A simply supported beam has a span of 12 m. The beam carries a total uniformly distributed load of 21.5 kN/m.
1. To prevent excessive deflection, a support is added at midspan. Calculate the resulting moment (kN·m) at the added support.
2. Calculate the resulting maximum positive moment (kN·m) when a support is added at midspan.
3. Calculate the reaction (kN) at the added support.