# How do you solve indeterminate frames?

## How do you solve indeterminate frames?

To solve a statically indeterminate beam (or frame) using the force method we will make use of redundant forces. A redundant force is one, which cannot be solved using static equilibrium equations alone. The forces will be taken out and reapplied so that the considered structure is always statically determinate.

What are the two methods for determination of forces name them?

We have two methods of analysing structures, one is the force method (Flexibility method) and the rest one is the displacement method (displacement method). In the force method the unknowns are forces, moments and in case of displacement method, unknowns are deflection, rotation.

Can you solve a statically indeterminate truss?

Therefore, there are 4 unknown reactions. The number of members plus reactions is 15, which is larger than 2 times the number of joint. Therefore, this is a statically indeterminate truss. We can solve for the reaction forces, but not the force in all the members.

### How many assumptions do we have to make to solve an indeterminate truss?

three assumptions
Since the given truss is indeterminate to degree, it is required to make three assumptions to reduce this frame into a statically determinate truss. For the above type of trusses, two types of analysis are possible.

What is difference between force method and displacement method?

In the force method of analysis,primary unknown are forces.In this method compatibility equations are written for displacement and rotations (which are calculated by force displacement equations). In the displacement method of analysis,the primary unknowns are the displacements.

What is the method of consistent deformations force?

Consistent Deformations – Force Method. The method of consistent deformations, or sometimes referred to as the force or flexibility method, is one of the several techniques available to analyze indeterminate structures.

## How is the force method used in structural analysis?

Method of Consistent Deformation- The force method (also called the flexibility method or method of consistent deformation) is used to calculate reactions and internal forces in statically indeterminate structures due to loads and imposed deformations. The system thus formed is called the basic determinate structure.

How to calculate the deformations of support a?

Calculate the deformations corresponding to the redundants, i.e., the rotation at Support A, A0, and the translation, B0, at Support B. This can be accomplished as follows; using the virtual work method,

Which is the force method for an indeterminate structure?

Force Method of Analysis for (Indeterminate) Trusses ForceMethod Page 8 ForceMethod Page 9 Force Method of Analysis for (Inderminate) Composite Structures ForceMethod Page 10 Part 1 Part 2 ForceMethod Page 11