NGHIEN CUfU-TRAO D(!)l 3D /^J > % , ) i ^ NGHIEN CU'U DONG LU'C HOC CONG TRUC PHUC VU LAO LAP DAM CAU SUPER-T LAP DAT TREN XA MU TRU CAU TRONG TRJONG HOP NANG HANG KHONG CO DO CHUNG CAP RESEACH DYNAMIC OF GANTRY CRANE ON THE CAP OF BRIDGE PIER TO SERVE INSTALLATION SUPER-T BEAMS IN CASE LIFTING WITHOUTH SLACK CABLE PGSJS Nguyen Van Vinh, ThS, NCS Biii Thanh Danh, ThS Nguyln Thuy Chi Bd mon May Xay dung- Xep do, Trudng Dai hgc Giao thdng Van tai TOM TAT Bdi bdo trinh bdy tdm tdt cdc kit qud nghien cuu dgng luc hgc (DLH) cong true lap dat tai xd mU tru cdu, phuc VH lao lap ddm cdu SUPER-T, truong hop ndng hdng khdng cd chung cdp Tic nhiing kit qud nghien cicu, cdc tdc gid da xdc dinh dugc gid tri cung nhu qui lugt thay doi cua dao dgng kit cdu thep (KCT) tdng trin, luc cdng cdp cong true ldm viec Ddng thai, cdc tdc gid ciing da dgc thuc nghiem nham kiim chung cdc kit qud tinh todn bdng ly thuyet Tic nhimg kit qud nghien cuu thu dugc ndy, cdc tdc gid dd di xudt cdc gidi phdp ky thuat di ndng cao hiiu qud khai thdc thiit bi ndy Tir khda: Cdng true, dgng luc hgc, ddm Super-T ABSTRACT The paper presents briefly research results of dynamics of the gantry crane on the cap of bridge pier to serve installation of SUPER-T beams without slack cable The authors determined the values of the oscillation of upstair steel structure, force of cable, and also perform experimental measurement to compare with theoretical results On the basic of these results, the authors will propose technical solutions to improve the operation efficiency of this equipment Keywords: Gantry crane, dynamics reseach SUPER-T beam ISSN 0866 - 7056 TAP CHf CO KHf VIET NAM, Sd nam 2015 wTvw.co Vietnam, cl NGHIEN CUfU-TRAO061 Nguygn ly lam viec cua cdng true nhu sau: Cflng true di chuyin ngoai cdng xon ciia dim da ray (08), lip tren xa mu tru ciu, hai cum mdc cau cua tdi nang hang (03) d§ nang philn dim ciu (04) hi xe dtd chd dim dudi m^t dit dua len cao, di chuyen vao phia va lan lugt dat cac philn dim vao cac vj tri gdi eiu tren moi tru ciu Sau lao het toan bd cac phign dim cua mdt nhip, dimg can cau de nhac toan bd cdng true xudng dudi dat va di chuyen toan bg thilt bi sang mdt nhip khac de tiep tuc lao lip cac phien dam eiia nhip dd l.DATVANDE Cong true lap dat tren xa mu phuc vu lao lap dam cau Super-T, la mgt nhirng thiet hi thi cdng chuyen diing nganh Xay dung eau Vi vay, viee nghien cuu tinh toan va thiet ke Cling cd nhirng dac diem rieng Ket cau thep cdng true thudng eo cau tao dang dan, khau dg Idn Tren cdng true cd bd tri hai cum tdi nang ha, mdi cum tdi nang dugc 40 tan Khi lam viec eong true thudng xuyen nang va hang, vi vay, ludn xuat hien cac tai trgng ddng tac dung len ket cau ciia cdng true Do dd, viec nghien ciiu qui luat bien thien eiing nhu cac gia tri cua tai trgng 2.2 XSy dung mo hinh ddng lure hgc cua cdng ddng, sir dao dgng ciia KCT dan chinh phat sinh true nang h^ng khdng c6 d6 chiing cSp qua trinh nang hang la rat cin thilt Kit qua nghien ciiu thu dugc se giup eho eae ky su, a Cdc gid thiet tinh todn can bg quan ly de dugc cac giai phap ky thuat thiet ke va su dung hgrp ly thilt hi - Khi bg may nang lam viec thi bd may di chuyen diing yen Bai bao nay, gidi thieu cac kit qua thu dugc cae tae gia tien hanh nghien ciiu - Hang dang treo khdng gian, ngudi ly thuyet va thue nghiem qua trinh nang hang lai dieu khien dgng ca de nang hang di len DO khdng CO chiing cap Ndi dung chi tiet chung chiing cap ^ toi se gidi thieu d phin tilp theo - Chua xet tdi giam chan cua bg may nang, hang va cua ket cau thep cdng true NQI DUNG 2.1 Doi t u ^ g nghien cihi - Hai bd may nang hang nhu nhau, - Dii tugng nghien cihi la eing true phuc vy lao lap dam cau Super-T eo ciu tao tdng thi dugc trinh bay tren hinh '^"^ '^^^^ ^^"^ thdi ' *^^"^ ^^^ "^^n ^^ hudng cua tai trgng gid 11 I'a-'M^L-m^l/^r.^^M^iM^f.T^i^iyr.i^Nr::^ / Dan chinh Cum puly miic cdu: Cym lai ndng-ha hang 4.Ddm Super-T: Lan Can Cum chan cong Iruc; BQ mdy di chuyen, Dam da ray iren xa mu: Cau Ihang: 10 Tru cau Hinh ! Tdng the cdng true Idp dgt tren xd mu - Dam BTCT chuyin ddng di len theo phuong thing diing hai dilm lien kit cap vdi dam la A va B, cd di chuyin diu (dim khong bi xoay mat phing XOY) - Do anh hudng cua trgng lugng ket cau thep va trgng lugng cua dim BTCT nen KCT tang tren bi vdng xudng mdt vong tinh ban dau y ISSN 0866 - 7056 TAP CHf CO KHf VIET NAM, Sd nam 2015 ww^v.cokhivietnam.vn NGHIEN CIJfU-TRA0e6i - He ehi dao dgng theo phuang diing He dao ddng diem xuat phat ban dau nang hang tir vi tri can bing tinh (khdi lugng m^ co y,) b) Xdy dfptg mo hinh dpng lire hgc DLH c) Thiet lap phirang trinh chuyen dpng Tir mo hinh DLH tren hinh dat vao he mdt he true tga tuyet ddi XOY, sii dung cae ly thuyet ve DLH trinh bay tai lieu [1], chiing ta cd the viet dugc cac PTCD nhu sau: Phuang trinh Lagrange loai II de viet PTCD CO dang: i ^ ( ^ ) _ I , i i _ ^ = e (/=i*4) (1) Hinh Md hinh dgng luc hgc cdng true lap ddt * a'q, tren xd mU try cdu ^? d'q, ^1 -Dong nang cua he xac dinh nhu sau: Cac ky hieu: m^ - Khdi lugng cua hang nang (dam BTCT) va cum puluy mdc cau, kg; m^- Khdi lugng quy dan eua ket cau thep edng tnic va bd may nang h^ hang ve diem giua ciia KCT tang tren, kg; 9|, 9^ - Md men quan tinh quy dan cua roto dgng CO dien va khdp ndi, kgm^; M ( ^1) M( ^4 ) - Dudng dae tinh ngoai cua eae ddng CO thugc bd may nang hang; S, - Do cimg cua mdt nhanh cap hang, N/m; S^ Do Cling eua chan cdng true, N/m K, - He sd dap tit dao dgng eua cap hang, Ns/m; D - Dudng kinh tang cudn cap, m i, - Ty sd truyen cua hop giam tdc thudc bg may nang hang ij - Sd nhanh cap treo puly di ddng (bgi suat cap) q,, q_, - Chuyen vi gdc ciia ddng co, rad; q^ - Chuyen vi thang cua hang, m q^ - Chuyin vi (dao ddng) cua khdi lugng mj, m; q - chuyen vi gdc cua cudn cap, rad Dat md hinh DLH tren vao he tga tuyet ddi XOY ?• = 2^11> 2'"'^'' +2'"'^' "^^'^'''' '" Vdi V/ = j : + y , (2) - The nang eua he: The nang cua he bao gdm the nang tich lijy 16 xo S^, S^ va the nang vi tri ciia khdi lugng hang m^ va cua khfli lugng ket eau thep m^ U = U , + U2 +U3 U,: The nang bien dang cua cap hang va the nang vj tri cua hang nang U,: The nang tich luy Id xo S^ va the nang vi tri eiia khdi lugng m^ U,: The nang bien dang cua ket cau thep tang tren U,=-S,Ml^-SAllm,gq, '''44^'''''^^"''^'''T'"'*'^=4m'''''^'"'?^'''^' ISSN 0866 - 7056 TAP CHI CO KHf VI$T NAM, Sd nam 2015 WTvw.cokhivietnam.vn NGHIEN CUfU - TRAO D I Voi each dat nhu tren, chung ta co thg viet he phuong trinh chuyen ddng nhu sau: voi bien dang tong A = Aj + A, + A^ M(q,y''^-ER'A-DRA (6) (7)2 VaiA,=^;A3=n;A,=^ Cuoi ciing chiing ta co ham the nang; EC+DC 12= (7) -D.U - Ham hao tan: ^.lf,,ki^ (8) +^K,k,^ S^ + S,' + (2+^;^!?, + % Sau thay th6 ta co; il> = -K,,l(,Rq,-q, + 'q,f+-K,,l{R'q,^q,+ 'q,f (4) ~ _± - Cac lire suy rong xac dinh nhu sau: e, =M(,?,);Qj = 0;Q3 = ; e = A / ( ? , ) = (Rq,-q^+q^) nen A = (Rq^-q^+q^) (9) (5) Phuong trinh chuygn dong co thg vilt lai duoi dang: D + P + N^ voi i = 1^ mtA Miq,y!^!^-ERB~DRB\ Bien d6i ti8p chiing ta co hS phuong ^'^h chuyen dong: - Luc cang mot nhanh cap: ^ Ben trai: 'V,=^+'!*^,(«?,-ft+