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GB_T51273-2018 石油化工钢制设备抗震鉴定标准-英文版.pdfVerticalvesselssupportedbylegs
1 Verticalvesselssupportedbylegs
6.1Generalrequirements
GB/T 18002-2011 中密度纤维板生产线验收通则5.2Earthquakeeffectandseismicchecking
6.2.1The calculation of earthquake action effect and seismic checking of vertical vessels supportedby legs shall be carried out accordingtothe requirements of current national standard GB/T50761 StandardforSeismicDesignofPetrochemicalSteelEquipments. 6.2.2The allowable stress for seismic appraisal of vertical vessels supported by legs shall meet the
requirement of Article 4.0.2
63Seismicmeasures
Verticalvesselssupportedbylugs
General requirement
7.2Earthquake effect and seismic checking
7.2.1The calculation of earthquake action effect and seismic checking of vertical vessels supported by lugs shall be carried out according to the requirements of the current national standard GB/T 50761 StandardforSeismicDesignofPetrochemicalSteelEquipments. 7.2.2The allowable stress for seismic appraisal of vertical vessels supported by lugs shall meet the requirementofArticle4.0.2
3Seismic measures
et the requirements, repair welding shall be carried out and the welds shall be subjected to n structive test.
7.3.2Where the strength of lugs can notmeet the requirements,the lugs shall be reinforced.
Where the strength of lugs can not meet the requirements,the lugs shall be reinforced. 3 Where the local stress intensity of the cylinder at points where the cylinder join the lugs can et the requirements,pad plate shall be provided for purpose of reinforcing,or othermeasures shall en， 4For unfixed vertical vessels supported by lugs,measures shall be taken to restrict movement.
Verticalvesselssupportedbyskirts
Verticalvesselssupportedbyskirts
I General requireme
8.1.5The seismic appraisal of vertical vessels supported by skirts shall involve: 1 Strength checking for connection between skirt and shell; 2Checking for anchor bolt chair. 8.1.6The earthquake action on vertical vessels supported by skirts shall be cald
1Strength checkingfor connectionbetweenskirtandshell; 2Checking for anchorbolt chair. 8.1.6The earthquake action on vertical vessels supported by skirts shall be calculated according to the equirements ofthecurrentnational standardGB/T50761Standard forSeismicDesignofPetrochemical SteelEquipments.
8.2Earthquake effectand seismic checking
Me = ZFr(h; ha)
Figure 8.2.1Diagram of earthquak action on vertical vessels supported by skirts
2. A. Zw=0.55D.oe =0.7元D。0
M,calculatedmomentofrectangularplate(N·mm); Mxmoment of rectangular plate with respect to.x axis(N·mm); M.momentofrectangularplatewithrespecttoyaxis(N·mm);
Cmoment coefficient of rectangular plate with respect to axis, which is taken according to Table8.2.8; Cymoment coefficient of rectangular plate with respect to y axis, which is taken according to Table8.2.8; (maximum distance between inner sides of two adiacent ribs(mm).
Table 8.2.8Moment coefficients C.and C.of rectangular plate
Where: lsdistancebetween innersides ofribs(mm); ddiameterofanchorbolt hole in coverplate(mm); .—thickness of cover plate(mm) ; [olmaterial allowable stress of coverplate(MPa), 8.2.11 The stress of partitioned cover plate with wear plate may be calculated according to thd
following formula:
l—width of wear plate(mm); ddiameter of anchorbolt hole inwearplate(mm); 0,thickness of wear plate(mm). 8.2.12 The stress of ring cover plate without a wear plate may be calculated accordir following formula:
8.3Seismicmeasure
8.3Seismicmeasures
Sphericaltankssupportedbycolumns
Sphericaltankssupportedbycolumns
9. Generalrequirements
9.2Earthquakeeffectandseismicchecking
.1The gravity load applied on each support column of the spherical tank may be calcula cording to thefollowing formula:
Gegravity loadapplied on each supportcolumn when sphericaltank is underoperatingcondition(N); meequivalent mass of spherical tank under operating condition(kg), which is calculated according to the relevant requirements of the current national standard GB/T 50761 Standard for Seismic DesignofPetrochemical SteelEquipments; nquantity of support columns. 9.2.2The maximum bending moment caused by horizontal earthquake action and horizontal wind force may be calculated according to the following formulas :
Mmax = FmaxL Fmx=F.±0. 25Fw
iserial number of support columns within the range of 0°to 180°,as shown in Figure 9.2.4 Fiare 9.2 6.2
following requirements:
followingrequirements:
1When any two neighboring support columns are connected with a tie rod, the vertical load applied by thetie rodonthesupport columnmaybe calculated accordingtofollowingformula:
ZF max Sin0,
2when a tie rod is connected between alternate support columns,the vertical load applied by the tierod on thesupport column maybecalculatedaccordingtofollowingformula:
7 The maximum vertical loads on a support column may be calculated according to follow
Note..=M../R..=.../R
.9The membrane stress along equator line of the spherical shell under operating condition may culated accordingtofollowingformula:
M。totalbendingmomentonasupportcolumnunderoperating condition(N·mm) .13The stabilityof a support columnunderoperating conditionmay bedetermined according lowingformulas:
Note : The intermediate values are calculated by linear interpolation method
ctional forcebetween the base plate of support column and the foundationmay be
calculatedaccordingtofollowingformula
(P,)m) cos3 4FT ≤0. 9Rel. id
followingrequirements
GB/T 36654-2018 76GHz车辆无线电设备射频指标技术要求及测试方法.19The shear stress in connection welds between support columns and spherical shell (Fig .19)maybecalculated accordingtofollowingformulas:
L. 41LS ≤ 0. 58Rad
l0Vertical cylindricalstoragetanks
i0Vertical cylindrical storagetanks
10.1Generalrequirements
following formula:
io.2.9Inthecaseoftankscontainingflammableortoxicliquid,forfloatingrooftankanddomeroof tank,thedistance from the liquid level to the top of the tank shell shall begreater than the sloshing height; for the internal floating roof tank,the distance from the liquid level to the lower edge of the overflowdrain on thetank shell shall begreaterthan the sloshing height.
Q/HNS 0002 S-2014 华宁那山生物生态产业发展有限公司 大麦苗粉（麦绿素）10o.3.1If the checking shows that the first shell course can not meet the requirements, additional reinforcement pads shall be provided. Specifically,the reinforcement pads may be directly welded to or boltedtothefirst shell course. 10.3.2If thechecking shows that a tank's capabilityagainst overturning can notmeet therequirements hetank shallbe fixed to the foundation with anchorbolts. 10.3.3For the tank whose walls are difficult to reinforce, and the tank where the sloshing height exceeds the distance from the liquid level to the top of the tank shell or the distance from the liquid level co the lower edge of the overflow drain on the tank shell,the liquid level may be reduced according to the results of seismic checking.
1l.1Generalrequirements