混杂纤维布加固木梁受弯性能研究  

Study on Flexural Behavior of Timber Beams Strengthened with Hybrid Fiber Sheets

作　　者：李盼 淳庆[1] 张承文 王浩宇 曹光 董清崇 LI Pan;CHUN Qing;ZHANG Chengwen;WANG Haoyu;CAO Guang;DONG Qingchong(School of Architecture,Southeast University,Nanjing 210096,China;China Construction First Group Corporation Limited,Beijing 100161,China)

机构地区：[1]东南大学建筑学院,江苏南京210096 [2]中国建筑一局(集团)有限公司,北京100161基金项目:

出　　处：《应用基础与工程科学学报》2023年第4期1018-1031,共14页Journal of Basic Science and Engineering

基　　金：国家自然科学基金项目(51778122);中建股份科技研发课题(CSCEC-2021-Z-36)。

摘　　要：混杂纤维布加固木结构具有施工简便、增强显著且不改变构件原有尺寸等优点,但同样存在理论计算困难、无法准确评估等问题.为了研究混杂纤维布加固木梁的受弯性能,首先考虑木材节疤作用,结合Hashin失效准则、Hill屈服准则和损伤力学等原理,提出了一种基于弹塑性损伤本构模型的混杂纤维布加固木结构的有限元模拟方法;然后选取性能较优的单向编织混杂纤维布加固木梁进行试验研究,并将试验结果与有限元模拟分析结果进行对比,研究结果表明,提出的有限元模拟方法能够较好地模拟木材和混杂纤维布两种材料的非线性行为,试验结果也验证了有限元模拟方法的准确性.该研究结果可以为混杂纤维布加固木结构构件的计算评估提供科学依据.The hybrid fiber strengthening method for timber structure has the advantages of easy construction,good performance and retaining the original size of components,but there are also some problems such as difficulty in theoretical calculation and inaccurate mechanical evaluation.Therefore,in order to analyze the flexural behavior of timber beams strengthened with hybrid fiber sheets,this paper presents a finite element simulation method based on the elastic-plastic damage constitutive model.The effect of wood scar,and the principles of Hashin failure criterion,Hill yield criterion and damage mechanics are considered in the method.Then,the timber beam strengthened with one-way braided hybrid fiber sheet is selected for experimental study,and the experimental results are compared with the results of finite element simulation analysis.The results show that the method can simulate the nonlinear behavior of the two materials well.The accuracy of the simulation method is verified by the experimental results.The research results can provide a scientific basis for the calculation and evaluation of hybrid fiber reinforced timber members.

关 键 词：混杂纤维布 加固 木梁 有限元 弹塑性损伤 木节疤 

分 类 号：TU366.2[建筑科学—结构工程]