Article(id=1156949465203564836, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1156949362480861758, articleNumber=null, orderNo=null, doi=10.12404/j.issn.1671-1815.2401349, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1709136000000, receivedDateStr=2024-02-29, revisedDate=1731945600000, revisedDateStr=2024-11-19, acceptedDate=null, acceptedDateStr=null, onlineDate=1753767847586, onlineDateStr=2025-07-29, pubDate=1738944000000, pubDateStr=2025-02-08, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753767847586, onlineIssueDateStr=2025-07-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753767847586, creator=13701087609, updateTime=1753767847586, updator=13701087609, issue=Issue{id=1156949362480861758, tenantId=1146029695717560320, journalId=1146123166801305609, year='2025', volume='25', issue='4', pageStart='1312', pageEnd='1751', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1753767823094, creator=13701087609, updateTime=1755171161273, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1162835389472424814, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1156949362480861758, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1162835389472424815, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1156949362480861758, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1595, endPage=1601, ext={EN=ArticleExt(id=1156949465883042105, articleId=1156949465203564836, tenantId=1146029695717560320, journalId=1146123166801305609, language=EN, title=Tensile Performance of a Socket Grouted Sleeve Suitable for Horizontal Joints in Double Skin Composite Shear Walls, columnId=1156262729917780302, journalTitle=Science Technology and Engineering, columnName=Papers·Architectural Science, runingTitle=null, highlight=null, articleAbstract=

When utilizing double skin composite shear walls as the primary components for resisting lateral forces in buildings, it is crucial to ensure proper horizontal connection of the walls. Currently, traditional bolt connections and welding are the main methods used for horizontal connection of these walls. However, these methods present significant challenges during construction and do not fully exploit the structural advantages of the wall. Based on the structural characteristics of this type of wall, a new type of horizontal joint connection node was designed for the upper and lower layers of the wall. This new design featured a socket-type square semi-grouted sleeve connection. The influence of steel bar diameter, sleeve length, grouting material strength, and sleeve form on the tensile performance of this new connection node was explored using finite element simulation. The results indicate that this new node effectively connects the horizontal joints of double skin composite shear walls with several advantages including convenient construction and reliable performance. Furthermore, it is observed that failure mainly occurs on connecting steel bars which achieves an “equivalent cast-in-place” goal for prefabricated double skin composite shear walls.

, correspAuthors=Zhen-bao LI, 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, authorCompany=null, fund=null, authors=null, authorsList=Jun-qiang LÜ, Zhen-bao LI, Bei-bei YANG, Zhen-yun TANG), CN=ArticleExt(id=1156949564856033849, articleId=1156949465203564836, tenantId=1146029695717560320, journalId=1146123166801305609, language=CN, title=建筑科学适于双钢板组合剪力墙水平连接的承插式方形半灌浆套筒抗拉性能, columnId=1156262730517565784, journalTitle=科学技术与工程, columnName=论文·建筑科学, runingTitle=null, highlight=null, articleAbstract=使用双钢板组合剪力墙作为建筑主要抗侧力构件时,墙体水平连接至关重要,而目前用于该墙体的主要水平连接方式还是传统的螺栓连接和焊接,这在施工上具有较大的不便性,且未能充分发挥该墙体的结构优势。根据这种墙体的结构特点,设计一种新型的上下层墙体水平缝连接节点,承插式方形半灌浆套筒连接,利用有限元模拟探究钢筋直径、套筒长度、灌浆料强度和套筒形式对该新型连接节点抗拉性能的影响。结果表明:该节点能较好地连接双钢板组合剪力墙的水平拼缝,具有施工便捷、性能可靠的优点,且节点破坏主要发生在连接钢筋上,能够使装配式双钢板组合剪力墙实现“等同现浇”的目标。, correspAuthors=李振宝, authorNote=null, correspAuthorsNote=
*李振宝(1962—),男,汉族,山东济宁人,博士,教授。研究方向:结构与工程抗震。E-mail:
, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=navwNfR3sP+J3+2aUsUouw==, magXml=X4yaRCthefWefkMYSrefRQ==, pdfUrl=null, pdf=fSsdVu6XEEV2s4G9+T9EIA==, pdfFileSize=12125308, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=s+WOPJISNG/VYuJuy5hXNQ==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=q10kwoXpUlulX9zQEZi2BQ==, mapNumber=null, authorCompany=null, fund=null, authors=

吕俊强(1998—),男,汉族,河南周口人,硕士研究生。研究方向:防灾减灾工程及防护工程。E-mail:

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吕俊强(1998—),男,汉族,河南周口人,硕士研究生。研究方向:防灾减灾工程及防护工程。E-mail:

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吕俊强(1998—),男,汉族,河南周口人,硕士研究生。研究方向:防灾减灾工程及防护工程。E-mail:

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σtσcu分别为峰值拉、压应力;σc0为初始屈服应力;${\epsilon }_{c}^{in}$为非弹性应变;${\epsilon }_{oc}^{el}$${\epsilon }_{ot}^{el}$受拉和受压弹性应变;${\epsilon }_{c}^{pl}$${\epsilon }_{t}^{pl}$分别为受压和受拉塑性应变;${\epsilon }_{t}^{ck}$为受拉开裂应变;dtdc分别为受拉和受压损伤系数;E0为初始弹性模量

, figureFileSmall=cXeSIomdjlwofb512hxSwQ==, figureFileBig=SXyTewWggvCzN6ONxhVacg==, tableContent=null), ArticleFig(id=1225944430096597996, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Fig.4, caption=Constitutive relationship curve of steels, figureFileSmall=oU0dxJkriI4iRGmRWW0W4w==, figureFileBig=nupjYxIai7ZAHdpfuU4GpQ==, tableContent=null), ArticleFig(id=1225944430352450560, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=CN, label=图4, caption=钢材本构关系曲线

σuσ2分别为钢筋、套筒的极限应力;σ0σ1分别为钢筋、套筒的屈服应力;ε0ε1分别为钢筋、套筒的弹性应变;εuε2分别为钢筋、套筒的极限应变

, figureFileSmall=oU0dxJkriI4iRGmRWW0W4w==, figureFileBig=nupjYxIai7ZAHdpfuU4GpQ==, tableContent=null), ArticleFig(id=1225944430658633751, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Fig.5, caption=Test specimen and finite element model diagram, figureFileSmall=P/lQ8e2FrugHVsb9ACaI6g==, figureFileBig=9ILGyjjygUj8bDGX+E+2FQ==, tableContent=null), ArticleFig(id=1225944430788657183, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=CN, label=图5, caption=试验试件及有限元模型图, figureFileSmall=P/lQ8e2FrugHVsb9ACaI6g==, figureFileBig=9ILGyjjygUj8bDGX+E+2FQ==, tableContent=null), ArticleFig(id=1225944430872543274, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Fig.6, caption=Comparison of Load Displacement Curve, figureFileSmall=pApIGRHPpkW/4eyOd0ok/w==, figureFileBig=hCgO0npQ9QtBLOypKGw8Nw==, tableContent=null), ArticleFig(id=1225944430973206581, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=CN, label=图6, caption=荷载-位移曲线对比, figureFileSmall=pApIGRHPpkW/4eyOd0ok/w==, figureFileBig=hCgO0npQ9QtBLOypKGw8Nw==, tableContent=null), ArticleFig(id=1225944431128395838, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Fig.7, caption=Load displacement curve of nodes with different diameters of connecting steel bars, figureFileSmall=0e2+aHNJNPoXI2QB/VzSHQ==, figureFileBig=TDVb2KqMQFfVTKZck2lcow==, tableContent=null), ArticleFig(id=1225944431245836354, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=CN, label=图7, caption=连接钢筋直径不同时节点荷载-位移曲线, figureFileSmall=0e2+aHNJNPoXI2QB/VzSHQ==, figureFileBig=TDVb2KqMQFfVTKZck2lcow==, tableContent=null), ArticleFig(id=1225944431329722447, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Fig.8, caption=Mises cloud map of connecting steel bars, figureFileSmall=ElOk04f3h0lY4DNjQJp9Mg==, figureFileBig=W/Q4u8XQ+icWDHM9e44yjA==, tableContent=null), ArticleFig(id=1225944431497494622, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=CN, label=图8, caption=连接钢筋Mises云图, figureFileSmall=ElOk04f3h0lY4DNjQJp9Mg==, figureFileBig=W/Q4u8XQ+icWDHM9e44yjA==, tableContent=null), ArticleFig(id=1225944431656878189, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Fig.9, caption=Load displacement curve of nodes with different sleeve lengths, figureFileSmall=KlkkdRsmXkeydt1oNyX2GA==, figureFileBig=voMHmlUM5ZmSVnyUx1PKSA==, tableContent=null), ArticleFig(id=1225944431929507975, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=CN, label=图9, caption=套筒长度不同时节点荷载-位移曲线, figureFileSmall=KlkkdRsmXkeydt1oNyX2GA==, figureFileBig=voMHmlUM5ZmSVnyUx1PKSA==, tableContent=null), ArticleFig(id=1225944432101474452, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Fig.10, caption=Load displacement curve of nodes with different strength of grouting materials, figureFileSmall=Hy3c5YYpCSiqm5HAsv6huw==, figureFileBig=FbLSD8JUpUtMGk8DxQTaOg==, tableContent=null), ArticleFig(id=1225944432260858020, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=CN, label=图10, caption=灌浆料强度不同时节点荷载-位移曲线, figureFileSmall=Hy3c5YYpCSiqm5HAsv6huw==, figureFileBig=FbLSD8JUpUtMGk8DxQTaOg==, tableContent=null), ArticleFig(id=1225944432478961845, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Fig.11, caption=Load displacement curve of nodes with different sleeve shapes, figureFileSmall=kLARro1ecPX2GCsEnNFSnA==, figureFileBig=HbRG6vXvDNeDsn1qkQsVzA==, tableContent=null), ArticleFig(id=1225944433804361919, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=CN, label=图11, caption=套筒形状不同时节点荷载-位移曲线, figureFileSmall=kLARro1ecPX2GCsEnNFSnA==, figureFileBig=HbRG6vXvDNeDsn1qkQsVzA==, tableContent=null), ArticleFig(id=1225944433963745477, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Fig.12, caption=Mises stress cloud map of the sleeve, figureFileSmall=ZOKkyqgdPYA1XfDZDqmRwA==, figureFileBig=0iLeB1i9As6NgLrnHU96pQ==, tableContent=null), ArticleFig(id=1225944434215403735, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=CN, label=图12, caption=套筒的Mises应力云图, figureFileSmall=ZOKkyqgdPYA1XfDZDqmRwA==, figureFileBig=0iLeB1i9As6NgLrnHU96pQ==, tableContent=null), ArticleFig(id=1225944434332844255, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Fig.13, caption=Distribution of inflection points in the yield stage curve, figureFileSmall=5ZmnyX818iOmbTtcKVQ7tg==, figureFileBig=hXIaDtsaI9fKUckE1lmDwg==, tableContent=null), ArticleFig(id=1225944434563530986, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=CN, label=图13, caption=屈服阶段曲线拐点分布图, figureFileSmall=5ZmnyX818iOmbTtcKVQ7tg==, figureFileBig=hXIaDtsaI9fKUckE1lmDwg==, tableContent=null), ArticleFig(id=1225944434689360114, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Fig.14, caption=Mises stress cloud map of connecting steel bars at various turning points, figureFileSmall=mY9lTkat47846GGgjmSptw==, figureFileBig=bt/XjGCe+MI/uEzHgEY4vw==, tableContent=null), ArticleFig(id=1225944434823577850, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=CN, label=图14, caption=各拐点连接钢筋Mises应力云图, figureFileSmall=mY9lTkat47846GGgjmSptw==, figureFileBig=bt/XjGCe+MI/uEzHgEY4vw==, tableContent=null), ArticleFig(id=1225944434945212674, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156949465203564836, language=EN, label=Table 1, caption=

Basic information of specimens

, figureFileSmall=null, figureFileBig=null, tableContent=
试件编号 钢筋直径
/mm
套筒长度
/mm
灌浆料强度
/MPa
套筒形状
JD-D1 12 160 80 方形
JD-D2 14 160 80 方形
JD-D3 16 160 80 方形
JD-T1 14 160 80 方形
JD-T2 14 200 80 方形
JD-T3 14 240 80 方形
JD-C1 14 200 60 方形
JD-C2 14 200 80 方形
JD-C3 14 200 100 方形
JD-X1 14 160 60 方形
JD-X2 14 160 60 梯形
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试件基本信息

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试件编号 钢筋直径
/mm
套筒长度
/mm
灌浆料强度
/MPa
套筒形状
JD-D1 12 160 80 方形
JD-D2 14 160 80 方形
JD-D3 16 160 80 方形
JD-T1 14 160 80 方形
JD-T2 14 200 80 方形
JD-T3 14 240 80 方形
JD-C1 14 200 60 方形
JD-C2 14 200 80 方形
JD-C3 14 200 100 方形
JD-X1 14 160 60 方形
JD-X2 14 160 60 梯形
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建筑科学适于双钢板组合剪力墙水平连接的承插式方形半灌浆套筒抗拉性能
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吕俊强 , 李振宝 * , 杨贝贝 , 唐贞云
科学技术与工程 | 论文·建筑科学 2025,25(4): 1595-1601
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科学技术与工程 | 论文·建筑科学 2025, 25(4): 1595-1601
建筑科学适于双钢板组合剪力墙水平连接的承插式方形半灌浆套筒抗拉性能
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吕俊强 , 李振宝* , 杨贝贝, 唐贞云
作者信息
  • 北京工业大学城市与工程安全减灾教育部重点实验室, 北京 100124
  • 吕俊强(1998—),男,汉族,河南周口人,硕士研究生。研究方向:防灾减灾工程及防护工程。E-mail:

通讯作者:

*李振宝(1962—),男,汉族,山东济宁人,博士,教授。研究方向:结构与工程抗震。E-mail:
Tensile Performance of a Socket Grouted Sleeve Suitable for Horizontal Joints in Double Skin Composite Shear Walls
Jun-qiang LÜ , Zhen-bao LI* , Bei-bei YANG, Zhen-yun TANG
Affiliations
  • The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China
出版时间: 2025-02-08 doi: 10.12404/j.issn.1671-1815.2401349
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使用双钢板组合剪力墙作为建筑主要抗侧力构件时,墙体水平连接至关重要,而目前用于该墙体的主要水平连接方式还是传统的螺栓连接和焊接,这在施工上具有较大的不便性,且未能充分发挥该墙体的结构优势。根据这种墙体的结构特点,设计一种新型的上下层墙体水平缝连接节点,承插式方形半灌浆套筒连接,利用有限元模拟探究钢筋直径、套筒长度、灌浆料强度和套筒形式对该新型连接节点抗拉性能的影响。结果表明:该节点能较好地连接双钢板组合剪力墙的水平拼缝,具有施工便捷、性能可靠的优点,且节点破坏主要发生在连接钢筋上,能够使装配式双钢板组合剪力墙实现“等同现浇”的目标。
双钢板组合剪力墙  /  水平缝  /  套筒连接  /  有限元分析

When utilizing double skin composite shear walls as the primary components for resisting lateral forces in buildings, it is crucial to ensure proper horizontal connection of the walls. Currently, traditional bolt connections and welding are the main methods used for horizontal connection of these walls. However, these methods present significant challenges during construction and do not fully exploit the structural advantages of the wall. Based on the structural characteristics of this type of wall, a new type of horizontal joint connection node was designed for the upper and lower layers of the wall. This new design featured a socket-type square semi-grouted sleeve connection. The influence of steel bar diameter, sleeve length, grouting material strength, and sleeve form on the tensile performance of this new connection node was explored using finite element simulation. The results indicate that this new node effectively connects the horizontal joints of double skin composite shear walls with several advantages including convenient construction and reliable performance. Furthermore, it is observed that failure mainly occurs on connecting steel bars which achieves an “equivalent cast-in-place” goal for prefabricated double skin composite shear walls.

double skin composite shear wall  /  horizontal joint  /  sleeve connection  /  finite element analysis
吕俊强, 李振宝, 杨贝贝, 唐贞云. 建筑科学适于双钢板组合剪力墙水平连接的承插式方形半灌浆套筒抗拉性能. 科学技术与工程, 2025 , 25 (4) : 1595 -1601 . DOI: 10.12404/j.issn.1671-1815.2401349
Jun-qiang LÜ, Zhen-bao LI, Bei-bei YANG, Zhen-yun TANG. Tensile Performance of a Socket Grouted Sleeve Suitable for Horizontal Joints in Double Skin Composite Shear Walls[J]. Science Technology and Engineering, 2025 , 25 (4) : 1595 -1601 . DOI: 10.12404/j.issn.1671-1815.2401349
双钢板混凝土组合剪力墙作为组合剪力墙的一种结构形式,能有效结合钢与混凝土的性能特点,与钢筋混凝土剪力墙相比,其承载能力、耗能能力及延性都有所提高,同时具有施工简便、 相对经济、自重较轻的优势[1]。近年来,众多学者针对其力学性能和结构形式开展了大量研究。盖彤彤等[2]对圆管支撑钢板仓组合剪力墙的抗震性能进行有限元分析,得到剪力墙的承载能力、变形能力与钢板强度、厚度,以及混凝土强度、轴压比等参数之间的关系,并对墙体的抗剪承载力计算公式进行修正。文献[3-4]对使用哑铃型拉结件的双钢板组合剪力墙的抗震性能和“墙梁”连接节点进行了试验研究,并提出了墙体的抗弯承载力计算公式,结果表明:双钢板组合剪力墙具有较高的承载力,墙体的破坏模式主要是外部钢板的局部屈曲和内部混凝土压碎。
虽然双钢板组合剪力墙在高层及超高层建筑中的性能优越,但该结构存在构件尺寸大、运输和加工困难等缺点[5],因此有学者以墙体的拼缝连接为对象展开了研究。文献[6-8]研究了螺栓连接下,不同水平缝和竖向缝连接的双钢板组合剪力墙的抗震性能,并分析了不同参数对一字形水平缝墙体抗震性能的影响,结果表明:水平缝的形状对墙体力学性能无明显影响,而不同的水平缝连接方式对墙体的承载能力、变形能力和刚度均有影响。朱峰岐等[9]结合螺栓连接、焊接和后灌浆工艺,设计了一种适用于双钢板组合剪力墙的承插式水平缝连接节点,介绍了使用该节点时墙体的施工流程,并对连接节点进行有限元分析,结果表明:所设计的连接节点可有效连接组合墙体的水平缝。
为了提升施工便宜性,避免现场焊接和螺栓连接,并充分发挥双钢板组合剪力墙的结构优势,在以往研究的基础上,提出一种新型的承插式方形半灌浆套筒连接方式。因剪力墙承受水平荷载时,该连接节点所受的竖向拉力是其受力薄弱环节,因此对不同参数下该连接节点的抗拉性能进行分析。研究成果可为实际工程应用提供理论依据和技术支持。
双钢板组合剪力墙是由外侧钢板和内部的混凝土构成,其中钢板为主要的抗侧力构件,混凝土为主要承压构件。针对这种结构特点,提出一种承插式方形半灌浆套筒连接的水平缝连接方式,图1(a)为墙体钢板预处理后的示意图,措施是将垫板焊接到钢板下部(装配时起到定位和限位的作用),连接钢筋焊接在垫板上,方形套筒焊接在钢板上部。图1(a)为墙体钢构件部分的示意图,两侧钢板可使用拉结件进行连接,能在浇筑内部混凝土时充当模板。图1(a)为上下层墙体通过方形半灌浆套筒连接示意图,施工时,在下层剪力墙浇筑混凝土后,向其套筒内加入灌浆料,之后通过吊装的形式将上层组合剪力墙的连接钢筋插入方形套筒内。拼装完成后,再进行上层墙体混凝土的浇筑,以此类推,直至完成整个建筑剪力墙水平缝的连接。承插式方形半灌浆套筒连接节点如图1(a)所示,该节点由4部分构成,分别是套筒、垫板、连接钢筋和灌浆料。因连接钢筋上端通过焊接连接到垫板上,只有下端是通过浆锚形式与套筒连接,因此称为半灌浆套筒连接。又因为与传统的灌浆套筒先连接后注浆不同,该连接方式是先灌浆后插入,因此称为承插式连接。该节点中垫板可传递连接钢筋与上层钢板之间的相互作用,并在装配时调节和固定连接钢筋的位置,保证拼装时连接钢筋能够插入套筒的正中央和灌浆料初凝前剪力墙钢板不移动。
由文献[10]可知,影响套筒锚固性能的因素有套筒壁厚度、锚固长度、套筒内直径大小、灌浆料的材料性能、套筒内壁形式、受力钢筋表面粗糙度等。在此基础上,考虑到套筒与钢板连接的难易程度,将传统的圆形套筒改为方形套筒,并探究方形与梯形的套筒形式对连接性能的影响。
考虑到承插式方形半灌浆套筒连接为一种新型的连接方式,单个连接节点的连接强度未知,因此取出单个节点,如图2所示,利用ABAQUS有限元软件进行分析。
依据钢结构规范要求,为保证构件有足够的净截面面积,不使板件被拉断,节点模型上层钢板取宽160 mm、高120 mm的部分,下层钢板取宽160 mm、高200 mm的部分。方形套筒的边长40 mm×40 mm,高度为160 mm,厚度为3 mm。因方形套筒中心距剪力墙钢板的距离为20 mm,所以在保证装配时连接钢筋能够插入方形套筒正中央的条件下,连接钢筋的半径与垫板厚度之和为20 mm。标准试件中钢筋直径为14 mm,垫板厚度为13 mm。
灌浆套筒中所用的灌浆料具有微膨胀性,结合灌浆料的粘接作用,使得灌浆料与套筒和连接钢筋之间能够相互挤压,因此当连接钢筋受拉时,灌浆料会受到剪切力和双向侧压力,工程中常用的灌浆料强度通常在80 MPa以上,而现有规范给出的本构模型只适用于强度在80 MPa以下的混凝土,当强度超过80 MPa时,规范中的损伤参数变为负值,无法应用于ABAQUS中的塑性损伤模型。根据文献[11],得到适用于灌浆料的本构模型,如图3所示。
图4所示,为了充分考虑钢材的包兴格效应及屈服、硬化与软化特性,连接钢筋采用Esmaeily-Xiao本构模型,套筒和剪力墙钢板的材料本构关系选择双斜线模型[11]
图5所示,根据刘轩[10]对方形和圆形钢管套筒连接性能的研究,分别选取不同钢筋直径下,套筒长度为315 mm的方形灌浆套筒试验试件进行有限元模拟。有限元模拟结果与试验结果对比如图6所示,可以看出,有限元模型可以较好地模拟承载力、刚度,以及连接节点屈曲后承载力的退化现象,说明本文有限元建模方法有效。
并且由试验及有限元结果可知,连接节点的破坏均发生在连接钢筋上,说明可以通过对节点某些参数的设计,使节点强度与连接钢筋强度一致,进而实现承插式方形半灌浆套筒连接下装配式组合剪力墙等同现浇的目标。
对于灌浆套筒连接来说,抗拉性能是其受力薄弱环节,因此采用规范中给出的材料强度及上述材料本构模型,研究钢筋直径、套筒长度、灌浆料强度及套筒形状对承插式方形半灌浆套筒抗拉性能的影响。各试件信息如表1所示。
在轴向拉力作用下,节点的荷载-位移曲线如图7所示。图8为连接节点破坏时连接钢筋的Mises应力云图。随着钢筋直径的增加,承插式方形半灌浆套筒连接节点的极限强度不断增加,而屈服强度基本一致,说明增大连接钢筋的直径能有效提高连接节点的极限强度。当连接钢筋的直径是16 mm时,极限强度是直径14 mm的1.3倍,是直径12 mm的1.9倍。当位移达到14.62 mm时,直径为12 mm的连接钢筋发生断裂;直径为14 mm和16 mm的连接钢筋均未发生断裂。
在轴向拉力作用下,节点的荷载-位移曲线如图9所示,随着套筒长度即锚固长度的增加,承插式方形半灌浆套筒连接节点的屈服强度不断增加,而极限强度基本一致,说明增加套筒长度可提高连接节点的屈服强度。套筒长度为240 mm的连接节点,屈服强度是长度为200 mm的1.1倍,是长度为160 mm的1.4倍,说明在套筒长度为200 mm的基础上减小套筒长度,对节点屈服强度影响较为明显。
在轴向拉力作用下,连接节点的荷载-位移曲线如图10所示,当灌浆料的强度为60~80 MPa时,灌浆料强度对连接节点的屈服强度和极限强度均有影响,但都较小。主要表现为灌浆料强度越大屈服强度越高,极限强度会较早出现,即连接节点的延性有所下降。当灌浆料的强度为80~100 MPa时,灌浆料强度变化对连接节点的影响几乎一致,说明此时改变灌浆料强度已无法提高连接节点的连接性能。
为探究套筒形状对承插式半灌浆套筒连接强度的影响,在方形套筒的基础上,建立了梯形套筒连接试件,设计原则是保证其与方形套筒所能灌入的灌浆料总量相同,为保证连接钢筋顺利插入,上端开口为30 mm×40 mm,则下端尺寸为50 mm×40 mm。
在轴向拉力作用下,连接节点的荷载-位移曲线如图11所示,可见套筒形式的改变对连接节点屈服强度和极限强度都有影响。当连接套筒由方形改变为梯形时,连接节点的屈服强度降低而极限强度提高。图12为连接节点破坏时套筒的Mises应力云图。
模拟中采用的钢筋型号为HRB400,屈服强度为400 MPa,而实际加载时,荷载在40 kN时,连接节点发生屈服,此时换算到钢筋上的应力约为260 MPa,与屈服强度标准值差距较大。对此,以钢筋直径14 mm、套筒长度200 mm的试件为例,对连接节点的屈服阶段进行分析。
图13所示,在试件的荷载位移曲线上,将屈服阶段的拐点标记为1~4,并将每个拐点下连接节点的应力云图调出,逐步进行分析。
分析图14(a)图14(a)可知,拐点1时,连接钢筋的局部达到了屈服,而拐点2时,屈服部分基本消失,即由拐点1到拐点2的过程中,连接钢筋局部屈服,位移增大的情况下承载力反而下降;由图14(a)图14(a)可知,随着位移持续增大,在拐点2消失的屈服部分又开始了出现,直至拐点3屈服部分达到最大;由图14(a)图14(a)可知,随着位移的继续增大,屈服部分又消失,直至拐点4,屈服部分全部消失。综上可知,节点的屈服是由于连接钢筋发生局部屈服导致的。
(1)根据双钢板组合剪力墙结构特点设计的承插式方形半灌浆套筒连接,具有施工方便、连接整体效果好的优点,可通过控制连接钢筋直径和套筒长度使节点强度与连接钢筋强度一致,从而实现等同现浇的目标。
(2)连接钢筋的直径对承插式方形半灌浆套筒连接的极限强度有明显影响,随着直径增大,极限强度也会相应提高;连接钢筋的锚固长度对节点的屈服强度有较大影响,锚固长度越大,屈服强度越高。灌浆料强度达到80 MPa时,即可满足该节点的强度需求。梯形套筒在受力性能上要略优于方形套筒。
(3)连接节点出现屈服阶段是由于连接钢筋出现了局部屈服,随着位移的增大,最终能够实现连接钢筋材料性能的充分发挥。
  • 国家自然科学基金(51978014)
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2025年第25卷第4期
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doi: 10.12404/j.issn.1671-1815.2401349
  • 接收时间:2024-02-29
  • 首发时间:2025-07-29
  • 出版时间:2025-02-08
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  • 收稿日期:2024-02-29
  • 修回日期:2024-11-19
基金
国家自然科学基金(51978014)
作者信息
    北京工业大学城市与工程安全减灾教育部重点实验室, 北京 100124

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*李振宝(1962—),男,汉族,山东济宁人,博士,教授。研究方向:结构与工程抗震。E-mail:
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2种不同金属材料的力学参数

Family
属数
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genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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