Laserfiche WebLink
I I/ IJ! sL'J V I IQ J I rnn <br />t <br />Project, Pierce Adit_Dul)cherd, Sta. 3+04 <br />12' Thick, 12' Wide, 12' Hiph, 96 Rebar <br /> <br />By N11:EL/JFA Date 10/30/07 <br />Sheet 7 of 8 <br />Critical section shear strength for 12-ft thick reinforced deep-beam concrete bulkhead <br />subjected to maximum credible earthquake: <br />Deep-beam bulkhead defined as wb/Lt < 4 (ACI 318-02, Sec 10.7). The critical shear section is 0.15 <br />times the maximum bulkhead width (2.25 ft) from the ribside (ACT 318-02, Sec 11.8.5). <br />wb <br />= 1.0 which is less than 4. Therefore, this is a deep beam for design. <br />Lt <br />When wb/Lt < 4, the limiting nominal shear stress (v„) carinot exceed <br />10 times the sq rt of f, (ACI 118-02, Sec) 1.83). <br />vn := 10•V v„ = 5=48 psi <br />Therefore, the maximum allowable nominal shear force per foot of beam width is: j <br />Vna := vn• 12•b,,; d Vn, = 923460 lb per 1-ft wide horizontal deep beam <br />Nominal developed shear force at critical section per foot of horizontal deep beam width <br />I <br />Vnd := 0.35•u'wb V„ d = 58632 lb per 1-ft wide horizontal deep beam j <br />Factored nominal developed shcar force at critical section per foot of horizontal deep beam <br />width <br />Vu := V"d V„ = 78176 lb per 1-ft wide horizontal deep beam <br />?rs <br />Nominal developed moment al critical section per foot of horizontal deep beam width <br />j <br />MAII := 0.06375 u• (wb') M.n = 64077 ft-lb per l 4't wide horizontal deep beam <br />2 <br />Factored nominal developed moment at critical section per foot of'horizontal <br />deep-beam width <br />Mn <br />Ma = 71 l 96 ft-lb per 1-ft wide horizontal deep beam <br />n <br />i