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<br />.
<br />
<br />8RfOGES ON LEVEL OR UNIFORM GRADES
<br />
<br />V't.5pOTi
<br />,
<br />(ffauncfl I <' I Top of (/{1IS!d!O slob
<br />
<br />, i"~
<br />_ ,,~ " , __- Top of beam and
<br />r-- --:....-.~ /~ bottOTrrOfhOUTiCh
<br />-c: f (oora!Jollc)
<br />L~,___l,_f..L__'L~ ' ,. _,. I '0 Of
<br />L I "-,~ -,1 I "eC!,e ILD ~p
<br />____ Span " I undeflected beam
<br />
<br />FIGURE I
<br />
<br />BRIDGES ON VERTICAL PARABOL.IC CURVES
<br />
<br />CASE 1
<br />
<br />l..-f Scon
<br />,
<br />
<br />Hounch~
<br />,
<br />
<br />.rS
<br />
<br />,-y
<br />
<br />.....lOOi'r flMshedsJob
<br />
<br />
<br />"""T-- __ _ -:- / Tep L'f beam orJd
<br />, bottom of hounrh
<br />------_iJ"C,-~ _ (p<lro[>O!(c)
<br />
<br />----Z_ ''-lhl?oref,col top Df
<br />_~ llfldl'fJeclrdbeom
<br />
<br />Span
<br />
<br />FIGURE 2
<br />
<br />(Road'lloy surface with ((lnveJ vertlcol parabellc curve)
<br />
<br />CASE rI
<br />
<br />r--It. Span
<br />
<br />HOiJnCfl
<br />
<br />]-L_'
<br />1'-
<br />
<br />~S
<br />
<br />Tapaf fw!s/leds/ob
<br />Top of l1eom and
<br />bottom of hounCh
<br />(parabolic)
<br />
<br />"/
<br />
<br />~
<br />t t I /~l
<br />--I --_~__~Cl-j
<br />L 1---- L
<br />---spon------~
<br />
<br />Theoreflcol fop of
<br />undldlecfed beam
<br />
<br />FIGURE :5
<br />(Roadway surface with CDncore ver/"Ica! paraba!,c c'Hie)
<br />
<br />.
<br />
<br />SYMBOLS
<br />C, -=Upward camber, meosured WI!h beams In placc'
<br />.1 "" Downward defleellon Caused by plaCing slab,
<br />dlaphragm/sj. barriers, ral/logs, Dnd weonn4
<br />surface.
<br />h"" Haunch Ihlc~ness at ends of span.
<br />S "" Nominal slab 1t1lOneSs
<br />y '" Mid ardlniJte (Figure 2) or end (Jrdmafe
<br />(Figure 3) for >~rtlcal parabOliC curie alono
<br />length of span.
<br />For FI!JuI'es lane J
<br />I:; Hoof/cn thl(~ne~5 01 center cd span
<br />For Figure t!
<br />y ~ I =Hounch thlOness JI center of span.
<br />
<br />.
<br />
<br />.
<br />
<br />NOTES
<br />I Prestressed pruost-cancr~feb<,(]mSI!5 ri'C!'lved from the yord
<br />'.1iI11 na>'! fJrl vpwl1rd camlYH '(',', 'oI,tw:h should be mel1svred .JOer
<br />tJeoms {lOve be~n placed A vallie of "c,~ 15 assumed for pr~'ponng
<br />drllwmqs The comber f~l/I vary wllh the 5f.'an lenqfhs Gnd IS
<br />'!xpecleri 10 ~ary same Detween Deams of equal length Flqures 1,2,
<br />und J, "ruslrate tyolcol conditions The nomtnol thickness "5' of
<br />Ine Slob 011!J file !JO'lt'nl'tar!J flenertlon ",1' roused by placmq the
<br />stab elc ore qlven on tl:e dl!slqn drawlI1l)s [fe~l}tlanS arf' CQlTl(AJfed
<br />on on aH1Hr.l!d vallie for .CI: as gIVen on The d(awtnQs
<br />2 At .7Ilflspan. !t,e beams wlllfleflec! the amount ".1" when the
<br />concrete in the slob, d!Ophraqmfsl, elc IS placed
<br />J In normal deslqns C,. .",11 ol'ftays be lerger fhan the
<br />calculaled "il", shOVrn on !fIe Grawinl]s. hence'
<br />F,'r ondq~'S on level Dr uniform grades, see Flqure I,
<br />Ihe haunCh ffllckN!SS 'h"at the ends of the spall shall be
<br />h "" C, -il ~ f
<br />For bfidgl!s 011 convex vertiC'll parabul/l; CI)rvI!S,S"'~ r'gure 2,
<br />the haunch !hlcKness 'h"a! the ends of the S(J:Jn shall be
<br />fl= CI -.1' I. and sholl be h =Y" t 01 midspan.
<br />FOI. !:ndgp.s 011 cal'COv~ verllcal porobrJl,c curves, sep. Figure
<br />J,lne haunch IhlOnes$ "h'OI the end:; of the sf]an sholl be
<br />h ~ C, -,1' I' Y
<br />t/ Fur b"d-<e~ an level or 'Jndarm groaes, Ine (Inished rQljd~ay
<br />surface ~hall Or.' level or 0 unlfarm grade 05 ShOWN on the
<br />drov;!f'gs. For multiple SpanS, Ihe haunches of all spans be
<br />1j'/juSted to malnt'J,n Ihe rt!'lulr'!o Il!velor ul',form qrade
<br />alonqlhc'bndge
<br />For bnd'}es on ~'er Ilcal paraboliC curves, the finiShed
<br />roadway sI"facc shall form I) verfiCal parl1ballc curve
<br />whlcn passes thrOur;h the raadwoy elevatiOns qlven on
<br />Ille drawmqs For multIple spans. the haunChes of a/I spans
<br />s.~a/{ De ad)'.I51-:d to obtain a finiShed rOadway surface which
<br />conforms fa tM: ver!lcoloaraboll( curve and Itse/evatlems
<br />05 qlven on the drawmqs.
<br />
<br />..t>..
<br />1'_)
<br />,p.,
<br />L.~
<br />
<br />I 4-7 - 7Z I
<br />Ip <~I
<br />I
<br />
<br />CHEcJ(E/).
<br />
<br />@ ALWAYS 11-110'" SA-FETV
<br />
<br />VN."TEO srArES
<br />OEPARTMENT OF THE INTFRIOR
<br />8UREA<.1 OF RECLAMATION
<br />FR>'IN(JPAN - ARKANSAS PROJECT-COLORADO
<br />PU~BLO DAM
<br />NORTH SHORE ACCESS ROAD
<br />PRESTRESSED CONCRETE BEAMS
<br />OETERMINATION OF HAUNCH OIMENSIONS
<br />
<br />D~ "a..~,JI.. ,.
<br />
<br />~UIUI1T1~D
<br />IIrc:o,uIllEI;OEO ....: ....---
<br />>,
<br />
<br />N
<br />o
<br /><D
<br />
<br />0........'" -'5';"
<br />CH[ClCEn t!&/
<br />
<br />,""PRovrD
<br />
<br />&>EN'"'EIt, <:"D.O".OO,
<br />
<br />rn." ".~;I
<br />
<br />362-0-1591
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