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

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

Scaffolding, definition for double type scaffolding

definition for double type scaffolding

Quality control of concrete roads, Quality Control of Concrete Roads: ...

Quality Control of Concrete Roads: Concrete roads require a very high degree of quality control. The following aspects need to be checked regularly: (a) Strength, shape an

Define types of inspection of bridge, Define Types of Inspection of Bridge?...

Define Types of Inspection of Bridge? Underwater inspections are generally categorised into five types: - Inventory - Routine - Damage - In-depth - Interim

Joints in box culverts and channels, Joints in box culverts and channels - ...

Joints in box culverts and channels - necessity of water tightness The joints for box culverts and channels must be capable of accommodating movements arising from moisture an

Embankment construction, Embankment Construction: Selection of Soil...

Embankment Construction: Selection of Soil Soil is the material used for embankment construction, though other materials like rock and fly-ash are also used in specia

Determining the amount of pre-camber, 1. Domes - You are a construction man...

1. Domes - You are a construction manager in the UAE in charge of a project that involves constructing domes.  Discuss briefly, giving examples, a range of different types of dome

Check rail on curve, Check Rail on Curve - Check Rails are basically p...

Check Rail on Curve - Check Rails are basically provided on sharp curves to reduce the lateral wear on the outer rail. They also prevent the outer wheel flange from mounting 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