Which type of pile cap transfers loads equally to piles, Civil Engineering

Assignment Help:

Q. Which type of pile cap transfers loads equally to piles, flexible pile cap orrigid pile cap?

Loads from columns transferring to pile cap persuade tensile forces at the bottom of the cap. For example by using truss analogy to analyse a pile cap sitting on two piles with a column at the centre of pile cap, tensile force at the bottom is proportional to pile spacing and is inversely proportional to depth of pile cap. Bottom reinforcement is designed to resist tensile stressed produced from loads in columns. Occasionally reinforcement can be designed at the top of pile caps that serve as compression reinforcement. This kind of reinforcement is essential in case there is a limitation on the depth of pile caps. In the same way shear reinforcement is introduced to the pile caps in case there is a restriction to the depth of pile caps. 

Consider that loads are applied at the centre of a pile cap.

For the case of rigid pile cap, due to the effect of interaction of individual piles, central piles tend to settle more than edge piles when pile cap is under loading condition. For the pile cap to be rigid, local deformation of central piles wouldn't take place. In its placestiff pile cap would transfer the loads from central piles and redistribute them to outer piles. So piles at the edge take up a higher fraction of total loads and are subjected to higher axial and bending loads in case the pile cap is stiff. In the extreme case, side piles may take up as much as about two to three times loads in the central piles and this may lead to failure of these edge piles. 

For flexible pile cap, load taken up by individual piles are different since the deformation of pile cap enhances non-uniform distribution of loads among piles. Piles closer to the load tend to share more loads when compared with those that are located far away from the loads. The difference of loads persuaded in piles increase with flexibility of pile cap.


Related Discussions:- Which type of pile cap transfers loads equally to piles

Pavement drainage, Pavement Drainage: Water enters the pavement layer...

Pavement Drainage: Water enters the pavement layers through cracks, joints and open spaces in the pavement surface. The water reaches the soil sub-grade on which the pavement

Explain pressure balance method and compressed air method, Pressure balance...

Pressure balance method vs. compressed air method in pipe jacking Pressure balance method generally requires the use of mechanically operated tunnel-boring machine at its cutti

Properties of timber, Properties  of Timber Properties of good timbers ...

Properties  of Timber Properties of good timbers are following: Color: color should be uniform. Odour: Odour should be pleasant when cut freshly. Soundness: A cl

Explain inspection tools for underwater inspection of bridge, Explain the I...

Explain the Inspection Tools for Underwater Inspection of Bridge? So many Inspection tools are available. The dive team should have access to the suitable tools and equipments

Shear force and bending moment, relation between shear force and bending mo...

relation between shear force and bending moment and examples based on those relationship

What is the absolute maximum shear stress, A strip load of considerable len...

A strip load of considerable length and 1.5 m width transmits a pressure of 150 kN/m 2 to the underlying soil. Verify the maximum principal stress at 0.75 m depth below the footin

TicketID: EM135335A06, I only want Part 1 of this order, can you adjust the...

I only want Part 1 of this order, can you adjust the quote?

Determine the water-cement ratio, A concrete batch plant provided the Desig...

A concrete batch plant provided the Design Strength for the engineer's mix design to match the project's specification requirement for a 4000 psi Tremie pump mix.  The Water-cement

Consultant , how to convert a varying distributed load to a uniformly distr...

how to convert a varying distributed load to a uniformly distributed load

Hydraulic design problems, This assignment is a Hydraulic Design assignment...

This assignment is a Hydraulic Design assignment for Civil Engineering Major in USA. Please try if there is someone professional who can do this work because it''s too sensitive. f

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