Nghien CIFU qua trinh lan truyen song no va lu'O'ng tac vai cdng trinh co ket cau cong trinh dang cirng trong moi tru'ang san ho
Study on the blast wave propagation and interaction with works having hard structure in coral medium
Ngay nhan bai: 22/10/2014 Ngay siia bai: 15/12/2014 Ngay chap nhan dang: 10/1/2015 TOM TAT:
Bai bao trinh bay philcrng phap thi^c nghiem de xac dinh q u i trinh tilcTng tac gifla cong trinh co ket cau dang cflng n ^ trong moi trfldng san ho khi song no Ian truyen din va tflong tac vcti cong trinh, n h i m muc dich phvic vu cho viec Ifla chpn dang ket cau cong trinh sfl dung trfen cac dao, tfl do rut ra cac ket Iuan lam cd scr cho viec ap dung trong thflc te.
TH khoa: Tai trpng no, lan truyen song nd, moi trflcfng san h6.
ABSTRACT
The article presents the erperimental method to determine the interaction process between works having hard structure in coral medium and the blast wave that propagates and interacts with works. This is aimed at purpose of selection of work structure used on islands, then drawing the conclusion as the basis to apply in reality.
Keywords: Load explosives, explosive wave propagation, coral environment
Va Dinh Lpi Nguyen Hiiu The Di dpng: 0904959555
Email: [email protected].\-n
I.OATVANBe
Hien nay 6 nu'dc ta tren cac dao thuoc Quan dao TrUdng Sa nhu cau xay ciiing cac cong trinii phuc vu an ninh, quoc phong thucmg gap m o t so khd khan khi lua chon dang ket cau cong trinh hop ly nham myc dfch nang cao sflc khang lUc cho cong trinh, van dam bao gia thanh re, de t h i cong. Chinh vi vay viec nghien cflu thuc nghiem xac ^ n h khd nang chju life cua ket cau dang cflng trong moi trUOng san ho la m o t n h u cau cap bach va cd y nghTa thuc tien rat Ifln. Do vay bai bao da trinh bay ket qua t h i nghiem tal cac dao thuoc quan dao TrUdng Sa. Tfl d o rut ra m p t sd ket luan va kien nghi khi tnen khai cac cong trinh nay tren cac dao nay.
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V u D i n h Ldi, Nguyen H u l l T h e
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Mdi t r u d n g g o m m d t Idp hay nhieu I c ^ dat tren nen ban khdng gian dcin hoi vd han.
Tren bien cua m d hinh tfnh cho phep sdng nd d l qua, tal day khdng cd hien t u p n g phdn xa song tai tat ca cac diem nSm tren bien.
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c) Datric do b i l n dang PlJ\-5 (hang TML, Nhat c h i tao)
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Cdng trinh cd k i t cau dang cflng hlnh trdn cd kha nang chju tdi trpng do sdng nd lan truyen den cao hPn rat nhl4u lan so vdi ket cdu cdng trinh dang vudng, do vay khi t i n h todn, thiet ke va lua chon dang cdng trinh dat trong mdl san hd n h i i dudng dng ky thudt, kho chfla hang, dfldng ca ddng ta n€n sfl dung k i t dang cflng cd tiet diin dang hinh trdn se ddm bdo ndng cao sflc khdng lUc cho cdng trinh.
TAILIEUTHAMKHAO
I I ] . Hoang Xuan Lifong, Nguyen Thii Chung, L^ H n ,
"Nghien cilu thilc nghiem xac innh tinh chat ca ly ciia san ho va
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nen san N^'TCKhna hoc va ky ttiuat Hoc vien 19 thuat Quan SU.
so 145 (2005), tr. 27-36.
[21. Vu Oinh Led, T m y e n sdng nd va ^ 1 tronq nd", Tai TIHI diJng d w cao hoc nganh cong trinh, I k K vien 1 ^ ttiuat Quan sU.
P I Nguyen Tri Ta, "Nghien o i u su tuong tac giiia ket cau c o n g s u v a i r m t n m g dudl tac dung d i a t a i ttgng bom i b n d B t d ^ bnh phi tuyen ciia mdi t n A j g * , Luan an Twn s 1 ^ thuaK2006}, Hoc n e n 1 ^ ttiuat Q u i n su.
[4t. Henrych J l i t e Dynamic of E t p h s o n and Its Use, Chapter 5. Elsevier Nevr York, 1979.
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P h J l Thesis. f W u e University, 1981.
[6]. T M 5 ^ 5 - 1 . IHwdamenlal itf pnitectne design ^ c o n v e n t i o n a i w u p o i ^ US Army Engineer^^bt»ways Eqtenment SlatKHi,Vicksbu[g;1%4.
[7). AUTODYN Theory Manual, i«visian 3.0, Cmtury Dynamics, San flamon, Cabfomia. 1997.
[S]. S h ^ n s h N P Sod DynanHcs, Chapter 4. McGraw-Hil:
New Ybric 1981
[ 9 | . Pande GN, Senkiewicz X Sod MechanicslTransenr and CydK Loads, Chapter 2. Wiley: Chkhester, 1982.
110] Fredliaid DG, Rahardjo H. Soil Medianics for
UnsatuiaRd Soils, Chapters 9 and 1 1 W9qp: ( h k h e s t e t 1993- [11]. G)leRH. Underwater EiqAHions.PilncetralMvers(ty Press: Prmceton, HI. 1948.
[ 1 2 ] . Chen WF. Salad! GY. Sod Plasttdty Theory and l n q ) l e n ) e n t a i i o n . B s » i e r Amsterdam, 1965
[13]. Drudter OC Prager W. Sofl mechanks ixA piastk analyas or l i m i t design Quarterly o f ^ i p l i e d M a t t w m a t i c s 1952;
10:157-165
1141. AinOOYN Help (2013]. ANSYS WORBEHCH140.
115). AUIDDYH Theory M a n u ^ . Revision 4 1 , Centwy Dynamics, San Ramon. California. 2 0 0 1 .
Dmh chmh:
TgpchfXaydMgs63phdthanhvaothang3nam2O15.Dos0xudtdt khau che ban nen CO sai sot ngi dung trotig phdn Tom tit; Tvtkhoa: Abstract; Keywords. Bai "Hieu qua sddung sgi thep trong viec cai thien kha nang khdng cdt cua ddm cao' cda cdc tdc gid: TS Nguyen Minh Long; ThS Trinh Ldm Minh Tien; ThS Tran Quoc Todn. 6 trang 106
Nay xin ^nh chinh lgi v^ npidungsau:
TCMTAT
Ngay nay. dam cao dflpc sfl dyng pho bien trong ket cau. Khac vdi dam thfldng (cdp goi la dam Bernoulli), dam cao c6 fli^ xfl cat dong vai tro chu dao, thfldng dan den Ideu pha hoai don nguy hiem kem theo do la kha n a r ^ hf^ thu nang Iflong kem cua cau kien. Bai bao nay gidi thieu phflcfng phap sfl dung soi thep cho viec cai thien flng xfl cua dam cao khi chiu tac dong cua Iflc cat, trong dd tap trung khao sat thflc nghiem anh hfldng cua hiun Iflong soi thep va tflOng tac gifla hifln Iflong soi thep vfli ham IflOng cot dai den flng sxi va kha nang khang c4t cua dam cao. Chfltd^ trinh thflc nghiem dflOc tien hanh dfla tren 12 mau dam cung kich thfldc c6 ham Ifldng sOi va cot dai thay doi. Ket qua cho thay sfl dung soi thep lam gia tang kha nang c i i u keo cua be tong trong vung nen xien tfl do lam tang kha nang khang nflt va khang c5t. giam be rong vet nflt va chuyen vi cua dam.
Tit khda: dam cao; s^ titepphan ton; hdm lUdngsOi; hdm ItiOngcotdai; khd nangkhdng cat
ABSTRACT
Several structural elements bdiave as deep beams; wall of bunkers, load-bearing walls in buildii^s, transfer girders and pile caps are typical examples. It is well-known that the behavior of long-span beams (BemouUi beams) is governed mainly by flexure that results in the bending stresses are h ^ compared to the shear stresses. However, for shorter ^lan beams, paiticulailv deep beams, due to their geometric proportions, the shear behavior plays a decisive role. This behavior type usually results in a catastrofic failure. This paper presents sted fibers as an alternative solution for the improvement of shear behavior and canadtv ofthe deep beams, in which, the p ^ e r deals with effect of fiber amount and interaction between fiber amount and sturuo ratio on shear behavior and a ^ c i t y of deep beams with steel fibers. The experimental program was carried out on twelve deeo beam-!
with varyii^ fiber amounts and stimip ratios. The test results show that the u s ^ e of steel fibers increases shear capacity rediir shear crack width and deflection ofthe beams.
Keywords: deep beam; sted fibers; sted fiber amount; stirrup ratio; shear capacity.
Tap chi Xay dUng, chdn thdnh xin ldi cdc tdc gid cua bdi viet vd Quy ban dgc.
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