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# Example for Trusses, Beams, Frames and Arches (Part - 2) Civil Engineering (CE) Notes | EduRev

## Civil Engineering (CE) : Example for Trusses, Beams, Frames and Arches (Part - 2) Civil Engineering (CE) Notes | EduRev

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s e m a r F f o e l p m a x E

Example 2.5 Obtain internal force diagrams for the frame in Figure E2.5.

Figure E2.5
Solution:
FBD of the whole system:

Take a section at a distance from A along AB :
Page 2

s e m a r F f o e l p m a x E

Example 2.5 Obtain internal force diagrams for the frame in Figure E2.5.

Figure E2.5
Solution:
FBD of the whole system:

Take a section at a distance from A along AB :

These expressions for internal force are valid from point A to B , using which we can obtain the internal force
diagrams for AB . Using these we can find the internal forces at point B ( ) from which we also get the
forces applied on member BD .
At

Internal forces on BD can be obtained from its free body diagram. Let us take a section at a distance  from B
along BD .
For

Page 3

s e m a r F f o e l p m a x E

Example 2.5 Obtain internal force diagrams for the frame in Figure E2.5.

Figure E2.5
Solution:
FBD of the whole system:

Take a section at a distance from A along AB :

These expressions for internal force are valid from point A to B , using which we can obtain the internal force
diagrams for AB . Using these we can find the internal forces at point B ( ) from which we also get the
forces applied on member BD .
At

Internal forces on BD can be obtained from its free body diagram. Let us take a section at a distance  from B
along BD .
For

For

Page 4

s e m a r F f o e l p m a x E

Example 2.5 Obtain internal force diagrams for the frame in Figure E2.5.

Figure E2.5
Solution:
FBD of the whole system:

Take a section at a distance from A along AB :

These expressions for internal force are valid from point A to B , using which we can obtain the internal force
diagrams for AB . Using these we can find the internal forces at point B ( ) from which we also get the
forces applied on member BD .
At

Internal forces on BD can be obtained from its free body diagram. Let us take a section at a distance  from B
along BD .
For

For

Example 2.6 Obtain internal force diagrams for the frame in Figure E2.6.

Page 5

s e m a r F f o e l p m a x E

Example 2.5 Obtain internal force diagrams for the frame in Figure E2.5.

Figure E2.5
Solution:
FBD of the whole system:

Take a section at a distance from A along AB :

These expressions for internal force are valid from point A to B , using which we can obtain the internal force
diagrams for AB . Using these we can find the internal forces at point B ( ) from which we also get the
forces applied on member BD .
At

Internal forces on BD can be obtained from its free body diagram. Let us take a section at a distance  from B
along BD .
For

For

Example 2.6 Obtain internal force diagrams for the frame in Figure E2.6.

Solution:
FBD of the whole system:

From 6 static equilibrium equations:

For member AB :

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