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

What is the meaning of concordant prestressing, Concordant Prestressing ...

Concordant Prestressing In this type of prestressing, tendons follow a concordant profile. The concordant profile of  tendons does not change the support reactions in a statica

Theodolote, List out the permanent adjustments of dumpy level.

List out the permanent adjustments of dumpy level.

P.h.e, procedure for designing of sewage scheme

procedure for designing of sewage scheme

Assignment, information of cement types

information of cement types

Relief features, characteristics of ridge characteristics of escarpment cha...

characteristics of ridge characteristics of escarpment characteristics of plateau characteristics of knoll characteristics of conical hill

Main advantages of using rubber dams, Question In assortment of dams in...

Question In assortment of dams in drainage channels, what are the main advantages of using rubber dams instead of steel-gate dams ? Answer Key Advantages of rubber d

#title.long span truss design, what are the step by step process of designi...

what are the step by step process of designing steel long span trusses?

Settlement due to increasing load on surrounding soil, Q. Settlement due to...

Q. Settlement due to Increasing Load on Surrounding Soil? When any portion of the ground surface  has been loaded, it causes  the surface  of adjacent soil also to tilt and set

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