Geometric Design of Launched Bridges

Geometric Design of Launched Bridges

11 pages

Regular price $ 20.00 Sale

Incremental launching is a versatile construction method with a wide range of applications. A competitive method for rectilinear bridges only? Not at all…! Limited at first to the construction of bridges with simple geometry, this method has been eventually used in bridges of increasing geometric complexity made of prestressed-concrete, steel, and prestressed composite construction with steel corrugated-plate webs.

In 11 pages, the eManual establishes the geometric criteria for bridge launchability and explores the use of the launch cone for the geometric design of launched bridges.

The eManual discusses the general case of conic launch trajectories and explains how simpler deck geometries can be attained by geometric degeneration of the launch cone. The use of elliptical launch trajectories is thoroughly explained, along with the impacts of crossfall transitions and geometry anomalies in the launch nose. Extensive guidance is also provided for the generation of the most appropriate deck geometry via 3D extrusion with AutoCAD and MicroStation.

  • Introduction
  • Launchable lines
  • The launch cone
  • Crossfall transitions
  • Launch nose alignment
  • References

The structure of chapters will guide you through a progressive learning experience for early familiarity and productivity with the use of the launch cone. You will discover launch trajectories for curved bridges that you would never have thought about…! If you are interested in the design and construction of incrementally launched bridges, you should seriously consider this guide.


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BridgeTech offers books, eManuals, and a rich collection of exclusive articles and free publications on modern bridge design and construction technology. The courses (1 and 2 days) that Dr. Rosignoli teaches for the ASCE Continuing Education Program and on-demand in the offices of bridge owners, designers and constructors are true learning experiences to train bridge teams in industry-driving topics while meeting continuing education objectives. Enjoy our research and development work and the wealth of knowledge, learning and insights that it can bring to your firm, agency and professional career.

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