Ground-motion prediction equations (GMPEs) for inelastic response and structural behaviour factors

Rupakhety, Rajesh; Sigbjörnsson, Ragnar

doi:10.1007/s10518-009-9105-x

Cited by 22 publications

(21 citation statements)

References 24 publications

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“…The seismic activity in this zone is characterized by shallow, moderate to strong, strike-slip earthquakes. The fault planes of the largest earthquakes are, in all cases, close to vertical and the rupture propagates to the surface in most cases (Sigbjörnsson et al 2008;Rupakhety and Sigbjörnsson 2009). The strong-motion records used in this work are obtained from South Iceland, but are augmented by data from continental Europe and the Middle East.…”

Section: Data Appliedmentioning

confidence: 86%

“…Therefore we believe that the mass-normalized yield strength, C y , provides a better representation of oscillator strength, especially, because it depends solely on the properties of the system and can be estimated, in practical applications, through static pushover analysis. This explains the difference of the proposed constant-strength model for structural performance evaluation, from an earlier constant-ductility model (Rupakhety and Sigbjörnsson 2009), which was indented for designing structures for a specified target ductility.…”

Section: Introductionmentioning

confidence: 88%

“…A list of ground motion records, the details of their processing and correction procedure, site class identification, building types, etc. can be found in Rupakhety and Sigbjörnsson (2009).…”

Section: Data Appliedmentioning

confidence: 99%

“…Such simplification may result in inaccurate estimation of seismic design forces. To overcome this shortcoming, Ground-Motion Prediction Equations (GMPEs) have been proposed to compute inelastic design spectra, without resorting first to elastic response spectra (Rupakhety and Sigbjörnsson 2009). Such equations, when incorporated into the framework of probabilistic seismic hazard assessment (PSHA), are useful in constructing uniform-hazard inelastic (design) spectra.…”

Section: Introductionmentioning

confidence: 99%

“…In the proposed model, magnitude dependence is implicit as magnitude is one of the independent parameters of the model. Most of the empirical models mentioned above are based on response of constant-ductility oscillators which is useful for specifying design forces (Rupakhety and Sigbjörnsson 2009). On the other hand, the goal behind seismic evaluation and/or design verification is not to achieve a specified level of ductility but rather to evaluate the ductility demand of oscillators with given strength, stiffness and energy dissipation properties.…”

Section: Introductionmentioning

confidence: 99%

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Ground-Motion Prediction Equations (GMPEs) for inelastic displacement and ductility demands of constant-strength SDOF systems

Rupakhety

Sigbjörnsson

2009

Bull Earthquake Eng

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The objective of this paper is to present ground-motion prediction equations for ductility demand and inelastic spectral displacement of constant-strength perfectly elastoplastic single-degree-of-freedom (SDOF) oscillators. Empirical equations have been developed to compute the ductility demand as a function of two earthquake parameters; moment magnitude, and source-to-site distance; one site parameter, the ground type; and three oscillator parameters, an undamped natural period, critical damping ratio, and the mass-normalized yield strength. In addition, a comparative study of the proposed model with selected previous studies and recommendations of Eurocode 8 is presented. Proposed equations can easily be incorporated in existing probabilistic seismic hazard analysis (PSHA) software packages with the introduction of an additional parameter. This leads to hazard curves for inelastic spectral displacement, which can provide better estimates of target displacement for nonlinear static procedures and an efficient intensity measure for probabilistic seismic demand analysis (PSDA). Proposed equations will be useful in performance evaluation of existing structures.

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Section: Data Appliedmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 88%

Section: Data Appliedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ground-Motion Prediction Equations (GMPEs) for inelastic displacement and ductility demands of constant-strength SDOF systems

Rupakhety

Sigbjörnsson

2009

Bull Earthquake Eng

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Evaluation of a recently proposed record selection and scaling procedure for low‐rise to mid‐rise reinforced concrete buildings and its use for probabilistic risk assessment studies

Akkar

2013

Earthq Engng Struct Dyn

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SUMMARY This paper evaluates a recent record selection and scaling procedure of the authors that can determine the probabilistic structural response of buildings behaving either in the elastic or post‐elastic range. This feature marks a significant strength on the procedure as the probabilistic structural response distribution conveys important information on probability‐based damage assessment. The paper presents case studies that show the utilization of the proposed record selection and scaling procedure as a tool for the estimation of damage states and derivation of site‐specific and region‐specific fragility functions. The method can be used to describe exceedance probabilities of damage limits under a certain target hazard level with known annual exceedance rate (via probabilistic seismic hazard assessment). Thus, the resulting fragility models can relate the seismicity of the region (or a site) with the resulting building performance in a more accurate manner. Under this context, this simple and computationally efficient record selection and scaling procedure can be benefitted significantly by probability‐based risk assessment methods that have started to be considered as indispensable for developing robust earthquake loss models. Copyright © 2013 John Wiley & Sons, Ltd.

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Risk‐targeted importance factors for prescriptive seismic design of critical buildings

Badal

Sinha

2023

Earthq Engng Struct Dyn

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The post‐earthquake recovery of a community depends on the ability of important buildings to perform their functions. Lifeline and other critical buildings that meet a predictable enhanced seismic performance increase the community's disaster risk management capacity. In prescriptive force‐based design standards, the seismic design force for these buildings is typically enhanced using an importance factor depending on the risk category. The present paper proposes an innovative framework based on performance‐based seismic design (PBSD) principles using risk‐targeted importance factors suitable for use with prescriptive standards. The framework decouples probabilistic assessments of building typologies to experts, while the structural designers can continue the conventional design approach. The framework explicitly considers probabilistic seismic demand, uncertainty in the performance of the building, and the inter‐building variation within a particular building typology in seismic performance. Six special reinforced concrete (RC) frame buildings conforming to Indian standards are selected to illustrate the framework. Sensitivity studies on parameter selection are used to establish the framework's robustness. An expression for the importance factors is also proposed. The use of the proposed importance factor expression is shown to meet a wide range of risk targets corresponding to different performance levels. The paper also proposes design factors for enhanced performance objectives suitable for the risk‐targeted prescriptive design. Further, the framework is implemented to estimate the seismic risk associated with existing building typology conforming to prevalent design standards. The assembly‐ and critical‐category RC buildings are found to require higher importance factors for achieving enhanced performance objectives than currently prescribed.

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Ground-motion prediction equations (GMPEs) for inelastic response and structural behaviour factors

Cited by 22 publications

References 24 publications

Ground-Motion Prediction Equations (GMPEs) for inelastic displacement and ductility demands of constant-strength SDOF systems

Ground-Motion Prediction Equations (GMPEs) for inelastic displacement and ductility demands of constant-strength SDOF systems

Evaluation of a recently proposed record selection and scaling procedure for low‐rise to mid‐rise reinforced concrete buildings and its use for probabilistic risk assessment studies

Risk‐targeted importance factors for prescriptive seismic design of critical buildings

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