纤维增强复材混合芯层夹芯板受弯性能试验研究  

EXPERIMENTAL RESEARCH ON FLEXURAL BEHAVIOR OF FRP SANDWICH PANELS WITH HYBRID CORE

作　　者：罗熠民 郑毅 李荣[1] LUO Yimin;ZHENG Yi;LI Rong(Central Research Institute of Building and Construction Co.,Ltd.,MCC Group,Beijing 100088,China;China Jingye Engineering Co.,Ltd.,Beijing 100088,China)

机构地区：[1]中冶建筑研究总院有限公司,北京100088 [2]中国京冶工程技术有限公司,北京100088

出　　处：《工业建筑》2020年第3期167-171,166,共6页Industrial Construction

基　　金：中冶建筑研究总院重大课题(JAA2018kj01)。

摘　　要：纤维增强复材(FRP)夹芯体系具有质量轻、强度高、使用寿命长的优点,可使用混合芯层体系来制造性能更优的夹芯复合材料。采用真空辅助成型工艺,制备了腹板-酚醛泡沫混合芯层的纤维增强复材夹芯板玻璃纤维(GFRP)。对3种不同芯层配置的试件开展四点弯曲试验,研究纤维增强复材夹芯板的弯曲性能和破坏模式。试验结果表明:试件的破坏模式可分为腹板与面层剥离破坏和腹板屈曲破坏;增加中部纵向腹板能提高板件的抗弯承载力;增加横向腹板能降低板件的损坏程度。采用铁木辛柯梁理论,考虑弯曲和剪切变形的共同影响,分析了板的跨中挠度;考虑混合芯层中组成成分对剪切性能的贡献,预测了板件的极限承载力,两者的理论计算值与实测值均吻合较好。Fiber-reinforced polymer (FRP) composite sandwich systems has the advantages of light weight,high strength,and long service life. Hybrid core systems were used to manufacture sandwich composites with higher performance. FRP composite sandwich panels with GFRP web-phenolic foam core systems were manufactured by vacuum-assisted molding process. Four-point bending tests were performed on three specimens with different core layers to study the bending properties and failure modes of FRP composite sandwich panels. The test results showed that the failure mode was shear failure,which was manifested in the form of peeling failure of web and surface layer,and buckling failure of web. Increasing the longitudinal web in the middle could significantly improve the bending capacity of the panel;increasing the transverse web could significantly control the damage degree of the panel. Using Timoshenko beam theory,considering the combined effects of bending and shear deformation,the mid-span deflection was analyzed;considering the contribution of the components in the hybrid core layer to the shear capacity,the ultimate bearing capacity was predicted,and the values agreed well with the measured values.

关 键 词：纤维增强复材夹芯板 腹板-泡沫混合芯层 受弯性能 跨中挠度 承载力 

分 类 号：TU599[建筑科学—建筑技术科学]