CFRP布持载加固高强混凝土偏压柱受力性能  

Mechanical Behaviors of High-strength Concrete Columns Strengthened with CFRP Sheets Under Sustained Eccentric

作　　者：王吉忠[1] 赵玉杰[1] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116024

出　　处：《建筑科学与工程学报》2011年第1期20-26,共7页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金项目(50878035)

摘　　要：为了检验碳纤维增强复合材料(CFRP)布持载加固高强混凝土偏压柱的有效性,对8根CFRP布加固高强混凝土方柱进行了持载偏心受压试验,研究了持载加固后高强混凝土方柱在不同偏心距、加固方式及持载水平作用下的破坏特征和受力性能,并对外包CFRP布的横向应变、柱截面应变、侧向挠度以及极限承载力进行了分析。结果表明:CFRP布持载加固高强混凝土偏压柱是有明显效果的,其承载力和延性都有了一定程度的提高;随着偏心距和持载值的增大,加固效果逐渐减弱,CFRP布用量的减小也会使加固效果减弱。An experimental study of eight sustained loaded eccentric high-strength concrete columns strengthened with carbon fiber reinforced polymer（CFRP） sheets was carried out for testing the efficiency of the reinforcement approach.The failure characteristics and mechanical behaviors were investigated in the test of eight high-strength concrete square columns strengthened with CFRP sheets under different eccentricities,strengthening modes and sustained loaded levels.Finally,transverse strain,sectional strain distribution of concrete column,lateral deflection,as well as ultimate load bearing capacity in the CFRP sheets were analyzed.The results indicate that the effect of sustained loaded eccentric high-strength concrete columns strengthened with CFRP sheets is obvious,the ultimate load bearing capacity of concrete columns is enhanced and the ductility of concrete columns is improved.The efficiency of reinforcement decreases when the eccentricity and the sustained loaded value increase.Decreasing the usage amount of CFRP sheets also decreases the efficiency of reinforcement.

关 键 词：高强混凝土柱 碳纤维增强复合材料布 偏心受压 承载力 延性 

分 类 号：TU375.3[建筑科学—结构工程]