Transcription of WisDOT Bridge Manual Chapter 27 – Bearings
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WisDOT Bridge Manual Chapter 27 – Bearings
WisDOT Bridge Manual Chapter 27 Bearings July 2019 27-1 Table of Contents General .. 2 Bearing Types .. 3 Elastomeric Bearings .. 4 Steel Bearings .. 11 Type "A" Fixed Bearings .. 11 Type "A-T" Expansion Bearings .. 12 High-Load Multi-Rotational Bearings .. 12 Hold Down Devices .. 18 design Example .. 19 WisDOT Bridge Manual Chapter 27 Bearings July 2019 27-2 General Bridges supported in the conventional way by abutments and piers require Bearings to transfer girder reactions without overstressing the supports, ensuring that the Bridge functions as intended. Bridges usually require Bearings that are more elaborate than those required for building columns, girders and trusses.
The required design input for the design of an elastomeric bearing at the service limit state is dead load, live load plus dynamic load allowance, minimum vertical force due to permanent load, and design translation. The required design input at the strength limit state is shear force. Other required design input is expansion length, girder or
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