秦国鹏^1,2，刘毅^1,2

（1 国家钢结构工程技术研究中心，北京 100088；2 中冶建筑研究总院有限公司，北京 100088）

 

[摘要] 采用配筋环氧砂浆板等强度置换木梁受损伤区域来修复旧木梁，以提高和改善其承载力与延性。采用有限元方法对GFRP筋修复木梁的抗弯性能进行分析模拟，并将荷载\|挠度计算曲线与相关试验进行对比，计算结果与试验吻合较好。基于有限元模型的正确性，进行了计算参数分析，讨论了木材强度、截面配筋率与配筋形式等主要参数对构件荷载\|挠度曲线的影响。根据平截面假定，采用极限强度法建立了相应的承载力计算公式，并与相关试验结果进行对比，计算结果与试验结果吻合较好。

[关键词] GFRP筋；加固修复；组合木梁；抗弯承载力；理论分析

中图分类号：TU366-2     文献标识码：A     文章编号：1002-848X(2012)12-0123-04

 

Qin Guopeng^1,2, Liu Yi^1,2

(1 National Research Center for Steel Construction, Beijing 100088, China; 2 Central Research Institute of Building and Construction of MCC Group, Beijing 100088, China)

 

Abstract: To enhance and improve the strength and ductility of timber beams, a new rehabilitation system was introduced, which consists of the replacement of the decayed parts by new ones of nearly the same material, connected to the sound parts by reinforced epoxy mortar plates. The FEA software was applied to simulate the bending behavior of the composite beam rehabilitated by reinforced epoxy mortar plate. The load-displacement curves were gained, which agree well with the relative test. Based on the accuracy of the finite element model, some main calculation parameters were discussed, including timber strength, bar ratio of cross section, bar types of cross section, etc.. Under the plane assumption, the ultimate strength capacity calculation formula was established, and the calculated results agree well with the experimental results.

Keywords: glass fiber reinforced plastics bar; retrofitting and recovery; composite timber beam; bending bearing capacity; theoretical analysis

作者简介：秦国鹏，博士，高级工程师，Email: qinguopengneu@hotmail.com

 

［1］ANT ONIO CARLOS RUIVO DUARTEL, JOAO HENRIQUE JORGE DE OLIVEIRA NEGRAO, HELENA MARIA PIRES CRUZ, et al. Bending strength of timber beams rehabilitated with reinforced epoxy mortar plates［J］. Journal of Structural Engineering, 2008, 134(5):792-800.

［2］许清风，朱雷. 内嵌CFRP筋维修加固老化损伤旧木梁的试验研究［J］. 土木工程学报，2009，42（3）：23-28.

［3］杨会峰，刘伟庆. 一种新型复合木梁的受弯性能研究［J］. 建筑结构，2010，40（1）：97-99.

［4］王全凤，李飞，陈浩军，等. 玄武岩纤维布加固木梁抗弯性能的试验研究与有限元分析［J］. 工业建筑，2010，40（4）：126-130.