What is seismic response analysis?

Seismic analysis is a subset of structural analysis and is the calculation of the response of a building (or nonbuilding) structure to earthquakes. It later became clear that the dynamic properties of the structure affected the loads generated during an earthquake.

What is elastic response spectra?

Now aseminal concept in earthquake engineering, the elastic response spectrum summarizes the peak response of all possible linear single-degree-of-freedom (SDF) systems to a particular com- ponent of ground motion.

What is response spectrum in Etabs?

Response-spectrum analysis (RSA) is a linear-dynamic statistical analysis method which measures the contribution from each natural mode of vibration to indicate the likely maximum seismic response of an essentially elastic structure.

What is structural response factor?

Explanation: Structural response factor (Sa/g) is the factor denoting the acceleration response spectrum of the structure subjected to earthquake ground vibrations. It depends on natural period of vibration and damping of the structure.

How do you create a response spectrum for earthquakes?

We generate earthquake design spectra by averaging spectra from past earthquakes to design structures to resist earthquakes. For very low periods, the spectral acceleration plot shows essentially a constant range above the ground acceleration line.

What is scale factor in response spectrum in staad?

STAAD will multiply the spectral acceleration or spectral displacement values by the scale factor. Hence, if you provide a normalized acceleration value of 0.5 and a scale factor of 386.4 inch/sq. sec., it has the same effect as providing an un-normalized acceleration value of 193.2 inch/sq. and a scale factor of 1.0.

What is elastic and inelastic response spectra?

The inelastic response spectrum method is a promising approach in aseismic design. It is shown that the design forces can be reduced below those required for the elastic design by a factor of 1.1–15 depending upon the time period of the structure and the desired displacement ductility.