ENGI6705-StructuralAnalysis-ClassNotes5

ENGI6705-StructuralAnalysis-ClassNotes5 - 5 ANALYSIS OF...

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5. ANALYSIS OF INDETERMINATE STRUCTURES BY FORCE METHOD
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5.1 ANALYSIS OF INDETERMINATE STRUCTURES BY FORCE METHOD - AN OVERVIEW 5.1 ANALYSIS OF INDETERMINATE STRUCTURES BY FORCE METHOD - AN OVERVIEW 5.2 INTRODUCTION 5.3 METHOD OF CONSISTENT DEFORMATION 5.4 INDETERMINATE BEAMS 5.5 INDETRMINATE BEAMS WITH MULTIPLE DEGREES OF INDETERMINACY 5.6 TRUSS STRUCTURES 5.7 TEMPERATURE CHANGES AND FABRICATION ERRORS
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5.2 INTRODUCTION 5.2 Introduction While analyzing indeterminate structures, it is necessary to satisfy (force) equilibrium , (displacement) compatibility and force-displacement relationships (a) Force equilibrium is satisfied when the reactive forces hold the structure in stable equilibrium, as the structure is subjected to external loads (b) Displacement compatibility is satisfied when the various segments of the structure fit together without intentional breaks, or overlaps (c) Force-displacement requirements depend on the manner the material of the structure responds to the applied loads , which can be linear/nonlinear/viscous and elastic/inelastic; for our study the behavior is assumed to be linear and elastic
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5.2 INTRODUCTION (Cont’d) Two methods are available to analyze indeterminate structures, depending on whether we satisfy force equilibrium or displacement compatibility conditions - They are: Force method and Displacement Method Force Method satisfies displacement compatibility and force-displacement relationships; it treats the forces as unknowns - Two methods which we will be studying are Method of Consistent Deformation and (Iterative Method of) Moment Distribution Displacement Method satisfies force equilibrium and force-displacement relationships; it treats the displacements as unknowns - Two available methods are Slope Deflection Method and Stiffness (Matrix) method
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5.3 METHOD OF CONSISTENT DEFORMATION
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