CHAPTER V 

 BEAMS OF CONSTANT CROSS-SECTION 



The Influence Diagrams for beams are but little different 

 from those which have been explained. In all cases the 

 final diagram can be constructed upon the base diagram. 



Restrained Beams. Referring to Fig. 39, the moment 

 at any section X is given by equation (d) or 



FIG. 39. 

 If the vertical shear at the section X is represented by s , 



s>a MB M s>0 



g _ y STT^ = ~ +7?i STf^ (92) 



But Ri SlF=>S=the vertical shear for a simple beam 

 resting upon two supports; therefore 



Mjt^Mj. 

 I 



60 



