Calculo de Anchura de Fissuras em Concreto Armado - BS 8110 e BS 8007, Manuais, Projetos, Pesquisas de Física para Ensino Médio

Baixe Calculo de Anchura de Fissuras em Concreto Armado - BS 8110 e BS 8007 e outras Manuais, Projetos, Pesquisas em PDF para Física para Ensino Médio, somente na Docsity! Project Spreadsheets to BS 8110etc Client Advisory Group Made by Date Page Location Grid line 1 RC 29-Dec-2022 33 Crack Width Calculations to BS8110: 1997/ BS8007:1987 Checked Revision Job No chg - R68 CRACK WIDTH CALCULATIONS - FLEXURE - INPUT fcu= 32 420 2093 1000 mm 250 mm 200 mm 40 mm 150 mm 20 mm 80.1 mm "acr " is distance from the point considered to the surface of the nearest longitudinal bar 69.0 KNm CALCULATIONS 13.2 200.0 15.15 0.010 85 mm 172 192 9.43 0.001380 Used n/a 0.000188 0.001191 CALCULATED CRACK WIDTH, 'w' = 0.19 mm REINFORCED CONCRETE COUNCIL Originated from RCC14.xls on CD © 1999 BCA for RCC N/mm2 fy= N/mm2 Area of reinforcement " As " = mm2 b = h = d = Minimum cover to tension reinforcement " CO " = Maxmum bar spacing " S " = Bar dia " DIA " = " acr " =(((S/2)^2+(CO+DIA/2)^2)^(1/2)-DIA/2) as default or enter other value = Applied service moment " Ms "= moduli of elasticity of concrete " Ec" = (1/2)*(20+0.2*fcu) = KN/mm2 moduli of elasticity of steel " Es " = KN/mm2 Modular ratio " a " = (Es/Ec) = " r " = As/bd = depth to neutral axis, "x" = (-a.r +((a.r)2 + 2.a.r)0.5.d = " Z " = d-(x/3) = Reinforcement stress " fs " = Ms/(As*Z) = N/mm2 Concrete stress " fc " = (fs*As)/(0.5*b*x) = N/mm2 Strain at soffit of concrete beam/slab " e1 " = (fs/Es)*(h-x)/(d-x) = Strain due to stiffening effect of concrete between cracks " e2 " = e2 = b.(h-x)2/(3.Es.As.(d-x)) for crack widths of 0.2 mm e2 = 1.5.b.(h-x)2/(3.Es.As.(d-x)) for crack widths of 0.1 mm e2 = Average strain for calculation of crack width " em "= e1-e2 = Calculated crack width, " w " = 3.acr.em/(1+2.(acr-c)/(h-x)) Notes Page 2 Disclaimer Status of spreadsheet Public release version. Date Version Action 04-Aug-99 RCC14 v0.1 Renamed All advice or information from the British Cement Association and/or Reinforced Concrete Council is intended for those who will evaluate the significance and limitations of its contents and take responsibility for its use and application. No liability (including that for negligence) for any loss resulting from such advice or information is accepted by the BCA, RCC or their subcontractors, suppliers or advisors. Users should note that all BCA software and publications are subject to revision from time to time and should therefore ensure that they are in possession of the latest version. This spreadsheet should be used in compliance with the accompanying publication 'Spreadsheets for concrete design to BS 8110 & EC2' available from British Cement Association, Telford Avenue, Crowthorne, Berkshire RG45 6YS. Revision history RCC14 Crack Width.xls