(a) In terms of relative strength, put fcd (design
strength of concrete), fck
(characteristic strength of concrete) and fcm (mean strength
of
concrete) in order from lowest to highest strength. (3)
(b) Approximately, what is the tensile strength of concrete as
a
percentage of its compressive strength? (1)
(c) Draw and name all necessary reinforcement for the simply
supported
beam and static loading case shown at Figure 3a. (6)
(d) Recreate the table in Figure 3b in your script books and fill
in by
writing “Poor” and “Good” words to describe the property of
the
material.
In: Civil Engineering
What document summarizes the financial position of the construction company?
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In: Civil Engineering
An oil company wishes to construct a pressurised pipeline of 300 mm diameter to convey freshwater, of bulk modulus 2.10x109 N/m2 from a desalination plant to a refinery at a rate of 350 l/s and with a pipe period of 4 seconds. Calculate the corresponding theoretical surge pressure induced within the pipeline by the complete closure of an on-line valve (located at the end of the pipe) in 8 seconds. The valve generates non-uniform retardation of type R = At0.65. The steel pipe has 5 mm thick walls, a Young’s modulus of 2.1x1011 N/m2 and Poisson’s ratio of 0.28. Calculate the pressure transients at the valve in the pipeline, for the first 12 seconds after the valve starts to close. Assume that pipe is longitudinally restrained.
In: Civil Engineering
In: Civil Engineering
What sort of actions could the company has undertaken to protect the 3rd party audit ? and What detail should you provide to OSHA when discussing the audit findings?
In: Civil Engineering
Q1. For the given velocity distribution in a pipe:
where v(r)=velocity at a distance r from the centerline of the
pipe, V0=centerline velocity, and R=radius of the pipe.
Find the average velocity, energy and momentum correction
factors.
In: Civil Engineering
a. the modulus of elasticity of the reinforced concrete
b. the load carried by each of the steel and plain concrete
c. the minimum required cross-sectional area of the column given that the allowable compressive stress of plain concrete is 20 MPa and that the allowable compressive stress of plain concrete will be reached before that of steel.
d. Plot the stress-strain behavior for the steel fiber, concrete and composite on the same plot.
In: Civil Engineering
5. You are planning a water supply scheme in an area where you have both surface and sub-surface water resources. Disucss the factors which you will take into account to seclect one of the soruces for your scheme/project.
In: Civil Engineering
Two fuel storage tanks will be placed at an oil refinery near Bakersfield. The tanks are 10 m in diameter, are spaced center-to-center at 15 m, and contain fuel that has a Gs=0.95. The height of the fuel in the tanks is 4 m. Determine the stress change in the soil below the tanks at 4 locations: a) beneath the centerline between the tanks, b) beneath the edge closest to the other tank, c) beneath the center of one tank, and d) beneath the far edge of the tank. These calculation need to be carried out for a depth of 10 m. Assume the base of the tanks rests on the ground surface (no embedment), that the water table is very deep, and the unit weight is 18 kN/m3 .
In: Civil Engineering
A crossing track was constructed over a water channel with a total length of 1700 m and width of 40 m. If you know that the maximum flow that can be carried by the water channel is 400 m3/s over a 25-year storm event. Calculate:
a. The probability that the crossing track will flood next
year.
b. The probability that the crossing track will flood at least once in the next 12 years.
c. The probability that the crossing track will not flood in the next 12 years.
d. The probability that the crossing track will flood exactly 5 times in the next 12 years. e. The probability that the crossing track will flood at least three times in the next 250 years.
In: Civil Engineering
A single-storey brick veneer house (single layer of brick on a timber frame) has a front corner lounge-room with a floorplan measuring 4.0 m by 3.8 m. The ceiling is 3.0 m high. The building fabric of the two exterior walls comprises a 12 mm thick layer of plaster, a 100 mm air gap and the exterior house bricks (110 mm thick). One of these walls has a window measuring 2.7 m wide by 1.35 m high, featuring a 3-mm thick glass pane installed in the mid-1950s. The floor is carpet over 19 mm thick pine floorboards, and the house is on stumps with a ventilated air gap between the ground and the floorboards. The ceiling is 12 mm plasterboard covered with a 50 mm thick layer of loose fill insulation in the roof cavity. This house is located in suburban Melbourne.
Estimate the cost to heat the interior of this room to 21°C all year round using a mid-level residential gas central heating system. Assume the under-floor and roof cavity temperatures are equal to the outside temperature.
In: Civil Engineering
A building company has been awarded the contract to undertake the construction works for a multi-storey office project in a city centre location. A deep basement is to be installed under one half of the building, within a layer of dense gravel.
The site is surrounded by public roads and buildings on all sides and it is expected that the water table is extremely close to the ground surface on a year-round basis.
You have been asked by the contractor to advise their company with regard to a number of issues on the project, in advance of the construction works.
(a) What details would you provide to the contractor in relation to the options and methods available to dewater the soil on the project, to facilitate both the basement construction and trench excavations for utility ducting installation on the site? How would the range of dewatering methods be combined to produce a suitable solution?
(b) Given the basic information available in relation to the location and ground conditions on this site, describe the particular options that you would recommend to the contractor for use on this specific site to assist in supporting the sides of the deep excavations during the basement construction.
In: Civil Engineering
Procedure in lab work (without explanation) with formula to find the given properties of fluid:
1.Density, ρ
2.Specific Density, γ
3.Specific Gravity, sg
4.Dynamic Viscosity, μ
5.Kinematic Viscosity, η
In: Civil Engineering
Assessment 9.0: Soil Mechanics Produce a 300 word report which identifies the cause and effect of slips in embankments and cuttings and the affect it might have on safety of the line. The report should include the theory behind soil mechanics – soil saturation, subsidence, inappropriate mineral extraction, overloading of embankment by neighbouring construction and subterranean fires. Include a range of potential solutions to embankment stability risks.
Would prefer in Text as don't understand the handwriting on here.
In: Civil Engineering
1. Design a simply supported slab resting on masonry walls of
thickness 250mm
each with its opposite edges supported (L = 4.75m). Take concrete
grade
32MPa; steel grade 500N; permanent load (G) = 1.5kPa; imposed load
(Q) =
2kPa; ψs = 0.7 & ψl
= 0.4; γconc = 25kN/m3
; ∆=span/500 (HOMEWORK)
In: Civil Engineering