摘要本工程为大同市某办公楼建筑结构设计办公楼工程，采用框架结构，主体为三层，本地区抗震设防烈度为7度，近震，场地类别为II类场地。主导风向为东南，基本风压0.55KN/m2，基本雪压0.25KN/m2。楼﹑屋盖均采用现浇钢筋混凝土结构。本设计主要进行了结构方案中横向框架第9轴抗震设计。在确定框架布局之后，先进行了层间荷载代表值的计算,接着利用顶点位移法求出自震周期，进而按底部剪力法计算水平地震荷载作用下大小，进而求出在水平荷载作用下的结构内力（弯矩、剪力、轴力）。接着计算竖向荷载（恒载及活荷载）作用下的结构内力。是找出最不利的一组或几组内力组合。选取最安全的结果计算配筋并绘图。总之，适用、安全、经济、使用方便是本设计的原则。设计合理可行的建筑结构方案是现场施工的重要依据。关键词：框架结构、抗震设计、荷载计算、内力计算、计算配筋AbstractTheDatongCityinanofficebuildinginbuildingstructuredesignofofficebuilding,aframeworkstructure,themainbodyofthreelayer,localseismicfortificationintensityis7degrees,neartheearthquakesiteclassificationasclassIIvenues.Thedominantwinddirectiontothesoutheast,thebasicpressure0.55KN/m2,basicsnowpressure0.25KN/m2.Floorandroofofcast-in-placereinforcedconcretestructure.Thisdesignmainlycarriesonthestructureplaninthehorizontalframeninthaxisseismicdesign.Afterdeterminingtheframelayoutofthefirstlayerbetweentherepresentativevalueoftheloadcalculation,andthendemandtheuseofvertexdis-placementfromtheearthquakecycle,thenaccordingtothebottomshearmethodtocalculatethehorizontalseismicloadundersize,thencalculatedundertheactionofhorizontalloadstructureinternalforce(bendingmoment,shearingforceandaxialforce).Thentheinternalforceofthestructureundertheverticalload(constantloadandliveload)iscalculated..Istofindthemostunfavorablecombinationofagrouporafewgroupsofinternalforces.Selectthemostsecureresultsforcalculationofreinforcementanddrawing..Inshort,theapplication,safety,economy,easeofuseistheprincipleofthisdesign.Thereasonableandfeasibleconstructionschemeistheimportantbasisforfieldconstruction..本工程为大同市某办公楼建筑结构设计办公楼工程，采用框架结构，主体为三层，本地区抗震设防烈度为7度，近震，场地类别为II类场地。主导风向为东南，基本风压0.55KN/M，基本雪压0.25KN/M。楼﹑屋盖均采用现浇钢筋混凝土结构。Keywords:framestructure,/eismicdesign、oadcalculation、internalforcecalculation、calculationandreinforcement.目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc421530455"1建筑设计PAGEREF_Toc421530455\h1HYPERLINK\l"_Toc421530456"1.1工程概况PAGEREF_Toc421530456\h1HYPERLINK\l"_Toc421530457"1.2柱网尺寸