Design Method Study for Sealant Joint Width of Precast Concrete Facade Panels
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摘要: 确定板缝宽度是整体式外挂墙板设计中的关键环节,其关系到外挂墙板的抗震、抗风、防水、气密及防火性能。合理的板缝宽度对于外挂墙板平面内对主体结构层间位移角的适应能力和密封胶的位移能力至关重要。基于密封胶的位移能力,提出了名义剪切变形率,给出了名义剪切变形率的计算式,并进行了校准,可直接用于板缝宽度计算。同时,给出了考虑温度变形、地震作用、风荷载、施工误差和其他影响因素以及密封胶变形能力的板缝宽度计算方法,提出了设防烈度和罕遇地震作用下层间变位要求的板缝宽度验算要求。最后通过某具体工程算例,分析了外挂墙板和主体结构连接方式对接缝宽度的影响,并针对不同墙板高度和连接方式给出了接缝宽度取值,可为类似工程设计提供参考。Abstract: Determining sealant joint width is the key issue during the design of precast concrete facade panels, which is related to seismic, wind-resistant, waterproof, airtight, and fireproof performance of building facade panels system, and a reasonable sealant joint width is very important for the in-plane adaptability of the panels to the story drift of main structures and the displacement ability of the sealant. Based on the displacement ability of the sealant, the nominal shear deformation rate was put forward in this paper, and then calibrated, which can be directly used to calculate sealant joint size. The calculation method of sealant joint width was given by considering the influence factors of thermal movement, seismic movement, wind load movement, construction tolerances and sealant movement capacity, and the movement check computation of sealant joint width was suggested for the story drift of the main structure during fortification earthquake and rare earthquake. Finally, through a specific project example, it analyzed the impact of the connection mode of precast concrete facade panels and the main structure on the width of the joints, and gave the value of the joint width for different facade panel heights and connection modes, which can provide a reference for similar projects.
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[1] 日本建筑学会. 建筑工事标准式样书同解说-防水工事:JASS8[S]. 东京:日本建筑学会,2012. [2] PCI. Design handbook precast and prestressed concrete[M]. 8th Ed. Chicago:Handbook Committee,2017. [3] American Society for Testing and Materials. Standard guide for calculating movement and other effects when establishing sealant joint width:ASTM C1472-16[S]. West Conshohocken:American Society for Testing and Materials,2022. [4] Deutsches Institut fur Normung E V. Sealing of exterior wall joints in building using joint sealants:DIN 18540-2006[S]. Berlin:Deutsches Institut fur Normung E V,2014. [5] 尹衍梁,詹耀裕,黄绸辉. 台湾地区润泰预制结构施工体系[J],混凝土世界,2012(10):55-64. [6] 卢家森. 装配整体式混凝土框架实用设计方法[M]. 长沙:湖南大学出版社,2016. [7] 何利,沙慧玲,种迅,等. 预制混凝土外挂墙板连接及对结构抗震性能影响研究进展[J]. 工业建筑,2024,54(4):207-218. [8] 郁银泉,肖明,王赞,等. 预制混凝土外挂墙板板间接缝宽度研究[J]. 建筑结构,2019,49(11):1-8. [9] 中华人民共和国住房和城乡建设部,预制混凝土外挂墙板应用技术标准:JGJ/T 458—2018[S]. 北京:中国标准出版社,2018. [10] 中国工程建设标准化协会. 装配式建筑密封胶应用技术规程:T/ CECS 655—2019[S]. 北京:中国建筑工业出版社,2019. [11] 梁建国,江婉莹,罗家豪,等. 湖南地区装配式混凝土外挂墙板接缝宽度研究[J]. 湖南城市学院学报(自然科学版),2022,31(2):5-8. [12] Japanese Standards Association. Sealants for sealing and glazing in buildings:JIS A5758∶2022[S] Tokyo:Japanese Industrial Standards Committee,2022. [13] 刘枫,刘军进,孔慧,等. 超高层结构竖向压缩变形对单元式幕墙设计影响[J]. 建筑结构,2017,47(11):61-64. [14] 傅学怡. 实用高层建筑结构设计[M]. 2版. 北京:中国建筑工业出版社,2010. -
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