What is plastic-hinge?

A plastic hinge is a structural element in a building or bridge designed to bend and deform rather than break under extreme loads. It is typically used in reinforced concrete structures to allow for ductile behavior in the event of an earthquake or other natural disaster.

When a plastic hinge forms in a structure, it indicates that the member has reached its capacity and is experiencing significant stress. This plastic deformation allows the structure to absorb more energy and resist collapse, making it a critical component in the seismic design of buildings and bridges.

Plastic hinges are often located at the ends of beams, columns, or braces, where the most stress is concentrated during a seismic event. These hinges are designed to have sufficient ductility and strength to absorb and dissipate energy, preventing sudden failure and reducing the impact of the earthquake on the overall structure.

Overall, plastic hinges play a crucial role in the resilience and safety of buildings and bridges in seismic-prone regions, allowing them to withstand extreme forces and protect the lives of occupants.