中南大学学报（自然科学版）2011，Vol.42Issue(2)：456-462,7.
既有钢筋混凝土л梁正截面抗弯承载力研究
Flexural bearing capacity of existing reinforced concrete л beams
摘要
Abstract
On the basis of the incorrectness of the plane-section assumption, reinforced concrete Ⅱ beams was taken as the research object and the variation law of thc bearing capacity of beams was established with different corrosion rates.By constructing the new deformation compatibility, the calculation formula of the compression depth of existing reinforced concrete Ⅱ beams varying with corrosion rate was presented, and the calculation formula of normal section capacity of existing reinforced concrete Ⅱ beams was derivered.Based on these analyses, the presented formula verifies the calculation formula of the flexural capacity using thc experimental data for perimeters of material quality and damage loads obtained from a real bridge that served for about 40 years.Thc results indicate that the computational results of the calculation formula are in good agreement with thc experimental results, which shows that the calculation formula of flexural capacity is effective and can be applied in engineering practice.关键词
钢筋混凝土梁/锈蚀/抗弯承载力/受压区高度分类
交通工程引用本文复制引用
吕毅刚,张建仁,彭晖,张克波..既有钢筋混凝土л梁正截面抗弯承载力研究[J].中南大学学报（自然科学版）,2011,42(2):456-462,7.基金项目
国家自然科学基金资助项目(50478032) （50478032）
交通部西部交通建设科技项目[2006 318 223 02_08] （）
