Prestressed Concrete Shell Fpr Grandstand Roofs


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Title: Prestressed Concrete Shell Fpr Grandstand Roofs

Author(s): Henry M. Layne and T. Y. Lin

Publication: Journal Proceedings

Volume: 56

Issue: 11

Appears on pages(s): 409-422

Keywords: none

Date: 11/1/1959

Discusses in general terms the design, construction, per-formance, and economy of cantilevered prestressed thin shells which form the roof over the three main grandstands of Venezuela’s new National Race Track in Caracas. The prestressed shells, which constitute the roof, are 100 ft above the ground floor and extend 90 ft from their supporting columns. The design of the roof, after first attempting a rigorous mathematical analysis, was based on the assumption that prestressing had transformed the shells into horizontal columns with no bending. Prestressing practically eliminated cracks and deflections and reduced the shell thickness to 3 in. Further information on the performance and design are given along with the method and manner of prestressing and a comparative cost estimate between the design and one using only ordinary reinforcement