Load Distribution Factor:

The formula for deriving at the number of repetitions of the standard axle load during a design period of n years is:

N =365 × A × VDF × F [(1 + r )ⁿ - 1]/r

where A = Number of commercial vehicles per day initially (both directions),

VDF = Vehicle Damage Factor,

F = Load Distribution Factor,

r = Annual rate of growth of traffic (in decimals), and

n =  Design period in years.

Thus, if a two lane road has a present commercial traffic of 4000 veh/day, and the design period is 15 years, the rate of growth of traffic is 7.5%, and the VDF is 3.5, the number of repetitions of standard axle loads during the design Period

N =365 × A × VDF × F [(1 + r )ⁿ - 1]/r

A = 4000

VDF = 3.5

F = 0.75 (Table 4.3)

r = 7.5% = 0.075

n = 15

Substituting, N = 365 × 4000 × .35 × 0.75 [1.07515 - 1]/0.075

= 365 × 4000 × 3.5 × 0.75 [2.96 - 1]/0.075

= 100 million

The million standard axles of repetitions is denoted by "msa".

Posted Date: 1/22/2013 4:32:58 AM | Location : United States

Ask an Expert

Related Discussions:- Calculate load distribution factor, Assignment Help, Ask Question on Calculate load distribution factor, Get Answer, Expert's Help, Calculate load distribution factor Discussions

Write discussion on Calculate load distribution factor
Your posts are moderated

Write your message here..

Related Questions

Curves, spiral curves? spiral curves?

Use plain dumb-bell type and center-bulb sort, Question While selection... Question While selection of waterstop, shall engineers use plain dumb-bell type , center-bulb sort ? Answer Plain dumb-bell kind is used for joint site where sm

Sand layer underlying paving slab or interlocking blocks, Question What... Question What is function of a sand layer underlying paving slab or interlocking blocks? Answer Normally after laying of sub-base layer of paving slab or interlocking

Relation of the angle of contact between pipe invert, Relation of the angle... Relation of the angle of contact between pipe invert and bedding material to the load resisting capacity of pipe Minimum crushing strength is a generally adopted parameter for

Physical classification of stones, Physical Classification Based on the... Physical Classification Based on the structure, the rocks can be classified as following: Stratified rocks Un -stratified rocks A.   Stratified Rocks: These ro

Piles types, name of types of piles? name of types of piles?

Brick masonry., an opening of width 3m and height 2.7 in a brick masonary h... an opening of width 3m and height 2.7 in a brick masonary has to be provided with door cum window. plan, elevation, section and 2 joining details

Zero energy building, This is our final year project can u suggest some tip... This is our final year project can u suggest some tips to do well...

Maintenance of water bound macadam roads, Maintenance of Water Bound Macada... Maintenance of Water Bound Macadam Roads: The maintenance of water bound macadam surface consists of : filling potholes, ruts with additional material and adequately c

Storm water drainage - Road drainage and maintenance, Storm Water Drainage:... Storm Water Drainage: In city streets, the disposal of rain water has to be done through a system of underground storm water drains. The water is collected at the roadside ke