装配式外墙凹槽板节点力学性能试验研究  

EXPERIMENTAL STUDY ON JOINT CAPACITY OF PREFABRICATED COMPOSITE INSULATION FACADE PANEL WITH GROOVE

作　　者：吴丽丽[1] 刘斌 罗虎林 崔海宁 侯建群 WU Li-li;LIU Bin;LUO Hu-lin;CUI Hai-ning;HOU Jian-qun(School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Architectural Design and Research Institute of Tsinghua University Co.,Ltd.,Beijing 100083,China;Beijing Engineering Research Center of High-rise and Large-span Prestressed Steel Structures,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]清华大学建筑设计研究院有限公司,北京100083 [3]北京工业大学北京市高层和大跨度预应力钢结构工程技术研究中心,北京100124

出　　处：《工程力学》2025年第5期122-132,217,共12页Engineering Mechanics

基　　金：国家自然科学基金项目(52178177);中国矿业大学(北京)越崎杰出学者奖励计划项目(2602021RC59);清华大学建筑设计院有限公司院级科研课题项目(KYN2021-041);重庆市建设科技项目:钢结构住宅配套固模墙板、楼板研究(城科字2020第2-1)。

摘　　要：装配式外墙凹槽板(以下简称凹槽板)是一种新型非承重外围护复合夹芯墙板,内、外叶板均采用加气混凝土条板,夹芯层采用聚苯乙烯泡沫(EPS)保温板,墙顶凹槽可在浇筑混凝土梁时当作模板使用。分别开展了44个加气混凝土单板试件和32个凹槽板试件的节点承载力试验,研究了加气混凝土等级、条板厚度、保温板厚度、垫片规格和加强措施等参数变化对单板和凹槽板节点试件的承载力及破坏特征的影响。试验结果表明:采用圆形垫片的试件均发生了冲切破坏;增加条板厚度和加气混凝土强度对提高节点承载力有显著作用,如加气混凝土板厚度从75 mm提高到100 mm时,单板节点承载力可提高60%,加强型凹槽板节点承载力可提高41.8%;增加保温层厚度对凹槽板节点承载力影响很小。增大圆形垫片直径、厚度和设置横向加强钢筋虽不能大幅提高节点承载力,但对增强节点刚度和防止节点脆性拔出破坏效果显著。建议长度为3.15 m的凹槽板采用的垫片直径≥50 mm且厚度≥2.5 mm,长度为3.5 m的凹槽板的垫片直径≥50 mm且厚度≥3.0 mm。在不设置加强措施的情况下,普通型凹槽板承载力与直接受荷的内叶板同规格单板试件节点承载力相近;在两端及中间连接节点保温板内设置加强钢管和垫片的情况下,加强型凹槽板节点承载力可以达到普通型凹槽板节点承载力的1.7倍~2.1倍;在加强管材两端设置垫片的加强型凹槽板承载力显著高于未设置垫片的情况。The prefabricated composite insulation facade panel with groove is a new type of non-load-bearing external sandwich wallboard.The inner and outer leaf plates are made of aerated concrete,and the sandwich layer is made of polystyrene foam(EPS)insulation board.The groove on the top of the wall can be used as formwork for pouring concrete beams.The bearing capacity tests on 44 single panel joints and on 32 composite panel joints were carried out,respectively.Investigated are the effects of parameters such as the strength and the thickness of aerated concrete panel,the thickness of insulation board,the specification of gasket and strengthening measures etc.,on the bearing capacity and on failure characteristics of single-plate and composite panel joint specimens.The results showed that:punching failure occurred in most of the specimens with circular gaskets;and increasing the thickness of slab and the strength of aerated concrete could greatly increase the bearing capacity of joints.For example,when the thickness of aerated concrete panel increased from 75 mm to 100 mm,the bearing capacity of single panel joints and of composite panel joints could be increased by 60%and 41.8%,respectively.The thickness of insulation layer hardly affects the bearing capacity of composite panel joints.Although increasing the diameter and the thickness of gaskets and installing transverse reinforcing bars could not significantly improve the bearing capacity of joints,they had obvious effects on enhancing the stiffness of joints and preventing brittle pull-out failure of joints.It is recommended that the diameter of gasket should be no less than 50 mm for composite insulation panel with a length of 3.15 m and 3.5 m,and that the thickness of gasket should be no less than 2.5 mm for panels with a length of 3.15 m and 3mm for panels with a length 3.5 m,respectively.Without reinforcement measures,the joint bearing capacity of ordinary composite insulation facade panel was similar to that of directly loaded single plate specimens.The bearing

关 键 词：装配式 凹槽板 加气混凝土 连接节点 加强措施 

分 类 号：TU528.72[建筑科学—建筑技术科学]