How do you determine redundant forces in a statically indeterminate structure?
Redundant forces are chosen so that the structure is stable and statically determinate when you remove these forces. So, if you have two degrees of indeterminancy, you will have to remove two forces, remove three for three degrees, and so forth. Redundant forces are usually found when you have reaction forces AND a displacement, as it is obvious one caused the other. So when you remove these forces, the displacements are still there, and the structure has not changed, except that it is now statically determinant, and you can use method of superposition to figure out all your unknowns :)
mobility or DoF of a statically indeterminate structure is always less than zero and also we can have negative value of mobility. for checking this we have to see the Gruebler's criterion , wher D.F= 3(Movable link - 1) - 2*(number of Single D.F of kinematic pair) - ( number of two DF of kinetic pair) therefore, according to definition of satatically indeterminate structure have zero movable link . hence D.F will be either zero…
A redundant structure has more structure than is absolutely necessary. This means that, if some part of the structure is damaged or removed, the structure will not necessarily fail or collapse, as another part can bear the load of the damaged or missing piece. A non redundant structure is dependent on every piece of the structure.
A static data structure is any structure where the size of the structure is known at compile time and can therefore be statically allocated within the program's own data segment (the stack). A dynamic data structure is one where the initial size is unknown at compile time, or where the size of the structure may vary at runtime, and must be dynamically allocated upon the heap (the free store).