Question

didzonaws.com/ OldCkDoard yunus.pro/5990732702a96/7835411?response-cache-control-private%2C%20max-age%3D21600&re Problem 2) Determine the maximum tensile and compressive bend- ing stress for the simply supported beam with a concen- trated load P = 12 kip and cross section as shown. Р 5 ft- 10 ft C 8 in. B. -15 ft 4 in.

pls solve with explanation if you could as it will help me understand the solution. And pls write boldly I have hard time reading handwritings. thanks

Answer 1

Maximum tensile and Compressive stress occur at at a section where Where Bending moment is max. Draw BMD. P=12 kip А C tui a=5ft tuna B baloft RA= Pb = 124 10 L RA= 8 KN. 15 RB= 12-RA = 12-8 E HIN wab wab = 12x5X10 = 40 kipft 15 t sagging BMD (kip-ft Mmax occurat B = 40 kip-ft=40612 = 480 kip-in. Bending stress theory I My 3 I= bd² 4x8 = 170.66 inh 1 12 12

Yt4int N А As whole beam is under sagging moment, top fibere is subjected to compressive stress white bottom fibre ins Subjected to tensile stress M Yt comp I = 480 x 4 170.66 Comp = 11.25 Kiplin² Myb ten = = 480 x 4 170.66 Ten - 11.25 Kiplin?