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1、常熟市海天科技综合楼摘要本设计是对常熟海天综合科技楼的设计。该科研楼的结构主体为四层结构,局部为五层。结构主体为钢框架结构,采用钢与混凝土组合楼盖,基础为独立扩展基础。结构设计考虑到了结构的抗震性能,在有关地震效应计算时,主要参考国家现行规范。结构的计算的主要内容依次如下:PKPM软件计算初步选取构件尺寸,荷载的计算,内力的计算,构件的验算,构件的连接设计,柱下扩展基础的设计。其中内力考虑了风荷载、地震荷载、雪荷载等多种荷载,构件和节点的验算均考虑了有震及无震两种情况。根据不同力的作用方式选择计算方法,其中计算:框架刚度采用“
2、D值法”;水平地震作用计算采用“底部剪力法”,竖向荷载作用下采用分层法,风荷载作用下的内力计算采用反弯点法。计算中采用了一些合理的假定,如不考虑屋面结构找坡,当作平屋定计算,从而使计算结构对称,可取一半结构,大大简化计算,且误差仅在1.5%左右。计算中注意对手算结果和电算结果的比较,可以对软件计算和手算各自的特点有更充分的认识。在计算组合梁挠度时,按简支梁简化计算。计算组合板负弯矩时,按单跨两端固支简化计算。在具体的结构计算中以国家现行规范为依据。关键词:钢框架结构节点设计钢构件设计AbstractThedesignObjec
3、tisChangshuHaitianIntegratedScienceandTechnologyBuilding.Thisbuildingisfour-strory,partiallyfive.Themainformofit’sstructureissteelframestructure,whilethefloorissteelandconcretecompositefloor.Thebuildingusesingleextendedfoundation.thestructuraldesignbasesongraduation
4、projectrequests,suchasthecapacityofresistingtheearthquake.inthecalculation,thesolutionsaboutearthquakecomputingisaccordingtotheaseismiccode,whichisournationalnoruns.specificlyspeaking,theprocessofthestructuraldesignareasfollows,judgethesizeofthememberofstructure,cal
5、culatetheload,calculatetheinternalforce,designtheconectionofmembers,designthesingleextendedfoundationunderthecolumn.Whencalculatetheinternalforce,manyloadsaretakenintoconsideration,suchasthewindload,theseismicload,thesnowloadandetc;whencheckthesteelmemberandtheconne
6、ctions,thenormalsituationandseismicsituationarebothconsidered.Accordingtodifferentmodesofselectionmethod,whichcalculated:framerigidity"D";Seismiclevelscalculatedusing"bottomshear,"underverticalloadstratified,WindLoadCalculationofinternalforcesofanti-bendingpointmeth
7、od.Inthecalculation,Iadoptsomereasonableassumptions.Forinstance,ignoretheslopemadefordrainingthewater,treattheroofasflatroofsothatthestructureissymmetrical.Andwhenthestructureissymmetrical,wecantakehalfoftheittocalculate,thusgreatlyreducetheworkloadandtheerrorrangei
8、sOnly1.5%.Ialsocomparetheresultsbetweenhandcountandsoftware,sothatIcanknowbetteraboutthedifferencebetweenthem.Whencalculatethedeformationo