What is thermo-electric prestressing, Civil Engineering

Assignment Help:

What is Thermo-electric prestressing

We know that, stretched tendons are used in prestressed concrete. Stretching of tendons may be accomplished by using jacks or by other means. Thermo-electric prestressing is just another method of stretching the tendon wiers. We know that if we increase the temperature of a metal, it expands. As the name suggests, in Thermo-electric prestressing, temperature of tendon wires is increased by passing electric current for a short duration. This temperature increase, taking place within 3-5 minutes, may be of an order of 300-400°C. The bars, which may undergo an expansion of about 0.4-0.5% in length, try to shorten at cooling butare checked by fixed anchors at the two ends. 


Related Discussions:- What is thermo-electric prestressing

Distomat, applications of distomat in briefly

applications of distomat in briefly

Measure the safe load on the pile, A wood pile of 10 m length is driven by ...

A wood pile of 10 m length is driven by a 1500 kg drop hammer falling by 3 m to a final set equal to 1.25 cm per blow. Measure the safe load on the pile using the Engineering Ne

What is the pre-tensioned concrete, What is the Pre-tensioned concrete ...

What is the Pre-tensioned concrete In Pre-tensioned concrete tendons are kept stretched with suitable mechanisms and concrete is cast into the forms through which stretched ten

Determine the loss of fluid energy, Determine the loss of fluid energy as 3...

Determine the loss of fluid energy as 310 gallons per minute (gpm) of water flows through 1,000 ft of 4 inch, schedule-40 welded and seamless steel pipe. The fluid temperature is 5

What do you mean by slip siding, Q.What do you mean by Slip Siding? If ...

Q.What do you mean by Slip Siding? If the Station yard is in a gradient steeper than 1 in 260 or there is a continuous falling gradient away from the station there is a possibi

Turbines, How do we get electricity even when the gates of a dam were close...

How do we get electricity even when the gates of a dam were closed?

Approach span to its neighbouring inner spans, Question-Why is span length...

Question-Why is span length ratio of end span, approach span to its neighbouring inner spans typically about 0.75?   Answer-From aesthetic point of view, odd number of span

Define special considerations for underwater inspection, Define Special con...

Define Special considerations for underwater inspection? Once a diver enters the water, there environment changes completely. Visibility decreases and is often reduced to near

Pre-stressing work, Under which situation shall engineers use jacking in ag...

Under which situation shall engineers use jacking in agreement end only and from both ends in pre-stressing work?

Analytical methods for pollutants under the clean water act, Analytical Met...

Analytical Methods for Pollutants Regulated Under the Clean Water Act? We suppose that you have knowledge of and access to the relevant analytical methods. These methods cover

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd