Superelasticity-Based Rehabilitation and Post-Tensioning of Bridge Structures

摘要

The technology discussed here uses superelasticity-based systems for repair andstrengthening of bridge structures and also for incorporating unique features for damage control and self-repair into structures. Some key attributes of the system are: (1) efficiency and speed of application; (2) stability and reliability over time under weathering and load effects; (3) damage control under severe load effects; and (4) inherent capability for self-repair. Superelastic alloys are capable of recovering large strains (up to 10%), and can apply large stresses (as high as 700 MPa, 100 ksi) when this strain recovery is constrained.