SpectrumAxle Load Spectrum for the Example
RoadLoadSASSADTADTRA2274137004209316040615364219085014555001071437910122189083451485521410160184150451804316902001585760220237702402261452600161452800760300029136320059793400820360044538000454000804200015440001914600015480000500000520000540000560000580000600000620000640000660000
RGDP DesignFlextural strength of Concrete, Mpa4.4145Spacing of
Contraction Joints, m4.0Effective modulus of subgrade reaction of
DLC subbase, MN/m3147Width of slab, m3.5Elastic Modulus of
Concrete, MPa2.943E+04No of lanes in both directions4Poisson's
ratio0.15Type of carriagewayDividedCoefficient of thermal expansion
of concrete, / 0C1.00E-05Trial Thickness of PQC, mm325Tyre
pressure, kPa800Radius of relative stiffness, m0.875Growth rate of
traffic7.5%Growth Factor103.40Design Life, Years30Lane Distribution
Factor0.75Proportion of trucks plying along edge0.34Directional
Distribution Factor0.54Axle Load, tLF*Axle Load, tNo. of
Axlesstress, kg/cm2Expected No.Stress RatioAllowable No.Damage
RatioSingle Axle With Single
Wheel1619015.200.34Unlimited0.01417813.7428910.30Unlimited0.012142112.11111620.27Unlimited0.010127110.53706680.23Unlimited0.08105018.826048180.20Unlimited0.06715367.079822810.16Unlimited0.04520935.1108791410.11Unlimited0.0222742.914262960.06Unlimited0.0Single
Axle with Dual
Wheels2428.8224.73126900.551261670.1012226.4223.26126900.523676480.035202415821.728190290.4820049540.4091821.64320.172214030.45907339120.0021619.218418.459567280.41Unlimited01416.855228691370.00Unlimited01214.489046275690.00Unlimited0101243722732480.00Unlimited0Tandem
Axle4048816.76428910.37Unlimited03643.28615.534467560.35Unlimited03238.48814.234589840.32Unlimited02833.623712315010.00Unlimited02428.863833175780.00Unlimited0202474538706010.00Unlimited01619.229115148340.00Unlimited0Tridem
Axle4857.61521.54788710.4826465450.0304452.820720.0610733310.451517666410.00740484518.552350890.41Unlimited0.0000.58Check
for Combination of StressesLX/l4.5719738927CX0.60015269Curling
Stress1.590Whell Load Stress2.430Combined Stress4.020Check for
Corner StressAxle Load, t24Wheel Load, t12Radius of contact,
cm30.59Corner Stress, kg/cm219.45Tie bar designDeformed barsArea of
tie bar steel, cm23.2762.0475Area of 12 mm tie
bar1.1311.131Perimeter of tie bar3.7703.770Spacing,
cm34.52355.237Length of tie bar, cm57.85763.780
DowelsDiameter of Dowel32mmLength of Dowel500mmMoment of
Inertia0.0000000515m4Modulus of Dowel Support400000MpaModulus of
Elasticity of Dowel
Steel200000Mpa88.29kN88.29kN0.150.250.250.250.250.250.250.250.250.250.250.250.250.250.15Load
by each Dowel10.71264367820.42528735630.137931034500Max load by one
dowel15.52kNPermissible bearing stress29.23MpaRelative Stiffness of
Dowel23.61m-1Bearing Stress in Dowel28.31Mpa
