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'') -t-
<br />Appendix B
<br />Apparenrt Elastic Modulus
<br />TABLE E":1"1
<br />Apparent Etastic Modulus for 73.F (2S"C)
<br />Duration of
<br />$ustained
<br />["oading
<br />;ll:i'j, lgyli:: _::ryl pesxfi,rri, piliit,,,f,ffi ' ;re based on
<br />"'t"if #i:':ii,",rx[ni'j-:'^g'l"j:]l"trul.,''nurffi
<br />naior lrac'rrn.,- o,=_*,.jo,319.tphousi content - a paramgter that is reh""t"Ji,r a retr,c rr.^-i
<br />flqfi,jl;:lfl i:i,[['ffi 5ff#X,tr;Etffi ,y:Tdii :rri!];ffil,flri's;ff iilof this code is pru."ni"o in chapt€r $. )atogory in accordirnce wlth AsrM D5ss0
<br />(2)
<br />,H];l,ffii.Tli.llff"::s.:Tffi!1"-j:-!"lh.the condtion of sustaingd and consrant roacJinothe resurt*nt $rrain incr€ases w*h incroasoJffi"{iJd.ij'r;ffiTifr:,TiffHii:fffltinitially generated stress gradually,"fu*r, *itf-t in"rlased time).(q
<br />J::,i:ifl,HffiYi,:1f '39|.
<br />are.basod on resurts obtainod u.nder unf-axiarroadrng, such as
<br />rs inhibiterJ. ,,r.i.r" ,^.,,u^el-t: :rytli"g toad..When a pE is subjectej;; ilii:#;", srresqihd iris inhibitorj, which results in a ",ir"*iril;#,;::::
<br />is suo.tecrsd td mutti-axial strossing itr
<br />pipe that is subjectod to i,,t":^t^?T?yhat
<br />higher apparen-t modulus' F.,. t;ilpl;;?; apparonr
<br />2s%o srearor than rhat ,"""j:TL3{lt:?llJg ?,:"trl: -.a conditlon t
<br />"t
<br />i"JrJ..'oi'jaxiat srrese:i,TJJ:i[iff !J::t fff"Ji..J|?$f; ili*:: :ff ,];."*?jl,:il!E jti:;ff ::tr:
<br />a major factor
<br />Hencs, the
<br />Codo. The
<br />explanatlon
<br />(und€r which
<br />whlch an
<br />in a test
<br />strain response
<br />ofaPE
<br />- is about
<br />estimato
<br />lf thero is
<br />B.l- - Apparent Elastic Modurus fbr the conditiofr of Either asustained O0nrstant Load or a sustained constant Defnrmr'L L..,qu u, i, ouslatneO L;onstant Deformatio
<br />B'1-"1- - Design Varues for the Base Temperaturg of 73"F (23"c)
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