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原文传递 BRIDGE 1-351 OVER MUDDY RUN: DESIGN, TESTING, AND ERECTION OF AN ALL-COMPOSITE BRIDGE.

题名：	BRIDGE 1-351 OVER MUDDY RUN: DESIGN, TESTING, AND ERECTION OF AN ALL-COMPOSITE BRIDGE.
作者：	Gillespie-JW Jr.; Eckel-DA-II; Edberg-WM; Sabol-SA; Mertz-DR; Chajes-MJ; Shenton-HW-III; Hu-C; Chaudhri-M; Faqiri-A; Soneji-J
关键词：	Bridges-; Composite-materials; Deflection-; Design-; Durability-; E-glass-preforms; Erection-Building; Fabrication-; Fatigue-Mechanics; Glasgow-Delaware; Load-and-resistance-factor-design; Longitudinal-joints; Monitoring-; Muddy-Run-Creek; Performance-; Sandwich-construction; Strength-of-materials; Testing-; Vinyl-ester-resins
摘要：	Bridge 1-351 on Business Route 896 in Glasgow, Delaware, was replaced with one of the first state-owned all-composite bridges in the nation. Composites are lightweight construction materials that do not corrode, which results in benefits such as ease of construction and reduced maintenance costs. A summary of the design, large-scale testing, fabrication, erection, and monitoring of this bridge is presented. The bridge was designed to AASHTO load and resistance factor design specifications. A methodology was developed to incorporate the engineering properties of these unique composite materials into the design. The bridge consists of two 13 x 32 ft (3.96 x 9.75 m) sections joined by a unique longitudinal joint. The sections have sandwich construction consisting of a core [28 in. (71.12 cm) deep] and facesheets [0.4 to 0.6 in. (10.16 to 15.24 mm) thick] that provide shear and flexural rigidity, respectively. The composite bridge was fabricated with E-glass preforms and vinyl-ester resin, which offers excellent structural performance and long-term durability. Each of the sections was fabricated to near-net shape in a single step by a vacuum-assisted resin transfer molding process. The overall structural behavior has been accurately predicted with simple design equations based on sandwich theory for anisotropic materials. Large-scale testing of full-sized subcomponents was conducted to prove that the design satisfied deflection, fatigue, and strength limit states. A redundant longitudinal joint was designed that consisted of both an adhesively bonded vertical joint between sections and splice plates. Assembly procedures were developed, and transverse testing of the full-sized joint was conducted. Final bridge sections were proof-tested to the strength limit state. The construction phase included section positioning, joint assembly, and application of a latex-modified concrete wear surface. The bridge was reopened to traffic on November 20, 1998. Results from the long-term monitoring effort will be documented.
总页数：	Conference Title: Fifth International Bridge Engineering Conference. Location: Tampa, Florida. Sponsored by: Transportation Research Board
报告类型：	科技报告