Seismic Design and Analysis of a Precast Segmental Concrete Bridge Model

MCEER is a national center of excellence dedicated to the discovery and development of new knowledge, tools and technologies that equip communities to become more disaster resilient in the face of earthquakes and other extreme events. MCEER accomplishes this through a system of multidisciplinary, multi-hazard research, in tandem with complimentary education and outreach initiatives. Headquartered at the University at Buffalo, The State University of New York, MCEER was originally established by the National Science Foundation in 1986, as the fi rst National Center for Earthquake Engineering Research (NCEER). In 1998, it became known as the Multidisciplinary Center for Earthquake Engineering Research (MCEER), from which the current name, MCEER, evolved. Comprising a consortium of researchers and industry partners from numerous disciplines and institutions throughout the United States, MCEER’s mission has expanded from its original focus on earthquake engineering to one which addresses the technical and socio-economic impacts of a variety of hazards, both natural and man-made, on critical infrastructure, facilities, and society. The Center derives support from several Federal agencies, including the National Science Foundation, Federal Highway Administration (FHWA), and the Department of Homeland Security/Federal Emergency Management Agency, State of New York, other state governments, academic institutions, foreign governments and private industry. The Center’s Highway Project, primarily funded by the FHWA since 1992, focuses on the development of improved seismic design, evaluation, and retrofi t methodologies and strategies for new and existing bridges and other highway structures. Over the years, MCEER has produced a new seismic retrofi tting manual, consisting of two parts (bridges and other highway structures), as well as research products on the seismic retrofi tting of truss bridges, seismic isolation manual and Risks from Earthquake Damage to Roadway System (REDARS). In 2007, MCEER was awarded a new contract, “Innovative Technologies and Their Applications to Enhance the Seismic Performance of Highway Bridges.” The major focus of the research program is on the development of detailed technology to apply accelerated bridge construction (ABC) in seismic regions, and the development of innovative seismic protection technologies that can enhance the seismic performances of precast reinforced concrete bridges with an emphasis on ABC. The primary objective of this study is to investigate the response of precast segmental concrete bridge structures, designed according to Accelerated Bridge Construction (ABC) techniques, when subjected to earthquake loading. A large-scale model of a single-span segmental bridge was designed to be tested on the dual six-degree of freedom shake tables of the Structural Engineering and Earthquake Simulation Laboratory (SEESL) at the University of Buffalo. The AASHTO LRFD Bridge Design Specifi cations and the PCI Bridge Design Manual were used for the design of the bridge model. A key concept incorporating post-tensioned internal unbonded tendons acting as the only continuous reinforcement between adjacent segments of both the superstructure and substructure was introduced in the design. Unbonded tendons can allow the triggering of a gap opening mechanism between adjacent segments and the system’s self-centering response when subjected to seismic loads. In a companion effort, a two-dimensional numerical model of the segmental bridge superstructure was developed to verify its behavior under vertical seismic loads. The numerical model was analyzed under a series of vertical seismic excitations using nonlinear time-history dynamic analysis methods and its seismic response was evaluated considering different seismic intensities. The development and design of the segmental bridge model as well as the response of the superstructure’s numerical model under vertical seismic loads are presented in this report.

Details

Title	Seismic Design and Analysis of a Precast Segmental Concrete Bridge Model
Pages	208
Language	English
Format	PDF
Size	7 MB
Download Method	Direct Download
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