KHOA HOC - CONG NGHE I I I I I
XAY DUNG CHUDNG TRINH TIT DONG HOA TiNH TOAN MAT MAT llNG SUAT
TRONG CAU DAM DE TONG COT THEP UiNG SUAT TRITOC THE0 22TCN272-G5
TS. PHAM VAN THOAN Vidn K? thugt cdng trinh dgc bigt (ITSE)
Itm tat:
Bdi bdo trinh bdy cty sd /y tfiuySt, kit qui xdy di/ng chuong trinh t^e (3^ng hda vd vf di^ tinh todn cde tog/
m^t mdt ung suit trong ciu dim BTCT ung suit tn/6c theo tidu chuin ngdnh giao Uidng v$n tdi 22TCN 272 -05.
Abstract:
This paper presents the theoreticai basis, the results of building automation program and example calculation of the stress loss In prestressed concrete girder bridge in the transportation industry standards 22TCN272-05.
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Dim bd tdng elt thdp dng suit trude edn gpi Id dam bd tdng cit thdp ung lyc trudc hay bd tdng cit thep dy dng lyc (tdn gpi Hdn-Vidt) Id kit elu be tdng c6t thep su dgng sy kit hyp ung lyc cdng rit cao cOa c6t thep ung suit trudc (edp) vd sue chju ndn cua be tdng de tgo ndn trong kit clu nhdng biln dgng nguyc vdi khi chju tdi d ngay trude khi chju tdi.
Ngay tu giai dogn cdng kdo cdp, do nhilu nguyen nhdn khde nhau, dng suit ban dau trong cdp se giam din theo thdi gian gdy ndn sy tin hao (mit mdt) ung suit. Do dd, trong thilt ke dim bd tdng cot thdp dng suit trude, ta eln phdi tinh todn cde logi mat mdt dng suit trong cde bd cdp. Vige tinh todn mat mdt dng suit khdng ehinh xde (qud thIp hode qud cao) diu cd hgi vi c6 thi tgo dO vIng vd ehuyin vj dpe qud mdc.
Td trudc din nay, vile tinh todn ede togi ton hao dng suit trong d u dim BTCT Id mOt cdng vigc phdc tgp da tidu tin nhilu thdi gian, cdng sue cua sinh vien khi lam d l dn vd ky su thilt k l elu. Tuy nhien, trong tong the thilt k l vSn chua cd tinh ty ddng hda vd ehuydn nghigp cao. MOt sd phin mim phdn tieh kit clu chuyen dgng cho ngdnh clu nhu Midas/eivil. Sap2000 dd dio phdp
I S6 4 ndm 2013
nhdp cde logi cdp dng suat trude vdi ede dde trung hinh hpe vd vgt ligu ciJng tai trpng cdng cap nhung nOi dung tinh todn mit mat ung suit vd ea phin thilt k l cdn nhilu hgn ehl.
Vi vdy, xdy dyng mOt chuang trinh nhd nhlm ty dOng hda tinh toan cde logi mat mdt dng suat trong cau dam BTCT dng suit trudc bdng tilng Vigt theo tieu ehuin ngdnh giao thdng vgn tai 22TCN 272 -05 Id dilu can thilt.
2. CO SOT ly thuyet
• cAc KHAI NIEM c a BAN
Cot thdp (edp) trong dam bd tdng cot thdp ung suit trude Id cot thdp cudng dp eao duye kdo cang ra bdng mdy kdo dng suit trudc dat tdi mOt gid tn dng suat nhat djnh duyc thiet ke tardc ndm trong gidi hgn dan hii cua no trudc khi cac ket elu be tdng cot thep nay chju tai. Nhd dd, kit elu bg tdng cot thep ung suit trudc cd thi ehju tai trpng Idn gan gap ddi so vdi kit elu ndy khi khdng edng cot thep dng suit tn/dc. Khi chju tai trpng binh thudng, biln dgng do tai trpng gay ra chi du de trigt tieu bien dgng do cdng trudc, kit clu trd Igi htnh dgng ban diu trude khi edng, gilng nhu khdng h i ehju tdi gi (xem hlnh 1).
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m i l KHOA HQC - CCiNG N G H $
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Hinh 1: Md ti khii ni$m dam be tdng c6t thdp ling suit trutfC, cic lo^i cip vi thiet bj t^o ung suit tru-dc Hidn nay, theo cdng nghg che tgo, n g u d i ta phdn chia d i m be tdng e l t thdp u n g s u i t tarde thdnh edc logi sau ddy:
• D i m bd t d n g c d t t h d p d n g s u a t t r u d c c d n g t r u d c . D i m bd tdng e l t thdp d n g s u i t trude cdng t r u d c d u y c t h y c hidn trdn nguydn t i c edng trude cdt thdp trdn bd c l djnh hodc trdn vdn khudn thep du chju lye edng, ddt e l t thdp thudng vd d l be tdng dam. Sau khi bd tdng da khd cung mdi e l t e l t thdp d l t n j y I n tryc t i l p lye edng vdo k i t e l u (xem hinh 2).
5mm, hogc tao cdp 7 s y i d u d n g kinh 12,7mm hodc 15,2mm, c u d n g dO tdi 1800 MPa. Bd tdng cd t h i dCing d p 35 - 40 Mpa.
• Dam be t o n g d n g s u i t t n r d c c d n g s a u . D i m bd tdng eot thdp d n g s u i t trude cdng sau hay cdn gpi Id dam be tdng cdt thdp cdng trdn bd tdng Id k i t d u trong do dam d u y c che tgo trudc, trong dam cd chua s i n cac Id d l ludn cde bd cdt thdp. Sau khi bd tdng dgt dO eudng dd, t i l n hdnh edng cdt thdp, t y a vdo hai d i u dam de t m y l n l y c ndn vdo bd tdng. L y c cdng topdc d u y e g i d b l n g edc neo bd tri d hai dau bd ddy, ti tryc tiep ldn be tdng da khd c d n g . Vige edng kdo edc bd cdp t h u d n g thye hign b l n g ede kich thuy lyc. Trong k i t d u cang sau, t h u d n g dung cde bd cdt thdp nhilu syl, cac tao cdp 7 s y i d u d n g kinh 12,7mm: 15,2mm ho§c bd Idn gdm n h i l u tao. N l u dng bpe khdng d u y c bam vua, thi k i t d u d u y c gpi Id khdng dinh k i t , trong dd khi ehju lyc, cdt thdp vd bd tdng vdi b i l n dgng khdc nhau cd I h l t y do t r u y t Idn nhau. Tnj-dng h y p ndy, khi chju tai k i t d u Idm vide n h u mOt d i m durq^c tdng cudng b l n g mOt thanh cdng (xem hlnh 3).
B*t64<b Dm ETC:
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Hinh 2: So <l6 b$ cing cit thip trudc khi di bi tdng chi t$o dim BTCT Ong suit tn/dc cing tru&c
c l u bd tdng dng s u i t t r u d c cdng t r u d c t h u d n g d u y e s u dgng cho cde nhjp nho vd tnjng. V d i edc nhjp 10;
12,5; 15; 18; 30m, trudng h y p dde bidt cd the dgt e h i l u ddt nhjp tdi 40m hoge h a n , neu d i l u kidn vdn c h u y i n cho phdp. Cdf thdp cho d i m bd tdng cdt thep cdng t r u d c thudng dung cd c u d n g dO tdi 1800 MPa.
Bd tdng cd t h i dOng d p 35 - 40 MPa. D i m dng s u i t trude cdng trudc cd chi tidu kinh t l tdt ndn cd 6[yc}fc s d dgng rOng rdi d n u d c ta.Tilt didn ngang eua d i m cdng trudc vd cdng sau cung d y a trdn nguydn t i c chung v l vdn c h u y i n vd ldp rdp tue Id t h u d n g dCing t i l t dign T d a n , T kdp, super_T. Odi v d i k i t d u kdo tnj-dc t h u d n g dCing d t thdp s y i d u d n g kinh D = 3 - 5mm gpi Id d t thdp ddy ddn, hode edc tao cdp x o l n dc 7 s y i , d u d n g kinh 12,7mm; 15,2mm. V d i cde nhjp 10m, 12,5m, 15m vd 18m cd t h i dung d t thdp ddy ddn d u d n g kinh 3 -
Hinh 3: Sa 66 kia cdng cdt thip sau khi dd bi tdng
• Dam be t o n g d n g s u i t t n r d c c a n g ngodi. Cde bd d t thdp trong d i m bd tdng d t thdp ung s u i t trudc cdng sau ed t h i dgt trong hodc ngodi bd tdng, n l u bd d t thep ddt ngodi ta gpi Id k i t c l u edng ngodi. K i t d u cdng ngodi t h u d n g Id k i t d u khdng dinh k i t .
• T l N H T O A N C H I N H X A C C A C M A T M A T CTNG S U A T TRONG c A c B 6 C A P CTNG S U A T T R L r ^ C P h i r o n g p h d p c d n g s a u
T i n g tat d edc mat mdt d n g s u i t trude trong d c d u Idgn kdo sau d u y e xde djnh theo edng thdc sau:
Bang 1 : Cde logi m i t mdt dng s u i t theo phuong phip cdng sau
Mat mit i>ng suit ti>cthM A / p ^ :mini«i)n9sui*m8s*
A/"^ -.nAnAinqaAdatilmrm,
A / " ^ nAi^iing = * * " " » * " ' ^ f * ^
Hit mit ^ suit theo thM gbn A / " ^ : mJE ma i>ng sit do CO ngdi;
A / 1 ^ •.nArnH(rrqsukia\ii\Ai cuabeUng:
&f^ :inilmitungadlfti(t3oHp:
KHOA HQC - CONG NGHf I III I
'Tinh mit mit img suit do ma sit giOa cic bd cip img suit tnr6c vi ing b(?c:
A/;.=/,,.(l-.^-"-');
f„: i>ng suSt trong dp Crng suit Xniac khi kich (Mpa);
frt=(0,70-0,80).g
',„: aibng 6(> gi6i hsin chju k6o cua dt thip img suat tnrdc thipdng lly f = 1860 Mpa;
T'^
Hinh 4: Ciu t^o vi bi tri cip X : chilu ddi bd d t thdp dng suit trude td diu kich din dilm dang xdt;
a: Id gde tgo bdi d t thdp nghidng so vdi tn,ic dim (xem hlnh 4).
e : ea sd logarit ty nhien(ndpe);
K: hd sd ma sdt lie trdn mm eua bd cdp, K= 0,00000066 (xem bdng 1);
/ / : hd sd ma sdt, = 0,2 (xem bdng 2);
Bdng 2: Xde djnh cde hd sd K vd //
Lojlthip
S9i hay tao
Thanh arbng dO cao
C^c lofil 6ng bfc Ong thdp ma c^ng hay nLraci>ng V$tli§uPoiyttiylene Cic 6ng chuyan hi/dng b^ng thfip cCpng cho b6 thfip ngodi Ong thfip ma
K 6.6.10»(-7)
6.6.10«(-7) 6.6.10»(-7)
6,6,10«(-7) P 0,1M.25
0.23 0.25
0.30
'«p • '°n9 "'"9 suit trong bS long tai tn?ng tam c6t thep iJng suit tn^oc gay ra do Ig'c cSng tnrdc (Np) vi mo men do tnjng luo'ng ban than (Mgbt);
e : dp lech tim cua c4c bo cot thep Crng suit Inrdc so voi trgc trung hoa cOa tiet dien;
A., : di$n tich tiet dien ngang;
I., : mo men quin tinh cua tiet dien ngang;
^ri : m6 dun din hoi cOa be tong luc cang keo cip ling suat tru6c, vi dg lly = 0,85.Ec = 28895,3 Mpa;
Mg^, : mo men do trpng Iupng ban thin gay ra;
Np : iyc n6n tnTdc trong be tong do Crng suit trudc gay ra tgi thdi diem sau kich keo. tCrc la da xay ra mit mit ung suit do ma sit v i tgt neo:
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*Tinh toin mit mit ung suit do co ngdt:
A ^ , = 9 3 - 8 5 J /
H : dO am tu-ong doi bao quanh kit clu(m6 tardng), vi dg lly H = 80%;
Tinh toin mit mit Ong suit do tif biin cua bi tdng:
I. " '
*Tlnh mit mit Ong suit do thiit bj neo:
A/"H
L '
A dd gidn ddi (tgt) eua neo, vi dg lly = 1 cm;
md dun ddn hii eua cdp ung suit trudc;
chilu ddi nhjp dim tinh todn;
'Tinh todn mit mdt ung suit do co ngin ddn hdi:
^, IN E/'^'"" A, I, I,
N: s6 lupng cic bd cip dif Crng li/c gl6ng nhau.
^cdp '• ^hay dot dng suit trong be tdng tgi tn?ng tdm edt thdp dng suit trudc;
cr^ : dng suit trong be tdng tgi trpng tdm d t thep ung suit trudc do tdi trpng thudng xuyen trong giai dogn khai thde gay ra;
• * * »
^txkt '• rridmen do tai trpng thudng xuydn trong giai dogn khai thdc gdy ra;
I^1 : md men qudn tinh eua mgt d t trong giai dogn khai thdc;
^ : dO Igch tam cua trpng tdm bd edp dy dng lye so vdi taic tnjng hda tiet diOn dam trong giai dogn khai Uidc;
cr„ : ung suat trong bd tdng tai trpng tdm cot thdp
dng suit trudc do ung suit trude gdy ra;
taaaa KHOAHOC-CONGNGH^
^„ M^ -.e^\
^txcc '• f"Sf"6n do tai trpng thudng xuyen trong giai dogn cdng cdp gdy ra;
I ^ : md men qudn tinh cua mdt d t trong giai dogn cdng cdp;
Cj : dO lOch tam cua tn?ng tam bd cdp dy dng lyc so vdi trgc trung hda lOc cdng edp;
* Tinh todn mit mdt ung suit do (y chOng cdp;
^pR=¥pRi+¥pn
Isfpn : mit mdt dng suit do do ty ehCing cdp 10c truyin lye;
A/,. . log(24J)
40 ik_o,55
J py •JpJI
fpjj : dng suit ban diu trong bd edp vdo cudi luc kdo;
t : thdi gian td ICic cdng cdp din lue d t cdp, vi dg lly t = 4 ngdy;
^fpRi '• n^lt mdt dng suit do ty chiing cap sau khi truyin lyc;
Y , „ = ^ . [ l 3 8 - 0 , 3 4 r ^ - 0 , 4 4 / - ^ - 0 . 2 . ( A / - ^ + A / ; ^ ) ]
* Phirong phdp cdng tru-&c khi dd be tdng Tdng tit ed ede mit mdt ung suit trudc trong cde d u kidn cdng trudc khi dd be tdng duye xde djnh theo cdng thue sau:
Bdng 3: Cde Iogl mit mdt dng suit theo phuo'ng phdp
c d n g t n r d c M Jt tnit Ong s u i t
t u v t h M
A / " g j : mix m4t img suit do CO ng^n ddn h&:
M i t mat dng suat theo did*! gian
A/pSK : mit mdt i>ng suit do co ng6l;
^pcx • "1^* " 1 ^ ' "^9 suit do tip bi4n cua Mtdng;
^pK : tnlt mat i>ng suit do dSo tliSp;
^cgp ^ O'SS.fp^, ddi vdi logi tao thdp duye khd ung suit du;
f ^ = 0,70.fp^ dot vdi logi tao thdp ty chiJng thIp (It ddo);
E^i -. md dun ddn hdi cua bd tdng luc edng kdo cdp dng suit tnfde, E^ = D,85.E^ = 28895,3 Mpa;
Ep : md dun dan hdi cua edp dng suit trudc, E = 197000 Mpa;
*T!nh todn mit mdt Ong suit do co ngdt:
H: dO Im tuang ddi bao quanh kit d u (mdi tnj-dng), vl dg lly H = 80%;
'Tinh todn mit mdt ung suit do tie biin cua bd tdng:
N, W..e' M^,
f = -+~^ —e •A r, r, ' '
¥^=<-<^,\
A/~^ : thay ddi dng suit trong bd tdng tgi trpng tdm d t thdp dng suit trudc; o^: dng suit trong bd tdng tgi trpng tam d t thdp ung suit tnj-dc do tdi tnpng thudng xuyen trong giai dogn khai thdc gdy ra;
^ b
Np : lye ndn tapdc trong bd tdng do dng suit tnFdc gay ra;
M^ : mdmen do tai trpng thudng xuydn trong giai dogn khai thde gdy ra;
/ ^ : md men qudn tinh cua m$t d t trong giai dogn khai thdc;
e: dO Igch tam ciJa trpng tdm bd d p dy ung lyc so vdi tn,jc tnjng hda trong giai dogn khai thde;
a j : ung suit trong be tdng tgi trpng tdm d t thdp dng suit trudc do ung lyc tnj-dc gdy ra;
* Tinh todn mit mdt Ong suit do co ngin ddn hdi:
A - ^ f •
' ^ : '4ng img suit trong b§ tSng t^i trpng tim cot thip Crng suit tnn^c giy ra;
M^ : momen do t i i trpng thuimg xuySn trong giai dogn cing cip giy ra;
/ : md men quin tinh cOa m$t d t trong giai doan
cing cip;
KHOA HOC-CONGNGHf # # # # #
^ : dO Idch tdm cua trpng tdm bd cdp dy dng lyc so vdi tnje tnjng hda tilt didn dim Idc cdng cdp;
*Tlnh todn mit mdt dng suit do tie chung cdp lOc truyin ll/c;
frJI '
. log(24.f)
40
•Jpff= 0,74./^-A/;^-Ar,^-A/-^;
/ ^ : dng suit trong bd cdp ung suit trudc vdo cudi lue kdo;
t : thdi gian td lue cdng edp den lilic d t cdp, vi dg lly t = 4 ngdy;
• TlNH G A N D O N G C A C M A T M A T CTNG S U A T TRONG CAC B O C A P 1>NG S U A T TRU6C Cdng thdc gin dOng tinh mat mdt dng suit theo thdi gian cua AASHTO trong giai dogn thilt k l sa bO (Af ):
Bdng 4: Cde cdng thdc gin dung tinh mit mdt dng suit theo thdi gian cda AASHTO Lo^ltlit
dim
Cht) nh$t. bdn d^c
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DJmT.
tidn rfing Mi>cd$
carl li$n trfin Gifi tri tnjng binh GIM h;n
trfin Gifi Iri tnjng binh Gifi In tnjng bInh GiiMh^n
trfin Gifi trj Injng binh
Tao cfip SiFijK khi>
i>nBSijSt(A/„|
200*28PPR
180 128PPR
145 * 28PPR
130 * 28PPR
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Tao cfip ChOng thip
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200-41PPR
180-41PPR
145-28PPR
130-28PPR
3 3 0 k o - 0 . 1 i ^ ^ - * l ^ «
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PPR^
^p--frrpt Jpy s Jy
PPR - ty 1$ dv i>ng li/c mOt phin; PPR = 1,0 (dir Ong llfo toin phin);
A - dijn tich c6t thip lliu^mg trong vung kio (mm');
A „ - di^n tich c6t thip di/ Crng li/c {mm');
f^ - gidi hgn chiy cue cot thep thuong (Mpa);
' „ - gidi han chay cda cot thep dv Crng lyc (Mpa);
Cong thCJ'C tinh l o i n gan dung tong mit mat ipng s u l t ( A / , r ) :
A/,r=4r;„+A,Es;
3. SOT d6 khoi chuang trinh
Hinh 5: Sado khdi tinh toin cic lo^i mit mit ung suit trong dim
4. Ngdn ngiT va cde cdng cu siif dung
Chuang trlnh tinh todn mat mat dng suit Id mOt module con nam trong chuang trinh thilt k l d u BTCT eua tdc gia "KT2012" duyc vilt blng ngOn ngu (dp trinh Visual Basic theo phuang phdp Igp trinh hudng ddi tuyng, ca sd du lidu Acces. Tdc gia phan mem da thiet ke nhtlu Icon cua chuang trinh, ngudi diing ed thi d l ddng truy d p nhanh theo Button hay theo Unimenu dgng cdy, dng dyng nhilu phin mim trong cdng nghd t9o Flash (Sothink SWF Quicker), icon (Icon Cool), ddng gdi sdn phlm(Portabte-Smart-lnstall-Maker-V5.D4), cde bdo d o kit qud dgng bdn Report tudng minh trdn Excel, Word.
# # # # # KHOA H Q C - C O N G N G H ^
5. Md ta chuong trinh
C h u a n g trinh tinh todn m i t mdt u n g s u i t d u y e xay d y n g trdn c a s d 10 Modul vd form vdi khodng 15 trang md ngudn (code) vd c a s d d u ligu, dung l u y n g thiet ke chuang trlnh khodng 1 MB. flie. Exe chgy trdn mdy tinh cd d u hlnh: HDD trdng tdi t h i l u 10MB vd RAM 515 MB, edc logi CHIP vdi bO vi x d li thdng t h u d n g . Mgc tidu cua c h u a n g trinh Id hgn e h l tdi da phuang thue nh^p edc tham sd thu edng t d ngoai, tdng tinh x u l t vd nh§p sd lidu vd k i t qud t u hinh t h d c lien k i t file vdi edc p h i n m i m Excel, Midas v.v..., t y ddng hda hodn toan thu tge ldp, t h d d l xde djnh tham sd, t y dOng hda hodn todn vide tra edu cde bdng b i l u , xuat k i t qud, phan t r y giOp (Help) cd trinh bdy c a s d ly t h u y l t djnh dgng PDF (xem hlnh 6).
cd md dun ddn hdi E = 197000 Mpa, e u d n g dO gidi hgn chju keo f^^ = 1860 Mpa; tao edp 7 s y i . mdi syi cd d u d n g kinh D^^ = 15,2mm. tgi gida nhjp d i m c6 tdng dign tich bd cap Id A^, = 2528.89 m m ^ dd Idch tam so v d i trye trung hda e = 1530,45 mm, gde chuyin h u d n g cap tgi giua nhip a = 0,0, dO I m mdi trudng bao quanh d i m la 8 0 % , md men gida nhjp do tdi trpng ban than gay ra Id 3000kNm, thdi gian t u lue edng cdp den luc d t edp (truyen lye) Id 4 ngdy. Hdy tinh m i t mdt u n g s u i t trong 1 bd edp.
Ket qua tinh todn cac logi m i t mdt u n g s u i t trong cdp t h i hign d cae giao didn d u d i ddy (xem hinh 7 • hlnh 12) d mdu trang de nhgp cde tham sd t u ngodi, d mdu xam Id ket qua tinh toan:
B3:sriaF^(y:i^f7^:n
Hinh 6: Giao di$n chuong trlnh tinh toin mit mit Ong suit truifc dim T
Trong ehuang trinh, tdc gia da xdy d y n g r i t nhieu cdng eg tidn Ich b l n g do hpa, giai thich rd rdng v l thudt todn, s a dd tinh, ea s d d u ligu vd h u d n g d i n s u dung.
Ngudi diJng ed t h i tuy bien vigc truy x u l t c a s d d u ligu.
C h u a n g trinh t y ddng hda vigc x u l t k i t qua kiem todn ra file ExI, Txt vd dd thj bien thien cac tham sd. Phan h i l n thj dang Menu bar. Menu tree va cua sd dd hpa phong phij, sinh dOng.
6. Thidu tfnh todn
Bdi todn: D i m T BTCT d n g s u i t t r u d e thi cdng theo edng nghO keo sau, dinh bdm hodn todn, cd c h i l u dai nhjp tinh todn Id 34,0m, dign tieh mat eat ngang A=
1061833,333 mm*, md men qudn tinh theo trgc x ddi vdi trgc tnjng hda I = 34768397685.592 m m \ be tong d md dun ddn hdi E^ = 30000 Mpa, cdp d y d n g lye
-AM MM MH ON> autr (M Mitan
^^ET
Hinh 7: Mat mit Ong suit do co ngdt
YlNM K A T H A T Ourt E u A t C D 6 0 NO&tVHUtrNO PHAT C X N O ftW)
no!»«, b«a <vtfw> l A CJH (f4
3DC~^3IC nac
Hlnh 8: Mat mit Ong suit do ma sit
Hinh 9: Mit mit Ong suit do tO biin
KHOA HQC-CQNG N G H $ # # # # #
Bang 5: Bdng so sanh k i t qua tinh todn:
Hinh 10: Mit mit Ong suit do co ngin din hdi
Hinh 11: Mit mit Ong suit do tw chOng cip Tdng m i t mdt d n g s u i t trong cdp se Id: 211,1837 Mpa.
GBCE QDCE
E
gsaiL—]n...irr:nHlnh 12: Ting mit mit ung suit tmng bd cip So sSnh vdi l<4t quS tinh tain thu c6ng vi dc bang tinh khSc ta c6 bSng s6 li^u sau (xem Bing 5):
T.KlTtluan
C h i r o n g trinh tinh todn m^t mcit irng suat trong d i m BTCT nSm trong c h u o n g trinh "KT2012" la san p h i m da d i r p c hOI d6ng l(hoa hoc Vi^n ky thu^t c o n g trinh iic bi$t nghl$m thu vi ddnh gid cao, i i bdo cdo Oinfc ddnh gid cao trong phlSn bdo cdo "HOI nghi sdng tao khoa hpc iSn thCr 33". P h i n m i m d d p Crng ducrc cde ydu cdu cua mOt sdn p h l m tin hoc hodn thi^n, c6 gid trt i>ng dgng cao, c6 giao di§n thdn thi^n, phu h<7p
C^c lo^i mk mdt dng suit
h^kmittOctliin A/p^ : mat mSt do ma sdt;
A/p^ : mit mdt do thiit bj neo;
A/p£s • "i^t fTidt do CO ngSn din h6i;
Mit mit iheo thdi gian
^fpSR '• i^^t rn^t d° ^ ri9^'i
^fpCR '• ^^^ i^^t <^<> to biSn cua BT
^fpR '• m^t mdt do ddo th6p;
Ting c$ng:
Blng chirang
trtnh
77.839 30.542
34.754 12.543 133.344 25,000 45 337
63.007 211.183
Ilillll l
77.839 30,542
34.754 12.543 133.344 25.000 45 337 63 007 211.193
Ctienh 1 ^
0.000 0,000
0.000 0,000 0.000 0.000 0.000
0.000 0.000 vdi sinh vidn vd k^ s u trong Idm do dn mdn hpc. dd an tdt nghidp vd edc d y dn t h i l t k l d u . Ddc bidt trong khi xdy dyng p h i n m i m , tde gid dd tdng h y p vd cg t h i hda todn bO nOi dung ly t h u y l t k i l m todn theo 22TCN 272-05. Tdi lidu ndy ed the phgc vg eho edng tde gidng dgy, nghien c u u vd dng dgng rpng rai cho mpi dan vj, cd nhan •
T A I LIEU THAM K H A O
1. C l u BTCT trdn dudng d td- Tdp I, II, Ld Dinh Tdm - NXB Xdy dyng,2006.
2.Tidu chuln ngdnh 22TCN272-05, NXB GTVT, 2009.
3. Xdy dyng phin m i m kilm todn d u BTCT ftieo tidu chuan 22TCN 272-05, Phgm Vdn Thoan, £>l tdi nghidn cdu khoa hpc, ndm 2012.
4. Barker R. M., Puckett J. A Design of highway bridg- es. American: John Wiley & Son, 1997,1169 p.
5. rionoB, B.M. ropoacKMe TpaHcnopTHuecoopyxBHin/
B.M. nonoa. - M.: iWlAflM, 2007.-352 c.
