savin1基设文件spcbd-spc-whpflq-st-0001 specification for living quarters structural design rev0

1、BASIC DESIGN OFBZ34-1 OILFIELDS DEVELOPMENT PROJECTJOB NO. 2013BD-005STRUCTUREPage 1 of 12COSIGN DISCIPLISIGNATUREDATE02013.10.29ISSUED FOR APPROVAL(0)2013.8.28ISSUED FOR REVIEWB2013.06.7ISSUED FOR COMMENTSA2013.06.7ISSUED FOR WORKINGREV.DATEDESCRIPTIONBYCH K.REV W.EXAM.APPR.CLIENTCNOOC Ltd.TianjinS

2、PECIFICATION FORLIVING QUARTERS STRUCTURAL DESIGN(CN-USP-BHB-BZ34-1)DESIGN CERTIF. NO .CNOOCResearch Institute A111008717 RICHTECH A231014242DOCUMENT NO.REV.BD-SPC-WHPF(LQ)-ST-00010CNOOC RIAPPROVEDSIGNATORYSIGNATUREDATEREVWEXAM.APPR.BASIC DESIGN OFBZ34-1 OILFIELDS DEVELOPMENT PROJECTBD-SPC-WHPF(LQ)-

3、ST-0001REV. 0CONTENTSSCOPE31.02.03.04.75.06.07.48.0REGULATIONS, STANDARDS CODES AND REFERENCE DOCUMENTS3National Regulations (P.R.C)3Standards/Codes3Regulations, Standards/Codes And Specification3DESIGN BASIC DATA3Location and G

4、eographic Data3Elevation Reference Point3Design Life4Design Environmental Criteria4Environmental Data4DESIGN PHILOSOPHY4General4Design Criteria4Computer Analysis5Member Size Selection5Joint Design5System of Units5Deflection5STRUCTURAL MODELS5General5Members6Joints6MATERIAL6Steel Properties6Steel Typ

5、e6STATIC ANALYSIS7General7Basic Load Cases7Load Combinations8Environmental Load Direction9SEISMIC ANALYSIS99.09.410.0INSTALLATION ANALYSIS9General9Loadout Analysis9Transportation Analysis10Lifting Analysis10APPURTENANCE DESIGN11Handrails, Walkways, And Stairways11Padeye Design11

6、Helideck Design11SPECIFICATION FOR LIVING QUARTERS STRUCTURAL DESIGNPage 2 of 12BASIC DESIGN OFBZ34-1 OILFIELDS DEVELOPMENT PROJECTBD-SPC- WHPF(LQ)-ST-0001REV. 01.0SCOPEThis specification defines minimum requirements for BZ34-1 WHPF living quarters (LQ). It will include the design basic data, design

7、 scope and design criteria. This specification will govern the basic design of structures.The basic design is defined as the calculating analysis, design and drafting of the structure. The analysis and design shall address the pre-service and in-service functional and environmental loading condition

8、s.2.0REGULATIONS, STANDARDS CODES AND REFERENCE DOCUMENTS2.1NATIONAL REGULATIONS (P.R.C)“Safety Rules for Offshore Fixed Platform (2000)”2.2STANDARDS/CODESThe following standards and codes shall be considered as parts of this specification:?AISCSpecification for Structural Steel Buildings Allowable

9、Design and Plastic Design,(2005)Stress?API RP 2ARecommendedPracticeforPlanning,Designing,andConstructing Fixed Offshore Platforms WSD 21st edition, 2007?AWS D1.1Structural Welding Code-Steel,(2010)?DNVDNV Rules for Classification of ships Part 6 Chapter 1 Jan.2012?Roarks Formulas for Stress and Stra

10、in, Seventh Edition2.3REGULATIONS, STANDARDS/CODES AND SPECIFICATIONIn case of conflict among different regulations, standards and codes, the national regulations should be satisfied first, then this specification and documents should govern the design if they contradict with standards/codes and oth

11、er specifications. Between the industry codes and specifications, API RP 2A-WSD will govern unless otherwise noted.3.0DESIGN BASIC DATA3.1LOCATION AND GEOGRAPHIC DATAThe Geographic location of BZ34-1 WHPF is as follows:3.2ELEVATION REFERENCE POINTAll levels are referenced to Chart Datum (C.D.) desig

12、nated as EL() 0.00m. Units are given in meter. All other elevations are relative to this level in structural calculation and design report.SPECIFICATION FOR LIVING QUARTERS STRUCTURAL DESIGNPage 3 of 12SitesEastingNorthingLongitudeLatitudeBZ34-1 WHPF454 672.74 218 0641192857.872380825.299BASIC DESIG

13、N OFBZ34-1 OILFIELDS DEVELOPMENT PROJECTBD-SPC- WHPF(LQ)-ST-0001REV. 03.3DESIGN LIFEThe design life is 25 years.3.4DESIGN ENVIRONMENTAL CRITERIA3.5ENVIRONMENTAL DATA3.5.1Water depthThe water depth for BZ34-1 WHPF is as follows: (Relative to C.D.).BZ34-1 WHPF19.7m3.5.2Wind velocityExtreme values for

14、BZ34-1 WHPF gas field development are showed in the following table.4.0DESIGN PHILOSOPHY4.1GENERALAnalysis shall demonstrate that all components of the structure have been adequately designed for design conditions and that all stresses are within allowable limits.Appropriate loads for all phases of

15、platform life shall be considered in the global design of the structural system and design of individual components.4.2DESIGN CRITERIA?Structural design shall be based on working stress design method.?Nominal yield strength shall be used in design. Mill certificate yield strengths shall not be used.

16、?A one-third (1/3) increase in allowable stresses shall be applied to load conditions that include loads from extreme environmental events.SPECIFICATION FOR LIVING QUARTERS STRUCTURAL DESIGNPage 4 of 12ElementsUnitReturn Period(yearind3-secm/s26.629.430.731.932.633.21-minm/s22.424.725.8

17、26.827.427.910-minm/s19.021.021.922.723.323.71-hrm/s17.819.620.421.321.722.1Operating events1-Year return periodExtreme storm events100-Year return periodTransportation events10-Year return periodBASIC DESIGN OFBZ34-1 OILFIELDS DEVELOPMENT PROJECTBD-SPC- WHPF(LQ)-ST-0001REV. 0?A one-third (1/3) incr

18、ease in allowable stresses shall be applied to load conditions of transportation.?A one-third (1/3) increase in allowable stresses shall be applied to load conditions of seismic.?The AISC basic allowable stresses shall not be increased in the load condition of operating environmental events, load-ou

19、t and lifting.4.3COMPUTER ANALYSIS?SACS program developed by Bentley of U.S.A shall be used in global structural analyses.?Structures shall be analyzed using proven and verified three dimensional computer space-frame analyses.?If applicable, proven and verified computer-aided code check procedures s

20、hall be used.?Where code checks are not applicable, allowable stresses shall be computed using rational procedures and appropriate factors of safety.4.4MEMBER SIZE SELECTION?Member sizes shall be selected on the basis of strength, stability, and economy.?Where possible, the number of different sizes

21、 of members - tubular and rolled shape - shall be kept to a minimum.?Major rolled shapes shall be compact sections as defined by AISC.4.5JOINT DESIGN Wherever possible, joints shall be designed as simple joints with no overlap. Primary plate girder or wide flange joints shall be designed in accordan

22、ce with the AISC specification.4.6SYSTEM OF UNITSThe SI system of units shall be used throughout calculations, reports and drawings. When using JIS or AISC or Europe standard shapes, their designation can be applied.4.7DEFLECTIONMid-span deflections of trusses and beams due to operating load shall b

23、e limited to 1/240 of the free span between supports. For cantilever beam, the deflection shall be limited to L/120, where L is the length of beam.5.0STRUCTURAL MODELS5.1GENERALSPECIFICATION FOR LIVING QUARTERS STRUCTURAL DESIGNPage 5 of 12BASIC DESIGN OFBZ34-1 OILFIELDS DEVELOPMENT PROJECTBD-SPC- W

24、HPF(LQ)-ST-0001REV. 0? Structural models shall represent all effects contributing to structure design and shall contain sufficient detail to accurately represent the weight, stability, stiffness, and environmental force characteristics of the structure.? Components of the structure simulated as simp

25、lified elements in the global stress analysis model shall be individually modeled and evaluated in detail giving due consideration to global and local loads, deflections, and support conditions.? Simple stick sketches representing all plans and elevations of the model shall be developed. Joints and

26、members shall be labeled with their corresponding computer model design nation.5.2MEMBERS? Computer models shall include all primary structural members.? Unless required for specific analysis, secondary members, handrail and stair may not be modeled as structural elements.? Dead loads of secondary m

27、embers and appurtenances shall be included in models.5.3JOINTS Joint cans and brace stubs shall be modeled for primary members. If greater than one quarter of the chord diameter, primary brace centerline offsets at joints shall be modeled.6.0MATERIAL6.1STEEL PROPERTIESFor all the structural steel ex

28、cept for sling, the following properties shall be used in the analysis and design.6.2STEEL TYPESPECIFICATION FOR LIVING QUARTERS STRUCTURAL DESIGNPage 6 of 12TypeMaterialMin. Yield Stress (MPa)Min. Tensile Stress (MPa)Pipe 406mm Dia.GB8162-2008 20#235390Pipe 406mm Dia.Rolled from Plate, GB/T712-2011

29、 DH36355490630Pipes in Joint CanRolled from Plate,355490630Steel Density in air7849 kg/m3Youngs Modulus, E200,000 MPaShear Modulus, G80,000 MPaPoissons Ratio, 0.25Coefficient of Thermal Expansion11.7 x 10-6/CBASIC DESIGN OFBZ34-1 OILFIELDS DEVELOPMENT PROJECTBD-SPC- WHPF(LQ)-ST-0001REV. 0Notes:? The

30、 selections of material shall be based design optimization.on structural calculating analyses and? Main tubular joints are designed using material with through thickness properties, if required.7.0STATIC ANALYSIS7.1GENERALStatic analysis in the in-service condition shall include the analyses for ext

31、reme storm and normal operating conditions.7.2BASIC LOAD CASES7.2.1Dead loadsDead loads are those unchangeable with the mode of platform operation. The dead loads should include the items as described in API RP 2AWSD.The structural self-weight of a minimum 10 percent uncertainty factor shall be cons

32、idered.7.2.2Live loadLive load should include the items as described in API RP 2A-WSD.Live load in following table should be used in analysis of structure. The live load should be applied over non-facility area, floor, main walkway and laydown area.SPECIFICATION FOR LIVING QUARTERS STRUCTURAL DESIGN

33、Page 7 of 12LocationLive Load (kN/m2)1*2*No equipment area on production deck5.02.5Floor2.51.25External walkway/stair5.02.5Heli-deck2.01.0Lay-down area10.05.0GB 712-2011 EH36-Z35(If required)H-beam H300X300GB/T700-2006 Q235B235370500H-beam H300X300JIS G3106-2008 SM490YB355490610Plate 12mm THK.GB/T71

34、2-2011 DH36355490630Plate 12mm THK.GB/T700-2006 Q235B235370500Angle beamGB/T700-2006 Q235B235370500BASIC DESIGN OFBZ34-1 OILFIELDS DEVELOPMENT PROJECTBD-SPC- WHPF(LQ)-ST-0001REV. 0Notes:1* for design of local or individual members2* for global design of structures7.2.3Equipment loadsEquipment loads

35、are the weight of all equipment, including piping, HVAC, electrical, outfitting, safety, mechanical, and instrumentation items. The detail data shall be presented in weight control report.7.2.4Wind loadsLoads which arise from the wind act on the exposed surfaces of the structure and its equipment. S

36、hielding effects, where appropriate, are to be considered.Wind loads shall include consideration of blocked areas resulting from work over/production packages and piping.The wind speeds for several durations should be used in accordance with API RP 2A- WSD.7.2.5Helicopter loadsThe helicopter type is

37、 BELL 212. The empty weight and full staff takeoff weight refer company data. The impact loads of landing and takeoff refer to DNV Rules for Classification of ships Part 6 Chapter 1 Jan.2012 and relative specification.7.3LOAD COMBINATIONSFollowing Table shows the principle for load combination. But

38、information contained in this table is intended for illustrative purposes only. The actual load combinations are to be individually assessed and presented.Notes:Design Conditions:SPECIFICATION FOR LIVING QUARTERS STRUCTURAL DESIGNPage 8 of 12Design Load(1)(2)Dead weight1.01.0Live loads0.751.0Storm W

39、ind1.00Oper Wind01.0Dry weight(equipment)1.01.0Opt weight-dry weight(equipment)0.751.0Helicopter opt weight2.0Wind pressure1.01.2Life boat muster area10.05.0BASIC DESIGN OFBZ34-1 OILFIELDS DEVELOPMENT PROJECTBD-SPC- WHPF(LQ)-ST-0001REV. 01* Storm wind load condition2* Operating wind load condition7.

40、4ENVIRONMENTAL LOAD DIRECTIONEnvironmental loads are to be considered as omni-directional, the environmental loads approaching directions along the diagonal of structural geometry will be also added to the LQ structure analyses.8.0SEISMIC ANALYSISThe LQ shall be designed for horizontal and vertical

41、earthquake force using combinations of simplified translational accelerations. The acceleration shall be derived from topside analysis. The accelerations shall be assumed to act in all directions simultaneously. A 1/3 increase in allowable stresses shall be used in the calculation of member unity ch

42、eck ratios.9.0INSTALLATION ANALYSIS9.1GENERALInstallation analysis shall include the analyses for load-out, transportation and lifting.9.2LOADOUT ANALYSISThere are two manners to load-out the structure onto barge, direct lifting and horizontal movement onto barge.If direct lift is to be used, the an

43、alyses shall be performed in lifting condition.If structure is skidded onto transportation barges. The analysis will be considered as following:? Effect of breakout forces.? Effect of racking during winching.? Partial loss of support to accommodate dimensional tolerances of skid rails and support no

44、des.? Vertical misalignment between quayside and barge.Breakout forces will be calculated based on a coefficient of friction of 0.20 and will be applied at leading or trailing pair of supports.Racking force due to uneven pulling will be applied as a horizontal load of 0.15x skid shoe reaction along

45、the skid rail.Effect of support settlement on the structure will be determined based on vertical misalignment between quayside and barge, the deflection of 25mm in the vertical plane shall be considered for support in the vertical plane normal to direction of skidding.SPECIFICATION FOR LIVING QUARTE

46、RS STRUCTURAL DESIGNPage 9 of 12BASIC DESIGN OFBZ34-1 OILFIELDS DEVELOPMENT PROJECTBD-SPC- WHPF(LQ)-ST-0001REV. 0Skid shoes are designed by the other contractor and satisfied load out analysis.9.3TRANSPORTATION ANALYSISTransportation analysis shall be performed in accordance with API RP 2A. In addit

47、ion, the following items shall be complied with:The LQ legs located on the barge skid beams will be restrained against translation in all directions.The wind load acting on the LQ shall be calculated in accordance with API RP 2A. One minute mean velocity of 10-year return period should be taken for

48、towing analysis. Four wind action directions (0 , 90 , 180 and 270 ) should be considered.9.3.1Barge motions9.3.2Transportation structural analysisThe transportation analysis is to check the structural adequacy of LQ structure and sea-fastenings for the transportation operation. The analysis shall c

49、onsider the following conditions:?The transportation model shall include dry weight of the structure and all non- structural items present during transportation and is to be developed from the Weight Control Report.?Sea-fastenings shall be modeled to provide support in the direction of restraint.?Th

50、e tow motions shall be determined from the dynamic response of the barge / LQ system described above.?Transportation contractor shall consider the Barge flexibility as a detailed transportation barge confirmed by Company.?Load combinations of self-weight heave roll and self-weight heave pitch shall

51、be considered in the analysis. The wind loads will be considered for the load combination. One minute mean with 10 years return period shall be used as the design wind speed for the sea motion and transportation analysis.All members and tubular joints shall be checked against the requirements of API

52、 RP2A and AISC with a one-third increase in basic allowable stresses.9.4LIFTING ANALYSISLQ modules lifting analysis shall be performed in accordance with the stipulation of API RP 2A. In addition, the following items should be complied with:SPECIFICATION FOR LIVING QUARTERS STRUCTURAL DESIGNPage 10

53、of 12ItemSingle amplitudeRoll2010 sec periodPitch1010 sec periodHeave0.2gBASIC DESIGN OFBZ34-1 OILFIELDS DEVELOPMENT PROJECTBD-SPC- WHPF(LQ)-ST-0001REV. 0 The sling angle at a minimum of 60 degrees deviation from the horizontal shall be considered. Dynamic load factors shall be considered in accorda

54、nce with API RP 2A.10.0APPURTENANCE DESIGN10.1HANDRAILS, WALKWAYS, AND STAIRWAYSHandrails, walkways, and stairways shall comply with requirements of relative regulations.Handrails shall be installed on the perimeter of walkways.Maximum gap between handrails shall not exceed 55mm.Kick plates shall be provided on handrails located in areas without pollution curbs.10.2PADEYE DESIGNThe padeyes shall be designed for the load factors defined under lifting analysis. Following add