Umbrellas are typically inexpensive items, so when they fail --- such as incurring a broken rib or losing a joint rivet --- the owner generally throws it away. But like many household items, umbrellas can typically be repaired. While some failures are not worth the time or effort to fix, others can readily be repaired. Fixing broken ribs takes a few minutes to repair after you have gathered the necessary supplies.
Cut the broken umbrella rib section out with a pair of wire cutters. Then cut the same length from a wire coat hanger.
Put metal or aluminium crimp tubes at each end of the missing section of the umbrella rib. Then insert the piece of wire coat hanger into each side. Hold the crimps firmly.
Crimp the metal or aluminium crimp tubes down tightly using a pair of pliers. The crimp tube should not be able to spin or move up and down the rib.
If the failure occurs at the joint where the umbrella ribs fold, the rivet has loosened and fallen out. Simply thread enamelled wire through the hole and loop it several times to stay in place. Twist the ends together and cut off any excess with scissors.