泡桐木芯材夹层梁抗弯性能试验研究.pdfVIP

学兔兔 42 江苏建筑 2014年第2期(总第 161期) 泡桐木芯材夹层梁抗弯性能试验研究 周翔，韩丽婷，董星亮 (南京-r~l,大学土木工程学院，江苏南京210009) 『摘 要1 试验研究了复合材料泡桐木芯材夹层梁抗弯性能，考察了试验构件的破坏模式、荷栽一位移曲线、抗弯承栽力及 受弯段的应变发展规律；开展试验构件抗弯承栽力的有限元模拟，试验结果与有限元分析结果吻合较好，验证有限元模拟分 析可行。基于试验及有限元分析可知：整个加栽过程中复合材料泡桐木芯材夹层梁表现为线弹性受力，最后破坏发生脆性破 坏：受弯承栽力计算可以近似采用平截面假定 文章可供轻木芯材复合材料夹层结构的抗弯设计参考。 『关键词] 复合材料夹层结构；泡桐木芯材；抗弯性能；ate．模式 『中图分类号]TU312．1 『文献标识码1A 『文章编号]1oo5—6270(2014)02—0042一o3 Test Study on Bending Performance of Paulownia Core Sandwich Beams ZHOU Xiang HAN Li-ting DONG Xing-liang (College of Civil Engineering，Nanjing University of Technology，Nanjing Jiangsu 210009 China) Abstract：Bending performance of composite paulownia core sandwich beams was studied by tests．The failure modes，load-deformation curves，bending capacities and strain-developing behavior were investigated．Th e finite element analysis(FEA)of test specimens were carried out，and the FEA results had a good agreement with these of test．It was verified that the FEA was reliable．Based on the test and FEA，it could be concluded that paulownia core sandwich beams shown the linear elastic behavior during the whole process loading，and lastly brittle failure happened．The plane cross-section assumption could be used for the calculation of its bending capacity．This paper could be referred for the calculation of bending capacity for the paulownia core sandwich boards／beams． Key words：composite sandwich structure，paulownia core；bending capacity；failure mode 复合材料夹层结构由强度高厚度薄的面板和轻质芯材 组成，具有质量轻，比强度、比刚度高的优点。尤其是具有良 好的抗弯性能