RC框架节点柱端碳纤维加固强柱弱梁效果  

Research on Strong Column and Weak Beam Efficiency for Reinforced Concrete Frame Joint Retrofitted with Hybridized CFRP

作　　者：郝泽静[1] 王兴国[1] 宋珂[1] 葛楠[1] 

机构地区：[1]河北联合大学河北省地震工程研究中心,河北唐山063009

出　　处：《河北联合大学学报（自然科学版）》2012年第1期84-89,共6页Journal of Hebei Polytechnic University:Social Science Edition

基　　金：国家自然科学基金项目(51078124)

摘　　要：利用有限元软件ANSYS对现浇钢筋混凝土框架节点做了拟静力分析。对普通梁柱节点和柱端用碳纤维加固节点的计算结果进行了对比。结果表明,随着加载位移的增加,梁肋附近楼板钢筋应力有明显增加,说明楼板对梁的抗弯能力有增强的作用。在柱端粘贴碳纤维之后,柱端承载力明显提高,柱受力主筋屈服时间明显延后,梁端首先出现塑性铰,使节点在受到地震作用破坏时更接近梁铰机制的破坏特点。A numerical quasi-static model was established with ANSYS software for beam-column interior joint on a reinforced concrete frame. The results for traditional joint specified in design code and that for the joint retrofitted with hybridized CFRP were compared. It is shown that stress in the reinforce bar for slab close to beam will increase significantly with the applied top displacement in horizontal direction, but slightly for far from the beam. It is also shown that for the joint retrofitted with hybridized CFRP, the yielding time of column reinforce bar will shift to a later time,while the number of cracks on beams becomes larger, which tend to exhibit a failure type closer to the beam-pivot or ductile mode.

关 键 词：框架节点 拟静力 塑性铰 钢筋应力 碳纤维 

分 类 号：TU311.41[建筑科学—结构工程]