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ToN(i cONG'rY xDCi'G'r - crcP BDr{ DA LA soN - rir r" LoAN , 4i' \i,: JJ iIDII: L\-TL I t' Diitr ,lttnh htrtt t',; '/ti tirit klre trt git'iu r[rtty lLro.'c liAtr kir hirn thal'c'lto liitt ktit htr l6ng sr ,] {]ONG I{OA XA HOT CHI, NGHIA VIET NA}I DOc lip - Tu - Hanh phf c Dtr \-ing, nga!- ,/0 thang 05 num 20I6 ,ltlrtg clto ctit' grii tltuu XL25, XL26, ,YL27 Dtr tin firdng I{6 Chi L[inh, cloun Lct Sott - Tin Loun Kfnh gui: - C6ng fy TNHH dAu tu BT Cam LQ - Triy Loan - Tu vdn QLDA - Ban QLDA dud'ng tlO Ctri Minh - C6ng ty cd phfln TVXDCTGTS (TECCOS) Cdn cu Hqp dong xay clung so 39/2015/HDTC ngai,' lOl02l20l5 goi thdu XL27, Hgp ; ,^ goi thau XL25 ngil'25/0312015, Hgp d6ng xd,v dlrn-e so dong xal'dUng so 571201S/HDTC 7l?AlsiHDTC -soi thAu XL26 0112015 gilra c6ng ty TNHH dAu tu BT Carn Lo Tirl'Loan vd T6ng c6ng t,v XDCT giao th6ng - CTCP ,t Cdn cu tir;Ot fe ky thudt dd duo c phO c1u1,'6t Can cu'chi din Theo tni5t fe k.-n k-V thuat cua du 6n thuat va thi0t f6 Uan vc thi cong c6c cAu la khe co gidn rang luoc li6n kOt bang bu l6ng HiQn mQt s6 du 6n dang chu-u-6n 6 F: F i tr so o4 o:i u:s 1T o o 'i! ,tI il*hJ \ < ie iT e i F - z E* ,/ o o o = F = J o 2.9 |-: E F F = i = ,a ;=g ! !g R ll o o B - o d a a g EB t a a o >6 F: F o F o tr o i E E {6 -t^1 o (, q a a !l l I 'o o z ,o I F 4l< 6t^ o *l i l-E EE t ++ + : :l v AS LA SON - TUY LOAN -' ""i"tT($i.i-\: x , ruvi!XUiTDu'rG/ fircurenolr snsrr oF FTNGER ExpANsto\ vilt'trhtul€J.c {r x94 .\r^ / o^ lotNT vHF-c8o Item Ens Design Date Sign 4l2tl2o16 T.D'T Check Revised 3F'rP.svHF - C80 to AASHTO LRFD and NCHRP 402 Inrnrt parameter - Finger expansion joint capacity 80 - Lenqth of tooth ofthe expansionjoint 120 - Thickness of expansion joint h - Width of looth of the expansion joint b 30 63 - Yield srength ofsteel 345 Mpa 6t s /ca j [,, s Loads 2.1 Loads of the strength linit state a Verttcal load (wheel lodd) - Expansion joints shall be designed to resist the load combination for Strength I limlt state wich is specified in table 3.4.1-l for simultaneous application ofverticaland horizontal axle loads specified inArticle 14.5.7_2, distributed as specified in Articte 14.5.7.3 - The vertical load for strength design shall be the desiqn tandem axles specified in Article 3.6.1.2.3 (LRFD, article 3.6.1.2.3) - Dynamic coefficient - Ampllfied vertical axle load (LRFD, article 3.6.2-1) II\4 = Fv,Me=F,x(1+IM) - VerUal load for wheel 110 15 192.5 96.25 kN a/a kN kN b Horizontal load (wheel loads) - The horizontal load for strength limit state design shall be 20olo of amplified verticat axte load - Horizontal load for axle - Horizontal load for wheel (LRFD, article 14.s.7.2.3) DFns = DWrs = 38.5 19-25 kN kN 2.2 Loads for Fattgue linit state a r'i th;ng dhq - As per Article 14.5.7 2, the system shall be designed lo resist the simultaneous application ofvedical and horizontal loads from a tandem axle As specified in Article 14.5.7.2.1, the appropriate axle for fatigue design is the largest axle load from three-axle design truck specified in Afticle 3.6.1.2.2 - This axle has a gross weiqht of 142 kN As per 14.5.7.2.1 this axle shall be considered as the total load on a tandem axle Therefore the actual design load consists of two 71 kN axles spa.ed at 1200mm - Vertical axle load M= Dynamic coefficient - Amdified verticalaxle load - Vertical load for wheel - The horizontal load for strength limit state design shall be 20olo of amplified vertical axle load 71 75 124.25 0.725 kN 0/o kN kN (LRFD, article 14.5.7.2.3) DFsr = DWrr = - Horizontal load for axle - Horlzontal load for wheel 24.85 72.425 kN kN Calculation of th€finger expansionjoiht a: io2o5, '7- ,rPialG 'oYY( PUON iNri t':- l (F r ,:i 3.7 Checkirrg streDgth limit sta@ - The total force effect shall be satisfied the formula as follows: Shrx grx Q < FR" (LRFD 1.3.2.1-1) - Calculated vertical load 60r wheel at the streng$ limit state W6dhe = hxg + Load factor for strength limit + Load modifrer x Wvs,Anp W,*,e.p state factor: h = hD x hR x h 185.70 KN S t.75 h 1.1 S u737.7 mm2 q1 2207.7 kN/m2 - The average stress from acting on the wheelsurface expansionjoinE: + Surface area subjected to wheel in the most unfavorable + The average circumstances: stress: ( Be calculated in the worn case when na,yimum expansion ) - Calculated horizontal load for whe€l at strength limit state DH,.!.A.D 'The = h x g x DH"s.bo + Load factor for strength limit siaie + Load modifier fador: average stress from acting on ( LRFD table 3.4.1-1 ) kN 1.75 1.1 fle wheel surface expansion joints: + Suface area subjeded to wheel in the most unfavorable circumstances: + The average stress: 37.74 a4fit.7 mm2 441.4 kN/m2 ( Be calcula@d in the worst case when maximum expansion ) - llaximum moment at point A l4a 0.41 kN.m + Tooth size under the effect of load (Be cahulated in the wost case when iaximum expansion) B= - Tooth width at the position of the largest lYoment: - Tooth length at the position of the largest l4oment: - Section mudulus of the toe of tooth 0.0630 0.0700 m 0.00000945 ml - Checkinq svess at the toe of tooth sd=Ma/Ws s"=fxFY sd = Where: Resistance 43259.9s kN/m']