By Manolis Papadrakakis, Vagelis Plevris, Nikos D. Lagaros
This is the 3rd ebook in a sequence on Computational tools in Earthquake Engineering. the aim of this quantity is to collect the clinical groups of Computational Mechanics and Structural Dynamics, providing a large assurance of well timed concerns on modern Earthquake Engineering.
This quantity will facilitate the trade of rules in subject matters of mutual curiosity and will function a platform for setting up hyperlinks among examine teams with complementary actions. The computational elements are emphasised with a view to tackle tough engineering difficulties of serious social and monetary value.
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Extra info for Computational Methods in Earthquake Engineering: Volume 3
Ha D, Abdoun TH, O’Rourke MJ, Symans MD, O’Rourke TD, Palmer MC, Stewart HE (2010) Earthquake faulting effects on buried pipelines—case history and centrifuge study. J Earthq Eng 14(5):646–669 40. Yun HD, Kyriakides S (1990) On the beam and shell modes of buckling of buried pipelines. Soil Dyn Earthq Eng 9(4):179–193 Determination of the Parameters of the Directivity Pulse Embedded in Near-Fault Ground Motions and Its Effect on Structural Response Petros Mimoglou, Ioannis N. Psycharis and Ioannis M.
Mimoglou et al. It is noticed that Baker  and Zamora and Riddell  have also used similar indices, speciﬁcally the time integral of the squared acceleration  and the time integral of the squared velocity , as intensity measures of the pulse-like content of the ground motion. 2 Determination of the Amplitude, A Let us consider a harmonic ground motion of amplitude dg,max, which is applied as base excitation to an undamped SDOF oscillator. At resonance, the amplitude of the response of the oscillator builds up almost linearly with the number of cycles and for an excitation of c cycles the maximum response is : Sd;0 ðTres Þ ¼ p c dg;max ð8Þ in which Sd,0(Tres) denotes the spectral displacement at resonance for zero damping.
First, the period of the pulse is determined from the peak of the Sd Â Sm product spectrum, a new concept deﬁned as the product of the velocity and the displacement response spectra. The remaining parameters of the M&P wavelet are derived from the targeted response spectrum of the ground motion applying a relationship that is established between the Cumulative Absolute Displacement (CAD) of a wavelet and its peak spectral amplitude. The method follows a well-deﬁned procedure that can be easily implemented in a computer code for the automatic determination of the pulse parameters of a given ground motion.