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Showing 1-5 of 11 Abstracts search results

Document: 

SP183-01

Date: 

May 1, 1999

Author(s):

S. Simmonds

Publication:

Symposium Papers

Volume:

183

Abstract:

The justification for using elastic frame analogies to determine design moments in two-way slab systems is discussed. A brief history of two-way reinforced concrete slab design leading to the current code procedures is presented. This history includes a description of the various elastic frame analogies that have existed in past codes, the reasons for changes and the research leading to improved frame analogies. This is followed by a critical review of the Equivalent Frame Method in the current code with suggestions for improving and simplifying provisions for elastic frame analogies in future codes.

DOI:

10.14359/5531


Document: 

SP183-09

Date: 

May 1, 1999

Author(s):

A. Scanlon

Publication:

Symposium Papers

Volume:

183

Abstract:

Deflection control for two-way slab systems requires attention to both design and construction requirements. This paper discusses both aspects and provides a design example to illustrate how construction loads, cracking and time-dependent effects can be accounted for in slab deflection calculations.

DOI:

10.14359/5539


Document: 

SP183-06

Date: 

May 1, 1999

Author(s):

S. Alexander

Publication:

Symposium Papers

Volume:

183

Abstract:

Hillerborg's strip method of design (1, 2) is a powerful and versatile technique for designing two-way reinforced concrete slabs and plates. The method is based on the lower bound theorem of plasticity, meaning that a design based on the strip method is always safe. The purpose of this paper is to provide an overview of the strip method, including design examples. The strip method is usually divided into tow parts. The simple strip method is used to design edge supported slabs. Many designers will recognize this as an application of the strong-band concept. The advanced strip method is used to design slabs with column supports or reentrant edge supports.

DOI:

10.14359/5536


Document: 

SP183

Date: 

May 1, 1999

Author(s):

Editor: T.C. Schaeffer / Sponsored by: Joint ACI-ASCE Committee 421

Publication:

Symposium Papers

Volume:

183

Abstract:

This Symposium Publication consists of 10 papers that give the designer an overview of some of the different analysis and design techniques currently being used. Note: The individual papers are also available as .pdf downloads.. Please click on the following link to view the papers available, or call 248.848.3800 to order. SP183

DOI:

10.14359/14176


Document: 

SP183-04

Date: 

May 1, 1999

Author(s):

W. Gamble

Publication:

Symposium Papers

Volume:

183

Abstract:

The yield line theory for the determination of the ultimate load for slab structures is a well documented method of analysis. The basics of the method, which can be implemented using either equations of equilibrium or virtual work equations, are briefly reviewed, using a rectangular panel with all edges supported. A more complex single panel is then considered, followed by a brief review of multi-panel failure mechanisms. The potential importance of in-place forces, both compression and tension, is noted. These forces, which can be thought of in arch or dome terms for compression and catenaries for tension, have led to slab failure loads much greater than can be explained on the basis of flexure alone in many test. This phase of behavior is seldom usable for normal design of civil structures, but may be very useful and helpful in trying to understand the behavior of and design structures to resist blast loadings.

DOI:

10.14359/5534


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