What term describes simplifying dynamic loads by treating them as equivalent static loads?

• A. Pseudo-Static Analysis
• B. Energy Dissipation Analysis
• C. Dynamic Finite Element Analysis
• D. Impact Load

Answer: (A)

Treating dynamic loads as equivalent static forces is a way to simplify how the structure responds by using constant forces that mimic the effect of the time-varying action. This approach is called pseudo-static analysis: inertial and damping effects from dynamic actions, such as earthquakes or wind gusts, are represented by static forces applied at the appropriate locations, so a standard static analysis can estimate member forces, moments, and deformations without modeling the full time history. It’s particularly useful for preliminary design or situations where a full dynamic simulation would be too complex or costly. However, it relies on assumed accelerations and simplified force distribution rather than capturing the exact time-dependent behavior of the structure. Other terms describe different ideas: energy dissipation analysis focuses on how structures lose energy through damping, dynamic finite element analysis models the actual time-dependent response, and impact load refers to a sudden, short-duration load rather than a method for converting dynamics to static equivalents.