S СІ C2 СЗ C4 CS C6 C7 C8 (typ.) Given: L = 25' (typ.) and S = 10' (typ.). So, the overall floor plan = 75' x 60' The beam width (bw) and depth (h) of B1 (typ.) are taken to be 10-in and 20-in, respectively. L S1 (typ.) 1 B1 (typ.) B1 (typ.) C10 C9 C11 C12 A typical girder, e.g., G1, has a width (bw) of 12-in. GI (typ.) C13 C14 C15 C16 Fig. 2 - Floor Plan for Problems 2 & 3.
Problem 3. The beams, e.g., B1 (typ.), are also cast with fe' = 5,000 psi (normal weight concrete, 150 pcf. B1 = 0.8). Use d = h – 3”, for both positive and negative bending. (a) (10 points) Determine per AC1318 the effective flange width (be or bj) of a typical beam, B1, subjected to positive bending. (b) (20 points) Use where applicable a be (or b;) of 76-in [i.e., ignore the one calculated in part (a)], compute the minimum flexural reinforcement required (i.e., As min) and its corresponding design bending ($M)) of B1 for positive bending only. (c) (20 points) Use where applicable a be (or bi) of 76-in [i.e., ignore the one calculated in part (a)], compute the maximum flexural reinforcement required (i.e., As max) and its corresponding design bending ($M) of B1 for positive bending only. Use & = 0.005.
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!