Optimized Sections for High-strength Concrete Bridge Girders PDF Download
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Author: H. G. Russell Publisher: ISBN: Category : BRIDGE (Computer file) Languages : en Pages : 172
Book Description
The objectives of this investigation were: to identify the limitations of existing prestressed concrete girder cross sections relative to the use of high-strength concrete; to examine the feasibility of using modified cross sections to take advantage of the high-strength concretes; to investigate the use of alternative construction systems; and to define factors that limit the application of high-strength concrete. The research was performed using the computer program "BRIDGE" to determine relative unit costs and maximum span lengths for different simple-span prestressed concrete bridge designs
Author: H. G. Russell Publisher: ISBN: Category : BRIDGE (Computer file) Languages : en Pages : 172
Book Description
The objectives of this investigation were: to identify the limitations of existing prestressed concrete girder cross sections relative to the use of high-strength concrete; to examine the feasibility of using modified cross sections to take advantage of the high-strength concretes; to investigate the use of alternative construction systems; and to define factors that limit the application of high-strength concrete. The research was performed using the computer program "BRIDGE" to determine relative unit costs and maximum span lengths for different simple-span prestressed concrete bridge designs
Author: Publisher: ISBN: Category : Bridges, Concrete Languages : en Pages : 172
Book Description
The objectives of this investigation were to evaluate the latest prestressed concrete bridge girder designs being used in the United States and to determine which represent optimum designs that could be promoted as national or regional standards. Bridges built with pretensioned I- and T-sections for spans in excess of 80 ft (24.4 m) and concrete compressive strengths up to 7000 psi (48.3 MPa) were considered.
Author: Sandy Shuk-Yan Poon Publisher: ISBN: 9780494594490 Category : Languages : en Pages : 290
Book Description
Span-to-depth ratio is an important bridge design parameter that affects structural behaviour, construction costs and aesthetics. A study of 86 constant-depth girders indicates that conventional ratios have not changed significantly since 1958. These conventional ratios are now questionable, because recently developed high-strength concrete has enhanced mechanical properties that allow for slenderer sections.Based on material consumption, cost, and aesthetics comparisons, the thesis determines optimal ratios of an 8-span highway viaduct constructed with high-strength concrete. Three bridge types are investigated: cast-in-place on falsework box-girder and solid slabs, and precast segmental span-by-span box-girder. Results demonstrate that total construction cost is relatively insensitive to span-to-depth ratio over the following ranges of ratios: 10--35, 30--45, and 15--25 for the three bridge types respectively. This finding leads to greater freedom for aesthetic expressions because, compared to conventional values (i.e. 18--23, 22--39, and 16--19), higher ranges of ratios can now be selected without significant cost premiums.
Author: H. G. Russell
Author: H. G. Russell
Author: 
Author: Henry G. Myers
Author: Theresa Marie Ahlborn
Author: 
Author: 
Author: Sandy Shuk-Yan Poon
Author: Theresa M. Ahlborn
Author: Reid Wilson Castrodale
Author: Vellore S. Gopalaratnam