Which is better determinate or indeterminate structure?

Determinate structures are analysed just by the use of basic equilibrium equations. By this analysis, the unknown reactions are found for the further determination of stresses. Redundant or indeterminate structures are not capable of being analysed by mere use of basic equilibrium equations.

Is determinate more stable than indeterminate?

“Case 2. Original Structure minus 1 force” is therefore the stable and determinate version of this structure. Therefore the original structure is indeterminate with one redundant. Indeterminate structures are often more structurally efficient.

What are the advantages of statically determinate structures?

Statically determinate structures have the benefit of not developing stresses due to for example temperature changes (as you mentioned). They also do not develop unwanted forces in the presence of differential settlements.

What are the advantages of using indeterminate beams?

analysis is more complicated.

stresses and deflections are smaller.

redundant supports → improved stability & lower chance of collapse due to overload (wind, earthquake, etc) or poor design.

Why indeterminate structures are economical than determinate structure?

Indeterminate structures are economical than determinate structure. Explanation: The following structure has minimum three reaction required for statically stability, it has no concurrent reactions and thus it is geometrically stable. But the given has three internal hinges and thus it is internally unstable.

What is the difference between determinate structure and indeterminate structure?

Determinate structures are analyzed just by the use of basic equilibrium equations. By this analysis, the unknown reactions are found for the further determination of stresses. Redundant or indeterminate structures are not capable of being analyzed by mere use of basic equilibrium equations.

Can a structure be unstable and determinate?

Criteria 1a: A structure is unstable if a joint in the structure can be displaced without causing any member deformation in the structure. Removal of one support or of one connection fixity will make a stable and determinate structure unstable.

How do you know if a structure is determinate?

If the number of equations = the number of unknowns, then the structure is statically determinate. If, on the other hand, number of equations < the number of unknowns, the structure is statically indeterminate, and hence, other methods need to be used to analyze it.

Why are indeterminate structures used?

A structure is usually externally indeterminate or redundant if the reactions at the supports can not be determined by using three equations of equilibrium, i.e. In the case of beams subjected to vertical loads only, two reactions can be determined by conditions of equilibrium.

How do you determine an indeterminate structure?

This is determine by the following rule: If M + R = (2 * J), the truss is internally statically determinate. However, if M +R > 2 * J, the truss is internally statically indeterminate. This is where: M is the total number of members in the truss.

What is determinate structure?

[də′tər·mə·nət ′strək·chər] (mechanics) A structure in which the equations of statics alone are sufficient to determine the stresses and reactions.

What are determinate and indeterminate problems?

A statically determinate structure is one that is stable and all unknown reactive forces can be determined from the equations of equilibrium alone. A statically indeterminate structure is one that is stable but contains more unknown forces than available equations of equilibrium.