Structural Engineering
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What is Castellated Beam?
fathima
The castellated beam is a rolled steel beam that has an expended section that allows a predetermined hexagonal pattern to be cut directly on the webs of the beams. Castellated beam geometric properties are typically thinner than a standard steel rolled beam. WHY CASTELLATED BEAM USE COST SAVINGS THIRead more
The castellated beam is a rolled steel beam that has an expended section that allows a predetermined hexagonal pattern to be cut directly on the webs of the beams. Castellated beam geometric properties are typically thinner than a standard steel rolled beam.
WHY CASTELLATED BEAM USE
See lessWhat is use of ILD diagram at site?
Kuldeep Singh
ILD or Influence Line Diagram shows us the effect of a point load at some point on a structural member with respect to the position of the load. So, ILD tells us what and where would be the maximum effect of a load places at what location. So to visualize the worst-case scenario and best-case scenarRead more
ILD or Influence Line Diagram shows us the effect of a point load at some point on a structural member with respect to the position of the load.
So, ILD tells us what and where would be the maximum effect of a load places at what location. So to visualize the worst-case scenario and best-case scenario and the variations I between, ILD is a comprehensive aid.
The most common usage is in Bridges, rail tracks, and roads where loads are always pointed loads (axle loads) and always moving. Knowing when and how much will be the maximum effect like bending moment, shear force, etc. helps us set up the design values.
See lessWhat is the compressive strength of Fe500 rebars?
Kuldeep Singh
It is generally assumed to be 250 MPa.
It is generally assumed to be 250 MPa.
See lessWhat is fatigue in any structural member?
Himanshu joshi
Fatigue is a condition in which material is subjected to cyclic or reverse loading, and the material will fail when it's no of the designed cycle is over. Fatigue strength study is generally carried out in the case of the machine, and 80-85% of material failure in the machine is done fatigue failureRead more
Fatigue is a condition in which material is subjected to cyclic or reverse loading, and the material will fail when it’s no of the designed cycle is over. Fatigue strength study is generally carried out in the case of the machine, and 80-85% of material failure in the machine is done fatigue failure.
See lessThe fatigue strength is found such that material can withstand maximum no of reverse Cycles.
Why we provide Anchor Bar in a single RC beam?
fathima
Anchor bars provided for the compression side of single RC beams. It is provided to hold or support transverse reinforcement bars.
Anchor bars provided for the compression side of single RC beams. It is provided to hold or support transverse reinforcement bars.
See lessWhy Earth pressure at rest is used for basement slab wall, bridge abutment?
Kuldeep Singh
Earth pressure at rest is used for the design of underground structures, be abutments, etc. because it is expected that there would be no lateral displacement in the soil mass after construction is complete and during the life of the structure. Also, if you test the earth pressure in the field arounRead more
Earth pressure at rest is used for the design of underground structures, be abutments, etc. because it is expected that there would be no lateral displacement in the soil mass after construction is complete and during the life of the structure.
Also, if you test the earth pressure in the field around these structures, it matches very well with the calculated earth pressure at rest for normally consolidated soils.
See lessWhat is murrum soil?
Preet Chovatiya
Murrum soil is a one form of lateritic soil (Clayey material) which is used in road surface in Africa region. It is not a rock. It is generally used in all over the world but major used in Africa region.
Murrum soil is a one form of lateritic soil (Clayey material) which is used in road surface in Africa region. It is not a rock.
It is generally used in all over the world but major used in Africa region.
See lessWhat are the benefits of T-beam in building compare to the ordinary beam?
Kuldeep Singh
T-beams are generally preferred to rectangular beams and L-beams. First of all, it performs better in bending since it has a higher second moment of inertia. The compressive load on the slab is shared by the flange of the T-beam (because it is cast monolithically with the slab), which increases theRead more
T-beams are generally preferred to rectangular beams and L-beams.
First of all, it performs better in bending since it has a higher second moment of inertia. The compressive load on the slab is shared by the flange of the T-beam (because it is cast monolithically with the slab), which increases the moment of resistance. This also reduces the need for additional compression reinforcement at the top. Rectangular beams are only singly reinforced in our textbooks. In practice, rectangular beams have to be reinforced doubly. Still, T-beams don’t need to.
The flange is more effective in bending and providing ductility. The web is more effective in shear. If you look at the stress distribution diagram of a T-beam, you’ll see that the bending stress is distributed more in the flange and shear stress more on the web. Hence, the resulting bending+shear is lower for any cross-section than in rectangular beams, where the two add up.
Due to the above two points, deflection is significantly reduced in the case of T-beams.
Also, we know that the concrete below the neutral axis is hardly contributing to the beam strength since it’s in tension. So why not remove it? The moment of resistance will be comparable for a rectangular beam and a T-beam with the same depth. Hence, T-beams are always more economical than rectangular beams. In fact, it is the least expensive among the common beam shapes except for box girders used in bridge decks.
T-beams have a lesser volume of concrete. Also, they reduce the floor to floor height since the flange is already part of the slab. These two things in combination significantly reduce the concrete required for the building, cutting down both cost and dead weight.
Lastly, T-beams are more convenient for pre-fabrication buildings.
See less