19541425-Reinforced-Concrete-Design-Lecture-04-Rectangular-Beams

19541425-Reinforced-Concrete-Design-Lecture-04-Rectangular-Beams

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Unformatted text preview: Design of Rectangular Beams CE 4108 C o n c r e t e S t r u c t u r e s D e s i g n Load Factors Almost always larger than 1, used to increase loads applied to structures. sed to account for the uncertainties in Used to account for the uncertainties in estimating load magnitudes. Load Combinations (ACI 9.2) U = 1.4(D + F) U = 1.2(D + F + T) + 1.6(L + H) + 0.5(L r or S or R) U = 1.2D + 1.6(L r or S or R) + (1.0L or 0.8W) U = 1.2D + 1.6W + 1.0L + 0.5(L r or S or R) U = 1.2D + 1.0E + 1.0L + 0.2S U = 0.9D + 1.6W + 1.6H U = 0.9D + 1.0E + 1.6H These equations conform to IBC and ASCE 7. U = ultimate load the structures needs to resist D = dead load F = load due to pressure or weight of fluids T = total effect of temperature, creep, shrinkage, differential settlement and shrinkage compensating concrete L = live load H = loads due to weight and lateral pressure of soils, groundwater pressure or pressure of bulk materials L r = roof live loads S = snow load R = rain load W = wind load E = seismic load Load Combinations (ACI 9.2) U = 1.4(D + F) U = 1.2(D + F + T) + 1.6(L + H) + 0.5(L r or S or R) U = 1.2D + 1.6(L r or S or R) + (1.0L or 0.8W) U = 1.2D + 1.6W + 1.0L + 0.5(L r or S or R)...
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This note was uploaded on 05/01/2010 for the course CEE 615 taught by Professor Parra during the Winter '09 term at University of Michigan-Dearborn.

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19541425-Reinforced-Concrete-Design-Lecture-04-Rectangular-Beams

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