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ABRI DE RER

ABRI DE RER. Didier Bruriaud. Etude. O – Mur 1 – Toit 2 - Tirant. On isole le tirant 2. Le poids est négligé. Solide soumis à l’action de 2 forces extérieures. 0 2 1 2. 1’. 2’. LDF. P. Premier point de la LDF. Deuxième point de la LDF. P. B 2 1. 1. LDF. P. A 2 1. 2.

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ABRI DE RER

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  1. ABRI DE RER Didier Bruriaud

  2. Etude O – Mur 1 – Toit 2 - Tirant

  3. On isole le tirant 2 • Le poids est négligé. • Solide soumis à l’action de 2 forces extérieures. • 02 • 12

  4. 1’ 2’ LDF P Premier point de la LDF Deuxième point de la LDF P B21 1 LDF P A21 2 Toit isolé Application du funiculaire O P entre 1 et 2 A21 entre 2 et LDF B21 entre LDF et 1

  5. C02 A12 Tirant isolé

  6. Droite d’action de P (Connue) Droite d’action de B 21 (tracée) Droite d’action de A 12 (Connue) P Simplification du travail I Les droites d’actions sont concourantes en un point que l’on nommera I

  7. B21 P P A21 Dynamique des forces

  8. CQFD

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