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

State the needs for high strength steel and concrete, State the Needs for h...

State the Needs for high strength steel and concrete In  prestressed  concrete construction, tendons have 3  small area of cross-section compared  to the cross-sectional  area

Design volume of the aeration basin - sewer construction, Design volume of ...

Design volume of the aeration basin - sewer construction: Problem: What is the design volume of the aeration basin? Solution Assuming that 30% of the plant influe

Contours, how can you draw contours of a non square grid?

how can you draw contours of a non square grid?

Difference between direct circulation and reverse drilling, Question Wh...

Question What is main difference between direct circulation drilling and reverse circulation drilling? Answer In straight circulation drilling and reverse circulati

What is rapid sand filter, Q. What is Rapid Sand Filter? A Rapid Sand F...

Q. What is Rapid Sand Filter? A Rapid Sand Filter is a water treatment plant that includes provision for pre treating the water by coagulation and sedimentation for settlement

Parallel pipe systems or multipath pipeline problems, Parallel Pipe Systems...

Parallel Pipe Systems or Multipath Pipeline Problems Two or more sections of piping (branches) of different diameters, lengths and/or pipe materials originating and terminating

Quadratics.., applying quadratics in civil engineering

applying quadratics in civil engineering

Simple bending, In case of simple bending after simply supported beam, deri...

In case of simple bending after simply supported beam, derive that M/I = s /y = E/R.

Load and loa effects, AFor the given reinforced concrete moment frame schoo...

AFor the given reinforced concrete moment frame school building determine; 1. The wind load acting on the middle truss in the roof truss assembly. 2. The net wind pressure (Wnet) o

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