Structure Analysis I

Structure Analysis I

Lecture 15Influence Line for

Statically Determinate Structure

Part 2Ch.6 in text book

Group Work 2Draw the IL for the Shear & Moment at B

Group Work 4Draw the IL for the Shear & Moment at C

0.5

Example 1Internal Hinge ExampleDetermine the shear & moment at point D

D

5 5 5 10D

Example 2Truss ExampleDetermine The force in member GB

EGB

EGB

RF

RF

41.1

45cos

AGB

AGB

RF

RF

41.1

45cos

part second for the

Example 3Truss ExampleDetermine The force in member GF, BF

0 40 17.3

2.3

cos30 1.15

B D GF

GF D

BF D BF D

M R F

F R

F R F R

0 20 17.3

1.15

cos30 1.15

F A GF

GF A

BF A BF A

M R F

F R

F R F R

Example 4Determine the moment at C in the two cases

cMLI .

mkNM c . 5.32)5.2(10)25.1(6

Case 1

cMLI .

mkNM c . 5.27)25.1(10)5.2(6

Case 2