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CFRP布包镶加固底部糟朽木柱轴压试验 被引量:15

Axial Compression Experiments on Timber Columns Strengthened with CFRP Sheets on Decay Roots by Coating Reinforcing Technique
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摘要 为探讨适用于糟朽柱根的有效加固方法,提出了采取CFRP布代替铁箍来包镶加固古建木柱柱根的方法.制作了6个模型,其中部分模型考虑柱根糟朽,并采用CFRP布进行包镶加固.采取静力加载试验方法,研究了CFRP布包镶加固前后木柱的轴压受力性能.基于试验结果,获得了木柱的力-变形曲线、力-应变曲线、极限承载力及延性性能,讨论了CFRP布包镶层数对加固效果的影响.结果表明,采用CFRP布包镶加固柱根后,木柱极限承载力可恢复81.4%~92.4%左右,延性性能恢复87.3%~95.8%左右,水平及竖向峰值压应变均有不同程度提高.当CFRP布包镶层数为3层时,木柱柱根加固效果最明显,但加固后的木柱承载性能略低于完好木柱. To find out a more effective strengthening method for timber column with decay root, CFRP (Carbon Fibre Reinforced Plastic) sheet was employed to replace iron band in coating reinforcement technique. Six specimens were manufactured built, some of which had decay roots and strengthened by CFRP sheets using coating technique. Axial compression experiments were carried out to investigate the response of these six columns. The load-displacement relationships, load-strain relationships, ultimate compressive strength and ductility of the specimens were obtained to evaluate the strengthening effects. The influence of layer numbers of CFRP sheets was also discussed. The results showed that the ultimate compression strength and ductility of the strengthened columns were recovered to about 81.4% to 92.4% and 87.3% to 95.8% of those of the intact column, respectively. The peak compressive strain of the strengthened columns was also improved in both horizontal and vertical directions. The column strengthened by 3 layers of CFRP sheets exhibited better compressive performances than those of other strengthened columns, but still lower than that of the intact one.
出处 《湖南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2016年第3期120-126,共7页 Journal of Hunan University:Natural Sciences
基金 国家自然科学基金资助项目(51278013) 北京市博士后工作经费资助项目(2013ZZ-04) 故宫博物院科研基金资助项目(KT2012-7)~~
关键词 木柱柱根 包镶加固 CFRP布 轴心受压 试验 timber column root coating reinforcement CFRP sheets axial compression experiments
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