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| === Deflection calculation timber Eurocode ===
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| The deflection calculation according to the Eurocode has several parts:
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| * '''w-inst :''' Elastic deflection according with the standard elastic modulus of the timber type due to the dead load.
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| * '''w-creep''': Deflection due to creep. 1. Deflection due to load combination SLS 6.16b with normal elastic modulus. 2. Deflection due to combination 6.16b with elastic modulus is Emean/(1+kdef). w-creep=2-1.
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| * '''w-k:''' Deflection due to the 6.14 combination(SLS).
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| * '''w-fin''': w-k + w-creep
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| * '''w-add''': w-k + w-creep - w-inst
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| === Deflection calculation concrete Eurocode ===
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| The physic non-linear properties are used in the calculation using the M-kappa diagram. The stiffness differs per point in the beam due to reinforcement/cracked/non-cracked.
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| The beam is separated into parts. For each part the non-linear properties are calculated based on the reinforcement and M-kappa diagram. Separate calculation are made for the ULS and SLS.
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| [[File:XBeam2DCalculationDeflectionConcrete1.png|629x629px]]
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| [[File:XBeam2DCalculationDeflectionConcrete2.png|630x630px]]
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| '''w-inst :''' Elastic deflection according with the standard elastic modulus of the timber type due to the dead load.(short term EI)
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| '''w-creep''': Deflection due to creep. 1. Deflection due to load combination SLS 6.16b with short term EI. 2. Deflection due to combination 6.16b with elastic modulus is long term EI. w-creep = w;qp;long - w;qp;short.
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| '''w-k:''' Deflection due to the 6.14 combination(SLS).
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| '''w-fin''': w-k + w-creep
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| '''w-add''': w-k + w-creep - w-inst
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