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

Calculate the benefit-cost analysis ratio, Calculate the Benefit-Cost Analy...

Calculate the Benefit-Cost Analysis Ratio A city engineer is deciding which of two alternatives to select.  If the interest rate is 10% per year, the Benefit-Cost analysis rat

What do you mean by shallow gradient of pipes, Q. Colebrook White formula s...

Q. Colebrook White formula suitable for shallow gradient of pipes? Manning's Equation is commonly used for rough turbulent flow while Colebrook-White Equation is adopted for t

Explain rigging , In sailing, the ropes used to move the sails around so th...

In sailing, the ropes used to move the sails around so the boat will move in the right direction when the wind blows.

Functions components of a typical expansion joint, Question What are the fu...

Question What are the functions components of a typical expansion joint ? Answer In a characteristic expansion joint, it normally contains following mechanism-joint sealant, jo

Timber design, design of timber in flexural members in terms of extreme fib...

design of timber in flexural members in terms of extreme fibre stress in bending, maximum horizontal shear stress, deflection and bearing stress perpendicular to the grain. the ful

Premix road, plz tell me the ratio of sand,aggregate,and asphalt.pl tell me...

plz tell me the ratio of sand,aggregate,and asphalt.pl tell me the mm of aggregate

Calculate the degree of saturation of the soil, A clay sample, having its n...

A clay sample, having its natural moisture content, weighs 0.333 N. The specific gravity of solids of this soil is 2.70. After oven-drying, the soil sample weighs 0.2025 N. The vol

What is absolute pressure, Absolute pressure is simply the addition of the ...

Absolute pressure is simply the addition of the observed gage pressure plus the value of the local atmospheric pressure.

Plastic, what is plastic?its types and composition and its uses as engineer...

what is plastic?its types and composition and its uses as engineering material

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