Problem Description:

Linear static analysis is performed on the truss. The vertical reaction at the supports of the truss are determined. All dimensions are in inches.
Solution Type: Linear Static
Unit: inch/Kip/second
Model Geometry: Length: L = 200 in; Height: h = 90 in
Cross Sectional Properties: Area: A = 100 in2
Material Properties:
• Young’s Modulus: E = 30.0 E+3 ksi
• Poisson’s Ratio: nu = 0.3
Boundary Conditions:
All translations are restrained at points A and B (pinned support). All nodes are constrained in the Z-translation, X and Y-rotations. Several point loads are applied as shown in Figure.
P1 = 4 Kip, P2 = 2 Kip, P3 =3 Kip, P4 = 6 Kip, P5 = 5 Kip, and P6 = 10 Kip.
References:
[1]. McCormac, J. C., Structural Analysis, 3rd Edition. New York: In Text Educational Publishers, 1975.

APDL code

 fini
 /clear
 /prep7
 ! Variables
 L=200    ! inches
 H=90
 SEC_AREA=100 ! inch square
 EE=30E3    !psi
 NU=0.3
 P1=4    ! lbf
 P2=2
 P3=3
 P4=6
 P5=5
 P6=10
 ET,1,LINK180    
 MP,EX,1,EE    
 MP,PRXY,1,NU    
 !R,1,SEC_AREA
 SECTYPE,1,LINK,,1  
 SECDATA,SEC_AREA
 ! Geometry
 K,1,0,0
 K,2,0,60
 K,3,12.5,60
 K,4,50,H
 K,5,50,75
 K,6,100,H
 L,1,2
 L,1,3
 L,2,3
 L,2,4
 L,3,5
 L,4,5
 L,4,6
 L,5,6
 LDIV,1,,,4
 LDIV,2,,,4
 LDIV,4,,,2
 LDIV,5,,,2
 LDIV,7,,,3
 LDIV,8,,,3
 L,7,10
 L,8,11
 L,9,12
 L,13,14
 L,15,17
 L,16,18
 L,8,10
 L,9,11
 L,2,12
 L,3,13
 L,13,5
 L,4,17
 L,15,18
 LGEN,,ALL,,,-L/2,,,,,1
 LSYMM,X,all
 NUMMRG,KP
 SAVE
 ! Meshing
 LESIZE,ALL,,,1,
 LMESH,ALL
 SAVE
 !BOUNDARY CONDITIONS
 /SOLU
 ! Load
 FK,7,FX,P1
 FK,8,FX,P1
 FK,9,FX,P1
 FK,26,FY,-P5
 FK,15,FY,-P6
 FK,16,FY,-P6
 FK,6,FY,-P6
 FK,34,FY,-P6
 FK,28,FY,-P6
 FK,2,FX,P2 + 1.5435
 FK,2,FY,-2.5725
 FK,13,FX,3.087
 FK,13,FY,-5.145
 FK,4,FX,1.5435
 FK,4,FY,-P5-2.5725
 ! Constrains
 DK,1,ALL
 DK,19,ALL
 SOLVE
 /POST1  
 PRRSOL

RESULTS

Comparison

DescriptionTheory [1]ANSYS
Vertical Reaction at Point A (Kip)34.334.29
Horizontal Reaction at Point A (Kip)11.511.49
Vertical Reaction at Point B (Kip)36.036.0
Horizontal Reaction at Point B (Kip)-31.7-31.67