AnnexAnnexAnnexAnnex2:2:2:2:FormFormFormFormofofofofSubmissionSubmissionSubmissionSubmissionforforforforJCPLJCPLJCPLJCPLBestBestBestBestPracticePracticePracticePractice(Submityourcontribution(Annex2formandsoftcopyoftheproposal)viaemailtokmd@jurong.com)AuthorAuthorAuthorAuthor(s)/(s)/(s)/(s)/作者::::徐丽惠Originator:Originator:Originator:Originator:Dept/Dept/Dept/Dept/部门::::设计部TitleTitleTitleTitleofofofofSubmissionSubmissionSubmissionSubmission////题目::::钢结构柱脚锚栓计算方法A.A.A.A.TypesTypesTypesTypesofofofofSubmissionSubmissionSubmissionSubmission////类型::::(�Pleasetick1ofthesubmissiontype/请选择其中一项)B.B.B.B.CategoryCategoryCategoryCategory////专业分目::::(�Cantickmorethan1field/可多选)����ResearchResearchResearchResearchPapersPapersPapersPapers////研究报告����DesignDesignDesignDesignResourcesResourcesResourcesResources&&&&DetailsDetailsDetailsDetails////设计资源及细节�ProceduresProceduresProceduresProcedures////过程����FormsFormsFormsForms&&&&templatestemplatestemplatestemplates////表格及样本����OthersOthersOthersOthers////其它ByByByByDiscipline:Discipline:Discipline:Discipline:�Architectural�Civil�Structural�Mechanical�Electrical�QuantitySurveying�Masterplanning�Others:FacilityManagementByByByByProjectProjectProjectProjectPhases:Phases:Phases:Phases:�BusinessDevelopment�Design&Documentation�AuthoritySubmission�Construction�PostConstruction����Others_____________C.C.C.C.SynopsisSynopsisSynopsisSynopsis////摘要::::关于钢结构柱脚锚栓的计算方法D.D.D.D.KeywordsKeywordsKeywordsKeywords////关键词:柱脚锚栓计算方法E.E.E.E.ContentsContentsContentsContents////内容::::见附件F.F.F.F.DateDateDateDateofofofofSubmissionSubmissionSubmissionSubmission////上交日期::::8888/10101010/2003G.G.G.G.SignatureSignatureSignatureSignatureofofofofOriginatorOriginatorOriginatorOriginator////作者签名::::徐丽惠钢结构柱脚锚栓计算方法设计部结构工程师徐丽惠裕廊国际顾问(苏州)有限公司苏州工业园区215021关键词:柱脚锚栓计算方法一、前言钢结构柱脚锚栓的计算方法在我国1974年的《钢结构设计规范》(TJ17-74)第78条中有明确规定,但在修订后的《钢结构设计规范》(GBJ17-88)中,取消了这一条,为什么呢?我认为有两个原因:(一),考虑到这是一个普通的力学计算问题,不必在规范中作出明确的规定;(二),对于钢结构柱脚锚栓计算方法较多,拘于一种计算显然不合适。锚栓的计算是结构设计中经常遇到的问题,同样也是十分重要的问题,有些设计者甚至把它当作是钢结构设计中最重要的问题之一,因此,科学、合理地计算锚栓是十分必要的,本文从此观点出发,针对曾在设计过的工程应用实例中,列举出工程中较常用的几种锚栓计算方法,供设计人员今后钢结构设计时参考。二、计算方法工程实例:以下内力用于柱脚锚栓的计算:N=530.0KNM=335.0KN*me=M/N=0.632m钢筋混凝土基础采用C20,其轴心抗压强度设计值fc=10N/mm2弹性模量Ec=25.5x103N/mm2,不计局部受压时混凝土强度的提高。锚栓抗拉强度设计值fta=140N/mm2,,钢材弹性模量:E=206x103N/mm2柱脚底板尺寸:宽度b=460mm长度d=800mm方法一:弯矩平衡法柱脚为刚性柱脚,底板与混凝土基础顶间的应力分布为线性分布,见图1.1—1σmax=N/bd+6M/bd2=530x103/460x800+6x335x106/460x8002=1.44+6.83=8.27N/mm2σmin=N/bd-6M/bd2=530x103/460x800-6x335x106/460x8002=1.44-6.83=-5.39N/mm2受压区长度x=dσmax/(σmax-σmin)(1.1)=800x8.27/(8.27+5.39)=484.33mm由ΣMc=0得锚栓拉力T:T(d0-x/3)+N(d/2-x/3)=M式中:d0=d-c锚栓中心线到受压区底板边的最大距离。T=M-N(d/2-x/3)/(d0-x/3)(1.2)=[335x106-530x103(800/2-484.33/3)]/(700-484.33/3...