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a) What is the difference between an AADT and an ESA?

b) Why would you consider adopting a longer design life for a pavement?

c) What are three different methodologies for forecasting traffic volumes? What are their strength

1. Conceptually describe how you would evaluate the initial grade of the new segmental culvert so that in its final condition (i.e. after all settlement is complete) it slopes with a 4% grade. The culvert will be installed prior to construction of the embankment (i.e. the embankment will be filled over the culvert).

A 3 m by 3 m square footing is sitting 1.6 m below the ground surface. The anticipated column loads include a moment (M=50 kN.m), a horizontal force (Qh=40kN, acting in the same direction as the moment) at the ground surface and a vertical force (Qv=260kN). Determine the minimum and maximum stress beneath the footing and draw the stress profile diagram to scale.

Wondering if I am doing these calculations correctly I have a lab report due today.

Questions

Sample Calculation:

5. = s / e

(10,600,000 psi)*1102 = 1.168 x 10^10 lb

E = 10600 ksi = 10,600,000 psi

Table 3 and 4 present the particle size and index properties of soils. Use at least two methods to qualitatively identify the swell potential of the samples. Conclude on the effect of sand addition.

Table 4. Percentages of fines passing 75um size sieve.

Table 3. Atterberg limits of natural soil and mixtures with sand.

A car is traveling at 20 mi/h on good, dry
pavement at 5000 ft elevation. The front-wheel-drive
car has a drag coefficient of 0.30, a frontal area of 20 ft2
and a weight of 2500 lb. The wheelbase is 110 inches
and the center of gravity is 20 inches from the ground,
50 inches behind the front axle. The engine is producing
95 ft-lb of torque and is in a gear that gives an overall
gear reduction ratio of 4.5. The radius of the drive
wheels is 14 inches and the mechanical efficiency of the
drivetrain is 90%. What would the acceleration of the
car be if the driver was accelerating quickly to avoid a
collision?

a) 3.65 ft/s2
b) 15.53 ft/s2
c) 15.90 ft/s2
d) 3.48 ft/s2

Q 7. Explain Finite Elements Solution of Bean on Elastic Foundation.

Q3 (a) Figure Q3 (a) shows a cantilever beam which is carry a load P at point C.
(i) Sketch the deflection curve of the beam.
(ii) Derive the bending moment deflection, slope deflection and deflection equation at b-b using Double Integration Method.
(iii) Calculate the maximum deflection. Given: L= 10 m, a= 3m, P= 25 kN. EI is constant

(b) Figure Q3 (b) shows a solid steel spindle AB that has a diameter ??=38 mm. The allowable shearing stress of the spindle is 84 MPa, while sleeve CD is made of a brass with an allowable shearing stress of 50MPa. Determine the largest torque (T), that can be applied at A.

Explain why the stiffness of a discontinuous fiber composite is less than that of a continuous fiber composite with the same constituents and same proportion of reinforcement.

How to obtain peak deviator stress from the three triaxial tests plotted on a graph? HINT.

A monolithic reinforced concrete floor is to be composed of rectangular bays measuring 6 m x 7.5 m. The floor is to designed to carry a service live load of 5 KPa, floor finish of 1.5 KPa, and ceiling load of 1 KPa, in addition to its own weight.

Design the corner floor panel slab using fc’=21 MPa, fy = 400 MPa, and concrete unit weight of 23.54 KN/m3.

?? ?ℎ??? ???? ???????????, ?????? ?ℎ? ???? ????, ??? ??????? ?ℎ? ??????? ?????????y

A water treatment plant is designed for a constant flow rate of 3 MGD. The flocculation system consists of three tanks, each having a water depth of 10 ft and an average hydraulic residence time (HRT) of 30 min.   
(a) Determine the dimension of each tank (i.e., width and length).

(b) Determine whether the flow through velocity is acceptable.

(c) The plant is planning to take one tank out of service for maintenance. Determine the increase in power requirement in the remaining two units to maintain the average velocity gradient (G) of 40 sec-1.

Summarise the cement production process.

arrive the cross section of a plate girders for railway bridge with effective span of 30m and dead load on the open floor 7.5 KN/m . equivalent total load for BM calculation per track is 2727KN and for shear is2927 kN