- 摘 要
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趙樹紅 葉列平 （清華大學(xué)土木工程系 北京 100084）張 軻 岳清瑞 （國家工業(yè)建筑診斷與改造工程技術(shù)研究中心 北京 100088）
[提要] 根據(jù)6個碳纖維布加固混凝土柱和2個破壞后加固混凝土柱在反復(fù)荷載作用下抗震性能的試驗結(jié)果，分析了碳纖維布對混凝土的約束和增加延性的作用，提出了碳纖維布有效約束系數(shù)的概念，從而使得碳纖維加固混凝土柱的抗震設(shè)計可直接套用混凝土結(jié)構(gòu)的有關(guān)方法。
[關(guān)鍵詞] 碳纖維布 抗震加固 混凝土柱 延性 有效約束系數(shù)Eight specimens, including two strengthened after yielding to imitate strengthening with some damage and one strengthened under a sustained axial load to imitate strengthening under service, were tested under constant axial load and lateral cyclic load to investigated seismic performance of RC columns strengthened with carbon fiber reinforced polymer sheet ( CFRP sheet). The ductility increment with the confinement of CFRP sheet was studied. Based on the experimental results, an effective confinement factor of CFRP was suggested. Thus, the seismic design method of current code can be directly used in determining seismic strengthening amount of CFRP sheet for RC column.
Keywords: CFRP sheet; seismic strengthening; RC column; design method; effective confinement factor
