风载下塔架结构的可靠度分析

高险峰马人乐(200092)(CollegeofCivilEngineering,TongjiUniversity,Shanghai),,,,,Ditlevsen,ABSTRACTAnalyzethereliabilityoflargetower2trussunderwindload.Basedonfinitemethodanddifferentpost2failurepropertyofmembers,seekthemajorfailurepathinthemoredangerouspartoftower2trusssystemandformthefailurefunction,thensolveoutthesystemreliabilitybyDitlevsentechnique.Finally,analyzethereliabilityofaTVtowerbycomputerprogramme.KEYWORDSTower2trussstructureReliability,,,,,,,,,,,,,(),,,,,,,,,Ditlevsen:;;,;:2,,1,:Zi=Ri(Ci,Ai)-Si(A1,,,An;Q1,,,Q3l;E1,,,En)(1)Zi);Ri);Si);Ci);Ai);Qj)(j=1,2,,,3l);Ei);n);l)Ri,,Si:)32)184200112Vol118No14Dec.2001SPECIALSTRUCTURESNo142001Si=E3li=1bijQj(2)bij)Ai(2)(1),:Zi=CyiAi-sign(Si)E3li=1bijQj(3),Cyi,sign(#)(#),,,:S(m)i(r1,r2,,,rm-1)=r3li=1b(m)ijQ(m)j=r3li=1b(m)ijQj-a(m)ir1Rr1-a(m)ir2Rr2-,-a(m)irp-1Rrm-1(4),Rr1,,,Rrm-1(m-1);a(m)ij:Z(m)i(r1,r2,,,rm-1)=CyiAi-S(m)i(r1,r2,,,rm-1)(5)(a)()(b)()(c)()11,(4),,(11c),,:yi0=clisinPxli(6),cl,c=01001,:yi=cli1-AisinPxli(7),Ai=Rri(P2EI/l2i)=R2iP2E(6)(7)[1]:$i=RriliUiEAi(8),$i;Ui=11+c2K2i(2-Ai)4(1-Ai)2(8),Rri(3)(5)JC[2],m,(n-m)K(n-m)|K(n-m)|=0(9),mDitlevsen[3],m,P(F1)+maxrmi=2P(Fi)-ri-1j=1P(FiFj),0[Pf[rmi=1P(Fi)-rmi=2maxjiP(FiFj)(10),Pf;P(Fi)i;P(FiFj)FiFj(2):23168m,4)33)No142001SPSTSPECIALSTRUCTURESNo142001111211271212Z1=-119Q1-1112Q2-2114Q3-3016Q4-3413Q5-3611Q6-3810Q7-4017Q8+312R(1)+016R(2)+S9175e-42121127123Z2=813Q1+2519Q2+4513Q3+6219Q4+7010Q5+7315Q6+7710Q7+8213Q8-513R(1)-316R(2)-S710e-43321325326Z3=-312Q1-1311Q2-2414Q3-3416Q4-3817Q5-4017Q6-4217Q7-4518Q8+610R(1)+318R(2)+S1155e-34321325327Z4=-016Q1-1010Q2-2419Q3-3815Q4-4319Q5-4616Q6-4913Q7-5314Q8+517R(1)+714R(2)+S1163e-35421325326327Z5=018Q1-415Q2-1417Q3-2411Q4-2718Q5-2916Q6-3115Q7-3413Q8+312R(1)+518R(2)-4124R(3)+S2125e-46421325326323Z6=315Q1+2416Q2+5416Q3+8119Q4+9219Q5+9813Q6+10317Q7+11210Q8-710R(1)-410R(2)-410R(3)-S315e-47521523527Z7=-019Q2-2117Q3-4016Q4-4812Q5-5119Q6-5517Q7-6114Q8+314R(1)+214R(2)+S510e-487217237297210Z8=118Q2+2617Q3+5112Q4+6110Q5+6518Q6+7017Q7+7810Q8-312R(1)-511R(2)-117R(3)-S2190e-397218238298210Z9=014Q2+2515Q3+5210Q4+6217Q5+6810Q6+7313Q7+8113Q8-315R(1)-512R(2)-219R(3)-S2148e-3101721172517261723Z10=2817Q4+7315Q5+9518Q6+11814Q7+15217Q8-718R(1)-515R(2)-515R(3)-S2175e-4:x-y,x(3),y(4);R(i)i;S(+S,-S);R(i)S45,,,,190N/mm2,:X0=0135N/m2,CVX0=0115;Ri=215N/mm2,CVRi=01106,1(10-4):1,(10):019922[Pr[019957,Monte2Carlo,40(1),1000,7,:Pf=0199311,n,m,Cm+1n,,,Cm+1n,21,,,,,)34)SPST20014SPECIALSTRUCTURESNo142001342,,2,,31,,,[1],U1Peil11,1989[2]11,1990[3]OveDitlevsen.NarrowReliabilityBoundsforStructuralSystems.J.STRUCT.MECH,1979,7(4),453-472)35)No142001SPSTSPECIALSTRUCTURESNo142001