Article(id=1276896869074727113, tenantId=1146029695717560320, journalId=1276577754012160025, issueId=1276896661737701828, articleNumber=null, orderNo=null, doi=10.3724/j.gyjzG26032606, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1774454400000, receivedDateStr=2026-03-26, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1782365537183, onlineDateStr=2026-06-25, pubDate=1779206400000, pubDateStr=2026-05-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1782365537183, onlineIssueDateStr=2026-06-25, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1782365537183, creator=13701087609, updateTime=1782365537183, updator=13701087609, issue=Issue{id=1276896661737701828, tenantId=1146029695717560320, journalId=1276577754012160025, year='2026', volume='56', issue='5', pageStart='1', pageEnd='264', issueExtLink='null', onlineDate='null', pubDate='1779206400000', pubDateStr='2026-05-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1782365487751, creator='13701087609', updateTime=1782367237543, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1276904000968589318, tenantId=1146029695717560320, journalId=1276577754012160025, issueId=1276896661737701828, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1276904000968589319, tenantId=1146029695717560320, journalId=1276577754012160025, issueId=1276896661737701828, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=159, endPage=166, ext={EN=ArticleExt(id=1276896869527711947, articleId=1276896869074727113, tenantId=1146029695717560320, journalId=1276577754012160025, language=EN, title=Research on the Fatigue Performance of Prestress-Strengthened Right-Angle Abrupt-Section Steel Crane Beams, columnId=null, journalTitle=Industrial Construction, columnName=null, runingTitle=null, highlight=null, articleAbstract=
This study investigated the fatigue life of steel crane beams through fatigue testing and combined finite element analysis to reveal the stress distribution changes at the support of variable-section beams before and after prestress strengthening. In addition, the equivalent structural stress method was employed to predict the fatigue life corresponding to the initiation of 20 mm cracks at the support. The results indicated that prestress strengthening significantly reduced the stress level at critical welds, while the location of maximum stress and the failure mode remained unchanged. With increasing prestress control values, both the overall failure life of the beam and the crack initiation life at the support were significantly extended. Under a prestress control value of 12.5 t, the strengthening effectiveness factors for overall beam failure and visible support cracks reached 4.08 and 4.23, respectively, demonstrating the effectiveness of high-level prestressing.
, authors=null, authorsList=Liang LI, Lingyi MAO, Haosong CHANG, Zhikuan REN, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1276896873726210285, articleId=1276896869074727113, tenantId=1146029695717560320, journalId=1276577754012160025, language=CN, title=预应力加固直角突变式钢吊车梁疲劳性能研究, columnId=1276896697703858872, journalTitle=工业建筑, columnName=工程诊断与性能提升技术, runingTitle=null, highlight=null, articleAbstract=
通过疲劳试验研究钢吊车梁的失效寿命,并结合有限元分析揭示变截面吊车梁支座处在加固前后的应力及分布变化,同时基于等效结构应力法预测支座处20 mm裂纹萌生时的疲劳寿命。研究结果表明:预应力加固显著降低了关键焊缝的应力水平,最大应力位置及破坏模式保持不变;随着张拉控制值的增加,梁整体失效寿命及支座裂纹萌生寿命均得到显著延长;在125 kN张拉控制值条件下,钢吊车梁整体失效和支座可见裂纹出现的加固效果系数分别达到4.08和4.23,充分说明高预应力水平下加固效果明显。
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, authorsList=李亮, 毛凌一, 常好诵, 任志宽, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=
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1Inspection and Certification Co., Ltd., MCC, Beijing100088, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1276896876226015491, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, authorId=1276896874435047679, language=CN, stringName=李亮, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1中冶检测认证有限公司,北京100088, bio={"content":"
李亮,硕士,高级工程师,主要从事工业建筑检测鉴定与加固技术研究,86499685@qq.com。
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李亮,硕士,高级工程师,主要从事工业建筑检测鉴定与加固技术研究,86499685@qq.com。
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1中冶检测认证有限公司,北京100088)])]), Author(id=1276896876305707269, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, orderNo=1, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1276896876460896519, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, authorId=1276896876305707269, language=EN, stringName=Lingyi MAO, firstName=Lingyi, middleName=null, lastName=MAO, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2Ningbo Industrial Architectural Design & Research Institute Co., Ltd., Ningbo315000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1276896876532199688, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, authorId=1276896876305707269, language=CN, stringName=毛凌一, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2宁波市工业建筑设计研究院有限公司,浙江宁波315000, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1276896874187583730, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, xref=2, ext=[AuthorCompanyExt(id=1276896874195972339, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, companyId=1276896874187583730, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2宁波市工业建筑设计研究院有限公司,浙江宁波315000)])]), Author(id=1276896876876132618, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1276896876968407308, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, authorId=1276896876876132618, language=EN, stringName=Haosong CHANG, firstName=Haosong, middleName=null, lastName=CHANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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3Science and Technology Institute of Urban Safety Development (Shenzhen), Shenzhen518000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1276896877303951629, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, authorId=1276896876876132618, language=CN, stringName=常好诵, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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3城市安全发展科技;研究院(深圳),广东深圳518000, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1276896874263081206, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, xref=3, ext=[AuthorCompanyExt(id=1276896874271469815, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, companyId=1276896874263081206, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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4China Academy of Building Research, Beijing100013, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1276896878121840914, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, authorId=1276896877694021903, language=CN, stringName=任志宽, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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4中国建筑科学研究院有限公司,北京100013, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1276896874351161594, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, xref=4, ext=[AuthorCompanyExt(id=1276896874355355899, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, companyId=1276896874351161594, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
4China Academy of Building Research, Beijing100013, China), AuthorCompanyExt(id=1276896874367938812, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, companyId=1276896874351161594, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
4中国建筑科学研究院有限公司,北京100013)])])], keywords=[Keyword(id=1276896878239281427, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, orderNo=1, keyword=steel crane beam), Keyword(id=1276896878558048532, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, orderNo=2, keyword=prestress), Keyword(id=1276896878650323221, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, orderNo=3, keyword=equivalent structural stress method), Keyword(id=1276896878973284630, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, orderNo=4, keyword=fatigue performance enhancement), Keyword(id=1276896880646811927, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, orderNo=1, keyword=钢吊车梁), Keyword(id=1276896881095602456, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, orderNo=2, keyword=预应力), Keyword(id=1276896881527615769, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, orderNo=3, keyword=等效结构应力法), Keyword(id=1276896881963823386, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, orderNo=4, keyword=疲劳性能提升)], refs=[Reference(id=1276896892093067584, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, doi=null, pmid=null, pmcid=null, year=2019, volume=49, issue=5, pageStart=166, pageEnd=169, url=null, language=null, rfNumber=[1], rfOrder=0, authorNames=赵晓青, 幸坤涛, 常好诵, journalName=工业建筑, refType=null, unstructuredReference=赵晓青,幸坤涛,常好诵,
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2020., articleTitle=钢吊车梁变截面支座概率损伤容限法研究, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1276896874091114735, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, xref=1, ext=[AuthorCompanyExt(id=1276896874103697648, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, companyId=1276896874091114735, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3城市安全发展科技;研究院(深圳),广东深圳518000)]), AuthorCompany(id=1276896874351161594, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, xref=4, ext=[AuthorCompanyExt(id=1276896874355355899, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, companyId=1276896874351161594, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
4China Academy of Building Research, Beijing100013, China), AuthorCompanyExt(id=1276896874367938812, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, companyId=1276896874351161594, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
4中国建筑科学研究院有限公司,北京100013)])], figs=[ArticleFig(id=1276896882764935451, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 1, caption=
Coordinate transformation of nodal loads, figureFileSmall=PBB1RnPlzD7l7LaE2IqHiQ==, figureFileBig=WV2xLfgilLIHfQapOh5/pA==, tableContent=null), ArticleFig(id=1276896883175977244, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图1, caption=
节点载荷坐标转换, figureFileSmall=PBB1RnPlzD7l7LaE2IqHiQ==, figureFileBig=WV2xLfgilLIHfQapOh5/pA==, tableContent=null), ArticleFig(id=1276896885298295069, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 2, caption=
Transformation from nodal forces to line forces, figureFileSmall=XAfuzJ+5PeOhZtOYxbOSMw==, figureFileBig=Q3D2ZhKD9Z3qdigWF8GVKw==, tableContent=null), ArticleFig(id=1276896885398958366, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图2, caption=
节点力与线力转化, figureFileSmall=XAfuzJ+5PeOhZtOYxbOSMw==, figureFileBig=Q3D2ZhKD9Z3qdigWF8GVKw==, tableContent=null), ArticleFig(id=1276896885759668511, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 3, caption=
Crane beam dimensions and crane wheel pressure distribution, figureFileSmall=L50XXKc6CkUzQrI5xGewEw==, figureFileBig=hLFifu8vXzlmrhm5AhBYuw==, tableContent=null), ArticleFig(id=1276896885835165984, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图3, caption=
吊车梁尺寸和天车轮压分布 mm, figureFileSmall=L50XXKc6CkUzQrI5xGewEw==, figureFileBig=hLFifu8vXzlmrhm5AhBYuw==, tableContent=null), ArticleFig(id=1276896886099407137, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 4, caption=
Design of the scaled specimen model, figureFileSmall=m6HBTNYobLn09E6maOEqCA==, figureFileBig=2UXO7JlUTkCtZDL/QjVQTQ==, tableContent=null), ArticleFig(id=1276896886174904610, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图4, caption=
缩尺试件模型设计, figureFileSmall=m6HBTNYobLn09E6maOEqCA==, figureFileBig=2UXO7JlUTkCtZDL/QjVQTQ==, tableContent=null), ArticleFig(id=1276896886237819171, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 5, caption=
Prestress tensioning of crane beams, figureFileSmall=VjYv129yo3pkrP/I8+qI8A==, figureFileBig=+XafoCzuVepv+QiKqZneYQ==, tableContent=null), ArticleFig(id=1276896886300733732, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图5, caption=
吊车梁预应力张拉, figureFileSmall=VjYv129yo3pkrP/I8+qI8A==, figureFileBig=+XafoCzuVepv+QiKqZneYQ==, tableContent=null), ArticleFig(id=1276896886363648293, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 6, caption=
Schematic of crane beam test loading, figureFileSmall=TI31TJcrDrbOrXBgCVhbQQ==, figureFileBig=lj0WuuAyF/Ow6moVX9V4mw==, tableContent=null), ArticleFig(id=1276896886434951462, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图6, caption=
吊车梁试验加载示意, figureFileSmall=TI31TJcrDrbOrXBgCVhbQQ==, figureFileBig=lj0WuuAyF/Ow6moVX9V4mw==, tableContent=null), ArticleFig(id=1276896886518837543, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 7, caption=
Fatigue crack morphology of prestress-strengthened steel crane beams, figureFileSmall=a2Z8Uilc4Q5a/inlbWKrcw==, figureFileBig=TKeEe1dPDruR/MaHisTJWQ==, tableContent=null), ArticleFig(id=1276896886606917928, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图7, caption=
预应力加固钢吊车梁疲劳裂纹形态, figureFileSmall=a2Z8Uilc4Q5a/inlbWKrcw==, figureFileBig=TKeEe1dPDruR/MaHisTJWQ==, tableContent=null), ArticleFig(id=1276896886678221097, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 8, caption=
Fatigue life and strengthening effectiveness factors, figureFileSmall=p8lBI8YR9xurJafBtJWXvA==, figureFileBig=gPV7fRd+0RopwTjqBHIR1g==, tableContent=null), ArticleFig(id=1276896886762107178, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图8, caption=
疲劳寿命与加固效果系数C, figureFileSmall=p8lBI8YR9xurJafBtJWXvA==, figureFileBig=gPV7fRd+0RopwTjqBHIR1g==, tableContent=null), ArticleFig(id=1276896886858576171, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 9, caption=
Finite element model of the prestress-strengthened steel crane beam, figureFileSmall=QVw3Xa4LTZ4XWSBZKzaefw==, figureFileBig=YsPZx3sWNzIp2wD4rkoHoQ==, tableContent=null), ArticleFig(id=1276896886925685036, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图9, caption=
预应力加固钢吊车梁有限元模型, figureFileSmall=QVw3Xa4LTZ4XWSBZKzaefw==, figureFileBig=YsPZx3sWNzIp2wD4rkoHoQ==, tableContent=null), ArticleFig(id=1276896886996988205, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 10, caption=
Meshing of the crane beam model, figureFileSmall=M/EKL7Yp69SnZnRmJO54hQ==, figureFileBig=WrRCK1u29moazYimKyzJEw==, tableContent=null), ArticleFig(id=1276896887076679982, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图10, caption=
吊车梁模型网格划分, figureFileSmall=M/EKL7Yp69SnZnRmJO54hQ==, figureFileBig=WrRCK1u29moazYimKyzJEw==, tableContent=null), ArticleFig(id=1276896887147983151, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 11, caption=
Comparison of maximum principal stress distribution of the crane beam before and after strengthening, figureFileSmall=Wio2HHN9YVBydWAmnFx3HA==, figureFileBig=4qdrxsj2EwD2FFOBd7A89Q==, tableContent=null), ArticleFig(id=1276896887215092016, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图11, caption=
吊车梁加固前后最大主应力分布对比 MPa, figureFileSmall=Wio2HHN9YVBydWAmnFx3HA==, figureFileBig=4qdrxsj2EwD2FFOBd7A89Q==, tableContent=null), ArticleFig(id=1276896887399641393, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 12, caption=
Comparison of Mises stress distribution of the crane beam before and after strengthening, figureFileSmall=P6bm8uCjcHS8wqViZG1vFA==, figureFileBig=D3oN+KnOlbfzfCZhPVE8Ug==, tableContent=null), ArticleFig(id=1276896887504498994, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图12, caption=
吊车梁加固前后Mises应力分布对比 MPa, figureFileSmall=P6bm8uCjcHS8wqViZG1vFA==, figureFileBig=D3oN+KnOlbfzfCZhPVE8Ug==, tableContent=null), ArticleFig(id=1276896887823266099, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 13, caption=
Comparison of structural stresses of the crane beam before and after prestressed strengthening, figureFileSmall=alCec0PbSWMdwrRZL0agog==, figureFileBig=YgAgZcqC0wDmrzZPPv1Iaw==, tableContent=null), ArticleFig(id=1276896887898763572, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图13, caption=
预应力加固后前后吊车梁结构应力对比, figureFileSmall=alCec0PbSWMdwrRZL0agog==, figureFileBig=YgAgZcqC0wDmrzZPPv1Iaw==, tableContent=null), ArticleFig(id=1276896887995232565, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 14, caption=
Weld line and its initial elements and nodes, figureFileSmall=MiBhUaEMRS5nSewx2laaxQ==, figureFileBig=hApH2GmyXV37SUSidDefCg==, tableContent=null), ArticleFig(id=1276896889651982646, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图14, caption=
焊线及起始单元、节点, figureFileSmall=MiBhUaEMRS5nSewx2laaxQ==, figureFileBig=hApH2GmyXV37SUSidDefCg==, tableContent=null), ArticleFig(id=1276896889756840247, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 15, caption=
Fatigue life distribution of welds and fatigue life corresponding to 20 mm crack at support base, figureFileSmall=qhDYuodCHFY8yqcMNbU23g==, figureFileBig=nHD+QsMnkGsIZWdTKkJ8Ww==, tableContent=null), ArticleFig(id=1276896889865892152, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图15, caption=
焊缝寿命分布及支座底部裂纹20 mm对应的疲劳寿命 次
, figureFileSmall=qhDYuodCHFY8yqcMNbU23g==, figureFileBig=nHD+QsMnkGsIZWdTKkJ8Ww==, tableContent=null), ArticleFig(id=1276896889937195321, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Fig. 16, caption=
Trends in fatigue life growth of the crane beam under different prestress tensioning control values, figureFileSmall=rj6jvNEN7CB0i3OnVzSSIQ==, figureFileBig=QqEe5Eq28SjXjvfz8zpvBA==, tableContent=null), ArticleFig(id=1276896890440511802, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=图16, caption=
不同预应力张拉控制值下吊车梁疲劳寿命增长趋势, figureFileSmall=rj6jvNEN7CB0i3OnVzSSIQ==, figureFileBig=QqEe5Eq28SjXjvfz8zpvBA==, tableContent=null), ArticleFig(id=1276896890708947259, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Table 1, caption=
Loading conditions and prestress tensioning control values
, figureFileSmall=null, figureFileBig=null, tableContent=
试件编号 | 加载位置 | 加载荷载/kN | 张拉控制值/kN | 疲劳寿命/万次 |
|---|
| Pmin | Pmax |
|---|
| L-1 | 采用分布梁进行两点加载 | 50 | 500 | 0 | 180 |
| L-2 | 50 | 500 | 50 | 240 |
| L-3 | 50 | 500 | 75 | 440 |
| L-4 | 50 | 500 | 100 | 650 |
| L-5 | 50 | 500 | 125 | 735 |
), ArticleFig(id=1276896891115794748, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=CN, label=表1, caption=
加载条件及预应力张拉控制值
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试件编号 | 加载位置 | 加载荷载/kN | 张拉控制值/kN | 疲劳寿命/万次 |
|---|
| Pmin | Pmax |
|---|
| L-1 | 采用分布梁进行两点加载 | 50 | 500 | 0 | 180 |
| L-2 | 50 | 500 | 50 | 240 |
| L-3 | 50 | 500 | 75 | 440 |
| L-4 | 50 | 500 | 100 | 650 |
| L-5 | 50 | 500 | 125 | 735 |
), ArticleFig(id=1276896891262595390, tenantId=1146029695717560320, journalId=1276577754012160025, articleId=1276896869074727113, language=EN, label=Table 2, caption=
Mechanical properties of steels and steel strands
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| 型号 | 密度/(kg·m-3) | 弹性模量/MPa | 泊松比 | 线膨胀系数 |
|---|
| Q355B | 7800 | 206000 | 0.3 | — |
| 1×7ϕ15.2 | 7800 | 195000 | 0.3 | 1.2×10-5 |
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钢材及钢绞线的材料力学性能
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| 型号 | 密度/(kg·m-3) | 弹性模量/MPa | 泊松比 | 线膨胀系数 |
|---|
| Q355B | 7800 | 206000 | 0.3 | — |
| 1×7ϕ15.2 | 7800 | 195000 | 0.3 | 1.2×10-5 |
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