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, A No 10 steel rebar is tested in tension by monitoring the load read...

A No 10 steel rebar is tested in tension by monitoring the load reading of the testing machine it was found that the specimen yielded at aload of 41600lb and fractured at 48300 lb

Deflectin of beam, simply supported beam with point load at the centre

simply supported beam with point load at the centre

Ghgh, Ask quhestion #Minimum 100 words accepted#

Ask quhestion #Minimum 100 words accepted#

Construction - concrete pavement, Construction: Construction is usual...

Construction: Construction is usually done by one of the three methods: (a) Manual method, providing steel or wooden forms, pouring concrete and compacting by means of nee

Timber, What is exogenous tree?

What is exogenous tree?

Compacted thickness of bituminous pavement, Q. Compacted thickness of bitum...

Q. Compacted thickness of bituminous pavement? The choice of compacted thickness is closely related to the nominal maximum size of aggregates of bituminous materials. Based on

Steel tubular marine piles, Question Give genuine reason that why are ...

Question Give genuine reason that why are steel tubular marine piles often driven open-ended? Answer In marine structure where piles are constantly topic to major la

Deflections of bars, how do one uses the Macauleys model to find deflection...

how do one uses the Macauleys model to find deflections of bars

Human values, give the two aspects of honesty& explain

give the two aspects of honesty& explain

Culverts - causeway and bridges, Culverts, Causeway and Bridges: Roads...

Culverts, Causeway and Bridges: Roads have to cross several natural streams like - rivers and canals. They also have to cross railway lines and cross-roads. The structures nee

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