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Samenvatting Colleges Mechanica Bijzondere Onderwerpen 1 BT.MECBOW1.V18

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Samenvatting Colleges Mechanica Bijzondere Onderwerpen 1 BT.MECBOW1.V18

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Uploaded on
October 17, 2023
Number of pages
10
Written in
2023/2024
Type
Class notes
Professor(s)
Lena lappa
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Samenvatting Mechanica Bijzondere
Onderwerpen
College 1 – intro, belastingen......................................................................................................................... 2
College 2 – vakwerken (snede) .................................................................................................................... 3
College 3 – vakwerken knoopevenwicht en nulstaven ......................................................................... 4
College 4 – plasticiteit ..................................................................................................................................... 5
College 5 – plasticiteit, bezwijkmechanisme ........................................................................................... 7
College 6 – stabiliteit, knik ............................................................................................................................. 9

, College 1 – intro, belastingen
Eurocodes
Norm Inhoud
NEN-EN 1991-1-1 Dichtheden, eigen gewicht, opgelegde
belastingen
NEN-EN 1991-1-3 Sneeuwbelastingen
NEN-EN 1991-1-4 Windbelastingen
NEN-EN 1991-1-5 Thermische belasting
NEN-EN 1991-1-7 Buitengewone belastingen (botsing,
explosie)


E = effect = de belasting, daar neem je de maximale
5% van, de andere gevallen ligger daaronder

R = reaction = materiaal, daar neem je de laagste 5%
van, 95% van de materialen zijn sterker dan dat




Uiterste Grens Toestand UGT
Berekenen voor sterkte  gebruik UGT

STR = strengt = sterkte berekening  berekenen of materiaal sterk genoeg is

GEO = toetsen of gronddraagvermogen voor fundering goed genoeg is

Fundamentele combinaties UGT:

RC1 = CC1 RC2 = CC2 RC3 = CC3
6.10a 1,2 * qG,k + ψo * 1,35 1,35 * qG,k + ψo * 1,5 * 1,5 * qG,k + ψo * 1,65 * qQ,k
*qQ,k qQ,k
6.10b 1,1 * qG,k + 1,35 * qQ,k,1 + 1,2 * qG,k + 1,5 * qQ,k,1 + 1,3 * qG,k + 1,65 * qQ,k,1 +
1.35 * Σ ψ0 *qQ,k,rest 1.5 * Σ ψ0 *qQ,k,rest 1.65 * Σ ψ0 *qQ,k,rest


EQU (algeheel 1.1 * qG,k + 1.5 * qQ,k
evenwicht)
Buitengewone 1.0 * qG,k + 1.0 * Ad + 1.0 * ψ2 *qQ,k,1 + 1.0 * Σ ψ2 *qQ,k,rest
combinatie
Bruikbaarheids Grens Toestand BGT
Berekenen op doorbuiging  BGT

Drie varianten:

1. Karakteristiek: direct optredende vervormingen (geen lange duur effecten als kruip)
2. Frequent: scheurvorming in beton
3. Quasi-blijvend: vervorming inclusief lange duur effecten (kruip)

Karakteristiek qG,k + qQ,k,1 + Σ ψ0 *qQ,k,rest
Frequent qG,k + ψ1 * qQ,k,1 + Σ ψ2 *qQ,k,rest
Quasi-blijvend qG,k + Σ ψ2 *qQ,k

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