| CFRP加固钢筋混凝土薄壁箱梁抗弯极限承载力计算 |
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| 引用本文： | 李长召,吴亚平,徐金帅,刘建新.CFRP加固钢筋混凝土薄壁箱梁抗弯极限承载力计算[J].兰州理工大学学报,2008,34(2):128-132. |
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| 作者姓名： | 李长召 吴亚平 徐金帅 刘建新 |
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| 作者单位： | 1. 兰州交通大学,土木工程学院,甘肃,兰州,730070
2. 上海师范大学建筑工程学院,上海,201418 |
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| 基金项目： | 国家自然科学基金
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甘肃省自然科学基金 |
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| 摘 要： | 根据混凝土构件中各种材料的应力-应变关系及变形协调原理,讨论考虑初始应变的钢筋混凝土薄壁箱梁外贴碳纤维增强材料(CFRP)抗弯加固后的破坏形态.基于平截面假定和规程推荐的材料应力-应变关系,分析加固梁弯曲破坏时的极限状态,提出相应的极限承载力计算公式和极限破坏发生条件.
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| 关 键 词： | 钢筋混凝土薄壁箱梁 加固 CFRP 初始应变 抗弯极限承载力 |
| 文章编号： | 1673-5196(2008)02-0128-05 |
| 修稿时间： | 2007年4月19日 |
Evaluation of ultimate bearing capacity of bending of CFRP-strengthened thin-walled RC box-beam |
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| LI Chang-zhao,WU Ya-ping,XU Jin-shuai,LIU Jian-xin.Evaluation of ultimate bearing capacity of bending of CFRP-strengthened thin-walled RC box-beam[J].Journal of Lanzhou University of Technology,2008,34(2):128-132. |
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| Authors: | LI Chang-zhao WU Ya-ping XU Jin-shuai LIU Jian-xin |
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| Abstract: | The failure mode of thin-walled RC box-beams with externally bound carbon fiber reinforcing plastics for bending reinforcement was discussed on the basis of the stress-strain relationship of a variety of materials for concrete components,principle of consistent deformation,and consideration of initial strain of the beam.The ultimate condition of bending failure of the reinforced beam was analyzed on the basis of the presumption of planar sections and stress-strain relationship of materials recommended by their rules.Meantime,the corresponding evaluation formula of ultimate bearing capacity and the conditions of ultimate failure occurence were presented,also. |
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| Keywords: | thin-walled reinforced concrete box-beam reinforcement CFRP initial strain ultimate bearing capacity of bending |
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