Difference Between Statically Determinate And Indeterminate Structures Pdf

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difference between statically determinate and indeterminate structures pdf

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In statics and structural mechanics , a structure is statically indeterminate when the static equilibrium equations - force and moment equilibrium conditions - are insufficient for determining the internal forces and reactions on that structure.

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Difference between Determinate and Indeterminate Structure

A truss is considered statically determinate if all of its support reactions and member forces can be calculated using only the equations of static equilibrium. For a planar truss to be statically determinate, the number of members plus the number of support reactions must not exceed the number of joints times 2. This condition is the same as that used previously as a stability criterion. The truss shown in Fig. The truss in Fig. Therefore, there are 4 unknown reactions. The number of members plus reactions is 15, which is larger than 2 times the number of joint.

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Fundamental Structural Analysis

There are two types of structure to be design and analysis in civil engineering they are Statically determinate and indeterminate structures. Here, I shall tell you the difference between Statically determinate and indeterminate structures. The most common structure like public building residential building are statically indeterminate structures. In order to analyze a statically indeterminate structure, you have to know how to analyze the statically determinate structure. If the structure can be analyzed by use of the equation of equilibrium is known as statically determinate structure. The equation of equilibrium are,. Sum of horizontal force is zero, Sum of vertical force is zero, Sum of the moment about any point is zero.

Statically indeterminate

Structure is an assemblage of a number of components like slabs, beams, columns, walls, foundations and so on, which remains in equilibrium. It has to satisfy the fundamental criteria of strength, stiffness, economy, durability and compatibility, for its existence. Any structure is designed for the stress resultants of bending moment, shear force, deflection, torsional stresses, and axial stresses.

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Statically Determinate and Indeterminate Trusses


  1. Leo N. 28.12.2020 at 07:47

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  2. Jerry T. 30.12.2020 at 19:18

    Determinate structures are analysed just by the use of basic equilibrium equations. By this analysis, the unknown reactions are found for the further determination of stresses. Redundant or indeterminate structures are not capable of being analysed by mere use of basic equilibrium equations.

  3. Eustache S. 02.01.2021 at 04:49

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