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(1 西安建筑科技大學(xué)土木工程學(xué)院，710055； 2 中國建筑西北設(shè)計研究院，西安710003)

［提要］采用CFRP布作為加固材料，對8根木柱進行了軸心抗壓試驗，分析了木柱加固前后的力學(xué)性能，包括木柱的破壞形態(tài)、木柱和碳纖維布的荷載-應(yīng)變關(guān)系以及加固柱極限承載力提高情況，并分析了加固柱極限承載力的影響因素。由試驗結(jié)果可以看出，木柱的破壞形態(tài)多樣，最容易在有缺陷的部位發(fā)生局部破壞；經(jīng)碳纖維布環(huán)箍約束后，木柱抗壓強度有明顯的提高，提高幅度約在10%～20%之間；木材自身強度、木柱的缺陷、受力方式、碳纖維布間距及碳纖維布層數(shù)對加固柱極限承載力均有影響。

［關(guān)鍵詞］碳纖維布；木柱；加固；軸心受壓

Experimental Study on Axial Compressive Behaviors for Timber Column Strengthened with CFRP Sheets/Xie Qifang1,Zhao Hongtie1,Ge Hongpeng2,Xue Jianyang1,Wang Kun1(1 School of Civil Eng.,Xi"an Univ. of Arch. & Tech., Xi"an 710055, China； 2 China Northwest Building Design Research Institute, Xi"an 710003, China)

Abstract:Eight timber columns strengthened with CFRP sheets with various enwrapping forms are studied under axial compression.The mechanical properties of unreinforced and reinforced columns are analyzed such as failure modes,loadstrain relationships of timber columns and CFRP sheets,the bearing capacity and its influences of strengthened columns.The results indicate that the failure modes are various and local failure is often occurred at the position with flaws.The compression strength of strengthened timber columns is higher than that of unreinforced columns with an amplitude of 10%～20%.Such factors as the compression strength of timber,flaws of timber columns,stress modes,enwrapping forms of CFRP sheets are influenced the bearing capacity of strengthened columns.

Keywords:CFRP sheet; timber column; strengthening; axial compressive