A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Forces Exerted in the Wingwalls of Skewed Semi-Integral Bridges
In the state of Ohio, semi-integral bridges have become more popular because these bridges eliminate high maintenance joints. The girders in a semi-integral bridge are encased in a diaphragm supported on elastometric pads that bear on the abutment. Movement of the diaphragm caused by thermal change is theoretically resisted by backfill and also by the wingwalls for skewed bridges. The wingwalls are subjected to forces as a skewed bridge rotates during thermal expansion. In order to determine the magnitude of forces generated in the wingwalls, load cells were installed between the wingwall and diaphragm during construction of a semi-integral skewed bridge. The bridge was located in The Plains, OH on state route 682 and spanned the Hocking River. The bridge had four spans with the outer spans being 21.3 m (70 ft.) and the inner spans being 26.5 m (87 ft.) The load cells measured the force in the wingwalls as the bridge was constructed and subjected to thermal changes during the period of 5/99 to 9/00. Measurements of the movement of the joint between the wingwall and the diaphragm were also made during this period. The forces were found to be significant. Simplified finite element models and analysis of the monitored bridge were performed. In addition, bridges with different spans and skews were also modeled and analyzed.
Forces Exerted in the Wingwalls of Skewed Semi-Integral Bridges
In the state of Ohio, semi-integral bridges have become more popular because these bridges eliminate high maintenance joints. The girders in a semi-integral bridge are encased in a diaphragm supported on elastometric pads that bear on the abutment. Movement of the diaphragm caused by thermal change is theoretically resisted by backfill and also by the wingwalls for skewed bridges. The wingwalls are subjected to forces as a skewed bridge rotates during thermal expansion. In order to determine the magnitude of forces generated in the wingwalls, load cells were installed between the wingwall and diaphragm during construction of a semi-integral skewed bridge. The bridge was located in The Plains, OH on state route 682 and spanned the Hocking River. The bridge had four spans with the outer spans being 21.3 m (70 ft.) and the inner spans being 26.5 m (87 ft.) The load cells measured the force in the wingwalls as the bridge was constructed and subjected to thermal changes during the period of 5/99 to 9/00. Measurements of the movement of the joint between the wingwall and the diaphragm were also made during this period. The forces were found to be significant. Simplified finite element models and analysis of the monitored bridge were performed. In addition, bridges with different spans and skews were also modeled and analyzed.
Forces Exerted in the Wingwalls of Skewed Semi-Integral Bridges
E. Steinberg (author) / S. Sargand (author)
2001
95 pages
Report
No indication
English
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