In columns and beams, plastic hinges are automatically placed in the middle of the plastic deformation zone of the columns or beams.
L p = Plastic joint length
According to 184.108.40.206 of TBDY , plastic hinges can be placed at the ends of the clear span of columns or beams. However, according to Article 220.127.116.11 of TBDY , the plastic joint should be placed in the middle of the plastic deformation zone. The approach specified in TBDY 18.104.22.168 is an idealized approach.
Plastic hinges are placed in the middle of the plastic deformation zone as described in Article 22.214.171.124 of TBDY , as shown by the red dot in the picture below. Since the plastic deformation zone is spread along the length of the plastic hinge, L p , the plastic hinge is defined at a distance L p / 2 from the ends of the defined elements in the clean opening .