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- W633280435 abstract "Rehabilitation of a four-span, continuous, articulated, steel plate girder bridge (Yuba Pass Overhead) to remedy a deteriorated deck and upgrade the structure for recent changes in Caltrans live loading criteria suggested need for: 1) scalping and subsequent thickening of the deck; 2) addition of auxiliary steel flanges; and, 3) making two currently non-composite spans composite. Resulting increased loads suggested additional need for post-tensioning girder webs in critical tensile regions with tendon forces significantly larger than used previously. Two computer codes, CURVBRG and FINPLA, developed in previous Caltrans research, are used in conjunction with STRUDL to assess localized web stresses at prestressing bracket locations. CURVBRG: 1) assessed real need for prestressing; 2) located critical live loads; and, 3) provided boundary displacements and reactions for FINPLA, which assessed displacements for all types of loads at boundaries os a small, substructered, STRUDL, finite element mesh. CURVBRG indicated questionable need for post-tensioning in three of the four spans, half the design prestress in the fourth, and again demonstrated ultra-conservatism of current AASHTO design specifications when applied to partial width live loads. The analysis also indicated localized web stresses significantly above yield. A step-by-step analytical procedure for one bracket, and results for all brackets, are described. Use of CURVBRG in all such future rehabilitation planning is recommended. Use of the described analytical method should be accompanied by prior establishment of guidelines for limiting allowable web stresses. (Author) web stresses. (Author)" @default.
- W633280435 created "2016-06-24" @default.
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- W633280435 date "1985-02-01" @default.
- W633280435 modified "2023-09-27" @default.
- W633280435 title "LOCALIZED STRESSES IN A POST-TENSIONED, STEEL, GIRDER WEB-AN IMPLEMENTATION OF CURVBRG AND FINPLA" @default.
- W633280435 hasPublicationYear "1985" @default.
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