Question

1.) According to the requirements of the International Building Code (IBC) as well as the values requires by ASCE/SEI 7-10, the following equations conform to their requirements for the use of load factors. (a) U 1.4 D (b) U- 1.2 D1.6 L+0.5 (Lor S r ..ACI Equation 5.3.1b (c) U-1.2 D + 1.6L (L, or S or R) + (L or 0.5W) ACI Equation 5.3.1c (d) U- 1.2 D+1.0 W+L+0.5 (Lt 1 or Si or R)ACI Equation 5.3.1d (e) U 1.2 D+1.0E+L+0.2S.. ACI Equation 5.3.1e (f) U 0.9 D +1.0 ACI Equation 5.3.1f (g) U 0.9 D+1.0EACI Equation 5.3.1g ACI Equation 5.3.la Where U the design or ultimate load the structure needs to be able to resist D = dead load L-live load L,= roof live load S snow load R = rain load W wind load E seismic or earthquake load effects The above equations for items (a) - (g) conform to ACI equations 5.3.1a to 5.3.1g respectively. Based on the above information and given that the compression gravity axial loads for a building column have been estimated with the following results: D-150K; Live Load from roof, 60K, and live load from floors, L-300K; compression wind, W-70K, tensile wind, W-60K; seismic load, E 40K; determine the critical design load using the ACI load combinations presented above (20 pts) 2.) Define the following terms as used in your reinforced concrete design and their use(s). (a) Load factors (b) P (c) fe and fy (d) Mn and Mu (e) WSD (D) Modulus of rupture (g) moment of inertia (h) n and E (i) Mcr G) As (10 pts)

Answer 1