Question

Differentiate between three hinged and two hinged arches.

Answer 1

Three hinged arches:

there are three hinges in the arch, A, B and C. Generally there are three numbers of equilibrium equation, but the fourth equation is derived from the fact the algebraic sum of all the moments at the hing C is 0. So there are four numbers of equilibrium equations, and we can determine all the four support reactions, Va, Vb, Ha, and Hb.


Two hinged arches:

there are two hinges A and B, and there are four support reactions. There are only three numbers of equations of equilibrium, so two hinged arches are indeterminate to the degree equal to 1.

Answer 2

hey mate. here is the answer you are looking for.
Two hinged arches is the statically indeterminate structure to degree one.
Three hinged arches can be defined as a humped or curved beam subjected to transverses.
hope it helps you.
plz mark as brainiest and don't forget to check out following me