Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Despite the increasing use of skew bridges in modern highways, no sufficient information exists for estimating the correct reaction forces generated at their bearings. In the research a three-dimensional finite element discretization scheme was developed and used in a parametric study conducted on 36 simply supported composite multi-stringer steel bridges with different span lengths, deck widths and skew angles supported on bolster and rocker bearings. Results from field load tests of two bridges one skew tangent simply supported bridge and the other two span continuous tangent skew bridge, confirmed the validity of the finite element analysis discretization scheme used. Based on nonlinear regression analysis of the data base generated from the 36 bridges investigated, practical expressions suitable for use with rocker and bolster bearings were developed for evaluating reaction components of medium span simply supported multi-stringer composite steel bridges under dead load increments and maximum live load effects. Use of elastomeric bearings in lieu of bolster and rocker bearings in the 36 bridges investigated, resulted in a slight reduction of vertical reaction components (about 8%) and large reduction of other reaction components.
Despite the increasing use of skew bridges in modern highways, no sufficient information exists for estimating the correct reaction forces generated at their bearings. In the research a three-dimensional finite element discretization scheme was developed and used in a parametric study conducted on 36 simply supported composite multi-stringer steel bridges with different span lengths, deck widths and skew angles supported on bolster and rocker bearings. Results from field load tests of two bridges one skew tangent simply supported bridge and the other two span continuous tangent skew bridge, confirmed the validity of the finite element analysis discretization scheme used. Based on nonlinear regression analysis of the data base generated from the 36 bridges investigated, practical expressions suitable for use with rocker and bolster bearings were developed for evaluating reaction components of medium span simply supported multi-stringer composite steel bridges under dead load increments and maximum live load effects. Use of elastomeric bearings in lieu of bolster and rocker bearings in the 36 bridges investigated, resulted in a slight reduction of vertical reaction components (about 8%) and large reduction of other reaction components.
Forces at Bearings of Skewed Bridges
A. G. Bishara (Autor:in)
1992
373 pages
Report
Keine Angabe
Englisch
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