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Design-of-Highway-Pavements
The design of dowel bar was carried out and following were found out:
The load carried by outer dowel bar, Pt=1432 kg
The modulus of dowel/concrete interaction, K = 41500 kg/cm2/ cm
The modulus of elasticity, E = 2×106 kg/cm2
The moment of inertia of dowel bar, I=5.147 cm4
The relative stiffness of bar embedded in concrete, β=0.238
The joint width, Z = 2 cm
Determine bearing stress in dowel bar and ascertain its safety.
The load carried by outer dowel bar, Pt=1432 kg
The modulus of dowel/concrete interaction, K = 41500 kg/cm2/ cm
The modulus of elasticity, E = 2×106 kg/cm2
The moment of inertia of dowel bar, I=5.147 cm4
The relative stiffness of bar embedded in concrete, β=0.238
The joint width, Z = 2 cm
Determine bearing stress in dowel bar and ascertain its safety.
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This Chapter Design-of-Highway-Pavements consists of the following topics
Design a tie bar if the trial thickness of 30 cm was found safe. The other details are:
Width of the lane = 3.5 m.
Allowable working stress in concrete = 1250 kg/cm2
Unit weight of concrete = 2400 kg/m3
Coefficient of friction = 1.5
Allowable bond stress in plain bars = 17.5 kg/cm2
Allowable tensile stress in plain bars = 1250 kg/cm2.
The design of dowel bar was carried out and following were found out:
The load carried by outer dowel bar, Pt=1432 kg
The modulus of dowel/concrete interaction, K = 41500 kg/cm2/ cm
The modulus of elasticity, E = 2×106 kg/cm2
The moment of inertia of dowel bar, I=5.147 cm4
The relative stiffness of bar embedded in concrete, β=0.238
The joint width, Z = 2 cm
Determine bearing stress in dowel bar and ascertain its safety.
The axle load and the stress ratio of the various axle loads are represented in the table below. The expected number of repetitions is also provided against each axle load. Using the data given below, find the cumulative fatigue life.
| Axle load (AL) | Stress ratio | Expected repetitions (n) |
|---|---|---|
| Single axle | ||
| 20 | 0.58 | 67544 |
| 18 | 0.50 | 165645 |
| 16 | 0.43 | 487907 |
| Tandem axle | ||
| 36 | 0.48 | 35765 |
| 32 | 0.42 | 35765 |
