Momentresistant

Moment resistant, also known as moment resisting or moment resisting frame, refers to a structural system designed to withstand applied bending moments. In structural engineering, a moment is a force that causes a rotation around a point. Moment-resistant connections are a key component of moment-resisting frames. These connections are designed to remain rigid and transfer the bending moments from one structural member to another without significant deformation. This rigidity is crucial for the overall stability and performance of the structure, especially under lateral loads like wind or seismic forces.

Moment-resisting frames are characterized by their ability to resist lateral forces through the flexural stiffness of beams, columns, and their connections. Unlike braced frames, which rely on diagonal members to resist lateral loads, moment-resisting frames depend on the inherent strength and stiffness of their frame members and joints. This can offer advantages in terms of architectural flexibility, as it eliminates the need for diagonal bracing that might obstruct open spaces. However, designing and constructing robust moment-resisting connections can be more complex and costly. The performance of a moment-resisting frame is highly dependent on the ductility of its components, allowing them to deform significantly without fracturing during extreme events.