| 钢绞线网片-聚合物砂浆加固钢筋混凝土箱梁试验 |
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| 引用本文： | 郭彤,李爱群,姚秋来,宋永生,刘洋.钢绞线网片-聚合物砂浆加固钢筋混凝土箱梁试验[J].中国公路学报,2010(2). |
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| 作者姓名： | 郭彤 李爱群 姚秋来 宋永生 刘洋 |
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| 作者单位： | 东南大学混凝土及预应力混凝土结构教育部重点实验室;重庆交通大学桥梁结构工程交通行业重点实验室;中国建筑科学研究院工程抗震研究所; |
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| 基金项目： | 国家自然科学基金项目(50608017); 桥梁结构工程交通行业重点实验室开放基金项目(CQSLBF-Y09-2); 东南大学优秀青年教师资助计划项目 |
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| 摘 要： | 为探讨钢绞线网片-聚合物砂浆加固技术在桥梁加固中的可行性,开展了钢筋混凝土箱梁的加固试验研究。通过3根薄壁箱梁缩尺试件的纯弯加载试验,检验了该技术的加固效果,并对试件的位移、应变、裂缝扩展及破坏特征进行了比较和分析;研究了桥梁箱梁加固和建筑结构矩形梁加固的差异,对钢绞线网片-聚合物砂浆用于混凝土箱梁桥的加固提出了建议。结果表明:加固措施显著增大了箱梁的刚度,起到了抑制裂缝开展、提高屈服荷载和极限荷载的作用;加载过程中,箱梁的应变分布存在明显的剪力滞效应,加固梁的破坏始自剪弯区U型箍内侧砂浆面层的拉裂,并受到腹板弯剪裂缝萌生、扩展的影响;加固梁的最终破坏形态为砂浆-混凝土界面的剥离破坏,而钢绞线未被拉断,受压区混凝土也未出现压溃现象。
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| 关 键 词： | 桥梁工程 钢筋混凝土箱梁 试验研究 钢绞线网片 聚合物砂浆 加固 |
Experiment on Reinforced Concrete Box-girder Strengthened by Steel Stranded Wire Mesh and Polymer Mortar |
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| GUO Tong,LI Ai-qun,YAO Qiu-lai,SONG Yong-sheng,LIU Yang.Experiment on Reinforced Concrete Box-girder Strengthened by Steel Stranded Wire Mesh and Polymer Mortar[J].China Journal of Highway and Transport,2010(2). |
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| Authors: | GUO Tong LI Ai-qun YAO Qiu-lai SONG Yong-sheng LIU Yang |
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| Institution: | GUO Tong1,2,LI Ai-qun1,YAO Qiu-lai3,SONG Yong-sheng1,LIU Yang1 (1.Key Laboratory of Concrete , Prestressed Concrete Structure,Ministry of Education,Southeast University,Nanjing 210096,Jiangsu,China,2.Key Laboratory of Bridge-structure Engineering,Ministry of Communications,PRC,Chongqing Jiaotong University,Chongqing 400074,3.Institute of Earthquake Engineering,China Academy of Building Research,Beijing 100037,China) |
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| Abstract: | In order to investigate the feasibility of steel stranded wire mesh and polymer mortar(SMPM) in the strengthening of bridge structures,experimental study of the reinforced concrete box-girders was carried out.The strengthening effect was verified through the bending tests on three scaled thin-walled box-girder specimens.Comparison and analysis were made on the displacements,strains,crack propagation and failure characteristics.Differences of strengthening of bridge box-girders and rectangular beams in build... |
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| Keywords: | bridge engineering reinforced concrete box-girder experimental research steel stranded wire mesh polymer mortar strengthening |
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