Contact Us

Comments

Post a Comment

Popular posts from this blog

Design of a singly reinforced concrete beam as per IS 456:2000

Image
Design of a singly reinforced concrete beam Example: Design of a singly reinforced concrete beam for the following data.           Clear Span of the beam – 3 m           Width of supports – 200 mm           Working live load – 6 KN/m           Grade of concrete – M20           Grade of steel – Fe-415 HYSD bars Solution: Given Data –   f ck  = 20 N/mm 2 .                         f y    = 415 N/mm 2 .                                                 Load factor = 1...
Read more

Classification of columns

Image
  Types of columns & their properties Structural Concrete member in compression are generally termed as columns & strut. The term column is used for structural member transferring loads to the ground. As per Indian Standard Code IS 456:2000 clause 25.1.1 defines the column as a compression member whose effective length exceeds three times the least lateral dimension. Whereas pedestal is termed as vertical compression members whose effective length is less than three times its least lateral dimension. Axially loaded columns may fail in any one of the following modes: Pure Compression failure- Where the column generally fails due to the axial load & Buldge at the center of the unsupported length. Combined Compression & bending failure- Where the column generally fails due to the combined effect of axial load & bending due to the presence of beams.   Failure by elastic instability. These modes generally depend on the slenderness ratio of ...
Read more

History of light weight concrete

Image
Ancient Applications Known history of the use of lightweight concrete starts more than two thousand years ago in the Roman Empire. The most significant examples of that time were the Port of Cosa, the Pantheon Dome and the Colosseum (ACI Committee 213, 2003). The Port of Cosa was built on the west coast of Italy, in 273 B.C. The structural designers of the port were aware of the fact that lightweight aggregates were more convenient to use in marine structures. Instead of using locally available aggregates (beach sand and gravel) for the construction, the builders have brought natural lightweight aggregates (pumice and scoria) from the volcanic resources which were located around 40 km away from the Port of Cosa. The harbour consists of four piers, which had resisted the forces of nature except the surface abrasion for almost 2 thousand years and it is now abandoned only due to siltation (ACI Committee 213, 2003). The construction of the Pantheon was completed in 27 B.C. It has...
Read more