《鋼結構安裝》課件-2.2.1 普通螺栓連接

2.2.1普通螺栓連接

Normalboltedconnection一、普通螺栓的種類及規(guī)格First，Typesandspecificationsofordinarybolts二、螺栓的排列和構造要求Second,thearrangementandconstructionrequirementsofbolts

一、普通螺栓的種類及規(guī)格First，Typesandspecificationsofordinarybolts六角頭型，代號M，公稱直徑d表示；建筑工程中的受力螺栓一般用M16以上的螺栓型號。Hexagonalheadtype,codeM,nominaldiameterddenotation;StressedboltsinconstructionprojectsgenerallyuseboltmodelsaboveM16A、B級---精制螺栓，性能等級為5.6或8.8級;ClassA,B---refinedbolts,performancelevel5.6or8.8;5或8表示fu≥500或800N/mm2,

0.6或0.8表示fy/fu=0.65or8meansfu≥500or800N/mm2,0.6or0.8meansfy/fu=0.6按其加工的精細程度和強度分為:A、B、C三個級別。Accordingtothefinenessandstrengthofitsprocessing,itisdividedinto:A,BandCthreelevels.一、普通螺栓的種類及規(guī)格First，TypesandspecificationsofordinaryboltsC級---粗制螺栓，性能等級為4.6或4.8級；ClassC---roughboltswithperformanceclass4.6or4.8;4表示fu≥400N/mm2,

0.6或0.8表示fy/fu=0.6或0.8；Ⅱ類孔，孔徑(do)-栓桿直徑(d)＝1.0～1.5mm。4meansfu≥400N/mm2,0.6or0.8meansfy/fu=0.6or0.8;ClassII.hole,aperture(do)-boltdiameter(d)=1.0~1.5mm.或0.8；Ⅰ類孔，孔徑(do)-栓桿直徑(d)＝0.3～0.5mm。Or0.8;ClassIhole,aperture(do)-boltdiameter(d)=0.3~0.5mm.二、螺栓的排列和構造要求Second,thearrangementandconstructionrequirementsofbolts1.并列—簡單、整齊、緊湊所用連接板尺寸小，但構件截面削弱大；Parallel-simple,neat,compactThesizeoftheconnectingplateissmall,butthecross-sectionofthecomponentisweakenedgreatlyB錯列WrongcolumnA并列juxtaposition中距Mediumrange中距Mediumrange邊距Margins邊距Margins端距Endpitch2.錯列—排列不緊湊，所用連接板尺寸大，但構件截面削弱?。籛rongcolumn-thearrangementisnotcompact,thesizeoftheconnectingplateusedislarge,butthecomponentsectionisweakenedsmall;

（1）受力要求:（1）Forcerequirements:垂直受力方向：為了防止螺栓應力集中相互影響、截面削弱過多而降低承載力，螺栓的邊距和端距不能太?。籚erticalforcedirection:inordertopreventtheboltstressconcentrationfromaffectingeachother,weakeningthesectiontoomuchandreducingthebearingcapacity,theedgeandenddistanceoftheboltshouldnotbetoosmall;順力作用方向：為了防止板件被拉斷或剪壞，端距不能太小；

Directionofforce:inordertopreventtheplatefrombeingpulledofforsheared,theenddistanceshouldnotbetoosmall;對于受壓構件：為防止連接板件發(fā)生鼓曲，中距不能太大。Forcompressionmembers:Inordertopreventdrumcurvatureoftheconnectingplates,themiddledistanceshouldnotbetoolarge.（2）構造要求；（2）constructionrequirements;螺栓的邊距和中距不宜太大，以免板件間貼合不密，潮氣侵入腐蝕鋼材。Themarginandmiddledistanceoftheboltshouldnotbetoolarge,soastoavoidthetightfitbetweentheplatesandmoistureintrusionintothecorrosivesteel.（3）施工要求

(3)Constructionrequirements為了便于扳手擰緊螺母，螺栓中距應不小于3do。Inordertofacilitatethewrenchtotightenthenut,theboltmediumdistanceshouldnotbelessthan3do.根據(jù)以上要求，規(guī)范給定了螺栓的容許間距。Accordingtotheaboverequirements,thespecificationgivestheallowablespacingofthebolts注:1.d0

為螺栓孔徑，t為外層薄板件厚度。Note:1.d0

istheboltborediameterandtisthethicknessoftheoutersheet.2.鋼板邊緣與剛性構件(如角鋼、槽鋼)相連的螺栓最大間距，可按中間排數(shù)值采用。2.Themaximumspacin