格构腹板增强泡桐木夹芯复材板的弯曲性能试验.PDFVIP

格构腹板增强泡桐木夹芯复材板的弯曲性能试验* 王 跃 方 海 刘伟庆 齐玉军 ( ， 211816) 南京工业大学土木工程学院 南京 : ， 。 摘 要 采用真空导入工艺 制备了格构腹板增强泡桐木夹芯复材板 对不同格构腹板厚度和不同腹板 ， 、 。 : 间距的试件进行四点弯曲试验 研究其破坏模式 跨中应变和跨中挠度情况 试验结果表明 增加腹板厚度 ， ; 能有效提高夹芯板的极限承载力 提高幅度随腹板厚度的增加而减小 减小格构腹板间距也能提高夹芯板的 ， 。 ， 极限承载力 提高幅度随格构腹板间距的减小而减小 采用铁木辛柯梁理论 考虑弯曲和剪切变形的共同影 ， ; ， 响 推导出板材跨中挠度计算式 采用经典夹芯梁理论预估了试件的受弯极限承载力 挠度和承载力的理论 值与实测值均吻合较好。 : ; ; ; 关键词 格构腹板 夹芯板 跨中挠度 弯曲性能 DOI :10. 13204 /j． gyjz201708031 EXPEＲIMENTAL ＲESEAＲCH ON THE FLEXUＲAL PＲOPEＲTIES OF PAULOWNIA WOOD COＲE COMPOSITE SANDWICH PANEL ＲEINFOＲCED BY LATTICE WEBS WANG Yue FANG Hai LIU Weiqing QI Yujun (College of Civil Engineering ，Nanjing Tech University ，Nanjing 211816 ，China) Abstract :Paulownia wood core composite sandwich panels reinforced by lattice webs were manufactured by vacuum infusion molding process． The specimens with different spaces between adjoining webs and web thicknesses were experimentally studied by four-point bending test． The failure modes ，the distribution of strain and the mid-span deflection could be analyzed． It was concluded that the ultimate bearing capacity could be improved by increasing web thickness ，the rate of improving was reduced along with increasing web thickness ;the ultimate bearing capacity could also be improved by reducing web distance ，the rate of improving was