Earthquake Disaster Control - Damping and Structural Behavior (original) (raw)

According to recent literature on earthquake ground motion and induced waves subject of study for building damage assessment, strong ground motion is subject to the study of movement in near fault and far fault locations as well as integrated to the variability of ground consistency, where natural period variability resides. Ground motion can have large periods as well as short periods dependant on distance from the fault and the impact of elastic deformations in ground soil. This behavior can be attributed to the soil composition and its geological behavior towards ground motion. This is represented by amplitudes which defer from structural amplitudes. Even though a structural behavior can be different from ground motion's natural period oscillation, foundations are calculated in the approximate measure of that period after loss or damping. If both the building and the ground coincide in their movement during an earthquake, the structure will behave in accordance to calculation. Nonetheless, if a structure is calculated for short period and high amplitude ground motion and the actual ground motion takes an opposite direction with long period osccilations and low amplitudes then the structure's flexibility for deformation is tested and its when vibration damage can occur.