Code-Oriented Methodology for the Seismic Design of Regular Steel Moment-Resisting Braced Frames

Tapia-Hernández, Edgar; Tena‐Colunga, Arturo

doi:10.1193/032012eqs100m

Cited by 19 publications

(7 citation statements)

References 11 publications

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“…The collapse mechanism is completely different from the one assumed in the design process (strong column -weak beam -weaker brace mechanism). In fact, results of recent research regarding braced frames (Tapia-Hernández and Tena-Colunga [4], Lacerte and Tremblay [23]) conclude that following current building codes, final collapse mechanism do not necessarily agree in many instances with the initial design assumptions in rational analyses of buildings. In addition, no dependency was observed between this trend and the modeled base condition.…”

Section: Collapse Mechanismsmentioning

confidence: 99%

“…Structures designed under a ductile behavior philosophy could have near-elastic responses and important overstrength reserves that are not necessarily considered in the design process (Tapia-Hernández and Tena-Colunga [4]). Therefore, the employment of the normative load patterns does not guarantee the optimum use of materials in regular buildings.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Soil-Structure Interaction of Ductile Steel Frames in Soft Soils

2017

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ABSTRACT:Results of static and dynamic nonlinear analysis of ductile steel frames of 8-and 12-stories buildings are discussed in this paper. The influence of dynamic soil-structure interaction in deformation demands, failure mechanism, ductility and overstrength capacities and maximum demands in columns were analyzed. For this purpose, buildings were designed and studied under three boundary conditions: (i) fixed-base (no Soil-Structure Interaction), (ii) pile foundation and (iii) mat foundation condition. The influence of the lateral stiffness was studied through the response of moment resisting frames (unbraced frames), 1-braced bay frames and 2-braced bays frames. Soil foundation dynamic stiffness (impedance function) is introduced by a set of springs in horizontal and rocking direction, which were computed from the dynamic behavior and properties of the soil-foundation system. It was found that fixed base model might not be a conservative representation of the response of buildings with flexible foundations, especially when a pile foundation system is considered.

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Section: Collapse Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Soil-Structure Interaction of Ductile Steel Frames in Soft Soils

2017

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“…En el caso típico de marcos de acero con contravientos, la demanda de distorsión queda restringida a la capacidad de algunos entrepisos después del pandeo por compresión en marcos con contravientos concéntricos (Marino y Nakashima 2006;Lacerte y Tremblay 2006;Tapia y Tena 2014;D'Aniello et al 2015) y también en marcos con contravientos excéntricos después de la fluencia de la viga enlace (Rozon et al 2008;García 2015). Por esto, la predicción adecuada de las capacidades del contraviento trasciende a la estimación adecuada de la capacidad de deformación de los entrepisos y, en consecuencia, en la evaluación de la rigidez lateral de todo el sistema.…”

Section: Introductionunclassified

Estudio Paramétrico Del Modelado Inelástico De Contravientos De Acero

Hernández¹,

Carrera²,

Macorra³

2016

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RESUMENEn el artículo se presenta un estudio paramétrico que evalúa aproximaciones óptimas del modelado de contravientos de acero mediante la influencia de la discretización transversal, el número de subelementos, imperfecciones geométricas en el centro del claro, modelado de la placa de conexión, puntos de integración, fatiga y endurecimiento por deformación del material. Se realizaron análisis estáticos y dinámicos no lineales desarrollados en el programa OpenSees. En los análisis estáticos no lineales, la capacidad del contraviento se estudió mediante una carga en compresión que se incrementó monótonamente; mientras que la respuesta en ciclos histeréticos de los contravientos se evaluó mediante análisis dinámicos no lineales a un marco diseñado por capacidad. Con base en los resultados, se establecen recomendaciones que pretenden favorecer la obtención de resultados consistentes entre el modelo analítico y la respuesta típica de contravientos. Igualmente, se discute la influencia de la relación de esbeltez de los contravientos en la respuesta de los modelos. Además, se propone un factor para una evaluación más realista de la sobrerresistencia del material para las condiciones específicas del mercado mexicano. La propuesta depende del tipo de perfil estructural y el tipo de acero y se desarrolló a través de un estudio estadístico de 1,756 certificados de calidad de laboratorio de muestras de acero.Palabras clave: Contraviento de acero; modelo; curva de capacidad; curva de histéresis; sobrerresistencia PARAMETRIC STUDY OF THE INELASTIC MODEL OF STEEL BRACES ABSTRACTOptimal modeling approaches of steel braces are evaluated in this paper in a parametric study through the influence of the transversal discretization, the number of sub-elements, geometrical imperfections at the mid-span, gusset plate models, integration points, fatigue and strain hardening of the material. Pushover and nonlinear time-history analyses were performed using OpenSees software. Pushover analyses were carried out in order to study the axial capacity of the brace element under a monotonically increasing compression load. The hysteretic response was evaluated by nonlinear Artículo recibido el 16 de enero de 2016 y aprobado para su publicación el 11 de abril de 2016. Se aceptarán comentarios y/o discusiones hasta cinco meses después de su publicación.(1) Universidad Autónoma Metropolitana Azcapotzalco, Av. San Pablo 180, Col. Reynosa Tamaulipas,

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“…Reasonable agreement can be observed between the model in OpenSees and experimental test to predict the capacity of a member subject to flexo-axial loading [21]. Further details and validation of this modeling technique can be found elsewhere in Tapia-Hernández and Tena-Colunga [22].…”

Section: Nonlinear Analysesmentioning

confidence: 99%

Tubular Steel Poles Under Lateral Load Patterns

Tapia-Hernández¹

2016

Volume 12 Number 4

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Hurricane Odile hit Baja California Sur, Mexico in 2014, causing substantial damage to local steel pole structures (light poles and electricity poles). Based on the failure characteristics observed on such poles, this paper develops an analytical study aimed at evaluating the wind-excited inelastic response of slender vertical cantilever structures. Displacement-controlled pushover analyses are performed in OpenSees. The research pretends to establish a reference of the deformation limit for the serviceability limit state in order to contribute to make conservative decisions in the design phase of steel poles.

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Code-Oriented Methodology for the Seismic Design of Regular Steel Moment-Resisting Braced Frames

Cited by 19 publications

References 11 publications

Dynamic Soil-Structure Interaction of Ductile Steel Frames in Soft Soils

Dynamic Soil-Structure Interaction of Ductile Steel Frames in Soft Soils

Estudio Paramétrico Del Modelado Inelástico De Contravientos De Acero

Tubular Steel Poles Under Lateral Load Patterns

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