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验证例题11.pdf
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验证 例题 11
1Example 11 Title 2-D plane truss Description Determine the vertical displacements of a plane truss structure subjected to concentrated loads.Structural geometry and analysis model 2Model Analysis Type 2-D static analysis(X-Z plane)Unit System in,kip Dimension Length 720 in Height 180 in Element Truss Element Material Modulus of elasticity E =30 103 ksi Section Property Area A =1.0 in2 (Elements )=2.0 in2 (Elements and)=1.5 in2 (Elements and)=3.0 in2 (Elements )=4.0 in2 (Elements and)Boundary Condition Node 1 ;Constrain Dx and Dz.(Hinge support)Node 3 ;Constrain Dz (Roller support)Load Case A concentrated load,20 kips each is applied to the nodes 2,4 and 5 in the-Z direction.Example 11 3Results Displacements of the structure Comparison of Results Unit:in Node 5 Theoretical STAAD-III MIDAS/GenMaximum vertical deflection(Z)-2.63-2.63-2.63 References Jack C.Mccomack,“Structural Analysis”,p.271,Example 18-2.“STAAD-III/ISDS,Getting Started and Example Manual”,Research Engineers,Inc.,1994,Verification Problem No.7.

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