地脚螺栓的安装及载荷技术条件VIP

1、Issue 10.2003Descriptors: Anchor Bolts, Bolts, Steel StructureReplacesAnchor Bolts Application, Installation and Allowable LoadsOrig.:Checked:Appr.:Total 5 PagesIssue 06.2002Contents Page TOC o 1-5 h z HYPERLINK l bookmark0 o Current Document Scope12 3456 78 HYPERLINK l bookmark2 o Current Document

2、Normative References1 HYPERLINK l bookmark4 o Current Document General1 HYPERLINK l bookmark6 o Current Document Types of Bolts and Cases of Application (bolts acc. to LS 443-01)2 HYPERLINK l bookmark8 o Current Document Projections, Minimum Spacing and Lengths of Anchor Bolts3 HYPERLINK l bookmark1

3、0 o Current Document Materials, Grades and Safety Coefficients4 HYPERLINK l bookmark12 o Current Document Allowable Loads4 HYPERLINK l bookmark14 o Current Document Installation51 ScopeThis standard specifies casas of application of anchor bolts for fastening vessels and similar equipment as well as

4、 steel structures to concrete foundations and to other concrete structures.2 Normative ReferencesISO 898-1ASTM A193DIN 18800Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screwsand studsStandard Specification for Alloy-Steel and Stainless Steel Bolting Materia

5、ls for High Temperature ServiceSteel structuresLS 152-06 Specification of the Insulation BlocksLS 201-20 Supporting Skirts for Vertical VesselsLS 201-21 Templates Holding Anchor Bolts in PlaceLS 443-01 Anchor Bolts; Structural Dimensions and MaterialsASCE-Publication: Design of Anchor Bolts in Petro

6、chemical Facilities Issue 19973 GeneralAnchor bolts are installed to transfer tensile forces into the concrete, where these forces are picked up by the reinforcing and transferred into the foundation slab, which counteracts these forces by its size and weight.The transfer of the force from the bolt

7、into the reinforcing requires careful design, so that neither allowable concrete shear is exceeded nor diagonal tension will occur without sufficient reinforcing. Each anchor force must entirely be tied back with reinforcing except for those bolts, which are primarily designed for horizontal forces,

8、 e.g. in the case of horizontal vessels. For the detailing work reference is made to the ASCE publication Wind Loads and Anchor Bolt Design for Petrochemical Facilities5, which was issued in 1997.In this publication the following requirements are defined for high strength bolts of material ASTM A 19

9、3 Gr. B 7 or S355 NL respective, and a concrete B25, equivalent to a 28 day compressive strength of 25 N/mm2 or fc = 3,57 ksi acc. to ACI.1268bolt diameters bolt diameters bolt diametersMinimum embedmentMinimum edge distanceMinimum bolt spacingThese values interact with the actual force in the bolt.

10、 A closer spacing is admissible if the stress in the bolt is reduced, or embedment length and edge distance are increased.Page 2Issue 10.20034 Types of Bolts and Cases of Application (bolts acc. to LS 443-01)Table 1: Types of Bolts and Cases of ApplicationType of BoltType of BoltCases of Application

11、Subdivision acc. to Projection h above Foundation beforegrouting.Type AHorizontal vesselsSmall vertical vessels with single base ringLight steel structuresDiameter up to M 30Without insulationWith insulation of 95 mm thickness acc. to LS 152-06Type KLarge vertical vessels with single or with double

12、base ringColumnsHeavy steel structuresWithout insulationWith insulation of 95 mm thickness acc. to LS 152-06Case 3Vertical vessels and columns with double base ring 300 mm or 400 mm high acc. to LS 201-20All 3 cases are possible. Additionally there is an elongation required below the concrete.In cas

13、es, when bolts projecting above the foundation must be avoided (equipment erection at a later stage).Type G is used in concrete slabs and concrete beams, the thickness of which is not sufficient for anchoring acc. to type A or K.5 Projections, Minimum Spacing and Lengths of Anchor Boltsgroutinggrout

14、ingreinforced concrete foundationFigure 1: Definition of Projecting Length, Total Length and Minimum Distance of Anchor BoltsMinimum SpacingEdge DistanceTable 2: Projections, Minimum Spacing and Lengths of Anchor BoltsBolt SizeProjection hAbove Ungrouted Foundation for Bolts Type A, K, KR and GBolt

15、Project.for Type G DownwardMinimum recommended spacing 1)Length of Anchor Boltsbetween 2 Boltsto the edgeATypeKKR 2)Case 1Case 2Case 3ShortLong 2)M 16140240-55140120500450-M2015025043060160150630500-M24160260435652001508008008001075M 30190290460752502008009009001170M3621031047092300250-100010001260M

16、42230330490102340300-110011001360M48250-510115390300-120012001460M 56270-530125450400140014001660M 64-550-520400-1700-1700M72*6-670-590500-1900-1900M80*6-700-640500-2050-2050M90*6-720-720600-2250-2250M 100*6-750-800600-2500-25001) For minimum spacing see chapter 2 GeneralPage 4Issue 10.20036 Materia

17、ls, Grades and Safety CoefficientsTable 3: Materials, Grades and Safety CoefficientsType of BoltMaterial, Gradeacc. to EN| acc. to ASTMSafety Coefficient1)Design TemperatureOperating ConditionsErection, Testing and Earth QuakeAsee LS 443-011,851,4see LS 443-01K, KR, G1,851,4K, KR, G1,851,41) The all

18、owable loads in table 4 are based on safety coefficients acc. to DIN 18800.Allowable LoadsWith the grades of materials given in LS 443-01 and the safety factors in table 3 result the following allowable loads.Table 4: Allowable Loads1) The specified forces are calculated with the yield strength of t

19、he EN-material, the safety coefficients acc. to table 3 and the stress area of the bolt thread.BoltSizeAreaPallowable in kN for Bolt Type 1)Initial Prestressing Forces and Tightening Torques 2)Stressmm2Shaftmm2A 4.6K, KR and G S355J2K, KR and G 25CrMo4S355J225CrMo4Erec.Oper.Erec.Oper.Erec.Oper.Fvmax

20、 kNMANmFvmax kNMANmM 1615720126,920,439,830,150,538,216,739,821,250,4M 2024531442,031,860,445,778,859,625,47533,197,8M 2435345260,545,887,065,8113,585,936,512947,7169M 3056170796,272,8138,2104,6180,3136,558,125975,7337M 368171020一201,3152,4262,6198,784,6449110586M 4211201390-268,2203,0360,3272,71136

21、98151938M4814701810-352,5266,7462,9350,314810501941380M 5620302640-485,8367,6638,0482,820416802682210M 6426803320-621,2470,1841,0636,526124203533280M72*634604420803,9608,41088,4823,633834804574710M80*643405030-1008,4763,11365,31033,242448005606350M90*655906360-1257,8951,81716,91299,352867107219160M

22、100*670007850-1575,01191,92150,01627,06619330903127362) The initial stress forces and tightening torques are calculated with the following parameters:Utilization of the yield strength 30%; tightening factor = 1,6; coefficient for friction for the thread = 0,16; coefficient of friction for the suppor

23、t = 0,20.InstallationThe bolts must be placed in the form work precisely in position, in elevation and in exactly vertical position, according to the form work drawings. The bolts must be secured against movement during casting of concrete. For the supply and the details of templates holding the bolts in place during concreting see LINDE standard LS 201-21.Final deviation of the bolts from