THE ANALYSIS AND DESIGN OF STRUCTURES NOTES

http://www.eduresourcecollection.com/civil_structural.php

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THE ANALYSIS AND DESIGN OF STRUCTURES.

Design Procedure

1. Preliminary Analysis and Design
2. Analysis and Design of Slabs
3. Analysis and Design of Main Beams
4. Analysis and Design of Columns
5. Analysis and Design of Footings
6. Analysis of Frames
7. Analysis of Wind Loads

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THANKING YOU FOR THE READING.//////////////////////////SHAMSUL HUSAIN

STRENGTH OF MATERIALS NOTES

http://www.eduresourcecollection.com/civil_sm.php

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EXCERPTS:

Relationship between modulus of elasticity and modulus of rigidity

Consider a square element ABCD of side ‘a’ subjected to simple shear of intensity q as shown in figure.
It is deformed to the shape AB’C’D under the shear stress. Drop perpendicular BE to the diagonal DB’. Let ? be the shear strain induced and let N be the modulus of rigidity.
The diagonal DB gets elongated to DB’. Hence there is tensile strain et in the diagonal.
et = (DB’ – DB) / DB = EB’ / DB
since this deformation is very small we can take L BB’E = 45º
EB’ = BB’ / v2 = AB tan ? / v2 = a tan ? / v2
DB = v2 a
et = (a tan ? / v2)/ v2 a = tan ? /2 = = ? / 2 since ? is small
ie et = ½ X q/N —————— (1)
We know that stress along the diagonal DB is a pure tensile stress pt = q and that along the diagonal AC is a pure compressive stress pc also equal to q. hence the strain along the diagonal DB is et = q/E + 1/m X q/E
Ie et = q/E (1+1/m) —————— (2)
From (1) and (2) we have,
E = 2N(1+1/m)
This is the required relationship between E and N……………………………………..

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SOIL MECHANICS AND FOUNDATION ENGINEERING

SOIL MECHANICS NOTES (FLORIDA UNIVERSITY)

http://www.eng.fsu.edu/~tawfiq/soilmech/lecture.html

SOIL MECHANICS

LECTURE NOTES

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LECTURE # 1

SOIL AND SOIL ENGINEERING

* The term Soil has various meanings, depending upon the general field in which it is being considered.

*To a Pedologist … Soil is the substance existing on the earth’s surface, which grows and develops plant life.

*To a Geologist ….. Soil is the material in the relative thin surface zone within which roots occur, and all the rest of the crust is grouped under the term ROCK irrespective of its hardness.

*To an Engineer …. Soil is the un-aggregated or un-cemented deposits of mineral and/or organic particles or fragments covering large portion of the earth’s crust.

** Soil Mechanics is one of the youngest disciplines of Civil Engineering involving the study of soil, its behavior and application as an engineering material.

*According to Terzaghi (1948): “Soil Mechanics is the application of laws of mechanics and hydraulics to engineering problems dealing with sediments and other unconsolidated accumulations of solid particles produced by the mechanical and chemical disintegration of rocks regardless of whether or not they contain an admixture of organic constituent.”

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SHAMSUL HUSAIN