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PRESENTATION PRESENTATION

PRESENTATION ON TEMPERATURE & SHRINKAGE EFFECT ON

STRUCTURAL ANALYSIS

Introduction:The deformation of structure can be

occurred by stresses caused by external loads. But deformation & volume changes can also occur without any external loading. The most important of these are shrinkage & temperature effect.

Structure mainly two types:1.R.C.C Structure: 2. Steel Structure:

Reasons for shrinkage:1.By evaporation of water.2.Drying of concrete.3.Increasing of temperature

Temperature & Shrinkage effect:1.It may cause deleterious crack as in

slabs,walls etc.2.In structure that are statically

indeterminate & most concrete structure, it may cause large & harmful stresses.

3.It may cause deformation of total structure.

4.It may affect to the fixed joint.

Cracks due to temperature & shrinkage effect:

Crack in wall:

Shrinkage in an unrestrained reinforced concrete member :

Shrinkage in a restrained reinforced concrete member :

Due to accident massive change in temperature of the structure causes the fall of twin tower:

Matter of concern during design:1. Careful during selection of material2.By analysing previous weather report.3.By analysing previous max temperature record.4. By predicting the future condition.5.The coefficient of thermal expansion &

contraction should be within the allowable range. 6.By increasing aggregate content.7.By adjusting water content.8.Careful curing is needed.

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