碳纤维布加固钢筋混凝土T形梁的抗弯承载力
Calculation and Analysis on Flexural Strength of Reinforced ConcreteT-beam Strengthened with CFRP Sheets
作者：李棠(西南科技大学 土木与建筑工程学院，四川 绵阳 621010)；张祁(重庆市设计院,重庆 410000)；王清远(四川大学 建筑与环境学院,四川 成都 610065)
Author：(College of Civil and Architecture Eng. of Southwest Univ. of Sci. and Technol., Mianyang, 621010, China)；(Chongqing Inst. of Design, Chongqing 400015，China)；(School of Architecture and Environment,Sichuan Univ., Chengdu 610065，China)
收稿日期：2006-10-23 年卷（期）页码：2009,41(2):85-90
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：碳纤维布；钢筋混凝土;T形梁；结构加固；正截面抗弯承载力
Key words：CFRP sheets;RC-T-beam；structure strengthening；flexural strength of normal section
基金项目：国家自然科学基金资助项目(10602048)
中文摘要
针对碳纤维布（CFRP）在加固领域内的广泛应用与目前国家规范中碳纤维加固T型梁理论空缺的矛盾，以梁的平截面假定为基础，研究了CFRP加固T型截面钢筋混凝土梁的弯曲破坏问题。对两种类型的CFRP加固T型截面梁，讨论了其不同的极限破坏形态，提出了相应的抗弯承载力的实用计算公式，弥补了规范中的不足。并研究了配筋特征值、加固特征值等影响CFRP加固承载力的主要因素，得出了在CFRP加固T型梁设计中的关键问题是正确界定梁的正截面极限承载力，确定梁的最后破坏形态，避免梁发生脆性破坏的结论。最后指出U形箍锚固是一种便捷有效的附加锚固方式，可以提高加固的承载力，并给出了具体的设计算例，该理论对工程的应用具有一定的参考价值。
英文摘要
The bending failure of the RC-T-beam strengthened with Carbon Fiber Reinforced Polymer（CFRP） was studied in this paper. The various ultimate failure morphologies of two types of RC-T-beam strengthened with CFRP were discussed and analyzed, while the corresponding practical formula on bearing capacity were put forward. The major factor on the flexural strength of the beam with CFRP strengthening were discussed and the essential issue about the design of the beam was pointed out. Finally, it was pointed out that U type hoop on reinforcement is convenient and effective. This sub reinforcement style could improve the bearing capacity of the strengthened beam. The design example of the strengthened RC T beam was shown. The theory proposed in this article is ready to serve as a helpful reference for engineering application.
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