Details

Autor(en) / Beteiligte

• Khansefid, Ali

Titel

Pulse-like ground motions: Statistical characteristics, and GMPE development for the Iranian Plateau

Ist Teil von

• Soil dynamics and earthquake engineering (1984), 2020-07, Vol.134, p.106164, Article 106164

Ort / Verlag

Barking: Elsevier Ltd

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This research attempts to study the pulse-like ground motions, recorded on the Iranian plateau, and propose predictive equations for simulating the main features of this type of signal. In this regard, firstly, the statistical characteristics of pulse-like records of the Iranian database, containing 770 events and 1206 accelerograms, are statistically investigated. The probability density function of facing a pulse-like signal, for a given location, is obtained, and the main features of acceleration and velocity spectra of these signals are evaluated for the horizontal and vertical directions. Interestingly, the mean value of vertical to horizontal ratio of spectral acceleration of signals reaches above one in many cases. In the next part, a set of ground motion prediction equations are presented for simulating the major properties of velocity pulse itself, including the amplitude, period, and the occurrence time during the recorded time series. Besides to these equations, another set of GMPEs is proposed for generating the 5% damped spectral acceleration of the horizontal and vertical pulse-like ground motions simultaneously considering their component's correlation. These newly developed equations are compared and validated with the existing GMPEs of the Iranian plateau. All of the suggested equations are applicable for the magnitude between 4.0 and 6.5, the site-to-source distance of 2 km–100 km, the focal depth of 2–40 km, and the shear wave velocity of underlying soil varying between 200 m/s to 900 m/s. •Proposing a database of pulse-like database recorded in the Iranian plateau.•Extensive statistical analysis on the pulse-like near-field signals recorded on the Iranian plateau.•Presentation of the probabilistic model for the occurrence of forward directivity velocity pulse in a given location.•Proposing new GMPEs for the spectral accelerations of pulse-like signals in both vertical and horizontal directions.•Proposing new GMPEs for the velocity pulse of pulse-like signals in both vertical and horizontal directions.