Fixed restraint devices

Shock transmitters create a very stiff restraint against a dynamic action, while permitting the slow movements of structures, for example those produced by thermal changes without opposing significant resistance. They are used when the structural behaviour should be different for service actions and seismic or dynamic actions. Experimental force-displacement curve of a shock transmitter obtained during high-speed testing. Preparation of tests on a shock transmitter for the Storebælt Bridge (Denmark). Installation of shock transmitters on the Stonecutters Bridge (Hong Kong, China).