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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 9 Abstracts search results

Document: 

SP110-06

Date: 

November 1, 1988

Author(s):

Alex C. Scordelis

Publication:

Symposium Papers

Volume:

110

Abstract:

The state of the art for the analysis and design of hyperbolic parabolic (HP) shells is reviewed. The necessary expressions for determining the internal membrane stresses in the shell and the internal axial forces, shears, and bending moments in the groin arch due to surface dead and live loads on the shell are given. A special-purpose computer program GROINV, for the membrane analysis of HP groined vaults with a minimum of input data, is briefly described. The program is available from the author. Numerical results for several groined vaults with varying amounts of curved shell overhang are presented and their structural behavior with respect to concrete and reinforcing steel requirements is compared. Recent developments in the nonlinear finite element analysis of reinforced concrete shells that account for membrane and bending actions are reviewed, and results obtained for HP groined vaults loaded to ultimate failure using computer programs developed at Berkeley are briefly described with respect to their design implications.

DOI:

10.14359/2823

Document: 

SP110-08

Date: 

November 1, 1988

Author(s):

Milo S. Ketchum

Publication:

Symposium Papers

Volume:

110

Abstract:

Construction of hyperbolic paraboloidal concrete shell roof structures is discussed, including the phases for selection, economy, forms, reinforcing, concrete materials, placing, and curing. Umbrella shells have the greatest potential for economy for large commercial or industrial construction. Gabled shells and saddle shells are suited to long span monumental buildings. Shells require high standards of concrete construction and the close cooperation of the architect, the engineer, and the contractor.

DOI:

10.14359/3420

Document: 

SP110-07

Date: 

November 1, 1988

Author(s):

Jack Christiansen

Publication:

Symposium Papers

Volume:

110

Abstract:

The performance of hyperbolic paraboloid concrete shell structures with respect to function, strength, serviceability, and economy is discussed. Cost estimates are presented for three example roof structures.

DOI:

10.14359/3612

Document: 

SP110

Date: 

November 1, 1988

Author(s):

Editor: Jack Christiansen

Publication:

Symposium Papers

Volume:

110

Abstract:

SP110 Offering both utility and beauty, the hyperbolic paraboloid (HP) shell came to the attention of American designers in the early 1950's. Since that time, many hyperbolic paraboloid structures have been built both in the United States and around the world. This state-of-the-art report on hyperbolic paraboloids is the culmination of over ten years of research and fact gathering. Effort has been devoted to developing analysis and design data and techniques for hyperbolic paraboloid concrete shells, especially for umbrella, gable and saddle shells. "Hyperbolic Paraboloid Shells" offers the latest information on topics such as: bending theory, saddle shells, hyperbolic paraboloid performance and cost, groined vaults, membrane analysis and construction.

DOI:

10.14359/14143

Document: 

SP110-02

Date: 

November 1, 1988

Author(s):

A;lex C. Scordelis

Publication:

Symposium Papers

Volume:

110

Abstract:

A review of the state of the art for the membrane analysis of hyperbolic parabolic (HP) shells is presented. Membrane solutions using simple statics are given for HP shells having square, rectangular, or parallelogram shapes in plan and subjected only to uniform vertical loading over the horizontal projection of the shell. Statics of shell-edge beam systems are discussed for saddle shells, inverted umbrellas, gable shells, and shells on two supports. Membrane stresses for general loadings on parallelogram-shaped HP shells obtained using a differential equation approach are described. Stress transformation formulas are given that can be used to find principal membrane stresses in the shell and boundary stresses to be transmitted to the edge members. Membrane stresses in HP shells having an arbitrary quadrilateral shape are discussed and procedures for determining them are discussed.

DOI:

10.14359/2798

12

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