Comparison of Nonlinear Static Methods for the Seismic Assessment of Plan Irregular Frame Buildings with Non Seismic Details

Bhatt, Carlos; Bento, Rita

doi:10.1080/13632469.2011.586085

Cited by 34 publications

(14 citation statements)

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“…Such behavior has also been observed in the work of Pinho et al . and Bhatt and Bento , where various NSPs were analyzed for a set of structures by using increasing levels of ground motion intensity. Higher displacement demands lead to a higher number of frames being assigned to collapse when using the NSPs, leading to a higher probability of exceeding limit state 3.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Evaluation of analytical methodologies used to derive vulnerability functions

Silva

Crowley

Varum

et al. 2013

Earthq Engng Struct Dyn

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The recognition of fragility and vulnerability functions as a fundamental tool in seismic risk assessment has led to the development of more and more complex and elaborate procedures for their computation. Although these functions have been traditionally produced using observed damage and loss data, more recent studies propose the employment of analytical methodologies as a way to overcome the frequent lack of post-earthquake data. The variation of the structural modelling approach on the estimation of building capacity has been the target of many studies in the past; however, its influence on the resulting vulnerability model for classes of buildings, the impact in loss estimations or propagation of the uncertainty to the seismic risk calculations has so far been the object of limited scrutiny. In this paper, an extensive study of static and dynamic procedures for estimating the nonlinear response of buildings has been carried out to evaluate the impact of the chosen methodology on the resulting capacity, fragility, vulnerability and risk outputs. Moreover, the computational effort and numerical stability provided by each approach have been evaluated and conclusions drawn regarding the optimal balance between accuracy and complexity.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Evaluation of analytical methodologies used to derive vulnerability functions

Silva

Crowley

Varum

et al. 2013

Earthq Engng Struct Dyn

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“…The application of the N2 method was extended to bridges [11] and base-isolated structures [24][25][26]. In addition, the extended N2 method for asymmetric buildings was rigorously tested on a set of existing real-life buildings [10,27]. Key results obtained in these studies are summarized in later sections of this paper.…”

Section: Development Of N2 Methodsmentioning

confidence: 99%

N2 building design method

2018

JCE

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N2 building design methodThe N2 method is a fast nonlinear static method for the seismic design of buildings. This paper presents main properties and limitations of the method, its development over time, and possibilities of its application for different types of buildings. Differences between the traditional N2 method and its extensions are highlighted. Comparison of the N2 method with similar design approaches is also provided. The results obtained by calculations based on the N2 method are found to be in good agreement with the results obtained by much more complex methods. Guidelines for further research are given in the final part of the paper.Metoda N2 za projektiranje zgrada N2 je brza nelinearna statička metoda za projektiranje zgrada otpornih na potres. Rad predstavlja značajke i ograničenja metode, njezin razvoj te mogućnosti primjene na različitim tipovima zgrada. Istaknute su razlike između klasične N2 metode i njezinih proširenja. Također, dana je usporedba N2 metode i sličnih proračunskih pristupa. Ustanovljeno je da se rezultati dobiveni proračunima uz primjenu N2 metode dobro slažu s rezultatima dobivenim uz primjenu znatno složenijih metoda. Na kraju su dane smjernice za daljnje istraživanje. Ključne riječi: N2 metoda, metoda postupnog guranja, nelinearna statička metoda, pravilna zgrada, nepravilna zgrada Übersichtsarbeit Adriana Cerovečki, Ivan Kraus, Dragan Morić Methode N2 für die Gebäudeplanung N2 ist eine schnelle nicht lineare statische Methode für die Planung von erbebensicheren Gebäuden. Die Abhandlung stellt die Merkmale und die Grenzen der Methode, deren Entwicklung sowie die Möglichkeiten der Anwendung an verschiedenen Gebäudetypen vor. Hervorgehoben werden die Unterschiede zwischen der klassischen N2 Methode und deren Erweiterungen. Des Weiteren wird ein Vergleich der N2 Methode und ähnlicher Berechnungsansätze dargelegt. Es wurde festgestellt, dass die Ergebnisse, die durch die Berechnung durch Anwendung der N2 Methode erhalten wurden, gut zu den Ergebnissen passen, die man durch die Anwendung wesentlich komplexerer Methoden erhalten hat. Am Ende werden Richtlinien für weitere Untersuchungen gegeben. Schlüsselwörter: N2 Methode, Methode der inelastischen statischen Untersuchung, nicht lineare statische Methode, rechteckiges Gebäude, nicht rechteckiges Gebäude

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“…For this purpose, some new methods, based on nonlinear static procedures (NSPs), have been developed. These methods were introduced as powerful tools for seismic design and assessment of structures, as they are usually able to conservatively predict the seismic response of the structures while keeping the simplicity of application (Bhatt & Bento, 2012 273, 1997;FEMA 356, 2000). However, these guidelines are more focused on the seismic assessment of buildings rather than bridges.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of irregular bridges – comparison of different nonlinear static procedures

Kohrangi

Bento

Lopes

2014

Structure and Infrastructure Engineering

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The adequate seismic performance of transportation infrastructures is important for the functioning of the economy and society. This paper focuses on the seismic assessment and analysis of one of the most important components of these infrastructures, the bridges. In this field, nonlinear static procedures (NSPs) have gained significant attention, resulting in different proposals to improve the accuracy of the procedures while keeping their simplicity. The main goal of this study is focused on the evaluation of the applicability of NSPs for irregular reinforced concrete viaducts. A comparative approach is pursued by resorting to (1) the analyses of the performance of three well-known NSPs (N2 method, modal pushover analysis and adaptive capacity spectrum method) and (2) the extension of the scope of previous studies in this field to a more recent method, the extended N2. As such, a set of bridges with different levels of irregularity, configurations and lengths is investigated. The accuracy of different NSPs is evaluated by comparing the results of NSPs with the ones obtained by means of nonlinear dynamic analyses. The comparison of results confirms the acceptable performance of the multi-modal NSPs and highlights the effectiveness of extended N2 method with respect to its simplicity.

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Comparison of Nonlinear Static Methods for the Seismic Assessment of Plan Irregular Frame Buildings with Non Seismic Details

Cited by 34 publications

References 14 publications

Evaluation of analytical methodologies used to derive vulnerability functions

Evaluation of analytical methodologies used to derive vulnerability functions

N2 building design method

Seismic performance of irregular bridges – comparison of different nonlinear static procedures

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