Abstract
The use of elastomeric bearings as high-load bridge bearings for steel and concrete bridges is discussed. The Washington State Department of Transportation's (WSDOT's) experience with high-load multirotational bearings and search for simpler, more durable, and more economical high-load bridge bearings are described. The results of a survey of state departments of transportation indicate that bridge designers have been slow to design elastomeric bearings for the higher stresses permitted by AASHTO Method B. High-load steel-reinforced elastomeric bearings are defined as bearings that are designed for a compressive service stress of 11 MPa (AASHTO Method B maximum) to 15 MPa (German maximum). Design criteria for elastomeric bearings are discussed. A recent WSDOT project is presented. In the case study a four-span continuous curved steel plate bridge is designed for a seismic acceleration coefficient of 0.22 g. At the intermediate piers, high-load steel-reinforced elastomeric bearings are designed for a servi...
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