(四川大学建筑与环境学院， 成都 610065)

［摘要］采用碳纤维布（CFRP）和芳纶纤维布（AFRP）加固8根方木柱，通过轴心抗压性能试验，研究了不同加固层数和FRP全包、环向、螺旋等不同加固方式对木柱抗压承载力的影响，分析了纤维复合材料加固木柱的失效机理、荷载-位移及荷载-应变关系。结果表明，经FRP加固后，受压木柱抗压承载力得到显著提高，最大提高幅度为57.5%；由于FRP的横向约束作用，木柱的延性得到有效改善，且不同的加固方式对木柱延性的提高幅度差别较大，其中全包加固方式下木柱延性的提高幅度最大，环向加固方式优于螺旋加固方式。

［关键词］纤维布; 木结构; 加固; 失效

中图分类号：TU366.2, TB332      文献标识码：A      文章编号：1002-848X(2014)09-0089-04

Failure behaviour of square timber columns confined by hoop and helix arrangements of FRP under axial compression

Liang Wei, Yuan Shucheng, Wang Qingyuan, Dong Jiangfeng

 (School of Architecture and Environment, Sichuan University, Chengdu 610065, China)

Abstract: Eight timber columns reinforced by CFRP and AFRP with various enwrapping forms were fabricated and studied. Based on the axial compressive test, the compressive bearing capacities of specimens with different FRP reinforcement layers and forms, including entire, hooped and spiral methods, were tested. And the damage form of specimens, the load-displacement relationship and the load-strain relationship were analyzed. Test results showed that the reinforcement with FRP can obviously improve the compressive bearing capacity of the columns and the highest improve ratio is 57.5%.In addition, the lateral deformations of reinforced specimen is greatly constrained by FRP, so the ductility can be improved. And different reinforcement methods can improve the ductility of timber columns on different level. The result indicated that the ductility of timber columns is enhanced more notably in the specimen with full wrapping arrangement, and the hooped reinforcement form is better than the spiral way.

Keywords: fiber reinforced plastic; timber structure; reinforcement; failure

*国家杰出青年基金资助项目(10925211)，教育部创新团队计划资助项目(IRT1027)。

作者简介：梁危,硕士研究生，Email: liangwei9090950@163.com。

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