Research Article
Nov 1977
Superloads on Highway Bridges in Southern Africa
Publication: Journal of the Structural Division
Volume 103, Issue 11
Abstract
By the end of the century some highways in Southern Africa may be required to carry loads of over 1,000 tons. The transporters used to support these loads may have as many as 320 wheels and are therefore very long and wide. Although new bridges will have to be constructed for the heaviest loads, it is possible that many existing structures can support or be strengthened to carry loads of up to about 550 tons gross. Accurate analytical techniques are needed to assess the effects of these superloads on bridges so that every reserve of strength may be utilized. However, the multiplicity of structural configurations, construction materials, and original design specifications prevents development of simple generalized methods. Assessments, involving critical stress, may be made rapidly and precisely using a computerized influence surface technique. The Generate-Simulate-Compare (GSC) system, originally developed for abnormal load investigations, is being extended to assess the effects of future superloads on highway structures.
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Published In
Journal of the Structural Division
Volume 103 • Issue 11 • November 1977
Pages: 2165 - 2179
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Nov 1977
Published online: Feb 1, 2021
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Authors
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Michael A. G. Duncan, M.ASCE
Sr. Chf. Research Officer, National Inst. for Transport and Road Research, Council for Scientific and Industrial Research, Pretoria, Republic of South Africa, South Africa
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.