Deflection in concrete structures, Civil Engineering

Assignment Help:

Tension reinforcement leads to increasing deflection in concrete structures?

In BS8110 a modification factor is applied to span/depth ratio to take into account effect of tension reinforcement. Actually deflection of concrete structure is affected by stress and amount of tension reinforcement. To understand their relationship let us consider the subsequent equation relating to beam curvature:

Curvature = 1/r = e/ (d-x)

Where r = radius of curvature

  e = tensile strain in tension reinforcement

  d = effective depth

  x = depth of neutral axis

Provided that tensile strain in tension reinforcement remains constant, curvature of concrete structure increases with depth of neutral axis. It is perceived that depth of neutral axis rises with tension steel ratio. Consequently curvature of concrete section is directly proportional to the tension steel ratio. Additionally, largervalue of the depth of neutral axis enhances increased area of concrete compression so that effect of creep on deflection appears to become significant.


Related Discussions:- Deflection in concrete structures

.., Ask questiPermanent Way:on #Minimum 100 words accepted#

Ask questiPermanent Way:on #Minimum 100 words accepted#

Acetylene gas cylinder for gas welding, Q. Acetylene gas cylinder for gas w...

Q. Acetylene gas cylinder for gas welding to be erected in upright position Acetylene gas is normally used for gas welding due to its simplicity in production and transportati

Define pneumatic tools for underwater inspection of bridge, Define Pneumati...

Define Pneumatic Tools for Underwater Inspection of Bridge? These are more efficient than hand tools and cause less diver fatigue. The disadvantages are that below about 20 m,

Changeable depth bridge decks, Question What is the sucker deck principle f...

Question What is the sucker deck principle for changeable depth bridge decks ? Answer For a variable depth bridge deck, depth of continuous multi-span bridge deck is greater tha

Illustrate the term - failure due to rupture of steel, Failure Due to Ruptu...

Failure Due to Rupture of Steel This mode of  failure is likely in lightly reinforced concrete members in which the ultimate strength of  steel is attained before the concrete

Use of PFA and GGBS, Q. Use of PFA and GGBS? Both PFA and GGBS are by-p...

Q. Use of PFA and GGBS? Both PFA and GGBS are by-products of industry and use of them is ecologically friendly. Most significantly, with PFA and GBS adopted as partial replacem

Present worth of an infinite series of annual amount, The construction of a...

The construction of a new bakery requires the property development firm to pay the municipality the cost to expand its sewage treatment plant. In addition to the expansion costs, t

Soils, how to classify soils materials

how to classify soils materials

Surveying, define surveying and where it is involved

define surveying and where it is involved

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