Seismic Hazard in Greece Based on Different Strong Ground Motion Parameters

Koutrakis, S.; Karakaisis, G. F.; Hatzidimitriou, P. M.; Koliopoulos, Panagiotis; Margaris, V.

doi:10.1080/13632460209350411

Cited by 27 publications

(6 citation statements)

References 18 publications

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“…Margaris et al (1990) proposed attenuation relationships for bracketed and significant duration. Koutrakis et al (1999Koutrakis et al ( , 2002 and Koutrakis (2000) proposed attenuation relationships for Greece based on the bracket duration of ground motion. Koutrakis et al (1999Koutrakis et al ( , 2002 and Koutrakis (2000) proposed attenuation relationships for Greece based on the bracket duration of ground motion.…”

Section: Introductionmentioning

confidence: 99%

Engineering Ground-Motion Parameters Attenuation Relationships for Greece

Danciu¹,

Tselentis²

2007

Bulletin of the Seismological Society of America

148

111

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Engineering ground-motion parameters can be used to describe the damage potential of an earthquake. Some of them correlate well with several commonly used demand measures of structural performance, liquefaction, and seismic-slope stability. The importance of these parameters comes from the necessity of an alternative measure to the earthquake intensity. In the proposed new attenuation relationship we consider peak values of strong motion, spectral acceleration, elastic input energy at selected frequencies, root-mean-square acceleration, Arias intensity, characteristic intensity, Fajfar index, cumulative absolute velocity, cumulative absolute velocity integrated with a 5 cm/sec 2 lower threshold, and spectrum-intensity energy. This article describes the steps involved in the development of new attenuation relationships for all the preceding parameters, using all existing, up-to-date Greek strong-motion data. The functional form of the empirical equation is selected based on a theoretical model, and the coefficients of the independent variables are determined by employing mixed effects regression analysis methodologies.

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Section: Introductionmentioning

confidence: 99%

Engineering Ground-Motion Parameters Attenuation Relationships for Greece

Danciu¹,

Tselentis²

2007

Bulletin of the Seismological Society of America

148

111

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“…Perhaps, the simplest metric is the so called bracketed duration defined as the total time elapsed between the first and last excursion of a specified level of acceleration αo. In this section, the duration ts,0.02 is used, which is based on αo = 0.02 g. The anticipated ts,0.02 is directly estimated for the earthquake scenario under investigation (Mw = 6.2 and R = 20 km) by using attenuation relationships such as the one proposed by Koutrakis et al [56] for the case of Greece. Using this relationship, it is found that the expected ts,0.02 is approximately 9.5 s. To consider the anticipated duration in the selection of GMs, it is set as one of the two selection objectives to minimize the error ets of the 0.02 g bracketed duration of the individual GMs with respect to the target duration ts,trg = 9.5 s. Fig.…”

Section: Strong Motion Intensity and Duration Parametersmentioning

confidence: 99%

Selection of earthquake ground motions for multiple objectives using genetic algorithms

Mergos

Sextos

2019

Engineering Structures

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Existing earthquake ground motion (GM) selection methods for the seismic assessment of structural systems focus on spectral compatibility in terms of either only central values or both central values and variability. In this way, important selection criteria related to the seismology of the region, local soil conditions, strong GM intensity and duration as well as the magnitude of scale factors are considered only indirectly by setting them as constraints in the pre-processing phase in the form of permissible ranges. In this study, a novel framework for the optimum selection of earthquake GMs is presented, where the aforementioned criteria are treated explicitly as selection objectives. The framework is based on the principles of multi-objective optimization that is addressed with the aid of the Weighted Sum Method, which supports decision making both in the preprocessing and post-processing phase of the GM selection procedure. The solution of the derived equivalent single-objective optimization problem is performed by the application of a mixed-integer Genetic Algorithm and the effects of its parameters on the efficiency of the selection procedure are investigated. Application of the proposed framework shows that it is able to track GM sets that not only provide excellent spectral matching but they are also able to simultaneously consider more explicitly a set of additional criteria.

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“…Recognizing the importance of beamcolumn joints as part of the seismic-force-resisting system in concrete frame buildings, many researchers, beginning with Hanson and Connor (1967), have conducted studies of joint behavior. Since that seminal work, many laboratory and analytical studies on beam-column joints without transverse reinforcement have been reported (Uzumeri 1977, Beres et al 1992, Priestley and Hart 1994, Clyde et al 2000, Hakuto et al 2000, Walker 2001, Calvi et al 2002a, Calvi et al 2002b, Pampanin et al 2003, Gencoglu and Eren 2002, Ghobarah and Said 2002, Pantelides et al 2002a, Pantelides et al 2002b, Pantelides et al 2008, Antonopulos and Triantafillou 2003, Woo 2003, Wong 2005, Engindeniz et al 2008, Bedirhanoglu et al 2010, Akguzel 2011. Partial collapse of Kaiser-Permanente Building, 1994 Northridge earthquake (data from National Information Service for Earthquake Engineering).…”

Section: Prior Studiesmentioning

confidence: 99%

Seismic Response of a Concrete Frame with Weak Beam-Column Joints

et al. 2015

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A reduced-scale, planar, two-story by two-bay reinforced concrete frame with weak beam-column joints was subjected to earthquake simulations on a shaking table. The beam-column joints did not contain transverse reinforcement, as is typical in older construction designed without attention to detail for ductile response. A series of linear and nonlinear analytical models of the frame were developed in accordance with American Society of Civil Engineers standards and subjected to the input base motions. The goodness of fit between analytical and measured results depended on the details of the analytical model. Reasonably accurate reproduction of the measured response was obtained only by modeling the inelastic responses of both columns and beam-column joints. The results confirm the importance of modeling nonlinear joint behavior in older concrete buildings with deficient beam-column joints.

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Seismic Hazard in Greece Based on Different Strong Ground Motion Parameters

Cited by 27 publications

References 18 publications

Engineering Ground-Motion Parameters Attenuation Relationships for Greece

Engineering Ground-Motion Parameters Attenuation Relationships for Greece

Selection of earthquake ground motions for multiple objectives using genetic algorithms

Seismic Response of a Concrete Frame with Weak Beam-Column Joints

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