Category: Articles
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Difference Between Short Column & Long Column
Difference No.1 Short Column: A column is considered to be short if the ratio of effective length to its least lateral dimension is less than or equal to 12. It’s buckling tendency is very low. Long Column: A column is considered to be long if the ratio of effective length of column to its least…
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Ultra-High Performance Concrete (UHPC)
Ultra-High Performance Concrete (UHPC) is a cementitious, concrete material that has a minimum specified compressive strength of 17,000 pounds per square inch (120 MPa) with specified durability, tensile ductility and toughness requirements; fibers are generally included in the mixture to achieve specified requirements.Ultra-High Performance Concrete (UHPC), is also known as reactive powder concrete (RPC). The…
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Equilibrium Torsion & Compatibility Torsion
Equilibrium Torsion Equilibrium Torsion occurs when the torsional moment is required to be in equilibrium and maximum torsional moment (Tu) cannot be reduced by redistribution of moments. In this case the torsion reinforcement must be provided to resist all of Tu. This type of torsion is also known as primary torsion. In Etabs or other…
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Proper Rebar Placement in Construction Site
We need to be careful about Rebar placement in construction site. We need to know which direction bar will be at bottom & which direction bar will be on top at the same layer of reinforcement. Placement of rebar depends on tension/bending along the direction. For example, in Spread footing more tension developed in long…
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What is the difference between thin and thick shell?
Shell problems generally fall into one of two categories: thin shell problems and thick shell problems. Thick shell problems assume that the effects of transverse shear deformation are important to the solution. Thin shell problems, on the other hand, assume that transverse shear deformation is small enough to be neglected. The inclusion of transverse shear…
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What is the mechanism for such structures?Are they safe?
We generally see a large portion of Slab is overhanged in different structure. We raise question how such large cantilever is safe? We think really these are cantilever, but actually these are not. Their mechanism is different. See the following picture: The structure is having mechanism of truss system. Slabs, inclined members & columns are…
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Advantage of Hollow Section over I Section
The only advantage of hollow section over I section is resistance against torsion. Most of the material is present away from center of mass of the section. To resist torsion we need maximum portion of material away from its center. Take the center of hollow section and draw a line away from its center and…
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Types, Reasons & Prevention of Column Failures
We know generally Columns are axially loaded members in structure. It carries compression force due to gravity loads of the structure. Column fails for different reasons. There are mainly three types of failures occur in columns. These are- 1.Compressive Failure 2.Buckling Failure 3.Shear Failure Now let’s discuss about the failure types in details & reason…
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All about Burj Khalifa and Reference CAD File of Floor Plans
The Burj Khalifa known as the Burj Dubai prior to its inauguration in 2010, is a skyscraper in Dubai, United Arab Emirates. With a total height of 829.8 m (2,722 ft, just over half a mile) and a roof height (excluding antenna, but including a 244 m spire of 828 m (2,717 ft), the Burj Khalifa has been the tallest structure and building in the world since its topping out in…
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Difference between Flat slab and Flat plate slab
Slab directly supported on columns without beams are called Flat slabs or flat plates. 86-Year-Old Bodybuilder Becomes Oldest to Ever Compete in Japan parabolan steroid bodybuilder cedric mcmillan dead at the age of 44 Followings are the difference between Flat slab and Flat plate slab: Serial No. Flat Slab Flat Plate Slab 1 Flat…