For a standard case with h = 8 inch and k = 100 psi, the corner deflection is 0.0353 inch under 18-kip single axle load and 0.0459 inch under a 36-kip tandem axle load. If predicted number of load repetition is 5x106, determine the percent erosion damage under single- and tandem-axle load, respectively.
<Equations>
p = k×w
Rate of work, P = 268.7 ́(p2/hk0.73)
Log N = 14.524-6.777(C1P-9.0)0.103
where C1 = 1 for untreated and 0.9 for treated subbase
Percent erosion damage = 100 ́sum of (0.06ni/Ni) for all vehicle
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In: Civil Engineering
a. If a pipe has failed a MIT, what measures can be done next .
b.What follow-up treatment could be required for the MIT failed pipe? Give two.
c. Christmas tree provides both surface pressure control and flow line control’ How this is possible?
d. On opening the gate valve, the flow path is enlarged in a highly nonlinear manner with respect to the opening. Why?
e. Give other shut off applications in oil industry, where ball valves can be used.
In: Civil Engineering
2. How can we reduce the number of private vehicles in the city, and what are the benefits of this approach?
based on engineer and society subject pls elaborate it not more than 5 pages
pls include the reference also
In: Civil Engineering
Topic:
There are just too many vehicles in Malaysian cities. Are cities
being designed to accommodate vehicles and not people?
based on engineer and society subject
pls try to elaborate it not more than 5 pages?
In: Civil Engineering
How do you utilise the Homer Pro optimiser or search space to identify the optimal number of wind turbines and battery capacity for a system?
In: Civil Engineering
Q3. a) Discuss the factors to be accounted for when specifying connections for structural steel work and highlight their effects on the construction process and structural performance.
In: Civil Engineering
In your opinion, what is the importance of studying soil mechanics? Justify your opinion by giving any two practical examples.
In: Civil Engineering
In: Civil Engineering
hello, I am having an issue with a question in my highway engineering course.
the question is:
An equal tangent sag vertical curve has an initial grade of –2.5%. It is known that the final grade is positive and that the low point is at elevation 82 m and station 1 + 410.000. The PVT of the curve is at elevation 83.5 m and the design speed of the curve is 60 km/h. Determine the station and elevation of the PVC and PVI.
In: Civil Engineering
(a) For the soft-contact lithography process, the usual
application methods of the resist of shallow structures is by using
a spinner. Suggest alternative choices for resist application for
deep (e.g. MEMS) features.
(b) Explain the options for a zero gap distance in contact
lithography.
(c) Using schematics where necessary, describe;
(i) How diffraction effects modify the resist profile for positive
and negative resist.
(ii) Methods by which an ideal resist profile for a lift-off
processes may be realised.
(d) A resist is applied by spinner giving a particular thickness.
Describe possible strategies to double the resist thickness for
this resist.
In: Civil Engineering
2. Design an all-bolted double-angle connection for a W24x146 A992 beam to carry a dead load reaction of 25 kips and a live load reaction of 75 kips. Use 5/16 in. angles and ¾ in A325N bolts in standard holes. The uncoped beam is connected to the flange of a W14x132 column. Design by both LRFD and ASD method.
In: Civil Engineering
Talking with a scheduler, review construction schedule and answer the following questions:
In: Civil Engineering
Q2)What would be the maximum aggregate size used for the given mixture properties by using ACI Method of Mix Design. 28-day specified concrete strength is 12 Mpa, standard deviation is choosen as 3.7Mpa and it is required that no more than 1 test result in 200 will fall below the specified strength.
Project Title:Detoration of wood column of a commercial building
Project summary:Wood deterioration at the lower level of a heavy timber column, which supports five floor levels, was remedied by removing a section of column and the construction of a new concrete pier and footing.
For Coarse Aggregate (Uncrushed):SSD Bulk Specific Gravity: 2.60, Absorption Capacity: 1.8 %, Total Moisture: 2.3 % and Dry Rodded Unit Weight: 1430 kg/m3.
For Fine Aggregate (Crushed):SSD Bulk Specific Gravity: 2.70, Total Moisture: 3.4% and Free Moisture: 1.4%. FM= 2.65, Zone II.
Cement:Portland Composite Cement, Specific Gravity: 3.01. For 1,4 m3cement is calculated as 48 kg.
Q3) use the data in question 2 and determine the amount of chemical admixture required for 0.4%
In: Civil Engineering
Q1) Designa concrete mixture proportions which will be used for offshore concrete platform.Norway is a world leader on offshore concrete platforms with 7 of the world’s 30 larger offshore concrete structures located on the Norwegian continental shelf. The first of these platforms where the Ekofisk Tank installed in 1974 and the last was Troll gravity based structure installed in 1996. The Sakhalin project is located in a harsh and artic environment where concrete structures have proven excellent characteristics with a minimum of maintenance. 80 mm slump value is required for the Sakhalin project. 28-days concrete characteristic strength is 8 MPa. It is required that no more than 1 test result in 100 will fall below the specified strength. The fine aggregate has a fineness modulus of 2.60 and Zone 3. For Coarse Aggregate (Uncrushed):SSD Bulk Specific Gravity: 2.65, Absorption Capacity: 2.4%, Total Moisture: 1.4% and Dry Rodded Unit Weight: 1345 kg/m3. For Fine Aggregate (Uncrushed):SSD Bulk Specific Gravity: 2.70, Total Moisture: 3.4% and Free Moisture: 2 %. Cement: Portland Composite Cement, Specific Gravity: 2.97. For 0.5 m3of concrete, binder amount is calculated as 120 kg(Use ACI Method of Mix Design)
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