Optimization of Span-to-depth Ratios in High-strength Concrete Girder Bridges PDF Download
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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: 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 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: Maher K. Tadros Publisher: Transportation Research Board ISBN: 030908766X Category : Technology & Engineering Languages : en Pages : 73
Book Description
"The HCM includes three printed volumes (Volumes 1-3) that can be purchased from the Transportation Research Board in print and electronic formats. Volume 4 is a free online resource that supports the rest of the manual. It includes: Supplemental chapters 25-38, providing additional details of the methodologies described in the Volume 1-3 chapters, example problems, and other resources; A technical reference library providing access to a significant portion of the research supporting HCM methods; Two applications guides demonstrating how the HCM can be applied to planning-level analysis and a variety of traffic operations applications; Interpretations, updates, and errata for the HCM (as they are developed);A discussion forum allowing HCM users to ask questions and collaborate on HCM-related matters; and Notifications of chapter updates, active discussions, and more via an optional e-mail notification feature."--Publisher.
Author: Manish Shrikhande Publisher: Springer Nature ISBN: 9819915791 Category : Science Languages : en Pages : 763
Book Description
This book presents select proceedings of the 17th Symposium on Earthquake Engineering organized by the Department of Earthquake Engineering, Indian Institute of Technology Roorkee. The topics covered in the proceedings include engineering seismology and seismotectonics, earthquake hazard assessment, seismic microzonation and urban planning, dynamic properties of soils and ground response, ground improvement techniques for seismic hazards, computational soil dynamics, dynamic soil–structure interaction, codal provisions on earthquake-resistant design, seismic evaluation and retrofitting of structures, earthquake disaster mitigation and management, and many more. This book also discusses relevant issues related to earthquakes, such as human response and socioeconomic matters, post-earthquake rehabilitation, earthquake engineering education, public awareness, participation and enforcement of building safety laws, and earthquake prediction and early warning system. This book is a valuable reference for researchers and professionals working in the area of earthquake engineering.
Author: Sandy Shuk-Yan Poon
Author: Sandy Shuk-Yan Poon
Author: H. G. Russell
Author: 
Author: Reid Wilson Castrodale
Author: Justin Counts
Author: Maher K. Tadros
Author: Genís Concha Farré
Author: Manish Shrikhande
Author: Hesson Park
Author: Henry G. Myers