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31 Cards in this Set
- Front
- Back
Basically most structures may be classified as beams, rigid frames or trusses or combination of these elements. |
layout and classification of structure |
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deals with the principles and methods by which the direct stress, the shear and the bending moment and the deflection at any section of each constituent member in the structures may be calculated |
theory of structure |
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is a combination of units constructed and so interconnected in an organized way, as to provide rigidly between its elements. |
structure |
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is a structural member whose prime function is to carry transverse loads such a joist, girder, rafter or purlin. It is completely analyzed when the shear and bending moment values have been found |
beam |
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is composed of members connected by rigid points ( welded joints for instance) to be completely analysed when the variations in direct stress, shear, and bending moment along the lengths of all members have been found |
rigid frame |
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is a structure in which all members are usually assumed to be connected by frictionless hingers |
truss |
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the loads on structures consist of dead load, live load and the dynamic or impact effects of the live load |
loads on structure |
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includes the weight if the structure itself. weight of the flooring, beams, girders and columns |
dead load |
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is the loading to be carried by the structure. weight of the movable partitions and furniture, etc. snow load and wind load |
live load |
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is the dynamic effect of the application of the live load, moving or rolling load |
impact load |
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it was stated that the theory of structures deals with the principles and methods by which the direct stress, shear and bending moment at any section of the member may be found under given conditions of loading |
methods of analysis |
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is a deformation in a member or flexural member in which parallel planes slide relative to each other so as to remain parallel |
shear |
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is the property by which a force tends to cause a body to which it is applied to rotate about a point or line, it is equal in magnitude to the product of the force |
bending moment |
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any one member, part or section, this set free from the whole structure is called a |
FREE BODY |
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a clearly drawn and complete with the magnitudes and directions of all the forces acting on it |
free body diagram |
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types of supports |
rollers hinge link fixed end |
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offers resistance in a direction normal to the surface beneath the roller, either toward or away from the supporting surface. It does not resist movement parallel to the supporting surface or to rotation about the roller |
roller type support |
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prevents movement along a horizontal and vertical direction, but does not resist rotation about the hinge. |
hinge type support |
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offers resistance in the direction along the link and through the two pins. |
link type support |
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resist rotation about support and to movement along the horizontal and vertical directions. |
fixed end support |
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is expressed in newtons |
P |
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in sq. m |
area |
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is the pascal |
stress |
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is an exceeding small quantity, |
Pascal |
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bending moment |
M |
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modulus of elasticity |
E |
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moment of inertia of the cross section about the neutral axis |
I |
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flexural rigidity |
EI |
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is defined as follows for n>0 |
singularity function |
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singularity function was introduced in 1852 by the German mathematician |
A. Clebsch |
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british engineer |
W.H. Macaulay |