The predicted traffie mix of a proponed four-lane urban freeway • Passenger cars - 69% Single-unit trucks: • 2-axle, 5000 ib'aske - 20% o 2axle, 9000 Ibasle - 5% • 3asle or more 23,000 Ibasle - 4% • Tractor semitrailers and combinations: o J-axle 20,000 Ibvaxle = 2% The projected AADT during the first year of operation is 3500 (both directions). If the traffice growth rate is estimated at 4% and the design life - 20 years, determine the total equivalent single axle load (ESAL) Assume the design lane factor fa is 042, pt-25, and SN = 3.

The predicted traffie mix of a proponed four-lane urban freeway • Passenger cars - 69% Single-unit trucks: • 2-axle, 5000 ib'aske - 20% o 2axle, 9000 Ibasle - 5% • 3asle or more 23,000 Ibasle - 4% • Tractor semitrailers and combinations: o J-axle 20,000 Ibvaxle = 2% The projected AADT during the first year of operation is 3500 (both directions). If the traffice growth rate is estimated at 4% and the design life - 20 years, determine the total equivalent single axle load (ESAL) Assume the design lane factor fa is 042, pt-25, and SN = 3.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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iv) A highway carries 2500 two axle trucks per day per lane and has a vehicle damage factor of 4 and growth factor of 6%. For a design period of 10 years, compute the number of standard axle load repetitions (in msa).
The predicted traffic mix of a proposed four-lane urban non-interstate freeway: Passenger cars (4.44kN/axle) = 65% 2-axle single unit trucks (22.2kN/axle) = 24% 2-axle single unit trucks (40kN/axle) = 6% 3-axle or more single-unit trucks (100kN/axle) = 3% 3-axle or tractor semitrailers and combinations (90kN/axle) = 2% The projected AADT during the first year of operation is 4000 (in both directions). If the traffic growth rate is estimated at 4%, the percent of the traffic on the design lane is 43%, pt =2.5, and SN =3, calculate the design ESAL at the design life of 25 years.
A road can be paved with either asphalt or concrete. Concrete costs $15,000/km and lasts 20 years. What is the maximum that should be spent on asphalt if it only lasts 10 years? Annual maintenance costs for both pavements are $500/km. MARR = 12%. Demonstrate through real life examples a bridge management software you know.
A roadway project will be constructed in 2026 as flexible pavement, pt= 2.5, expected SN=4 and has a 20-year design life. Design work was done in 2021, with growth rate of 6%. The traffic survey gives axles loads shown in table above. Find the design ESAL according to AASHTO design method. Truck type Type-1 Type-2 Type-3 Type-4 Type-5 Type-6 Axle Category 1-single axle of 30 kips 1- tandem axle of 32 kips 1-single axle of 18 kips 2- tandem axle of 40 kips 1-single axle of 20 kips 1- tandem axle of 36 kips 1- tandem axle of 50 kips 2-single axle of 38 kips 1- tandem axle of 52 kips 2-single axle of 14 kips 1- tandem axle of 32 kips 1- triple axles of 50 kips 1-single axle of 40 kips 1- tandem axle of 32 kips Type-7 CS CamScanner triple axies of 58 kips J 2-single axle of 22 kips 1- tandem axle of 38 kips % Total AADT 9% 10% 7% 5% 3% 5% 4% 12:
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Q2 /a/ There was a need to know the volumes traffic for a rural project where 24 hrs. flows were counted on Thursday, Friday and Saturday in December as follow, Thursday = 8000, Friday = 8000 and Saturday = 10000. Q2 /b/ Design data is required for improvement of two – lane of two way highway with central reserve. The current traffic in 2016 expressed by AADT is 3000 vehicles. The improved road with a design life of 20 years will opened to traffic in 2021, the estimated annual growth rate of traffic is 8%, K-factor is 12% of AADT and D (Directional distribution) is 55% of total traffic. Find DDHV.
For a growth factor of 7.5% per annum and design life of 10 years, determine the cumulative number of standard axle load repetitions (in million) for the following data: Type of commercial vehicle Number of vehicles per day per lane (A) Vehicle Damage Factor (F) Two axle trucks 2000 5 Tandem axle trucks 200 6
The yearly transition probabilities associated with various condition states of urban Interstate highway bridges in a certain district are given below: In 2005, there are 1000, 2000, 1000, and 500 bridges in the Excellent, Good, Fair and Poor condition states, respectively. Find the number of bridges that are expected to be in the Excellent, Good, Fair and Poor conditions in 2010. Assuming that no major repairs during the period, so the original transition matrix stays unchanged.
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Identify and briefly discuss at least 3 risks that may be associated with this project. Highway 410/Steeles Road Project- Highway 410 currently has 4 lanes of traffic in each direction, i.e., northbound and southbound, with a 12-ft median between the northbound and southbound lanes- Steeles Road has 3 lanes of traffic in each direction, i.e., eastbound and westbound, with 4-ft median between the eastbound and westbound lanes- For this project the requirement is to: Build two off-ramps from Highway 410 to Steeles Road to, i.e., eastbound and westbound ramps Build two on-ramps from Steeles Road to Highway 410, i.e., northbound and southbound ramps Build a bridge overpass on Highway 410 over Steeles Road
A 25 km long, 8.001 km wide, 2-lane highway is to be paved with 6.00cm thick layer of asphalt.A fleet of 4 dump trucks are to be employed each with an empty mass of 22metric tons and a carrying capacity of 26 cubic metres. Asphalt with a density of 2.322g/m^3 will be used. Determine a) The number of dump truck loads required b) If it takes 4 hours for each truck to deliver a load, how long in day and hours will it take the trucks to deliver all the asphalt? C) The gross mass of each truck.