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Project Design Mogul Tunnel Bulkhead By JFA Date 8/21/03 <br />10.6' x 9.5' f 8' Thick. Station 2+411 <br />.Sheet 6 of 6 <br />Critical section shear streneth for 9-ft thick reinforced a~ncrete deeu-beam bendin¢ <br />stress desisrn for earthquake acceleration: (Continued) <br />Ratio of tensile reinforcing steel (p w): <br />As <br />p ~,, := p w = 0.00063 for one two-way row of #6 bars, 12-in c-c <br />b W•12•d <br />Allowable concrete shear strength (V ~) at critical section: <br />Vc:=K•(1.9• fct2500•pµ,•1~u•121.12•bµ,•d ,Vc=373411 lb <br />11 u // <br />Limiting allowable value for term V ~ cannot exceed V <br />msx <br />Vim:=(6• fc)•bµ;12•d Vm~=412106 lb <br />Use lower of V ,,,~ or V ~ to calculate factor of safety for factored critical section shear stress V u <br />V <br />FS :_ ° FS = 3.62 <br />Vu <br />