详情

原文传递 INNOVATIVE PRESTRESSED STEEL COMPOSITE SHORT- TO MEDIUM-SPAN BRIDGES.

题名：	INNOVATIVE PRESTRESSED STEEL COMPOSITE SHORT- TO MEDIUM-SPAN BRIDGES.
作者：	Burroughs-D; Lockwood-J; Price-K
关键词：	PRESTRESSED-STEEL-COMPOSITE-BRIDGES; PRESTRESSING-; HIGH-PERFORMANCE-STEELS; COMPOSITE-BEAM-BRIDGE-DECKS; PERFORMANCE-; CONSTRUCTIBILITY-; AESTHETICS-; ECONOMICS-; INNOVATION-; BRIDGE-DESIGN; SHORT-SPAN-BRIDGES; MEDIUM-SPAN-BRIDGES; CORROSION-RESISTANT-STEELS; PLATE-GIRDERS; BOX-GIRDERS; TRUSSES-; INTEGRAL-ABUTMENTS; INTEGRAL-PIERS
摘要：	Methods for combining both prestressing, high-performance steel and composite concrete decks to improve bridge performance, constructibility, aesthetics, and economy are reviewed. The designs are part of a study sponsored by the American Iron and Steel Institute. Five bridge concepts have been developed to the preliminary design phase, including plan details and cost comparisons. Single- and two-span bridges with span lengths of between 24.4 and 54.9 m (80 and 180 ft) have been studied. The alternates developed use prestressing both longitudinally in the main structural components and transversely in the deck. Alternates include a modular space truss, a twin warren truss, a composite steel box, and steel girders. All alternates have either a cast-in-place or a precast concrete deck. Advantages include improved durability and reduced maintenance with the use of prestressing in the deck, which eliminates deck cracking. The use of corrosion-resistant steel eliminates painting requirements. Elimination of deck joints and use of integral piers and abutments also improve durability. Economy can be improved with the combined efficient use of steel, prestressing, and concrete; with the use of jointless bridges and integral abutments and piers; and by increasing shipping lengths, reducing the number of splices, and optimizing construction methods, which are integrated into the design. Construction issues are reviewed to reduce fabrication costs and to simplify bridge erection.
总页数：	Transportation Research Record. 1997. (1594) pp21-33 (9 Fig., 1 Tab.)
报告类型：	科技报告