Simulation of Cumulative Absolute Velocity Consistent Endurance Time Excitations

ABSTRACT

Endurance time method is a dynamic analysis in which structures are subjected to increasing excitations. These excitations are generated to be compatible with ground motions. Conventional excitation generating processes take into consideration the dynamic characteristics related to intensity and frequency contents of ground motions; however, duration-related characteristics have never been considered directly. In this study, the existing methodology is extended to include Cumulative Absolute Velocity as a duration-related parameter in the generating process. These newly generated excitations are then employed to estimate nonlinear responses of three concrete structures as case studies. Results show sound consistency with incremental dynamic analysis.

KEYWORDS:

• Endurance time method
• cumulative absolute velocity
• time history analysis
• strong ground motion duration
• artificial ground motion