ADesign of Reinforcement for RC Capping BeamProject : Changi Airport Line - C504Contiguous Bored Pile (Check for Lateral Loads)bBEAM INFORMATIONLeft 1/4 SpanMiddle SpanRight 1/4 SpanCover c(mm)505050Width b(mm)100010001000dDepth h(mm)800800800hEffective Depth d(mm)700700700Spacing Between Bar(mm)Characteristics Strength of Concrete fcu(N/mm2)353535Characteristics Strength of Reinforcement fy(N/mm2)460460460Characteristics Strength of Reinforcement fyv(N/mm2)460460460CHECK MOMENTLeft 1/4 SpanMiddle SpanRight 1/4 SpanRemarksMaximum Moment per m run under service(KN-m/m)34.134.134.1Maximum Moment per beam per m under ultimate(KN-m/m)47.747.747.7Maximum Moment per beam (Ultimate) Mult(KN-m)47.747.747.7Sagging ThroughoutMult/(bd2)0.100.100.10Mult/(bd2fcu)0.00280.00280.0028la = Min(0.5+sqrt(0.25-k/0.9), 0.95)0.9500.9500.950Lever Arm z = la*d(mm)665665665Asc = M/(0.87*460*z) or 0.13%*Asc(mm2)179179179100Asc/Ac0.1300.1300.130Area of Reinforcement Required Ast(mm2)910910910Rebar Size For Layer1404040Rebar Nos. For Layer1101010Rebar Size For Layer2323232Rebar Nos. For Layer2181818Rebar Size For Layer3000Rebar Nos. For Layer3000Area Of Reinforcement Provided Ast(mm2)270542705427054Reinforcement Ratio(%)3.8653.8653.865Bar Spacing606060Rebar Nos. & Size5T205T205T20OKOKOKCHECK SHEARLeft 1/4 SpanMiddle SpanRight 1/4 SpanRemarksMaximum Shear per m run under service(KN/m)170.4170.4170.4Maximum Shear per beam under service(KN/m)170.4170.4170.4Maximum Shear per beam (Ultimate) Vult(KN)238.5238.5238.5v=V/(b*d)(N/mm2)0.3410.3410.341Design Concrete Stress vc (Table 3.8 of BS 8110)1.0201.0201.020Distance av (Note : leave blank if n.a.)(mm)Enhanced Factor g = 2d / aV1.0001.0001.000Enhanced Shear gvc1.0201.0201.020Max ((v-gvc), 0.4) required by Table3.7 of BS 81100.4000.4000.400Asv/Sv required(mm)1.001.001.00Links Provided2T10-2002T10-2002T10-200Size of Links(mm)101010Nos. Of legs444Link Spacing c/c(mm)200200200Link area provided - Asv(mm2)314314314Asv/Sv provided1.571.571.57O.K.O.K.O.K.CHECK TORSIONLeft 1/4 SpanMiddle SpanRight 1/4 SpanRemarksMAXIMUM TORSION PER m RUN(KN-m/m)0.000.000.00MAXIMUM TORSION(KN-m/m)0.000.000.00ULTIMATE TORSION(KN-m)0.000.000.00HORIZONTAL DISTANCE OF LINK X1(mm)900.00900.00900.00VERTICAL DISTANCE OF LINK Y1(mm)690.00690.00690.00SIZE OF LINKS(mm)10.0010.0010.00AREA OF LINK - 2 LEGS Asv(mm2)157.08157.08157.08STRENGTH OF LINKS fyv(N/mm2)460.00460.00460.00LINKS SPACING Sv=0.8*X1*Y1*Asv*0.87*fyv/(T)(mm)N.A.N.A.N.A.PROVIDINGAREA OF LONGI. BARS INSIDE PERI. OF LINK As (mm2)(mm2)N.A.N.A.N.A.PROVIDING