Parameters affecting the seismic response of buildings under bi-directional excitation

Fontara, Ioanna‐Kleoniki; Kostinakis, Konstantinos; Manoukas, Grigorios E.; Athanatopoulou, Asimina

doi:10.12989/sem.2015.53.5.957

Cited by 46 publications

(31 citation statements)

References 17 publications

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“…Notice that, the predominant acceleration acting on a structure will also depend on its azimuthal orientation. This effect has been widely studied focusing on the expected performance and damage in structures and on the seismic hazard [Lagaros, 2010;Mackie et al, 2011;Nguyen and Kim, 2013;Torbol and Shinozuka, 2014;Bradley and Baker, 2015;Fontara et al, 2015;Vargas-Alzate et al, 2018;Pinzón et al, 2018a].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Method for Considering the Directionality Effect of Earthquakes on Structures

Pinzón

Alvarado

Pujades

et al. 2019

Journal of Earthquake Engineering

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An efficient method for considering the directionality effect of earthquakes on structures Recent researches have proven the importance of considering the directionality effect on the expected seismic damage of structures. However, it demands a high computational effort if the nonlinear dynamic analysis (NLDA) is used to estimate the seismic response. This paper presents a simplified approach to obtain peak response parameters for a building subjected to ground motions considering the directionality effect. To do so, the maximum and median response spectra, considering all the non-redundant response spectra, of several ground motion pairs are calculated. Afterwards, a spectral matching technique is applied to these spectra and new acceleration components are obtained. A series of NLDA are performed with these new components and the roof displacement and base shear values are calculated. These results are compared with the maximum and median values, calculated by performing a series of NLDA, after rotating the earthquakes records by considering increments of 1° in the interval 0°-180°. The results agree with both approaches validating the efficiency of the simplified proposed approach.

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Section: Introductionmentioning

confidence: 99%

An Efficient Method for Considering the Directionality Effect of Earthquakes on Structures

Pinzón

Alvarado

Pujades

et al. 2019

Journal of Earthquake Engineering

View full text Add to dashboard Cite

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“…[17][18][19], as well as of the inelastic response and damage level, e.g. [20][21][22][23][24]. In a preliminary study, Fontara et al [25] examined the interrelationship between commonly used seismic intensity measures and the Park and Ang overall structural damage index of an asymmetric 3D single-storey R/C building taking into account several incident angles.…”

Section: Introductionmentioning

confidence: 99%

Correlation between ground motion intensity measures and seismic damage of 3D R/C buildings

Kostinakis

Athanatopoulou

Morfidis

2015

Engineering Structures

115

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“…The lack of specific provisions concerning the axes of the seismic input leads to the application of the horizontal seismic components along the structural axes. This common engineering practice can lead to significant underestimation of seismic damage, as was shown by the studies mentioned before . However, none of these studies evaluated the variation of structural damage response with the excitation angle and, consequently, the degree of underestimation of seismic damage accounting for the influence on the results of various structural systems.…”

Section: Introductionmentioning

confidence: 99%

“…), as well as of the inelastic response and damage level (e.g. ). Despite the significance of the orientation of ground motion, this issue has not attracted till now the attention of many modern seismic guidelines.…”

Section: Introductionmentioning

confidence: 99%

Damage response of multistorey r/c buildings with different structural systems subjected to seismic motion of arbitrary orientation

Kostinakis

Morfidis

Xenidis

2015

Earthq Engng Struct Dyn

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SUMMARYIn the present study the combined influence of seismic orientation and a number of parameters characterizing the structural system of Reinforced Concrete (R/C) buildings on the level of expected damages are examined. For the purposes of the above investigation eight medium-rise buildings are designed on the basis of the current seismic codes. The structural characteristics examined are the ratio of the base shear received by the structural walls, the ratio of horizontal stiffness in two orthogonal directions and the structural eccentricity. Then, the buildings are analyzed by nonlinear time response analysis using 100 bidirectional earthquake ground motions. The two horizontal accelerograms of each ground motion are applied along horizontal orthogonal axes, forming 72 different angles with the structural axes. The structural damage is expressed in terms of the Park and Ang damage index. The results of the analyses revealed that the damage level of the buildings is strongly affected by the incident angle of the ground motion. The extent at which the orientation of the seismic records influences the damage response depends on the structural system and the distance of the record to the fault rupture. As a consequence, the common practice of applying the earthquake records along the structural axes can lead to significant underestimation of structural damage. Also, it was shown that the structural eccentricity can significantly differentiate the seismic damage level, as well as the impact of the earthquake orientation on the structural damage.

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Parameters affecting the seismic response of buildings under bi-directional excitation

Cited by 46 publications

References 17 publications

An Efficient Method for Considering the Directionality Effect of Earthquakes on Structures

An Efficient Method for Considering the Directionality Effect of Earthquakes on Structures

Correlation between ground motion intensity measures and seismic damage of 3D R/C buildings

Damage response of multistorey r/c buildings with different structural systems subjected to seismic motion of arbitrary orientation

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