建筑结构学报2025，Vol.46Issue(2)：59-71,13.DOI:10.14006/j.jzjgxb.2024.0024
复合加固方形中长木柱轴压性能研究
Axial compression performance of composite strengthened square medium-long timber columns
摘要
Abstract
In order to study the axial compression mechanical properties and improve the theory of square medium-long timber columns strengthened with near surface mounted steel bars and wrapped carbon fiber reinforced polymer(CFRP)strips,the axial compression performance of composite strengthened timber columns was studied through experimental research,theoretical analysis and numerical simulation in this paper.In the experimental study,axial compression tests were carried out on eight timber columns with different strengthening forms,using the number of embedded steel bars,the amount and wrapped ways of CFRP strips as parameter variables.The failure characteristics,load-displacement curves,and load-strain curves of specimens were analyzed,and the test results were compared with those of the composite strengthened square short timber columns.Experimental results show that the load bearing capacity of the composite strengthened square medium-long timber columns increases by 14.12％to 67.05％compared with un-strengthened timber columns.Meanwhile,a finite element numerical analysis model was established using ABAQUS software.On the basis of the varified model,the influences of the slenderness ratio of specimens,the reinforcement ratio of the section,and the spacing width of CFRP strips on the reinforcement effect were studied.The analysis reveals that the load bearing capacity of the composite strengthened timber columns gradually decreases with the increase of the slenderness ratio and significantly decreases when the slenderness ratio is greater than 70.When the reinforcement ratio is around 2.5％and the width of the CFRP strips and the spacing are both 150 mm,the mechanical performance of composite strengthened square medium-long timber columns is the best.关键词
方形中长柱/复合加固/内嵌钢筋/外包碳纤维布/稳定系数/静力试验/有限元分析/轴压性能Key words
square medium-long column/composite strengthening/near surface mounted steel bars/wrapped carbon fiber reinforced polymer strips/stability coefficient/static test/finite element analysis/axial compression performance分类
土木建筑引用本文复制引用
周长东,罗廷惜,苏宝强,郑玉槟..复合加固方形中长木柱轴压性能研究[J].建筑结构学报,2025,46(2):59-71,13.基金项目
国家自然科学基金项目(52078030,51678039). （52078030,51678039）
