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11/13/2007 13:59 FAX <br />160181018 <br />Project, Steve Adit Bulkhead, Sta. 2-65 By -MEL/JFA Date 10/30/07 <br />10' Thick, 1.0' Wide, 10' High, 46 Rebar Sheet 8 of 8 <br />Calculation equation for allowable shear strength (VO at critical section of deep beam, <br />including rebar tensile reinforcement, <br />Vc := K. 1.9•? + 2500.pw- Mu 12 -12-bw-d <br />Maximum permitted calculated concrete shear strength (v,): (A.Cl 318-02, Sec 11.8.3) <br />VC := 6•?-f, vc = 329 psi <br />As <br />Ratio of rebar reinforcement area to concrete area (pW), p,v :_ - hW = 0.0003147 <br />b,,.12. d <br />Limiting value for term K = [3.5-2.5(M,,/V,d)] = 2.5 <br />3.5 - 2.5- M d K = 3.305 Therefore, k{•= 2.5 <br />Vu <br />12 <br />Allowable shear strength (V,) at critical section of deep beam, <br />Vc := K. 1.9•?T' + 2500•p,,,. Mo . 12 •12•bw•d <br />Vc = 398894 lb per 1-ft wide lwrizontal deep beam <br />Limiting allowable shear force cannot exceed: <br />Vmax := v.-bW 12•d V,,,,,,x = 459430 <br />Factor of safety using the lower of calculated V, or Vmax in relation to maximum credible <br />earthquake loading, induced factored nominal developed shear force (V„) at critical section, <br />V max <br />F:= FS = 7.667 <br />Vu