期刊论文

Experiment of flexural behavior of an existing RC beam reinforced by self-compacting concrete under different continuous loading

中文

长安大学学报(自然科学版)

1671-8879

2019

39

4

62-72

10.19721/j.cnki.1671-8879.2019.04.008

2015CB057706:国家重点基础研究发展计划（973计划） 51708477:国家自然科学基金 15B015:湖南省教育厅科学研究项目 17C1539:湖南省教育厅科学研究项目 201422:湖南省交通科技项目

本校为第一机构

针对自密实混凝土加固既有混凝土桥梁时结构初始损伤和持荷加固等对加固梁抗弯性能的影响,设计和制作了8片钢筋混凝土T梁,对其进行加载造成初始损伤,然后在不同持荷水平下对其进行自密实混凝土增大截面加固,并对加固梁进行抗弯性能测试,以明确持荷水平和自密实混凝土加固厚度对RC梁抗弯性能的影响,包括构件裂缝分布形态、破坏形式、挠度变形和混凝土应变发展等,最后探讨了加固梁抗弯承载力计算方法。研究结果表明:该试验采用的自密实混凝土增大截面加固方法能有效提高构件的抗弯刚度,增大抗弯承载力约1倍,并且加固梁均表现出良好的延性破坏特征;混凝土梁底加固厚度能在一定程度上提高构件抗弯承...

To investigate the effects of initial damage and sustained load on the flexural behavior of structures strengthened using the enlarge section method with self-compacting concrete, eight reinforcement concrete T beams were designed and constructed. These beams were first loaded to simulate the initial damage. Then, they were strengthened using the enlarge section method with self-compacting concrete under different sustained loads. Thereafter, the beams were tested under a flexural load to investigate the effects of sustained load and the streng...