Reaction

Definition

In structures, a reaction is the response of the structure to the loads. It usually refers to the components of force developed at the supports, acting at the support of a structure.

Purpose

The purpose of a reaction is to describe the forces that develop at the supports or connections of a structure due to applied loads, ensuring that the structure remains stable and balanced.

Examples of Use

• In beam design, reactions at the supports are calculated to determine the load distribution and necessary support strength.
• Structural engineers analyze reactions in trusses to ensure the stability and safety of bridges and buildings.
• Reactions are considered in foundation design to ensure the soil and support structures can handle the applied loads.

Related Terms

• Load: The weight or force applied to a structure.
• Support: The points at which a structure is held up or anchored.
• Moment: The tendency of a force to rotate an object about an axis or pivot.

Notes

Accurate calculation of reactions is essential for the safe design and construction of structures, ensuring that all loads are properly supported and distributed.