Beam3 Portal

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    Continuous Beam Analysis

    Analysis of a continuous beams or a continuous frame subject to distribut

    Length 20.00 30.00 20.00

    Theta 90.00 0.00 -90.00

    Area 1.00 2.00 2.00

    I 8.333E-02 1.667E-01 1.667E-01

    E 20000000 20000000 20000000

    Applied Loads

    For distributed loads specify position of the start or the load, the load intensity at the start

    For Point loads and moments specify the position and magnitude

    Positions and load lengths are measured along the beam axis

    Distributed and point load direction is either "X" (horizontal) or "Y" (vertical)

    Beam No

    Start Load/m start Load/m end Load Length

    1 1 0 -20 -20 20

    2 2 0 -30 -30 30

    3 3 0 -30 -30 20

    4 3

    5 3

    6

    7

    8

    9

    10

    11

    12

    Enter 1 under End Fixity for restrained freedoms. End Actions and End Freedom numbe

    Support No FX FY M FX

    1 1 1 1 0

    2 1

    3 4

    4 1 1 1 0

    1 2 3

    k_1 EA/L 1000000 1333333.333 2000000

    k_2 12EI/L^3 2500 1481.481481 5000

    End Fixity

    Distributed Loads

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    k_3 EI/L 83333.3333 111111.1111 166666.6667

    k_4 6EI/L^2 25000 22222.22222 50000

    c Cos() =(X2-X1)/L 0.0000 1.0000 0.0000

    s Sin() =(Y2-Y1)/L 1.0000 0 -1

    Stiffness matrix coefficients; Beam No

    1 2 3 4 5

    c2.k_1 + s

    2.k_2 s.c.(k_1 - k_2) -s.k_4 -(c

    2.k_1 + s

    2.k_2) s.c.(-k_1 + k_2)

    2 s2.k_1 + c

    2.k_2 c.k_4 s.c.(-k_1 + k_2) -(s

    2.k_1 + c

    2.k_2)

    3 4k_3 s.k_4 -c.k_4

    4 Symmetrical c2.k_1 + s

    2.k_2 s.c.(k_1 - k_2)

    5 s2.k_1 + c

    2.k_2

    6

    Beam Stiffness matrix; Beam No: 3

    1 2 3 4 5

    1 5.00E+03 -1.22E-10 5.00E+04 -5.00E+03 1.22E-10

    2 -1.22E-10 2.00E+06 3.06E-12 1.22E-10 -2.00E+06

    3 5.00E+04 3.06E-12 6.67E+05 -5.00E+04 -3.06E-12

    4 -5.00E+03 1.22E-10 -5.00E+04 5.00E+03 -1.22E-10

    5 1.22E-10 -2.00E+06 -3.06E-12 -1.22E-10 2.00E+06

    6 5.00E+04 3.06E-12 3.33E+05 -5.00E+04 -3.06E-12

    Deflection

    Applied

    Force Nett Force Reaction

    FX1 0.0000000 -200.0 360.5 560.5

    FY1 0.0000000 0.0 563.5 563.5

    M1 0.0000000 666.7 -3484.0 -4150.6

    FX2 -0.1296693 -200.0 -200.0 0.0

    FY2 -0.0005635 -450.0 -450.0 0.0

    M2 -0.0014534 -2916.7 -2916.7 0.0

    FX3 -0.1297897 -480.0 -480.0 0.0

    FY3 -0.0001682 -450.0 -450.0 0.0

    M3 0.0065891 500.0 500.0 0.0

    FX4 0.0000000 -480.0 319.5 799.5

    FY4 0.0000000 0.0 336.5 336.5

    M4 0.0000000 1750.0 -4293.1 -6043.1

    FX5

    FY5

    M5

    FX6

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    FY6

    M6

    FX7

    FY7

    M7

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    d loads, point loads and moments

    Numbeams

    m 3

    degrees Angle of beam to X axis

    m2 Cross Sectional Area

    m4 2nd Moment of Area

    kPa Young's Modulus

    and end, and the load length

    Direction X/Y Position Load Direction X/Y Position Moment FX1

    X -200.00

    Y 0.00

    X 5 -120 X -480.00

    10 -120 X 0.00

    15 -120 X 0.00

    0.00

    s are calculated by the spreadsheet

    FY M

    0 0

    2 3

    5 6

    0 0

    4 5 6 Current Beam

    2000000

    5000

    Moments

    End Freedoms

    Point

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    166666.6667

    50000

    6.12574E-17

    -1

    6

    -s.k_4

    c.k_4

    2k_3

    s.k_4

    -c.k_4

    4k_3

    6

    5.00E+04

    3.06E-12

    3.33E+05

    -5.00E+04

    -3.06E-12

    6.67E+05

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    FY1 M1 FX2 FY2 M2

    0.00 666.67 -200.00 0.00 -666.67

    -450.00 -2250.00 0.00 -450.00 2250.00

    0.00 -1750.00 -480.00 0.00 1750.00

    0.00 0.00 0.00 0.00 0.00

    0.00 0.00 0.00 0.00 0.00

    0.00 0.00 0.00 0.00 0.00

    End Actions

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    Element Actions

    1 -96.74 -15.45 -240.00 96.74

    2 0.00 20.00 33.33 0.00

    3 96.74 175.45 72.71 -96.74

    4 7.12 207.99 -9.50 -7.12

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    5 31.77 26.10 9.84 -31.77

    6 -8.51 125.67 14.19 8.51

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    15.45 54.58

    -20.00 6.67

    -175.45 145.42

    -207.99 -18.99

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    -26.10 19.68

    -125.67 28.38

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    Strand7 res

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    0.00% 0.00% 0.00% 0.00% 0.00% 0.00%

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    Beam 1

    Complete stiffness matrix Beam 2

    1 2 3 4 5 6

    1 2500 6.11043E-11 -25000 -2500 -6.11043E-11 -25000

    2 6.11043E-11 1000000 1.53144E-12 -6.11043E-11 -1000000 1.53144E-12

    3 -25000 1.53144E-12 333333.3333 25000 -1.53144E-12 166666.6667

    4 -2500 -6.11043E-11 25000 1335833.333 6.11043E-11 250005 -6.11043E-11 -1000000 -1.53144E-12 6.11043E-11 1001481.481 22222.22222

    6 -25000 1.53144E-12 166666.6667 25000 22222.22222 777777.7778

    7 0 0 0 -1333333.333 0 0

    8 0 0 0 0 -1481.481481 -22222.22222

    9 0 0 0 0 22222.22222 222222.2222

    10 0 0 0 0 0 0

    11 0 0 0 0 0 0

    12 0 0 0 0 0 0

    13

    14

    15

    16

    17

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    20

    21

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    7 8 9 10 11 12 13

    0 0 0 0 0 0

    0 0 0 0 0 0

    0 0 0 0 0 0

    -1333333.333 0 0 0 0 00 -1481.481481 22222.22222 0 0 0

    0 -22222.22222 222222.2222 0 0 0

    1338333.333 -1.22209E-10 50000 -5000 1.22209E-10 50000

    -1.22209E-10 2001481.481 -22222.22222 1.22209E-10 -2000000 3.06E-12

    50000 -22222.22222 1111111.111 -50000 -3.06287E-12 333333.3

    -5000 1.22209E-10 -50000 5000 -1.22209E-10 -50000

    1.22209E-10 -2000000 -3.06287E-12 -1.22209E-10 2000000 -3.1E-12

    50000 3.06287E-12 333333.3333 -50000 -3.06287E-12 666666.7

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    Stiffness matrix for active freedoms

    1 2 3 4 5 6 7 8 9

    1 1.34E+06 6.11E-11 2.50E+04 -1.33E+06 0.00E+00 0.00E+00

    2 6.11E-11 1.00E+06 2.22E+04 0.00E+00 -1.48E+03 2.22E+04

    3 2.50E+04 2.22E+04 7.78E+05 0.00E+00 -2.22E+04 2.22E+05

    4 -1.33E+06 0.00E+00 0.00E+00 1.34E+06 -1.22E-10 5.00E+04

    5 0.00E+00 -1.48E+03 -2.22E+04 -1.22E-10 2.00E+06 -2.22E+046 0.00E+00 2.22E+04 2.22E+05 5.00E+04 -2.22E+04 1.11E+06

    7

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    Inverted stiffness matrix

    1 2 3 4 5 6 7 8 9

    1 2.03E-04 2.76E-07 -4.16E-06 0.000202 -1.38E-07 -8.3E-06

    2 2.76E-07 1.00E-06 -2.99E-08 2.76E-07 0 -2.6E-08

    3 -4.16E-06 -2.99E-08 1.45E-06 -4.1E-06 1.49E-08 -1E-07

    4 0.000202 2.76E-07 -4.1E-06 0.000203 -1.38E-07 -8.3E-06

    5 -1.4E-07 1.15E-10 1.49E-08 -1.4E-07 5E-07 1.32E-086 -8.3E-06 -2.6E-08 -1E-07 -8.3E-06 1.32E-08 1.29E-06

    7

    8

    9

    10

    11

    12

    13

    14

    15

    16

    17

    18

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    Force Deflection

    -200 -0.12967

    -450 -0.00056

    -2916.67 -0.00145

    -480 -0.12979

    -450 -0.00017

    500 0.006589