NGHIEN cflu - TRAO DPi TiNH TOAN MO P H N G KlfiWI BEN HE T H N G CHAN COT THIET B! LOC BUI TTNH DIEN - NHA MAY NHIET DIEN VUNG ANG CONG S U A T 2X600 M W ANALYSIS AND SIMULATION OF SUPPORTING STRUCTURAL SYSTEM STRENGTH OF ELECTROSTATIC PRECIPITATOR VUNG ANG THERMAL POWER PLANT 2x600 MW NguySn Chi Sang, Ditong Van Long Vien Nghien ciiu Co khi, Bg Cong Thiiong TOM TAT Bdi todn tinh todn sdc ben cho cdc he thong ket cdu phdc tap ludn Id bdi todn kho, tieu ton nhieu thai gian vd cong sdc Vdi sU trd giup cua mdy tinh vd cdc phdn mem tinh todn chuyen dung nhd SAP 2000, Cosmos, StruCAD, KCW 2010, Autodesk Robot Structural Analysis (RSA) viec tinh todn cdc kit cdu phdc tap trd nen thugn tien hdn Tuy nhien, vdi cdc cong trinh ldn, phdn ldn cdc tinh todn ndy dUdc thuc hien bdi cdc cong ty hogc chuyen gia nUdc ngodi vdily hodchg Id nhd thdu chinh hodc hgco kinh nghiem cdc cong trinh tUangtU Bdi viet ndy gidi thieu ket qud tinh todn kiem ben he thdng ket cdu chdn cgt cua thiet bj Igc bui tinh dien (TB LBTD) Vien Nghien cdu Ca thUc hien vdi viec sd dung phdn mem RSA, ket qud tinh todn hodn todn tUOng dddng vdi ket qud tinh todn cua cong ty Kondor-Eco, Nga Tit khoa: Kiem ben ke't cdu, ket cdu thep, lien ket he gidng, phddng phdp phdn td hdu hgn ABSTRACT Strength calculation of complex structural systems is always difficult It spends a lot of time and effort However, with add of computers and specialized computing software such as SAP 2000, Cosmos, StruCAD, KCW 2010, RSA the calculation of complex structures conveniently becomes In addition, among great projects in Vietnam, most of the calculations are made by foreign companies or experts because they are contractors or have experience in similar works This article introduces the results of durability and stability calculation of supporting structural system of Electrostatic Precipitator made if National Research Institute of Engineering Mechanical using RSA software The calculated results an equivalent to the calculated results of the Kondor-Eco ISC based an Russia Keywords: Structural strength analysis, steel structure, bracing system, finite element method ^ TAP CHi CO KHl VIET NAM • S6 (Thang nam 2013) NGHIEN CUfU - TRAO DOI I.DATVANDE TB LBTD dflpc lap dat nhd mdy nhiet dien cdng suat to mdy 600 M W cd kich thudc bao 28.940 x 28.500 x 28.950 m m vd khdi Iflpng 1215,6 tan (hinhl) He thong chan cdt cd chflc ndng dd todn bp vo budng lpc, thiet bi cP budng lpc, cau thang, sdn thao tdc, bao dn, bien the cap ngudn cho cdc trfldng vd mdi che Cac loai tdi trpng tac ddng len he thdng chan cpt bao gdm: toan bd tai trpng cua thiet bi lpc bui, tdi trpng dpng ddt vd tdi trpng gid tai khu vflc nha mdy De dam bdo cho thiet bi lpc bui hoat dpng on djnh va an todn, he thong chan cdt dd phai dupc tinh todn du ben vd dn dinh cho trUdng hpp chiu tdi trpng bat lpi nhat - tai trpng td hpp cua tdi trpng thi€t hi, tdi trpng dpng dat vd tai trpng gid Theo dilu kien ky thudt cua du an, cdng ty Kondor-Eco da tien hdnh tinh todn kiem ben vd on dinh he chdn cdt vdi viec sfl dung phan mem ING+ 2008 vd Gen3dim Xuat phat tU muc tieu ldm chfl viec sfl dung phan mem cdng tdc tinh todn thiet ke ket cau phflc tap ciia TB LBTD cdng suat ldn, nhdm nghien cflu da tien hdnh thiet lap chflong trinh tinh todn md phdng kiem ben cho he thong chdn cpt vdi sU trp giup cua phan mem flng dung RSA, so sdnh ket qua tinh todn thu dUpc vdi ket qud tinh toan cua cdng ty Kondor-Eco cung mdt dieu kien tinh todn dau vao nhU nham muc dich kilm ehflng dp tin cay cua phflpng phdp tinh dupc thiet ldp Trong khudn kho bai bao chung tdi chl gidi thieu ket qud tinh todn Idem ben chdn c^t, kit qud tinh todn cac ndi dung cdn lai nhU he thdng gidng, bdn ma, bu ldng lien ket, bu ldng mdng dupc the hien thuyet minh tinh todn todn vdn trflc ldn vd phflc tap Phdn mem RSA cung cap mdt quy trinh lam viec nhanh chdng, hieu qua vd khd ndng tflpng tdc vdi phan mem Autodesk Revit Structure de md rdng qud trinh xdy dflng md hinh, xuat ban ve che tao dang file CAD, cdc thdng tin phuc vu cho cdng tac dfl todn vat tfl, lap dfl todn chi phi Phan mem cho phep rut ngan thdi gian cdng tdc thflc hien md phdng vd phdn tich todn dien cau true Hmh Hmh dnh Thie't bi loc but tinh diin - Vitng Ang Hmh Xdy dUng mo phong TB LBTD - Vang Ang I bdng RSA 2012 GIAI QUYET B A I T O A N 2.1 Xdy dUng chUPng trinh tinh todn md phdng 2.1.1 Doi tUOng tinh todn kiem ben Gidi thi^u v l Phan mem Autodesk Robot Structural Analysis Phan mem RSA Id phan m i m phan tich thilt kl ket cau chuyen nghiep, cung cap cdng cu md phdng tiln tien, cd khd nang phdn tich cdc cau Ddi tflpng tinh toan kilm ben trinh bdy bai \iet Id he thdng chdn cdt TB LBTD thiet ke cho Nhd mdy Nhi|t dien Vung Ang He thdng chdn cpt bao gdm 30 chdn cpt dupc lien ket vdi bdi cdc he gidng ngang, gidng cheo v.i lien' TAP CHi CO KHi V I £ T NAM V Sd (Thang [uini :i) 'v! NGHIEN CUfU-TRAO D O I ket vdi bang bu ldng hodc hen ket ban theo vi tri Trpng Iflpng cua he thdng chan cpt la 101,5 tan Kich thflde hinh hpe 01 chdn cdt Id 800x650x6250 mm, cd ket cau dang cpt ban to hpp Tren dinh cua mdi cpt cd thiet ke mdt he thdng gdi dd giup phan budng lpc cua thiet bi cd the trflpt tflpng ddi so vdi he thdng chdn cpt, vdi muc dich nham lam giam Iflc tac ddng anh hfldng cua dan nd nhiet budng gay ra, len he thdng chdn cdt qua dau cdt He thdng gdi dflpc chia lam loai: - Gdi cd dinh (01 gdi): dUpc dat tai dinh cdt vj tri sd 18; - Gdi di ddng hUdng (09 gdi) dUpc bd tri tai dinh cdt vi tri so: 3, 8,13,23,28,16,17,19,20; Hinh Xdy diing mo phong tdi ciia thiet bi lai cua TB LBTD Nguyen tac tinh toan: - Gdi di ddng hfldng (20 gdi) dflpc bd tri d cdc dinh cpt cdn lai 2.J.2 Thiet ke mo hinh hoa ket cdu thiet bi he bui tinh dien Viec thiet ke md hinh hda todn bp ket cau cua TB LBTD va he thdng chan cot dd dflpc thflc hien trflc tiep bang phan mem RSA2012 (hinh 2) 2.2 Tinh toan Idem ben kit cau he thong chan cpt 2.2.1 Dd lieu ddu vdo tinh todn: Tai trpng tdc ddng len he thdng chan cdt bao gom tai trpng tinh, tai trpng gid va tai trpng ddng dat - Tai trpng tinh: Bao gdm tai trpng cua todn bd cac bp phan cau cua thiet bi '*^l + Khdi Iflpng cua cdc ket cau khung v6 buong loc dflpc khai bdo qua trinh xdy dflng md hinh (hinh 3); + Khdi Iflpng cdc bp phdn thiet hi lai; he thdng dien cflc ldng, he thdng dien cflc phong, cac he thong go ru bui, trpng Iflpng bui chfla bunker, bao dn dflpc quy doi ve tdi trpng phan bd vd tai trpng tap trung theo tieu chuan EN1991 1-1-1:2002 (hinh 4) - Tai trpng gid: Tai trpng gid dUpc quy doi ve tai trpng phan bo, theo tieu chuan EN 1991 1-1-1:2002, tac ddng len cac be mat cua lpc bui dflpc the hien tren cdc hinh 5, Chpn he sd tin cay cua tdi trpng gii la Y|,=1,2 (tuong flng vdi nhd vd cdng trinh cd thdi gian sfl dung gid dinh Id 50 nam) Ap lUc gio tai khu vUc Vung Ang Id 155 kG/m' Gid tri tdi trpng gid tieu chuan dUpc xac dinh nhu sau: q^ = w_^-y^ = 155 • 1,2 = 186 kC/m' = 1,86 kN/m^ Hinh Xdy diing mo phong tdi trgng cua ke't cdu khung vo buong Igc TAP CHi CO KHi VIET NAM Sd (Thang nam 2013) NGHIEN CtfU TRAO eOl Structural, dp dung tieu chuan EN 1990:2002 T-~J,| r \/;\,?\ t la i ^ 2.2.2 Qud trinh tinh todn Sau hoan viec to hpp tdi trpng, qua trmh tinh todn dflpc thflc hien qua thao tdc cac lenh cua phan mem RSA2012 2.2.3 Ket qud tinh todn Hmh Tdi trgng gio theophUdngy 2.2.3.1 Xdc dinh vi tri chiu tdi trgng ldn nhdt Sau qua trinh tinh toan, phan mem cho phep truy xuat ket qua gid tri npi lUc va gia tri md men theo cac phUong tac dpng len tflng vi tri chdn cdt d dang bdng sd lieu, dd thi, bieu bien dang ket cau vd bieu dd flng suat ldn nhat Hinh Tdi trgng gio theo phUdng x Ket qua gid tri npi Iflc vd gid tri md men theo cac phflOng tdc ddng len tflng vi tri chdn cdt dflpc tap hpp vd thl hien tren hinh - Tdi trpng ddng dat: Theo quy dinh cua dU dn cap ddng dat dupc sfl dung bdi tinh la cap theo thang MSK-64, gia tdc nen thiet ke la 0,24 g Trong dd g = 9,8 m/s^ la gia tdc trpng trudng Chon he sd an loan tinh toan dnh hUdng cua ddng dat tdi he chan cpt ciia ESP la 1,25 Qud trinh tinh toan tai trpng dpng dat tdc ddng len he chdn cot dUpc thUc hi?n bdng phan mem RSA Hinh Bie'u ket qud gid tri ngi lUc vd mo men tai cdc vi tri chdn cot TU ket qud tinh todn bdng phan mem RSA, cd the xac dinh dflpc vi tri chan cdt sd 19 chiu tdc dpng tai trpng ldn nhat Ket qud tinh todn To hgip tai trpng: cua cdng ty Kondor Eco cung chi vi tri chiu tdc ddng tdi trpng ldn nhat la vi tri chdn cdt 19 Trong ThUc hien td hpp tai trpng: phan mem RSA bang so sdnh gia tri tai tai chan cpt 19 theo 2012 ho trp viec nhdp cdng thflc to hpp tdi trpng kit qua tinh toan bang phan mem RSA Narime ho^c bdng tay, hodc sfl dung cdng thflc td hpp tai thflc hien vdi ket qua tinh todn bdng phan mem trpng theo tieu chuan cua cdc quoc gia tflpng flng ING-h 2008 vd Gen3dim cdng ty Kondor Eco da dupc tich hpp san Viec td hpp tai trpng dflpc thflc hien Chlnh lech gid tri kit qud tinh toan sCr dyng tinh toan Id dung cdng cp to hpp tdi trpng tai vi tri chdn cdt sd 19 gifla hai phflong "^ tai trpng tich hpp sdn phdn mem Robot phdp xdp xi 9% TAP CHi c a KHi V I £ T NAM V Sd (Thang nam 2013) NGHIEN CtfU-TRAODOI ^ So sdnh tdi trgng tdc dgng tai vi tri chdn cgt so 19 Cpt so 19 Ket qua cua Narime Ket qua cua Kondor Eco Tai trpng tac dpng Tai tac dong Theo phflpng xF^, kN^ Theo phflpng yF kN' Theo phuong zF,, kN' 1801,5 -17,1 22,8 Tai Theo trpng to phuong hpp F kN' kN 1801,7 2.2.3.2 Kiem nghiem ben 1964,7 Theo phuong zF^, kN' Theo phuong yF, kN 150,5 65,5 Chenh lech gia tri tai Tai to td hop, % hpp F, kN 1971,5 ~9 h = 450mm Chieu cao mat cat ngang b= 450mm Chieu rpng mat cat ngang Tfl ket qua tinh todn cho thay gid tri tdi t^ = 25mm Chieu day ednh trpng tdc ddng len 30 chan cdt la khac Ve t = 25mm Chieu day bung nguyen tdc cd the thiet ke che tao chdn cot cd kich thflde du ben tflpng flng vdi tai trpng tac ddng cfla tflng vi tri Tuy nhien, de thuan tien cho cdng 2.2.3.2.2 Ket qud kiem nghiem ben tac che tao, ldp dat, kiem scat chat Iflpng cung nhu tham my cdng nghiep dfl an chpn phUPng Viec tinh todn kiem ben dflpc thflc hien an thiet ke che tao tat ca 30 chdn cdt cd cung ket theo tieu chuan EN 1993-1.l:2OO5/AC:2009, cau va kich thflde Vi vdy viec kiem nghiem ben Eurocode 3: Thiet ke ket cau thep Qud trinh tinh se dflpc thflc hien cho vi tri chan cdt chiu tac ddng todn thUc hien trUc tiep tren phan mem Ket qua tai trpng ldn nhat, neu dieu kien ben dflpc thda nhfl sau: man thi mac dinh 29 chan cpt cdn lai se thda man dieu kien ben - Kiem tra ben 2.2.3.2.1 Thong so cdu tqo chdn cot tai vi tri kiem Ket qua kiem tra K^luan D^ - Vl tri kiem tra: Chdn cdt sd 19 - Vdt heu che tao: thep SS400 - Thdng sd tiet dien mat cdt chdn cdt (hinh 8): |- -—J _ -ir- = 0flS4