Bridge Dynamics and Deflections, and Fatigue in Welded Beams
Bridge Dynamics and Deflections, and Fatigue in Welded Beams

Author: National Research Council (U.S.). Highway Research Board

Publisher:

Published: 1962

Total Pages: 80

ISBN-13:

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Paper 1: Results are presented of an analytical study of the dynamic behavior of simple-span highway bridges traversed by heavy vehicles. Paper 2: Inasmuch as many highway bridges are now being built with elastomeric bearings, it was considered desirable to study the vibration effects of such bridges. Paper 3: The method and procedure used in a digital computer program are described to find horizontal and vertical movements of all joints of a truss, given the member stresses and the structure properties. Paper 4: Results are summarized of tests made to demonstrate the effect of details on the fatigue behavior of welded flexural members.

Dynamic Impact Factors for Bridges
Dynamic Impact Factors for Bridges

Author: David I. McLean

Publisher: Transportation Research Board

Published: 1998

Total Pages: 72

ISBN-13: 9780309068192

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This synthesis will be of interest to state department of transportation and consulting bridge, structural, and research engineers. The synthesis describes the current state of the practice for determining dynamic impact factors for bridges. Information for the synthesis was collected by surveying U.S. and Canadian transportation agencies and by conducting a literature search using domestic and foreign sources. This report of the Transportation Research Board documents relevant background and recent information with regard to vehicular dynamic load effects on bridges. It provides details on the basic concepts of bridge dynamics, including identification of the main variables affecting bridge dynamic response. In addition, current code provisions for accounting for vehicular dynamic load effects for new bridge design and load evaluation of existing bridges are reported, including a discussion on the background of the provisions. Finally, a discussion of observed field problems associated with vehicular dynamic load effects, as obtained from the survey, are included.