What is peak ground acceleration used for?
What is peak ground acceleration used for?
Peak ground acceleration provides a measurement of instrumental intensity, that is, ground shaking recorded by seismic instruments. Other intensity scales measure felt intensity, based on eyewitness reports, felt shaking, and observed damage.
What is peak floor acceleration?
Peak horizontal floor acceleration (PHFA) is now widely used by the engineering community for estimating the vulnerability of both attached and unattached acceleration sensitive nonstructural elements.
How do you find peak acceleration?
Solution. Using the fact that the standard acceleration due to gravity, g, is 9.81 m/s2, this answer can be expressed alternatively as: α peak = 1137.0 / 9.81 = 115.9 g .
What is peak spectral acceleration?
What is spectral acceleration (SA)? PGA (peak acceleration) is what is experienced by a particle on the ground, and SA is approximately what is experienced by a building, as modeled by a particle mass on a massless vertical rod having the same natural period of vibration as the building.
How is PGA calculated?
PGA is calculated using attenuation function that describes the correlation between the local ground movement intensity the earthquake magnitude and the distance from the earthquake’s epicentre.
What is peak ground velocity?
In regards to an earthquake, “velocity is how fast a point on the ground is shaking as a result of an earthquake,” and the peak ground velocity is the greatest speed of shaking recorded at particular point during an earthquake. [
How is peak acceleration related to spectral acceleration?
PGA (peak acceleration) is what is experienced by a particle on the ground. SA (spectral acceleration) is approximately what is experienced by a building, as modeled by a particle on a massless vertical rod having the same natural period of vibration as the building.
What is peak ground displacement?
Peak ground velocity (PGV) and peak ground displacement (PGD) are important strong ground motion parameters for correlating with damage caused by an earthquake, for analysis of existing structures and for the design of new structures.
What is SS and S1 in seismic design?
Ss: Spectral acceleration parameter at short periods corresponding to the mapped maximum considered earthquake. S1: Spectral acceleration parameter at a period of 1 sec corresponding to the mapped maximum considered earthquake.
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