effects of curvature on the cross-frames during construction by using axial stresses and strains and on the girders by using warping stresses and strains.

01020206

English

pp 83-91

2005

Transportation Research Record: Journal of the Transportation Research Board

030909402X

Print

Figures (6) ; Photos (2) ; References (6) ; Tables (4)

Before and after studies; Bending moments; Bridge design; Bridge superstructures; Construction; Curved bridges; Flanges; Monitoring; Plate girder bridges; Steel plates; Strain (Mechanics); Strain gages; Stresses

BSDI-3D (Computer program)

Field data; Horizontal curvature; Tiltmeters; Vertical deflection

Port Matilda (Pennsylvania)

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

TRIS, TRB, ATRI

Mar 13 2006 10:05PM

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