Using the moment distribution method, determine the end moments at the supports of the frame shown in Figure 12.9. EI = constant.

 Using the moment distribution method, determine the end moments at the supports of the frame shown in Figure 12.9. EI = constant.

Fig. 12.9. Frame.

Solution

Fixed end moment.

Stiffness factor.

Distribution factor.

Table 12.4. Distribution table.

Final member end moments.

MAB = –2.77 k. ft

MBA = –5.55 k. ft

MBC = –5.55 k. ft

MBD = +11.25 k. ft

MCB = –2.77

MDB = +80 k. ft

MDE = –80 k. ft