摘要
对6根考虑二次受力的玻璃纤维布加固钢砼偏压柱的强度和变形特性进行了试验研究,探讨分析了二次受力的作用机理及其对加固柱加固效果的影响,指出滞后应变的大小是决定二次受力结构加固效果的关键因素,加固前应尽可能对结构进行卸载,但没有必要花费大量的人力、物力去完全卸载,只要卸载至原结构极限承载力的40%左右就能获得良好的加固效果。
The eccentric-compression intensity and distortion characteristics of the reinforced concrete columns wrapped with fiber reinforced plastics were studied.The interacted mechanization on preloading was discussed based on experimental research in this paper.The result showed the obvious influence of preloaded FRP confined eccentrically loaded reinforced concrete columns on strengthening effect.The magnitude of lag strain was the key factor in strengthening effect of structure in secondary load.So it should be unloaded as much as possible before strengthening and it is unnecessary to spend a large number of manpower and money to unload totally.A good result can be obtained by unloading up to 40%.
出处
《陕西理工学院学报（自然科学版）》
2010年第2期32-35,共4页
Journal of Shananxi University of Technology:Natural Science Edition
关键词
二次受力
玻璃纤维布
加固
钢筋混凝土偏压柱
preloading
GFRP
strengthening
eccentrically loaded reinforced concrete column
