Predicting Deflections in Concrete-Filled Grid Deck Panels

Abstract

Laboratory test results from six different concrete-filled steel-grid bridge deck panels of one and two spans with approximate midspan loadings were compared with finite difference solutions of a governing differential orthotropic plate equation. The orthotropic plate equation was based on assumptions related to fully composite behavior. The effects of changes in properties due to increasing loads were examined. A means of predicting deflections in other laboratory panels was developed, and the results were extended to permit the estimating of deflections in actual bridge decks.

Investigation of Load Distribution Factors for Two-Span Continuous Composite Multiple Boxgirder Bridges

“…Few researchers, (a many thesis Baker, T.H. 1991;Gangarao et al 1992 ;Mangelsdorf et al 2002 ;Huang et al 2002 ;Higgins, 2004 ;and Huang et al 2007 have utilized orthotropic thin plate theory for analyzing orthotropic bridge decks. However, the estimation of the flexural and torsional stiffnesses is considered to be one major problem in this method.…”

Unified approach for bridge deck design

“…In all cases discussed poison's ratio was assumed to be zero as per (Higgins, Turan, Connor, & Liu, 2011), which sets equation 20 to zero. As reported in (Mangelsdorf, Baker, & Swanson, 2002) while concrete in grid cells are experiencing poison's ration in biaxial behavior, they might be restricted to exhibit that behaviour due to the confinement of the grid, restricting the expansion of concrete laterally, leading to a practical assumption of poisons ration equal to zero. While (Baker, 1991) mentioned that comparing D x and D y , the effect of D 1 is very small Based on these assumptions Dx and Dy would be reduced E x I x and E y I y respectively.…”