玻璃钢/复合材料Issue(2)：52-55,4.
FRP环向加固木柱轴心受压性能试验研究
EXPERIMENTAL STUDY ON AXIAL COMPRESSIVE BEHAVIOR OF TIMBER COLUMN LATERALLY STRENGTHENED WITH FRP
摘要
Abstract
The results of an experimental investigation concerning the compressive behavior of 15 cylindrical wood columns that are externally wrapped by FRP sheets are presented. The work mechanism and failure modes of the specimens were discussed in details. The parameters of the specimens are number and types of FRP sheets. The effect of design parameters of the specimens on the carrying capacity and peak strain of columns is analyzed. The results show that FRP can effectively improve the compressive bearing capacity and ductility of the wood column by strengthening it laterally. The load-strain curve of reinforced wood column is mainly linear before the ultimate load, and approaching to idealized plasticity post the ultimate load. The carrying capability and peak strain of strengthened timber columns increase along with the FRP sheet number. Capability and peak strain of timber columns wrapped laterally by three sheets of FRP are higher than those of unstrengthened columns by about 21. 82% and 94. 95% respectively. The ultimate load and axial strain of strengthened timber columns increase along with the elastic modulus of lateral FRP, but the trend becomes weaker. The lateral strengthening sheets are not fractured, and its hoop strain does not reach the ultimate strain, only about 10% of the later. The failure of the wood column begins with bending deformation of wood fiber. The main reason to improve the properties of wood column is that hoop FRP can restrict the deformation efficiently. The failure modes of all the specimens are characterized by alternate deformation and wrinkle.关键词
FRP/加固/木柱/极限荷载/峰值应变Key words
FRP/ strengthen/ wood column/ ultimate load/ peak strain分类
通用工业技术引用本文复制引用
邵劲松,刘伟庆,王国民,蒋桐..FRP环向加固木柱轴心受压性能试验研究[J].玻璃钢/复合材料,2012,(2):52-55,4.基金项目
江苏省自然科学基金(08KJB560001) （08KJB560001）
