Explain shear stiffness in elastomeric bearing, Civil Engineering

Assignment Help:

Q. Explain Shear stiffness in elastomeric bearing?

For elastomeric bearing shear stiffness is a significant parameter for design since it influences the force transfer between bridge and its piers. Basically elastomers are flexible under shear deformation though it is relatively stiff in compression. Conversely elastomeric bearings must not be used in tension. 

Elastomeric bearing must be designed in serviceability limit state only. Cross sectional area is generally determined by the compressive stress limit under serviceability limit state. The shape factor it implies that the plan area of the laminar layer divided by area of perimeter free to bulge, affects the relation between shear stress and compressive load. Basically higher capacity of bearings can be obtained with higher shape factor. 

The long side of bearing is generally oriented parallel to the principle axis of rotation since it facilitates rotational movement. The thickness of bearings is limited and controlled by shear strain requirements. Basically the shear strain must be less than a certain limit to avoid the occurrence of rolling over at edges and delamination because of fatigue. Henceforth it follows that higher rotations and translations need thicker bearing. Instead the vertical stiffness of bearings is attained by inserting sufficient number of steelplates. Additionally checks must be made on combined compression and rotation to guard against possible occurrence of uplifting of corners of bearings under certain load combinations.


Related Discussions:- Explain shear stiffness in elastomeric bearing

Strength of materials, distribution of shear stress in triangular section

distribution of shear stress in triangular section

Scour, Q. What do you mean by Scour? Whenever a bridge crosses a waterw...

Q. What do you mean by Scour? Whenever a bridge crosses a waterway, even a small or intermittent one, scour is a dangerous effect that can damage bridge piers and undermine fou

Explain p trap, Q. Explain P Trap? Trap is a depressed or bent sanitary...

Q. Explain P Trap? Trap is a depressed or bent sanitary fittings which always remains full of water it is water seal. Its functions are to prevent passage of foul air or gas

Fluid mechanics, why converjent angle is greater than disconverjent angle

why converjent angle is greater than disconverjent angle

Purpose of dowel bars in elastomeric bearing, Q. Purpose of dowel bars in e...

Q. Purpose of dowel bars in elastomeric bearing? Elastomeric bearing is generallycategorized into two types: free andfixed. For fixed types bridge deck is permitted only to rot

Minor losses using th method of loss coefficients, Minor Losses Using Th Me...

Minor Losses Using Th Method of Loss Coefficients One method of calculating the energy loss as a result of fluid flowing through a device or fitting, each device or fitting has

Measure the stress increment, A raft of size 4 m × 4 m carries a uniform lo...

A raft of size 4 m × 4 m carries a uniform load of 200 kN/m 2 . Using the point load approximation with four equivalent point loads, measure the stress increment at a point in the

Bricks properties, what is the application of silica,aluminaand magnesium i...

what is the application of silica,aluminaand magnesium in bricks?

Explain the dupuit equations for unconfined aquifers, Explain the Dupuit Eq...

Explain the Dupuit Equations for Unconfined Aquifers   Using natural log: Q = ΠK((h 2 ) 2 - (h 1 ) 2 )/ln(r 2 /r 1 )  Using log 10 :   Q = K((h 2 ) 2 - (h 1 ) 2 )/((1055)l

Physical tests on cement, Physical Tests on Cement (a) Soundness Test: ...

Physical Tests on Cement (a) Soundness Test: by sieve analysis, it is conducted. 100 gms of cement is taken and sieved throughout IS sieve No. 9 for fifteen minutes. Residue on

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