Truss Structures: The Direct Stiffness Method - Fundamentals of Finite Element Analysis - page 75

k (2)
14

2)10 5 K 18 = =− (2 . 65 /

K 19 = K 1,10 = K 1,11 = K 1,12 = 0

k (1)
22

k (2)
22

2)10 5 K 22 = + = 0 + (2 . 65 /

K 23 = K 24 = 0

k (1)
23

K 25 = = 0

k (1)
24

K 26 = = 0

k (2)
23

2)10 5 K 27 = =− (2 . 65 /

k (2)
24

2)10 5 K 28 = =− (2 . 65 /

K 29 = K 2,10 = K 2,11 = K 2,12 = 0

k (3)
11

75(10 5 ) K 33 = = 3 .

k (3)
12

K 34 = = 0

K 35 = K 36 = 0

k (3)
13

75(10 5 ) K 37 = =− 3 .

k (3)
14

K 38 = = 0

K 39 = K 3,10 = K 3,11 = K 3,12 = 0

k (3)
22

K 44 = = 0

K 45 = K 46 = 0

k (3)
23

K 47 = = 0

k (3)
24

K 48 = = 0

K 49 = K 4,10 = K 4,11 = K 4,12 = 0

k (1)
33

k (4)
11

k (5)
11

75)10 5 K 55 = + + = (3 . 75 + 0 + 3 .

k (1)
34

k (4)
12

k (5)
12

K 56 = + + = 0 + 0 + 0 = 0

k (4)
13

K 57 = = 0

k (4)
14

K 58 = = 0

k (5)
13

75(10 5 ) K 59 = =− 3 .

k (5)
14

K 5,10 = = 0

K 5,11 = K 5,12 = 0

k (2)
44

k (4)
22

k (5)
22

0)10 5 K 66 = + + = (0 + 3 . 75 +

k (4)
23

K 67 = = 0

k (4)
24

75(10) 5 K 68 = =− 3 .