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structuuranalyse balken samenvatting
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structuuranalyse balken samenvatting
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Les 5 BalkenKrachten en spanningen
- Spanning = N ( kracht ) / A ( oppervlakte )
Balken
- Grote balk, 2m hoog
- Staan lasten op
->ook in beton balk doen alsof er een vakwerk in zit
- Trek en druk zones
- Elk staafjes bepaalde massa binnen -> niet meer losse staafjes, maar zones
1
,Interne krachten uitgedrukt in spanningszones in materiaal
- Vakwerk op 2 steunpunten -> onderaan trek last en bovenaan druk last
- Moment in balk grootste, trek hoogste
- Zones met elkaar interferen
- Waar trek optreed -> wapeningsstaven
2
, ->beugels nemen dwarskrachten op -> beugelwapening -> houden trek en druk
samen
- Onderaan -> trekwapening
- Bovenaan -> drukwapening
->trek en druk testen in beton balk
- Voor gespande ligger
- Balk is getest -> op dwarskrachten bezweken -> niet op trek anders scheuren
in midden
->teveel of te weinig beugelwapening
Balken in gewapend beton
->gewapend
beton niet
homogeen ->
bestaat uit beton
en wapeningstaaf
->beugels nemen
diagonale trek op
->beton dekking
te weinig ->
aantasting door
beton
3
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