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Civil Engineering
Civil Engineering is a profession of designing and executing structural works that serve the general public, like houses, buildings, roads, etc. A Civil Engineer is an engineer trained in the design and construction of public works, such as bridges or dams, and other large facilities.
4,921 Questions
RCC that is reinforced cement concrete which is composed of cement(mainly),sand(fine aggregate),metal(coarse aggregate)and water.Which is further more supported by iron which makes it RCC from ordinary cement concrete.
How do you calculate the steel quantity for circular slab?
Assume area of circle= area of square
πd2/4=L2
L=0.88263 x d
Deduct the cover from L from both sides. This will be length of bar
500W in steel bar means this steel yields 500MPa strength
Why is there a time delay in an oil safety control?
Generally oil safety switches sense the oil pressure. If there is no preset pressure then the oil safety switch acts (to switch off or cut off the device) For an equipment that needs to be protected against the low oil pressure, such switches are used. when the equipment is standstill (or not running) then the oil pressure is also zero. When the equipment starts running, during the initial few seconds the oil pressure builds up from zero to required pressure. The timer is required not to cut off the equipment control in this initial few seconds. Control system waits for few seconds allowing the pressure to build up and after the preset time, if the pressure does not build up then it switches off the equipment since running the equipment with oil pressure is not good for the equipment.
It is the type of beam whose depth is equal or greater the slab but its top level is equal to slab.
Engr A.haseeb
What is the importance of standard consistency test?
by standard consistency test we determine standard consistency of cement which is denoted by p. as we know standard consistency value for a cement its value is used for making the paste for determining setting time, soundness, compressive strength of cement
How do you calculate fixed end moment for cantilever beam with uniformly distributed load?
I'm not sure if you're asking for just the equation for the reactions, or how to calculate the FEM of a cantilever via the Moment Distribution method (aka Hardy Cross method), so I'll anser both.
If you assume clockwise moments are negative...
If your cantilevered span has a length "L", and a uniform load "W" acting downward along the entirelength of the span, then the fixed end moment is (W*L2)/8
If the fixed end is to the left, the equation is positive (the load is acting clockwise, so the reacting FEM is counter-clockwise, therefore positive.) If the fixed end is on the right, the equation becomes -(W*L2)/8
If your uniform load W is acting downward, and is acting along length "d" (which is NOT the entire span), its easiest to convert the uniform load W to a point load "P", where P = W*d
Then your FEM = [P*a*b*(2*L-a)]/(2*L2)
where:
L = entire length of span
a = distance P is acting from the fixed end,
b = distance P is acting from the cantilevered end (also, b = L - a)
OR, if W is centered along the span (therefore Pis also centered), then the equation becomes (3*P*L)/16
When going through the distributive process, the cantilevered end will ALWAYS have a final moment of zero. At the fixed point, the cantilevered side has a distribution factor of zero, while the other side has a D.F. of one. So, if you have length ABCD, where A is a cantelever, and B, C and D are assumed fixed, FEMAB = 0, D.F.BA = 0, D.F.BC = 1, and D.F.CB = D.F.CD = D.F.DC = 0.5
So what ends up happening is that the final FEM for the cantilever ("AB") is zero, and the opposite end of the span ("BA") remains as its initial value. The reason for this is when you sum up the reactions at the point (in this case B) supporting the cantilever and flip the sign, the distribution factors tell you to distribute everything to the side of the support opposite the cantilever ( -(FEMBA + FEMBC) is added to FEMBC). So you can go through the Cross Method as normal, but you don't touch AB or BA, and BC is adjusted only the once that I just mentioned (you don't carry over the 1/2 reactions from CB).
What and where is the neutral layer in a beam that supports a load?
The neutral layer is a beam that supports a load is in the region where there is neither stretching nor compression.
Is it tension or compression that strengthens an arch that supports the load?
compression: the keystone in particular is under rather high compression forces.
Hume pipe Culvert is a cross drainage work or small bridge used to pass flood water through one or number of Precast RCC Hume pipes laid soil.
What is fixed end connections in the beam?
"Fixed" means that the ends cannot translate and cannot rotate.
"Pinned" means that the ends cannot translate but can rotate.
Why are railroad tracks built with a flexible expansion and contraction joint?
The tracks have a larger coefficient of linear expansion than the ground beneath.
What is MC-30 cutback asphalt?
Out of three types of cutback asphalt, MC is medium curing type.
Other than MC, there are RC (Rapid Curing) and SC (Slow Curing).
What is the effect of grading of aggregate on workability?
Grading of Aggregates enhances workability of concrete.
What is the effect of platen restraint?
when concrete specimens(cube or cylinders) is compressed, lateral shear stress is developped. But near the area, where specimen is in touch with plates of compression machine, this lateral shear stress is reduced and forces the specimen not to increase area. Thia is called Platen Restrain Effect.
What is the definition of RCC column starter?
Starter may be defined as a base structure before casting of column to keep column in fixed position and to erect form-work.
A riveted joint known as Lozenge
joint used for roof, bridge work or girders
etc. In such a joint,
*diamond riveting is employed so that the
joint is made of uniform strength.
What is the difference between pile and pillar?
pile is a type of footing,its necessary where the soil strength is low quality,AND piller is a vertical structure which carrying load from slab and pass to footing,its also known as COLUMN.
What are the advantages of Laterite blocks?
Strength and durability of cement-stabilized laterite hollow blocks made with laterite soils at three different locations in Edo State were studied. To this end, blocks were produced with water content at about the optimum moisture with varying percentages of cement from 3% to 15% at 2% increments and compactive pressures ranging from 3.44 N/mm2 to 17.20 N/mm2. The result showed that for 7% cement content and 13.76 N/mm2 compactive pressure, blocks of strength of at least 2.0N/mm2 at 28 days, could be produced. The blocks showed no features of wear after exposure to rain with weight losses within permissible limits after 12-cycles of wetting-brushing-drying. Cost analysis showed that laterite blocks have 40% cost advantage over similar sandcrete blocks.
ADAVANTAGES: Strength • durability • cement • stabilization • laterites
