Methods for predicting the lateral stiffness and strength of multi-storey infilled frames

Smith, Bryan Stafford

doi:10.1016/0007-3628(67)90027-8

Cited by 113 publications

(34 citation statements)

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“…The damage concentration at the ÿrst storey is a consequence of the constant resistance of the inÿlled frame along the height. Modelling inÿlled masonry panels subjected to lateral loads by means of diagonal compression-only strut [29] represents the most attractive and employed method, due to both its computational simplicity and its good agreement with the actual behaviour. Several models are available to predict elastic and post-elastic mechanical characteristics of the equivalent strut.…”

Section: Analysis Of the Response Of Model Nomentioning

confidence: 99%

Shaking table tests on reinforced concrete frames without and with passive control systems

Dolce

Cardone

Ponzo

et al. 2005

Earthq Engng Struct Dyn

166

106

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An extensive experimental program of shaking table tests on reduced-scale structural models was carried out within the activities of the MANSIDE project, for the development of new seismic isolation and energy dissipation devices based on Shape Memory Alloys (SMAs). The aim of the experimental program was to compare the behaviour of structures endowed with innovative SMA-based devices to the behaviour of conventional structures and of structures endowed with currently used passive control systems.\ud This paper presents a comprehensive overview of the main results of the shaking table tests carried out on the models with and without special braces. Two dierent types of energy dissipating and recentring braces have been considered to enhance the seismic performances of the tested model. They are based on the hysteretic properties of steel elements and on the superelastic properties of SMAs, respectively.\ud The addition of passive control braces in the reinforced concrete frame resulted in signicant benefits on the overall seismic behaviour. The seismic intensity producing structural collapse was considerably raised, interstorey drifts and shear forces in columns were drastically reduced

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Section: Analysis Of the Response Of Model Nomentioning

confidence: 99%

Shaking table tests on reinforced concrete frames without and with passive control systems

Dolce

Cardone

Ponzo

et al. 2005

Earthq Engng Struct Dyn

166

106

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“…Because of the significant influence of infills on the behaviour of the frames, extensive studies have been performed on this subject by several researchers. Stafford‐Smith () conducted a series of tests on small‐scale mortar infilled steel frame specimens and found that the behaviour of the infill was completely independent of the beam section. Stafford‐Smith () and Stafford‐Smith and Carter () proposed a method for analysing infilled frames, in which the infill was replaced by a diagonal pin‐jointed strut.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of seismic performance of low‐shear strength masonry infills with openings in reinforced concrete frames with deficient seismic details

Mansouri

Marefat

Khanmohammadi

2013

Structural Design Tall Build

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The influence of openings on lateral behaviour of low-shear strength masonry infilled reinforced concrete frames is investigated. The design of the reinforced concrete frames in this study are aimed to reflect common seismic design deficiencies, such as location of lap splices at bottom of columns, insufficient transverse reinforcements at column and beam ends and lack of stirrups at beam-column joints. Six half-scale single-storey, single-bay frame specimens were tested under in-plane lateral loading. The investigated parameters include shape (window and door), size (regular and large windows) and location of the openings (eccentric and central).The results indicate that presence of openings alters the failure mode, increases the damage level and reduces ductility, strength and stiffness of the infilled frame. The door opening led to reductions of 29% in strength, 34% in the effective stiffness and 23% in the energy dissipation capacity. The window openings led to average reductions of 23% in strength, 8% in effective stiffness and 11% in the energy dissipation capacity. Empirical equations are proposed for estimating overall reductions in stiffness and strength of infilled frames because of the presence of openings, which take into account the effects of size, shape and location of openings. Copyright

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“…Posteriormente, algunos investigadores propusieron modelos más refinados. Stafford-Smith et al (Stafford-Smith, 1962, 1966, 1967Stafford-Smith y Carter, 1969) relacionaron el ancho de la diagonal equivalente con la longitud de contacto muro-marco, que a su vez depende de la rigidez relativa muro/marco dada por la ecuación 1, ℎ = ℎ ( sin 2 4 )…”

Section: Introductionunclassified

Nuevas Expresiones De Las NTCM (2017) Para El Cálculo De La Resistencia De Muros Diafragma De Mampostería

Graciano¹,

Escalante

Castorena-González³

et al. 2019

RIS

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Se presentan las nuevas expresiones para calcular la resistencia a corte de muros diafragma de mampostería incluida en el Capítulo 4 de las Normas Técnicas Complementarias para el Diseño y Construcción de Estructuras de Mampostería 2017 del Gobierno de la Ciudad de México. Se consideran tres modos de falla: por aplastamiento, por deslizamiento y por tensión diagonal. Las expresiones se adaptaron de las especificadas en el código canadiense, utilizando los parámetros de resistencia usados en la norma mexicana, y se refiere a una resistencia a corte en los tres modos de falla. Se verificó que los resultados de resistencia calculados con estas expresiones dan resultados satisfactorios, al compararlos con resultados de una campaña experimental que también se presentan aquí. La campaña experimental incluyó seis especímenes, escala 1:2, en los que las variables de estudio fueron la rigidez relativa muro/marco, el uso de elementos de confinamiento y el refuerzo horizontal. Los resultados indican que la rigidez relativa muro/marco tiene un efecto relevante en la resistencia al agrietamiento del muro y la resistencia máxima del sistema. Adicionalmente, la contribución del refuerzo horizontal a la resistencia lateral depende de la rigidez relativa muro/marco, un fenómeno que las expresiones de diseño no toman en cuenta. Los elementos de confinamiento no incrementan la resistencia lateral ni la capacidad de desplazamiento del sistema; sin embargo, las dalas y castillos mejoran la estabilidad fuera del plano del muro y el contacto entre el muro y el marco.

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Methods for predicting the lateral stiffness and strength of multi-storey infilled frames

Cited by 113 publications

References 0 publications

Shaking table tests on reinforced concrete frames without and with passive control systems

Shaking table tests on reinforced concrete frames without and with passive control systems

Experimental evaluation of seismic performance of low‐shear strength masonry infills with openings in reinforced concrete frames with deficient seismic details

Nuevas Expresiones De Las NTCM (2017) Para El Cálculo De La Resistencia De Muros Diafragma De Mampostería

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