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08-14-2003 05~56RM FROM FERRN ENGINEERING SERVICE TO <br />I I <br />i ! <br />i! i <br />2475104 P.06 <br />~ I <br />i <br />i. <br />By y1FA ' IJ~,te~4/G3 '~ <br />i <br />Sheet 5 ~ of ! C 6 <br />~, on sn acres z r y-n mictc r im rcea concrete aee u m <br />' s~' ess d ~ ° "' ~ for ea uake acceleratiou: ', '• ' <br />i <br />17~eep beam d fined a~ Ud~S (ACI 318-95, Sec 11.8.1). This is the case for earthqualFe acceler <br />0~094g azld c • iaal section sh~ear'at 0.151(1.20 ft) from n'bside (ACI 315-95, Sec 11.8.5). <br />ij Q <br />'• ~ d2 l = 1.1481 < 5 Therefore, this is a deep beam for design( <br />I~ <br />! v'Q -nominal hear stiess shall not be greater than 8 times sq rt of f o whenW~ < 2;Qi4C <br />I i ;Sec 11.87) ~: <br />I .j II I 'I ~. <br />j' ~ Luniting values: v ~ :=;:8. 3000 v n = 438.2 psi li <br />~. I <br />~. <br /> <br />~~ V: ~ :~ v n ~ 12 <~ p,~d I V n = 549475 16Aft, limiting, shear force per foot of bears <br />width <br />webped shear fc~Ge'at critical s~tion: <br />! .i ~ ~I <br />V ~ 035 •u•1 ~ n = 82682 lb/ft, nominal shear force per foot ofbe~mm <br />! ~ ~ width ' <br />~~;•~ V ° V:u =97273 Ibfft, factored shear force per foot of beam width <br />~; ~~~ <br />!f <br />velopedi moment at;critical section: <br />!~ <br />~i 2 , <br />n := 0 0~37i~°~ ~~) M u = 73299 ft-lb, nominal critical bendmg mori~ent purr fc <br />beam width ! I <br />M e <br />M u :_ -, M u = 83666 ft-ib, factored critical bending moment per $oot o~bea <br />~ I ' ~ ~ rt~ width <br />I'~rmitted concrete shear stren v <br />8~ ( c) ~. <br />1;'thntittg value foi• v~ ,: v c :_ 6 f c (ACI 318-95, Sec 1 l .$.7) ~ ! <br />I ~ <br />! ve =6 f~ 'i ~ ve,328.6 psi <br />i I V ! i <br />i. <br />2! 3 <br />m of, <br />i <br />II! <br />1$•95; <br />it <br />i <br />i' <br /> <br />of <br />i <br />~~ <br />HgIB1o11emkd S~Y1963231;1~d <br />! I.t}piti~g valueiforjterr'n K = (3.5-2.5(M„/V ud)] _ <br />' 2.5 II ~.3:M u; <br />, K,:= 3:3 - ~ K = 3.233 i <br />V; •d , i <br />