Multiple Presence Reduction Factors for Bridges

by Leslie G. Jaeger, Technical Univ of Nova Scotia, Halifax, NS, Can,
Baidar Bakht, Technical Univ of Nova Scotia, Halifax, NS, Can,

Document Type: Proceeding Paper

Part of: Bridges and Transmission Line Structures


This paper reviews the multiple presence reduction factors specified in the AASHTO and Ontario codes, and provides a method by which these factors can be established in relation to volume of traffic. It is shown that the volume of traffic has a considerable influence on the reduction factors. The paper proposes a set of reduction factors which are applicable to both the AASHTO and Ontario codes; it also presents charts with which realistic estimates of the reduction factor can be obtained for particular bridges and for given densities of traffic.

Subject Headings: Highway bridges | Bridges | Traffic volume | Load factors | Live loads | Standards and codes | Bridge design | Highway and road design | Ontario | Canada

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