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原文传递 State-of-the-Art Report on Precast Concrete Systems for Rapid Construction of Bridges.

题名：	State-of-the-Art Report on Precast Concrete Systems for Rapid Construction of Bridges.
作者：	Hieber-D.G.; Wacker-J.M.; Eberhard-M.O.; Stanton-J.F.
关键词：	Precast-concrete; Bridges-.;Construction-; Prestressed-concrete; Durability-; Structural-analysis; Fabrication-; Waterways-; Seismic-data.
摘要：	More extensive use of precast concrete components, which are fabricated off-site and then connected on-site, could allow bridges to be constructed more rapidly. The increased use of precast components in bridges also promises to increase work-zone safety and reduce environmental impacts for bridges that span waterways. This report discusses precast concrete systems that have been used for rapid bridge construction outside of Washington State and evaluates whether they are suitable for use within Western Washington. The report also identifies key features that are important for successful precast concrete system applications. Information on previously used systems was gathered through an extensive review of published literature. Washington State Department of Transportation (WSDOT) design and construction engineers, precast concrete producers, and bridge contractors were also consulted to obtain their input on the positive and negative aspects of applied systems. Most applications have been used in areas of low seismic potential. By contrast, Western Washington is subject to strong earthquakes. Because precast systems contain connections, and connections are typically vulnerable to seismic loading, a qualitative evaluation of the expected seismic performance of each system was deemed necessary. The researchers identified four types of precast concrete superstructure systems: full-depth precast concrete panels, partial-depth precast concrete panels, prestressed concrete multibeam superstructures, and preconstructed composite units.
报告类型：	科技报告