预制混凝土夹心保温墙体GFRP连接件抗剪性能研究  

Study on Shear Resistance of GFRP Connectors for Precast Concrete Sandwich Insulation Wall Panels

作　　者：曲秀姝 李中杰 孙岩波[2] QU Xiushu;LI Zhongjie;SUN Yanbo(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044;Beijing Building Construction Research Institute Co.Ltd.,Beijing 100039)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京市建筑工程研究院有限责任公司,北京100039

出　　处：《北京建筑大学学报》2024年第3期94-101,共8页Journal of Beijing University of Civil Engineering and Architecture

基　　金：国家自然科学基金项目(52378118)。

摘　　要：纤维增强材料连接件因导热系数低、耐久性好等特点,在建筑外墙中具有广阔的工程应用前景。然而,纤维增强材料连接件抗剪性能较差,有必要开展采用纤维增强材料连接件的墙板抗剪性能研究。利用Abaqus有限元软件,选择合理的混凝土和连接件本构模型,建立4种不同类型连接件的数值模型。通过与试验结果进行对比,证明所建模型的有效性。随后探讨混凝土等级、连接件数量、连接件布置方式对夹心保温墙板抗剪承载力的影响。研究结果表明,提高混凝土等级能够提高部分夹心保温墙板在破坏阶段的承载力,但提升能力十分有限;连接件水平布置比垂直布置的墙板承载力略高;对于使用棒状及类似形状连接件的夹心保温墙板,增加连接件数量是最直接提高抗剪能力的方式。最后,分析了夹心保温墙板不同的失效模式及其计算方法。Fiber-reinforced material connectors are being used for sandwich insulation wall panels to prevent the occurrence of the"thermal bridge effect"between connectors and concrete.However,the shear resistance of fiber-reinforced material connectors is inferior to that of metal connectors.It is necessary to conduct a study on the shear performance of sandwich insulation wall panels using fiber-reinforced material connectors.In this paper,the finite element software ABAQUS is used to construct the appropriate constitutive models of concrete and connectors,and the numerical models of four different types of joints are established.The validity of the proposed models was confirmed by comparing them with experimental results.Subsequently,the influence of concrete grade,number of connectors,and the connector arrangement on the shear bearing capacity of sandwich insulation wall panels was investigated.The research findings indicate that increasing the concrete grade can enhance the bearing capacity of some sandwich insulation wall panels during the failure stage,but the improvement is limited.The bearing capacity of the sandwich insulation wall panels of the horizontally arranged connectors is slightly higher than that of the vertically arranged connectors.To enhance the shear resistance of sandwich insulation wall panels with rod-shaped or similar connectors,increasing the number of connectors is the most straightforward approach.

关 键 词：夹心保温墙板 GFRP连接件 有限元模拟 抗剪承载力 混凝土破坏承载力 

分 类 号：TU377[建筑科学—结构工程]