| 碳纤维加固病害RC梁的力学性能研究 |
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| 引用本文： | 何琦,夏红玲.碳纤维加固病害RC梁的力学性能研究[J].西部交通科技,2013(12):28-33. |
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| 作者姓名： | 何琦 夏红玲 |
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| 作者单位： | [1]重庆交通大学,重庆400074 [2]中国兵器长安工业,重庆401120 |
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| 摘 要： | 文章运用ANSYS软件，建立“实体一弹簧．壳”的有限元模型，对碳纤维板加固带有初始裂纹的纯弯曲病害钢筋混凝土梁（RC梁）的力学性能进行研究。结果表明：经碳纤维板加固后，病害RC梁的极限承载力、钢筋屈服荷载、开裂后的整体刚度均有明显提高，且碳纤维板越厚，加固效果越显著。此外还能有效抑制裂纹扩展、改善梁底受力状况，减小裂纹尖端应力强度因子，提高构件剩余疲劳寿命。
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| 关 键 词： | CFRP RC梁 裂纹 有限元 力学性能 应力强度因子 剩余疲劳寿命 |
Studies on Mechanical Properties of CFRP Reinforced Disease RC Beams |
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| HE Qi,XIA Hong-ling.Studies on Mechanical Properties of CFRP Reinforced Disease RC Beams[J].Western China Communication Science & Technology,2013(12):28-33. |
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| Authors: | HE Qi XIA Hong-ling |
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| Institution: | 1. Chongqing Jiaotong University, Chongqing, 400074;2. Chang＇an Industrial of China North Industries Group,Chongqing,401120) |
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| Abstract: | By using the ANSYS software, this article established the＂entity-spring-shell＂finite element model to study the mechanical properties of pure bending disease concrete beams （RC beams）reinforced by carbon fiber and with initial cracks.The results showed that： after the carbon fiber reinforcement, the disease RC beams were significantly improved in their ultimate bearing capacity, rebar yield load,and overall stiffness after cracking, and the thic- ker the carbon fiber plate, the more significant the reinforcement effect.In addition, it can ef- fectively inhibit the crack propagation, improve the force situation of beam bottom, reduce the crack tip stress intensity factor,and improve the residual fatigue life of components. |
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| Keywords: | CFRP RC beams Crack Finite element Mechanical properties Stress inten - sity factor Residual fatigue life |
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