STRUCTURAL ANALYSIS

Question 1

It is a structure composed of
slender members joined together at
their end points.

Answer 1

Truss

Question 2

The members commonly used in
construction consist of _______ and _______ .

Answer 2

wooden struts, metal bars

Question 3

Forces that pull outward at its ends.

Answer 3

Tension

Question 4

Forces that push or compress together and are heavier.

Answer 4

Compression

Question 5

Give the 2 assumptions for designs.

Answer 5

1. All loadings are applied at the joints
2. The members are joined together by
   smooth pins

Question 6

Give the 3 methods of structural analysis.

Answer 6

1. Method of Joints
2. Method of Sections
3. Method of Frames

Question 7

This method is based on the fact that if the entire truss is in equilibrium, then each joint is also in equilibrium.

Answer 7

Method of Joints

Question 8

Since the members of a ________ are straight two-force members lying in a single plane, each joint is subjected to a force system that is coplanar and concurrent.

Answer 8

plane truss

Question 9

When all forces are acting in the same plane, they are called _________.

Answer 9

Coplanar

Question 10

When forces act at the same time and at the same point, they are called

Answer 10

Concurrent

Question 11

How many equations does method of joints need because its procedure involve concurrent forces at each joint?

Answer 11

2; horizontal and vertical force sum.

Question 12

Method of sections involve _________ forces.

Answer 12

non-concurrent

Question 13

This method has the basic advantage that the force in any desired member may eb found directly in analysis of a section which has cut that member.

Answer 13

Section

Question 14

How many forces should eb cut in method of section?

Answer 14

<= 3 forces

Question 15

How many available independent equilibrium relations?

Answer 15

3

Question 16

What connector is used in method of frames

Answer 16

Pin connector (with two reatcions)

Question 17

Give the steps to solve method of joints.

Answer 17

1. Analyze the units.
2. Get the reactions.
3. Find a node/member with <=2 unknowns, and write its FBD.
4. then solve using 2 equations.

*when the structure is symmetrical, same naalng yung forces sa left side and right.

Question 18

Give the steps to solve method of sections.

Answer 18

1. Analyze the units.
2. Get the reactions.
3. Cut through the needed forces.
4. Write the FBD of needed forces.
5. solve using 3 equations, usally inuuna yung summation of moment.

Question 19

Give the steps to solve method of frames.

Answer 19

1. Analyze the units.
2. Get the reactions, kapag wala ng way para mahanap yung foce value, hatiin na yung members in each pin connector.
3. Solve using 3 equations.