Accelerographic measurements of the 27 February 2010 offshore Maule, Chile earthquake

Saragoni, Gilles; Lew, Marshall; Naeim, Farzad; Carpenter, Lauren D.; Youssef, Nabih; Rojas, Fabián; Adaros, Macarena Schachter

doi:10.1002/tal.673

Cited by 11 publications

(7 citation statements)

References 5 publications

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“…Box 9140, Boulder, CO 80301, USA. ing the last 2010 M w 8.8 Maule megathrust rupture (Saragoni et al, 2010). However, all those values should be considered as lower estimates because they do not incorporate possible effects of basin topography or earthquake directivity.…”

Section: Earthquake Estimates and Implications For Seismic Hazardmentioning

confidence: 99%

Probing large intraplate earthquakes at the west flank of the Andes

Vargas

Klinger

Rockwell

et al. 2014

Geology

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International audienceEstimating the potential for the occurrence of large earthquakes on slow-slip-rate faults in continental interiors, away from plate boundaries, is possible only if the long-term geological record of past events is available. However, our knowledge of strong earthquakes appears to be incomplete for thrust faults flanking large actively growing mountain ranges, such as those surrounding Tibet and the Andes Mountains. We present a paleoseismic study of a prominent fault scarp at the west flank of the Andes in Santiago, Chile. The evidence demonstrates recurrent faulting with displacement of ~5 m in each event. With two large earthquake ruptures within the past 17–19 k.y., and the last event occurring ~8 k.y. ago, the fault appears to be ripe for another large earthquake (moment magnitude, M w 7.5). These results emphasize the potential danger of intraplate continental faults, particularly those associated with youthful mountain fronts

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Section: Earthquake Estimates and Implications For Seismic Hazardmentioning

confidence: 99%

Probing large intraplate earthquakes at the west flank of the Andes

Vargas

Klinger

Rockwell

et al. 2014

Geology

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“…Near‐fault ground motion records may contain high amplitude acceleration, velocity, and displacement pulses . High amplitude low frequency pulses are contained in far field ground motions affected mostly by site effects . The waveform, predominant period, and amplitude of the pulses determine the motion's damage potential for different structures .…”

Section: Near‐fault Ground Motions and Their Closed‐form Representationmentioning

confidence: 99%

“…">NEAR-FAULT GROUND MOTIONS AND THEIR CLOSED-FORM REPRESENTATIONNear-fault ground motion records may contain high amplitude acceleration, velocity, and displacement pulses [35]. High amplitude low frequency pulses are contained in far field ground motions affected mostly by site effects [36,37]. The waveform, predominant period, and amplitude of the pulses 1302 V. CALUGARU AND M. PANAGIOTOU Figure 10.…”

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confidence: 99%

Response of tall cantilever wall buildings to strong pulse type seismic excitation

Calugaru

Panagiotou

2011

Earthq Engng Struct Dyn

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SUMMARY This paper investigates the seismic response of tall cantilever wall buildings subjected to pulse type ground motion, with special focus on the relation between the characteristics of ground motion and the higher‐modes of response. Buildings 10, 20, and 40 stories high were designed such that inelastic deformation was concentrated at a single flexural plastic hinge at their base. Using nonlinear response history analysis, the buildings were subjected to near‐fault seismic ground motions and simple closed‐form pulses, which represented distinct pulses within the ground motions. Euler–Bernoulli beam models with lumped mass and lumped plasticity were used to model the buildings. The response of the buildings to the closed‐form pulses fairly matched that of the near‐fault records. Subsequently, a parametric study was conducted for the buildings subjected to three types of closed‐form pulses with a broad range of periods and amplitudes. The results of the parametric study demonstrate the importance of the ratio of the fundamental period of the structure to the period of the pulse to the excitation of higher modes. The study shows that if the modal response spectrum analysis approach is used — considering the first four modes with a uniform yield reduction factor for all modes, and with the square root of sum of squares modal combination rule — it significantly underestimates bending moment and shear force responses. A response spectrum analysis method that uses different yield reduction factors for the first and the higher modes is presented. Copyright © 2011 John Wiley & Sons, Ltd.

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“…The 27 February 2010 Maule (Chile) earthquake suggested that the proximity to fault asperities can control structural failures, because the most damaged cities in Chile were close to two identified asperities [12]. The 11 March 2011 Tohoku (Japan) earthquake has reinforced the idea that strong effects due to local asperities, cause significant variability of ground motion parameters at short rupture distances and similar site conditions [13].…”

Section: Earthquake Source Characteristicsmentioning

confidence: 99%