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The best approach to the seismic problem utilizes our Z-1011 snubbers designed with the proper response to a specific earthquake curve. The Z-1011 series have been tested and rated for stiffness and ultimate capacity. Air gaps between the AASHO bridge-bearing neoprene bushings and the steel housings prevent short circuiting of the isolation provided by the springs. Applications are normally backed up by our computer program as developed by the University of California in Pasadena. The dynamic program accepts the earthquake or bomb blast input and predicts motions and accelerations at the bearings, mechanical service connections and structural attachments. This enables us to maintain specified motion and deceleration levels. The Z-1225 is a simpler design primarily used when only static analysis is required. |
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