Civil construction

30/07/2022

https://www.youtube.com/watch?v=9MAXF5BejZQ

20/07/2018

02/11/2017

Based on their supporting systems, RCC are available with 4 different types :-

Simply supported beam or simple beam
Semi-continuous beam
Continuous beam, and
Cantilever beam.
Given below their brief definition :-

Simple beam: It consists of a single length. It is sustained with two supports at either ends.

Semi-continuous beam: This beam doesn't contain more than two lengths. It is sustained with not more than three supports. In technical term, it is called as a continuous beam.

Continuous beam: This type of beam contains over two spans and it is sustained with more than three supports along its length. The supports are provided in one perpendicular line thus the spans are also in a perpendicular line.

Cantilever beam: It contains one support in one end and another end is exposed.

Another sort of beam exists in civil engineering field that is known as over-hanging beam. This beam expands behind its supports. In fact, this beam is created with the amalgamation of simply supported and cantilever beam.

The above mentioned beams are very useful for civil engineering field as the majority of the technical factors of reinforcement disposition contained in these beam supporting systems.

06/01/2017

09/11/2016

The cable-stayed bridge was designed by the Shanghai Municipal Engineering Design Institute, Shanghai Urban Construction College, and Shanghai Urban Construction Design Institute, with assistance from Holger S. Svensson. It has a main span of 428 meters (1,388 ft), shorter than its sister bridge. It is the 57th longest cable-stayed bridge in the world, opened to the public in 1991.

08/08/2016

Gifford Udall System:

This system originated in Great Britain, is widely used in India. This is a single wire system. Each wire is stressed independently using a double acting jack. Any number of wires can be grouped together to form a cable in this system. There are two types of anchorage device in this system.

a) Tube anchorages

b) Plate anchorages

Tube anchorage consists of a bearing plate, anchor wedges and anchor grips. Anchor plate may be square or circular and have 8 or 12 tapered holes to accommodate the individual prestressing wires. These wires are locked into the tapered holes by means of anchor wedges. In addition, grout entry hole is also provided in the bearing plate for grouting. Anchor wedges are split cone wedges carrying serrations on its flat surface. There is a tube unit which is a fabricated steel component incorporating a thrust plate, a steel tube with a surrounding helix. This unit is attached to the end shutters and form an efficient cast-in component of the anchorage

31/07/2016

Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water. In 2015 hydropower generated 16.6% of the worlds total electricity and 70% of all renewable electricity, and is expected to increase about 3.1% each year for the next 25 years.

Hydropower is produced in 150 countries, with the Asia-Pacific region generating 33 percent of global hydropower in 2013. China is the largest hydroelectricity producer, with 920 TWh of production in 2013, representing 16.9 percent of domestic electricity use.