Approximating frequencies of tall buildings / Clive L. Dym in Journal of structural engineering, Vol. 139 N° 2 (Février 2013)  

Public ISBD [article]  inJournal of structural engineering > Vol. 139 N° 2 (Février 2013) . - pp. 288–293 Titre : Approximating frequencies of tall buildings Type de document : texte imprimé Auteurs : Clive L. Dym, Auteur Année de publication : 2013 Article en page(s) : pp. 288–293 Note générale : structural engineering Langues : Anglais (eng) Mots-clés : tall building models  coupled elementary shear beams  outrigger belt  rayleigh quotient Résumé : A Rayleigh quotient is developed to calculate estimates of the fundamental frequencies of tall slender buildings. The quotient provides simple analytical frequency estimates that agree well with results reported using a more detailed beam model and finite-element analyses. It is also shown that the fundamental frequency varies inversely with the height H of the building being modeled, and that the additional stiffening provided by one model of an outrigger appears not to appreciably alter the fundamental frequency. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000656 [article] Approximating frequencies of tall buildings [texte imprimé] / Clive L. Dym, Auteur . - 2013 . - pp. 288–293. structural engineering Langues : Anglais (eng) in Journal of structural engineering > Vol. 139 N° 2 (Février 2013) . - pp. 288–293 Mots-clés : tall building models  coupled elementary shear beams  outrigger belt  rayleigh quotient Résumé : A Rayleigh quotient is developed to calculate estimates of the fundamental frequencies of tall slender buildings. The quotient provides simple analytical frequency estimates that agree well with results reported using a more detailed beam model and finite-element analyses. It is also shown that the fundamental frequency varies inversely with the height H of the building being modeled, and that the additional stiffening provided by one model of an outrigger appears not to appreciably alter the fundamental frequency. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000656

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End-loaded shallow curved beams / Clive L. Dym in Journal of structural engineering, Vol. 137 N° 7 (Juillet 2011)  

Public ISBD [article]  inJournal of structural engineering > Vol. 137 N° 7 (Juillet 2011) . - pp. 782-789 Titre : End-loaded shallow curved beams Type de document : texte imprimé Auteurs : Clive L. Dym, Auteur Année de publication : 2011 Article en page(s) : pp. 782-789 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Shallow curved beams arches Axial loading Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This note examines the linear response of thin, shallow curved beams to an axially-directed compressive load. The response is tracked with a rise parameter drawn from related work on linear arches through which it is shown that the curved beam behaves like an axially compressed bar for small values of the rise parameter, whereas it responds as a beam in bending for large values of the parameter. This is totally opposite to that of laterally-loaded arches. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i7/p782_s1?isAuthorized=no [article] End-loaded shallow curved beams [texte imprimé] / Clive L. Dym, Auteur . - 2011 . - pp. 782-789. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 7 (Juillet 2011) . - pp. 782-789 Mots-clés : Shallow curved beams arches Axial loading Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This note examines the linear response of thin, shallow curved beams to an axially-directed compressive load. The response is tracked with a rise parameter drawn from related work on linear arches through which it is shown that the curved beam behaves like an axially compressed bar for small values of the rise parameter, whereas it responds as a beam in bending for large values of the parameter. This is totally opposite to that of laterally-loaded arches. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i7/p782_s1?isAuthorized=no

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Stress and displacement estimates for arches / Clive L. Dym in Journal of structural engineering, Vol. 137 N° 1 (Janvier 2011)  

Public ISBD [article]  inJournal of structural engineering > Vol. 137 N° 1 (Janvier 2011) . - pp. 49-58 Titre : Stress and displacement estimates for arches Type de document : texte imprimé Auteurs : Clive L. Dym, Auteur ; Harry E. Williams, Auteur Année de publication : 2011 Article en page(s) : pp. 49-58 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Arch structures Qualitative behavior Gravity loads Radially directed Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents analytical estimates of the behavior exhibited by curved, archlike structures under radially directed and gravitational line loads. The behavior is shown to range from elementary beam bending at one end to a state of pure compression at the other, and its behavior can be tracked by an arch rise parameter that is a function of the arch’s semivertex angle, radius and thickness. The principal results are useful estimates of the dependence of the major displacements and stress resultants on the arch rise parameter. The results also offer some insight into the assumptions underlying Robert Maillart’s arch designs. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i1/p49_s1?isAuthorized=no [article] Stress and displacement estimates for arches [texte imprimé] / Clive L. Dym, Auteur ; Harry E. Williams, Auteur . - 2011 . - pp. 49-58. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 1 (Janvier 2011) . - pp. 49-58 Mots-clés : Arch structures Qualitative behavior Gravity loads Radially directed Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents analytical estimates of the behavior exhibited by curved, archlike structures under radially directed and gravitational line loads. The behavior is shown to range from elementary beam bending at one end to a state of pure compression at the other, and its behavior can be tracked by an arch rise parameter that is a function of the arch’s semivertex angle, radius and thickness. The principal results are useful estimates of the dependence of the major displacements and stress resultants on the arch rise parameter. The results also offer some insight into the assumptions underlying Robert Maillart’s arch designs. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i1/p49_s1?isAuthorized=no

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