Define the shock transmission unit, Civil Engineering

Assignment Help:

Define the Shock Transmission Unit?

Ever since engineers have started designing multi span simply supported bridges, they have been dreaming of connecting all the spans together to distribute seismic loads to more than one pier during an earthquake or other sudden loadings. Thus, the peaks due to sudden force is considerably reduced. One possible solution to this requirement could be continuous construction of bridges so that a large number of piers can participate in load sharing during earthquake. But the requirement of size of expansion joint in such an arrangement would be extraordinarily large and thus not feasible. The other solution has been provided by Shock Transmission Unit (STU) or Lock Up Device (LUD).

It is a simple device which is designed to be connected between superstructure and substructure of a bridge to form a temporary rigid link. The peculiar feature of this device is that it forms a rigid link only under rapidly applied loads such as braking and seismic forces whereas under slowly applied loads such as temperature, creep, shrinkage etc, it allows the free movement. STU, thus, allows load sharing in case of suddenly applied short duration horizontal loads. The unit is connected near the bearing between the superstructure and substructure. It works on principle that rapid passage of viscous fluid through a narrow gap generates considerable resistance while slow passage through the same gap only minor resistance.

In this figure e1 and e2 are the movements accommodated in STU due to superstructure and substructure respectively.


Related Discussions:- Define the shock transmission unit

Steel truss 15 m span, types of truss of 15 m cantilever with 1000 kg on fr...

types of truss of 15 m cantilever with 1000 kg on free end. May be steel or any lightest material aluminium anodized truss. thanks

Define storms - underwater inspection of bridge, Define Storms - underwater...

Define Storms - underwater inspection of bridge? Storms can have a detrimental effect on bridge substructure. The velocity and depth of water and debris carried increase in rel

Compute the ultimate settlement, A 2 m wide strip footing is to be constru...

A 2 m wide strip footing is to be constructed in a sandy stratum of 2 m thick. The depth of the footing is 1 m below ground surface. The sand layer is underlain by lm thick cla

. determine the permeability of the aquifer, An unconfined aquifer is calle...

An unconfined aquifer is called to be 32 m thick below the water table. A constant discharge of 2 cubic metres per minute is pumped out of the aquifer by a tubewell till the water

Define the meaning of tensile stresses, Tensile stresses It has been po...

Tensile stresses It has been possible to introduce tensile stresses of upto 850 N/mm 2 in tendons with the use of this method. But the method is not suited in situations where

Construction of the building, a) Certain data for the materials used in the...

a) Certain data for the materials used in the construction of the building, e,g, insulation, building materials, air spaces, etc.  b)  Draw, with appropriate dimensions, the cro

Explain plate loading test, Q. Explain Plate loading test? In general i...

Q. Explain Plate loading test? In general iron plates either 60 cm squares or 75 cm dia and 16 mm thick are used, size of plate should not be less then 1/5th of the width of f

Civil, vcdjvoidj pirioi oique

vcdjvoidj pirioi oique

Solid mensuration, the base of an isosceles triangle and the altitude is dr...

the base of an isosceles triangle and the altitude is drawn from one of the congruent sides are equal to 18cm and 15cm , respectively . Find the lenghts of the sides of the triangl

What are moment of inertia, The moment of inertia calculates the opposition...

The moment of inertia calculates the opposition any kind of body will have against a certain momentum (along that similar axis) trying to rotate that body.

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