Accidental Eccentricity of Story Shear for Low-Rise Office Buildings

De-la-Colina, Jaime; Benítez, Bernardino; Ruiz, Sonia E.

doi:10.1061/(asce)st.1943-541x.0000302

Cited by 11 publications

(8 citation statements)

References 9 publications

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“…Some authors [10,11], however, present arguments suggesting that accidental eccentricity should vary with building height. Such studies also reveal that design recommendations obtained from studies based on one-story models (e.g., [12]) cannot be directly applied to multistory buildings.…”

Section: Introductionmentioning

confidence: 92%

“…In their study they divided each building plan with imaginary cells and reported data for each individual cell. With this information it was possible to justify a Gaussian pdf that describes the spatial distribution of the mass center due to live load [11]. Because this distribution ranges from À1 to +1, it is possible to obtain resultant locations outside of the building model slab during simulations.…”

Section: Number Of Simulations and Probability Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Accidental eccentricities, frame shear forces and ductility demands of buildings with uncertainties of stiffness and live load

De-la-Colina

González-Pérez

Valdés-González

2016

Engineering Structures

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Section: Introductionmentioning

confidence: 92%

Section: Number Of Simulations and Probability Modelsmentioning

confidence: 99%

Accidental eccentricities, frame shear forces and ductility demands of buildings with uncertainties of stiffness and live load

De-la-Colina

González-Pérez

Valdés-González

2016

Engineering Structures

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“…Por su parte, el reglamento de la ciudad de México (RC CdMx-2017), especifica un valor que disminuye linealmente desde 0.10b para el entrepiso superior del edificio hasta 0.05b para el inferior. Esta aproximación toma en cuenta algunos resultados que revelan que la torsión accidental disminuye hacia la base del edificio (De-la-Colina, et al, 2011). La falta de consenso entre los reglamentos de diseño para estimar la excentricidad accidental de proyecto sugiere que las cláusulas ofrecidas requieren mayor estudio.…”

Section: Introductionunclassified

“…En realidad, la excentricidad accidental es de naturaleza aleatoria, por lo que el valor estipulado por los reglamentos es solamente una aproximación determinista. Estudios recientes que han abordado el problema de la torsión accidental (Nelson, 2001;Escobar et al, 2002;Hernández and López, 2004;Escobar et al, 2004;De la Colina et al, 2011;García, 2015;De la Colina et al, 2016) sugieren proponer otros procedimientos para tomar en cuenta sus efectos en el diseño sísmico de edificios.…”

Section: Introductionunclassified

Estimación De Los Efectos De Torsión Accidental Sísmica a Partir De La Amplificación De La Respuesta De Un Modelo Torsionalmente Balanceado

Cortes

Martínez

González

2020

RIS

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Mediante simulación Monte Carlo y el programa de análisis Canny-E, se analizan dinámicamente ocho modelos estructurales elásticos representativos de edificios de marcos de concreto reforzado de 4, 7 y 10 niveles, con el objetivo de establecer un procedimiento simplificado para tomar en cuenta los efectos de la torsión accidental en el diseño sísmico de edificios. Los resultados muestran que es factible diseñar por torsión sísmica un edificio a base de marcos, representativo de edificios de oficinas, empleando una relación simple que amplifica la respuesta del correspondiente modelo torsionalmente balanceado para estimar los elementos mecánicos y cinemáticos de diseño.

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“…The nominal load intensities are taken from Gupta et al (1999) and the loading parameters, intensity variation and acting location, are based on the research done by De-la-Colina et al (2011).…”

Section: Floor Load Parameters: 3- 9- and 20-story Modelsmentioning

confidence: 99%

Seismic Performance of Symmetric Steel Moment Frames With Random Reactive Weight Distributions

Williamson

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When a structure undergoes seismic excitation, the intensities and spatial distributions of the reactive weights on the structure may not be the same as those assumed in original design. Such a difference is inevitable due to many facts with the random nature (e.g., redistribution of live load), resulting in accidental eccentricity and consequently torsional response in the system. The added torsion can cause excessive deformation and premature failure of the lateral force resisting system. Its detrimental effect is typically accounted for in most building design codes with an arbitrarily specified accidental eccentricity value. While it tends to amplify drift response of buildings under earthquake excitations, it is unclear whether the code specified accidental eccentricity is quantitatively adequate or not in seismic fragility assessment of steel moment frames (including low-rise, mid-rise and high-rise frames) with random reactive weight distributions. This thesis applies surveyed dead and live load intensities and distributions to three representative steel moment resisting frame structures that have been widely investigated in a series of projects under the collaboration of the Structural Engineers Association of California (SEAOC), the Applied Technology Council (ATC), and Consortium of Universities for Research in Earthquake Engineering (CUREE), known as SAC. Based on an extensive parametric study and incremental nonlinear dynamic analyses, it is found that variable load intensity and eccentricity had negligible impacts on the inter-story drifts of the low-and high-rise steel moment frames. However, they affect to a higher degree the performance of the mid-rise steel moment frames. Moreover, it is found that under the maximum considered earthquake (MCE) event, the actual drifts in steel moment frames with random reactive weight distributions can be conservatively captured through consideration of the code specified accidental eccentricities.

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Accidental Eccentricity of Story Shear for Low-Rise Office Buildings

Cited by 11 publications

References 9 publications

Accidental eccentricities, frame shear forces and ductility demands of buildings with uncertainties of stiffness and live load

Accidental eccentricities, frame shear forces and ductility demands of buildings with uncertainties of stiffness and live load

Estimación De Los Efectos De Torsión Accidental Sísmica a Partir De La Amplificación De La Respuesta De Un Modelo Torsionalmente Balanceado

Seismic Performance of Symmetric Steel Moment Frames With Random Reactive Weight Distributions

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