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International Concrete Abstracts Portal

Showing 1-5 of 45 Abstracts search results

Document: 

SP26-04

Date: 

January 1, 1971

Author(s):

G.C. Nayak and J.D. Davies

Publication:

Symposium Papers

Volume:

26

Abstract:

The paper describes a numerical method for the direct determination of influence fields or surfaces for the generalized stress resultants in slab bridges.

DOI:

10.14359/17973


Document: 

SP26-03

Date: 

January 1, 1971

Author(s):

Pradyot K. Niyogi, Haresh C. Shah, Kishore D. Doshi, and Wilson Tang

Publication:

Symposium Papers

Volume:

26

Abstract:

This paper presents an important aspect of the structural design of concrete bridges under various combinations of loading. 'Load Factors', which are quantities used to define the pattern and magnitude of design loadings, are evaluated from a statisitcal point of view in such a manner as to assure a desired level of safety for the structure.

DOI:

10.14359/17972


Document: 

SP26-02

Date: 

January 1, 1971

Author(s):

K.S. Rajagopalan

Publication:

Symposium Papers

Volume:

26

Abstract:

Design live loads for major bridges in eighteen countries are compared by studying their effects on simple spans of 30 to 140 ft. (9 to 42 meters nominal). A very wide diversity in the design load effects such as maximum bending moments and shear forces is noted--the heaviest effect being about two and one-half times that of the lightest. This wide diversity cannot be easilty justified by the normal volumes of traffic loads in these countries. It is hoped a more uniform design load, if specified, will result in economy in some countries and perhaps greater safety in others.

DOI:

10.14359/17971


Document: 

SP26-01

Date: 

January 1, 1971

Author(s):

Alfio Seni

Publication:

Symposium Papers

Volume:

26

Abstract:

The author first discusses the advantages resulting from having all Live Load Specifications approved and enacted by a State Adminstration, prior to their publications. . .In conclusion, the author suggests that North American specifications for Highway Bridge Loadings should be revised.

DOI:

10.14359/17970


Document: 

SP26-10

Date: 

January 1, 1971

Author(s):

Jacob Shimoni

Publication:

Symposium Papers

Volume:

26

Abstract:

Skew bridge decks, and especially those made of prestressed concrete, are subject to longitudinal and transversal displacements and horizontal rotations due to external forcese resulting from: (a) Longitudinal braking and earthquake forces, (b) Transversal wind, earthquake and centrifugal forces, (c) Shortening of deck due to shrinkage, variation of temperature and prestressing forces.

DOI:

10.14359/17979


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