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首页> 外文会议>Sustainable Performance of Concrete Bridges and Elements Subjected to Aggressive Environments: Monitoring, Evaluation amp; Rehabilitation >Monitoring of the 205-ft long Pretensioned Precast Super Girders of the Alaskan Way Viaduct, Seattle, WA
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Monitoring of the 205-ft long Pretensioned Precast Super Girders of the Alaskan Way Viaduct, Seattle, WA

机译：监控华盛顿州阿拉斯加路高架桥的205英尺长的预应力预制超级大梁

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The Alaskan Way Viaduct replacement project is a joint program between the Washington State Department of Transportation (WSDOT), the Federal Highway Administration (FHWA), the City of Seattle, King County and the Port of Seattle. The project consists of several sub-tasks including the total replacement of the State Route 99 double-deck viaduct. The Alaskan Way Viaduct is a vital factor for economic sustainability while serving as a major transportation artery for the greater Seattle metropolitan area. Span 2C of this project is 210-ft (64.01 m) long and consists of an 8-inch (203 mm) thick cast-in-place concrete slab supported on seventeen WF100G precast pretensioned concrete girders. Construction is split into two phases: Phase Ⅰ includes eight girders spaced at 6 ft-5 inches (1.96 m) on center and Phase Ⅱ includes nine girders spaced at 6 ft (1.83 m) on center. This span has an eleven-degree skew and includes four cast-in-place concrete diaphragms at quarter points in addition to the end diaphragms. The WF100G girders are each 205-ft (62.48 m) long and 100-inch (2540 mm) deep. Each girder is reinforced with eighty (80) 0.6-in. (15.24 mm) diameter, 270 ksi (1860 MPa), low-relaxation seven-wire strands. WSDOT in collaboration with Concrete Technology Corporation (CTC) and the George Washington University (GW) have instrumented four girders of the second phase with about forty (40) vibrating wire gauges. This paper presents the details of the on-going plan developed by the WSDOT/CTC/GW team to monitor the progress of prestress losses over a period of three years. The paper will also present the challenges that the team faced during the instrumentation stage.
机译：阿拉斯加公路高架桥更换项目是华盛顿州交通运输部（WSDOT），联邦公路管理局（FHWA），西雅图市，金县和西雅图港之间的一项联合计划。该项目包括几个子任务，包括完全更换99号州际公路双层高架桥。阿拉斯加公路高架桥是经济可持续发展的重要因素，同时也是大西雅图市区的主要交通要道。该项目的跨度2C长210英尺（64.01 m），由一块8英寸（203毫米）厚的现浇混凝土板组成，支撑在十七个WF100G预制预应力混凝土梁上。施工分为两个阶段：第一阶段包括八个梁，梁的中心间距为6英尺5英寸（1.96 m），第二阶段包括九个梁钢，间距为6英尺（1.83 m）。该跨度有11度的偏斜，除末端隔板外，在四分之一点处还包括四个现浇混凝土隔板。 WF100G大梁的长度为205英尺（62.48 m），深为100英寸（2540 mm）。每个大梁都有八十（80）个0.6英寸的钢筋。直径（15.24毫米），270 ksi（1860 MPa），低松弛七芯线。 WSDOT与混凝土技术公司（CTC）和乔治华盛顿大学（GW）合作，为第二阶段的四个大梁配备了大约四十（40）个振动线规。本文介绍了WSDOT / CTC / GW团队制定的正在进行的计划的详细信息，以监控三年内的预应力损失进度。本文还将介绍该团队在检测阶段所面临的挑战。

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