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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 21 Abstracts search results
Document:
SP59
Date:
January 1, 1979
Author(s):
Editor: James G. MacGregor / Co-Sponsored by: ACI, CEB, PCI, and FIP
Publication:
Symposium Papers
Volume:
59
Abstract:
SP59 As a part of Acl’s recognition of the U.S. Bicentennial in 1976, a special international symposium was held for the express purpose of cross-pollinating U.S. and European ideas of concrete design, with particular reference to the ACI Building Code. The 20 papers presented in this volume were developed from the symposium and follow its format, covering limit states design, shear and torsion, and special concepts and new applications for prestressed concrete.
DOI:
10.14359/14111
SP59-15
T.Y. Lin
Historical development of reinforced, prestressed and partially prestressed concrete is reviewed. Methods and codes for design are discussed, with emphasis on strength and behavior requirements. The use of non-prestressed reinforcement for flexural members, members under combined shear and flexure, combined axial load and flexure are discussed, together with suggested approaches to their design and analysis.
10.14359/17776
SP59-16
Fritz Leonhardt
Experience and some damages in the last 30 years teach that full prestressing is often not the best solution for prestressed concrete structures. Better service performance can be obtained with partial prestressing. Serviceability criteria are proposed to meet performance requirements. Cracks with limited crack width are harmless, but crack width control must be improved and this can be done by partial prestressing. Rules are given for a reasonable choice of the degree of prestressing.
10.14359/17777
SP59-17
P.W. Abeles
A mixed solution of conventional design with pre-tensioned tendons was suggested by F.v.Emperger in many possiblities in 1941. The preferred solution is a design in which the section is in compression under frequently occurring load (which may also be dead load). Another solution relates to avoiding visible cracks under working load. (Limited prestress, Class 2 CEB). The latter was successfully introduced by British Railways in 1948 and in Germany in 1951/53. Very statisfactory fatigue tests were carried out in Liège in 1951. Previously full prestressing, at which only compressive stresses occur, was considered the only satisfactory solution; but according to Leonhardt this is a waste of energy. T.Y. Lin has the greatest practical experience with partial prestressing with his method of load counterbalancing.
10.14359/17778
SP59-18
Ben C. Gerwick, Jr.
Concrete Sea Structures have recently undergone rapid development, especially in the North Sea. Experience with these has shown that a number of aspects require special consideration, due to the character of the environmental forces and magnitude and combinations of loading associated with use in the sea.
10.14359/17779
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