Composite structure is defined as...

• Composite structure is defined as structures with more than one member.

• Composite structure is defined as structures with axial and bending members.

• Composite structure is defined as structures with different materials.

• Composite structures is defined as structures with different deflections.

The beam is fixed at A and pinned at B. A load 10kN is applied at midspan at C.

The beam has _____ nos. of unknown forces?

Answer explanation

The unknow forces are support reactions Ay, Ax, MA, Bs and By, and there are a total of FIVE (5).

Write the general expression/equation (formulae) to determine displacement deriving from Energy conservative principle for a composite structure.

Answer explanation

If the axial rigidity of beam/frame is ignored, the second term in right expression on axial deformation can be eliminated.

Define redundant in flexibility method

• The restraints added to the given indeterminate structure are called redundant

• The restraints removed from the given indeterminate structure are called redundant

• The loading added to the given indeterminate structure are called redundant

• The loadings removed from the given indeterminate structure are called redundant

Answer explanation

Redundant are excessive forces in an indeterminate structure, and called be termed as degree of indeterminacy. An indeterminate structure with redundant is unable to be solved directly using the static equilibrium equation. Visit the video on how to determine the redundant/ degree of indeterminacy of indeterminate structures: https://youtu.be/IYwQJ0qIEwQ

For the given composite structure, sketch the node and element numbering indicating the all possible degree of freedoms.

Answer explanation

Degree of Freedom:

Node 1- 1x & 1y;

Node 2- 2x & 2y;

Node 3- 3y;

Node 4-4x & 4y