Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Présentation1

1,936 views

Published on

  • DOWNLOAD THIS BOOKS INTO AVAILABLE FORMAT (2019 Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THIS can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THIS is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBooks .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THIS Helped Ignite a Movement,-- Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THIS the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THIS Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here

Présentation1

  1. 1. M1 GC 2013-2014 Raphaël BODET Dimensionnement et Calcul de structures DAOU Paul Elie Ramadan DAOUD Descente de charge La descente de charge a pour objectif d’étudier la distribution des charges dans une structure. Toute structure étant soumise à des charges gravitationnelles, le cheminement des efforts s’effectue du niveau le plus haut (toiture) vers le niveau le plus bas (fondation). Principe On détermine les charges qui s’appliquent sur chaque élément porteur de la structure, ce qui va nous permettre d’avoir les charges sur semelles. Toiture et Plancher Poutres et Murs porteurs Poteaux et Murs Fondations Sols Force portante au sol Poids Propre du mur Effet du vent (W) en daN/m² Poids Propre de la toiture en daN/m² Charge de neige (S) en daN/m² Type de charges : Introduction Transmission des charges: surface d’influence C’est la surface de charge qui sera reprise par un élément structural d’un niveau inférieur (poutres & voiles) . Plancher porte suivant 1 sens Plancher porte suivant 2 sens Conclusion La descente de charge est un procédé qui permet donc d’établir les charges surfaciques s’exerçant sur la structure pour déterminer les charges linéaires qui s’appliqueront sur les éléments porteurs verticaux, afin de trouver les charges sur fondations pour les dimensionner. Charge Permanente (G) Charge d’Exploitation (Q) lx/ly < 0,4 lx/ly > 0,4 Charge Permanente (G) Charge d’Exploitation (Q) Exemple : détermination des charges permanentes (G) d’un plancher sur semelles isolées Détermination du sens de portée: Lx/ly=1/3=0,33 => Porte suivant un sens Poids propre du plancher (G): La densité du béton armé est de 2500 daN/m3 0,20[m] x 2500 [daN/m3]=500 [daN/m2] Charge linéaire s’appliquant sur la poutre 1: La charge surfacique est repartie sur deux cotés (1 sens) 500[daN/m²]x1[m]/2=250 [daN/m] Poids propre de la poutre 1 (G): 0,2[m]x0,4[m]x2500[daN/m3]=200 [daN/m] 3m 1m 20cm 4m 20x20cm 20x40cm Charge totale sur poutre: 250[daN/m]+200 [daN/m] = 450 [daN/m] Charge ponctuelle s’appliquant en tête de poteau: Effort tranchant sur poutre à charges uniformément réparties V=P.L/2 450[daN/m]x3[m]/2=675 [daN] Poids propre du poteau (G): 0,20[m]x0,20[m]x4 [m]x 2500 [daN/m3]= 400 daN Charge totale sur semelle: 675 [daN]+ 400 [daN] =1075 [daN]

×