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直接剪切型锚栓钢板加固混凝土梁的抗弯承载力试验研究
全学友1,2,邓扬1,2,刘辉3,张鹏4,刘宝1,2,刘连杰1,2
摘 要

(1 重庆大学土木工程学院, 重庆 400045; 2 山地城镇建设与新技术教育部重点实验室(重庆大学), 重庆 400045;  3 成都基准方中建筑设计有限公司重庆分公司, 重庆 401120; 4 中冶赛迪工程技术股份有限公司, 重庆 401122)

[摘要]首次提出了直接剪切型锚栓钢板加固体系的概念,其技术特征在于可以消除锚栓杆与钢板安装孔壁之间的间隙,最大限度保证群锚的协同受力。完成了4根钢筋混凝土试件抗弯承载力的对比试验。试验结果表明,所有加固试件的锚栓均未出现剪断现象,钢板受拉屈服,与对比试件相比受弯承载力提高120%,且加固试件具有良好的延性。

[关键词]直接剪切型锚栓钢板; 加固; 受弯承载力

中图分类号:TU398文献标识码:A文章编号:1002-848X(2018)18-0088-05

 

Experimental study on flexural capacity of concrete beams strengthened by direct-shear-bolted steel plate

Quan Xueyou1,2, Deng Yang1,2, Liu Hui3, Zhang Peng4, Liu Bao1,2, Liu Lianjie1,2

(1 School of Civil Engineering, Chongqing University,Chongqing 400045, China; 2 Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, China; 3 Chongqing Branch, Chengdu FZFZ Architectural Design Co.,  Ltd.,  Chongqing 401120, China;  4 CISDI Engineering Co.,  Ltd.,  Chongqing 401122, China)

Abstract:The concept of direct-shear-bolted steel plate strengthening system is initially proposed, in which the usually existed clearance between bolt shaft and the sidewall of hole on steel plate for installing anchors is eliminated, so that the compatibility of anchor group is secured to the extreme extent. A comparative test series of flexural capacity which consists of four reinforced concrete beam specimens was carried out. The test results show that bolts  hadn′t been fractured for all strengthened specimens, tension steel plates had been yielded, flexural capacities of all strengthened specimens had been increased 120% compared with the contrast specimen, and excellent ductility for all strengthened specimens had been achieved.

Keywords:direct-shear-bolted steel plate; strengthen; flexural capacity

 

作者简介:全学友,博士,教授,博士生导师,Email:quanxueyou@163.com。

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