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Update of the AASHTO LRFD Movable Highway Bridge Design Specifications

项目名称：	Update of the AASHTO LRFD Movable Highway Bridge Design Specifications
摘要：	Of the nearly 600,000 bridges listed in the Federal Highway Administration�s (FHWA) National Bridge Inventory, close to 1,000 bridges are movable bridges. The design and installation of structural, mechanical, and electrical components provide significant challenges for designers, contractors, and owners in any movable bridge project. The primary design guide for movable bridge design and construction is the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Movable Highway Bridge Design Specifications. This manual was first published in 2000 with 2002 Interim Revisions. The second edition of the manual was published in 2007, with yearly Interim Revisions from 2008 to 2014. Based on the input from movable bridge owners, designers, and industry representatives, there is a desire to further update the current specifications to develop and implement a reliability-based design methodology and to reflect advances in electrical drives and controls, mechanical systems, and traffic/marine safety systems. Toward this goal, National Cooperative Highway Research Program (NCHRP) Project 20-07/Task 348, �Review of the AASHTO LRFD Movable Highway Bridge Design Specifications for Future Updates,� was previously funded and a synthesis report prepared. The proposed title would no longer include the term �LRFD� (load and resistance factor design) and because, for movable machinery, power, and controls, the proposed specifications will adopt a reliability-based approach, which is consistent with how mechanical and electrical systems are designed. The research objectives are: (1) Propose revisions to the Specifications. The revisions should be prepared recognizing the latest developments in movable bridge design and rehabilitation. Additionally, the proposed revisions should be consistent with adopted AASHTO specifications and manuals. (2) Propose recommendations for future research needs.
状态：	Proposed
资金：	500000
资助组织：	Federal Aviation Administration
项目负责人：	Dekelbab, Waseem
开始时间：	20160511
预计完成日期：	0
实际结束时间：	0