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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
What are required slump height of M20 for different concrete structure?
Required slump height of M20 for different concrete structures, are normally calculated by the required slump value, which would come out to be 100 lits.
In order to execute the Site As Per Bar Chart that is Site Planning
A Lumped-Mass matrix, can be obtained by placing point (concentrated) masses, m_i, at node points i in the directions of the assumed displacement degrees of freedom.
What are the obstacles to chain surveying?
Those are disturbing the line of measuring is called Obstacles. The actual length of the chain is become short or some time long. this error factor are removed by calculation after measuring the distance between then by as Total Distance = (difference in length of chain /original length of chain)* Measured Distance.
What is meaning of initial contract price of civil engineering project?
The Initial Contract Price is the Contract Price listed in the Procuring Entity's Letter of Acceptance.
What does daylight mean to a civil engineer?
when we undergo underground excavation ,some times it happens that cover above tunnel excavated part is not sufficient so it shows exposed surface and daylight comes inside ,such condition is called daylight condition.
What do you understand by site investigation?
Depending on the "site" or what is on the site on can infer that a thorough observation of the conditions of the site itself and it's components will be made.
What is meaning of FPS Brick in Civil Engineering?
The asnwer is Foot Pound Second Brick.
It is a remnant fo when England ruled India.
How do brittle and ductile materials differ in their behaviour in a compression test?
(a) Ductile materials: For ductile material such as mild steel, the load Vs compression diagram would be as follows
(1) The ductile materials such as steel, Aluminum, and copper have stress - strain diagrams similar to ones which we have for tensile test, there would be an elastic range which is then followed by a plastic region.
(2) The ductile materials (steel, Aluminum, copper) proportional limits in compression test are very much close to those in tension.
(3) In tension test, a specimen is being stretched, necking may occur, and ultimately fracture fakes place. On the other hand when a small specimen of the ductile material is compressed, it begins to bulge on sides and becomes barrel shaped as shown in the figure above. With increasing load, the specimen is flattened out, thus offering increased resistance to further shortening ( which means that the stress - strains curve goes upward ) this effect is indicated in the diagram.
Brittle materials ( in compression test )
Brittle materials in compression typically have an initial linear region followed by a region in which the shortening increases at a higher rate than does the load. Thus, the compression stress - strain diagram has a shape that is similar to the shape of the tensile diagram.
However, brittle materials usually reach much higher ultimate stresses in compression than in tension.
For cast iron, the shape may be like this
Brittle materials in compression behave elastically up to certain load, and then fail suddenly by splitting or by craking in the way as shown in figure. The brittle fracture is performed by separation and is not accompanied by noticeable plastic deformation.
A wind girt is a structural member within a wall that provides additional strength to a wall in order to resist the forces on a wall as a result of wind pressure. Wind girts are primarily metal, wood or reinforced concrete and usually match the type of material used for the rest of the structure. Wind girts typically run horizontally between two vertical framing members or columns although wind girts can run vertically. The number of wind girts in a wall vary by the bending strength of the wind girt, the height of the wall, the distance between the vertical structural members, and the maximum speed of the wind that the wall is exposed to. Wind girts are designed to counteract both positive (pushing) pressure (windward side) and negative (sucking) pressure (leeward side) that is exerted on the structure. Wind girts generally provide a fastening point for interior and exterior surface materials.
What is the recommended thickness of lift slabs?
Slab thickness is usually 7―" due to mechanical ducts located within the
slab. This could be reduced to 6―" if the mechanical ducts are placed in a "bulk head".
Why compressive strength is always greater than tensile strength in a beam?
Compressive strength is greater than tensile strength not just in beams, but in metals, concrete, ceramics, ice, and many other materials.
Consider a uniaxial test of tension or compression. Because the cross-sectional area of the sample increases with the load, the stress is actually lower than what we would expect from dividing the load by the area of an unloaded sample. The opposite is true for a tension test. The cross section gets smaller with increasing load. Remember this is true regardless of whether the deformations are reversible and elastic or irreversible and plastic. Therefore the nominal compressive strength is greater than the nominal tensile strength even in a perfectly isotropic material.
The word "grading" refers to the diversity in size of the aggregates. Aggregates that have "good grading" or are "well graded" have the same % of each size stone. The goal is to get the maximum aggregate packing density within a mix that still allows the cement to bond to the aggregates and cure properly, since its the aggregates that give concrete its high compressive strength.
What is sacrificial thickness?
This is known as clear cover. This is given for giving a protection to the inside reinforcement to prevent it from corrosion.
Why tensile strength is higher than shear strength?
because of how the molecules are arranged, most materials are a lot stronger in tension than in shear. This is not true for all materials, like chalk or concrete, which are much stronger in shear than in tension.
Are moment of resistance and section modulus the same?
Yes, it is.
Moment of resistance, usually denoted as W is a term in structural engineering. It is found from the moment of inertia I and the distance from the outside of the object concerned to its major axis e. W = I/e
It is used in structural calculations since the stress can be written as stress=moment/W
Section modulus (Rigidity) : The ratio of moment of Inertia of the section (I) to the distance from it neutral axis to the most remote fiber (c)
I am not an engineer and I never studied any of this properly, but as far as I can see, it's two names for the same thing.
I was able to calculate successfully the moment of resistance from the (moment of inertia) / (distance from the outside of the section (on the same x/y axis) to the center)
which means I must be getting it right.
What is the comparison of astm a36 to en 10025 grade of steel?
Yes both are same whwn you campier all phy & chem proprieties
