[1]侯利军,陈达,徐世烺,等.无腹筋RUHTCC梁抗剪性能试验研究[J].东南大学学报(自然科学版),2014,44(1):133-139.[doi:10.3969/j.issn.1001-0505.2014.01.024]
　Hou Lijun,Chen Da,Xu Shilang,et al.Experimental investigation on shear responses of RUHTCC beams without stirrups[J].Journal of Southeast University (Natural Science Edition),2014,44(1):133-139.[doi:10.3969/j.issn.1001-0505.2014.01.024]
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无腹筋RUHTCC梁抗剪性能试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第1期
页码:
133-139
栏目:
土木工程
出版日期:
2014-01-18

文章信息/Info

Title:
Experimental investigation on shear responses of RUHTCC beams without stirrups
作者:
侯利军1; 陈达1; 徐世烺2; 张秀芳3
1河海大学海岸灾害与防护教育部重点实验室, 南京 210098; 2浙江大学建筑工程学院, 杭州 310058; 3大连理工大学建设工程学部, 大连 116024
Author(s):
Hou Lijun1;  Chen Da1;  Xu Shilang2;  Zhang Xiufang3
1Key Laboratory of Coastal Disaster and Defence of Ministry of Education, Hohai University, Nanjing 210098, China
2College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
3Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China
关键词:
超高韧性水泥基复合材料(UHTCC);  配筋率;  剪跨比;  裂缝扩展;  剪切强度
Keywords:
ultrahigh toughness cementitious composite(UHTCC);  reinforcement ratio;  shear-span ratio;  crack propagation;  shear strength
分类号:
TU317
DOI:
10.3969/j.issn.1001-0505.2014.01.024
摘要:
为了探究超高韧性水泥基复合材料(UHTCC)的抗剪性能,以配筋率和剪跨比为参数,对跨中荷载作用下的6根钢筋增强UHTCC(RUHTCC)梁和4根钢筋混凝土(RC)对比梁进行了受弯试验.对比研究了RUHTCC梁的抗剪性能,包括裂缝扩展形态、荷载-挠度曲线、剪切开裂荷载、极限剪切能力以及剪切强度等.试验结果表明,随着配筋率的增大和剪跨比的减小,RUHTCC梁的破坏模式由弯剪破坏转变为剪压破坏,极限剪切承载能力逐渐增大.RUHTCC梁的极限剪切能力约为RC梁的2倍,平均抗剪强度约为UHTCC抗拉强度的0.86倍;RUHTCC 梁表现出稳态的多条细密斜裂缝扩展模式,在正常使用极限状态下,其最大裂缝宽度低于0.1 mm.基于RUHTCC梁良好的裂缝控制能力以及较高的富余剪切承载能力,不需设置最小配箍率.
Abstract:
In order to understand the shear behavior of ultrahigh toughness cementitious composite(UHTCC), the bending tests on six reinforced UHTCC(RUHTCC)beams and four reinforced concrete(RC)comparison beams were performed under a concentrated loading at mid-span. The varied parameters were the shear-span ratio and the reinforcement ratio. The shear responses of the RUHTCC beams and those of the RC beams were compared, including the diagonal crack pattern, the load-deflection curve, the shear cracking load, the ultimate shear capacity and the shear strength, etc. The experimental results indicate that with the increase in the reinforcement ratio and the decrease in the shear-span ratio, the failure mode of the RUHTCC beams transforms from flexure-shear to shear-compression and the ultimate shear capacity rises gradually. The ultimate shear capacity of the RUHTCC beams is about twice that of the RC beams, and the average ultimate shear strength of the RUHTCC beams is about 0.86 times that of the ultimate tensile strength of the UHTCC. The RUHTCC beams present the stable propagation of multiple fine diagonal cracks, with the maximum crack width below 0.1 mm under the ultimate service condition. The minimum web reinforcement ratio is not required for the RUHTCC beams due to its large post-cracking reserve shear capacity and fine crack controlling capability.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2013-06-01.
作者简介: 侯利军(1981—),男,博士,讲师; 徐世烺(联系人),男,博士,教授,博士生导师,slxu@zju.edu.cn.
基金项目: 水利部公益性行业科研专项资助项目(201301052)、中央高校基本科研业务费资助项目(2013B03614)、浙江省重点科技创新团队资助项目(2010R50034).
引用本文: 侯利军,陈达,徐世烺,等.无腹筋RUHTCC梁抗剪性能试验研究[J].东南大学学报:自然科学版,2014,44(1):133-139. [doi:10.3969/j.issn.1001-0505.2014.01.024]
更新日期/Last Update: 2014-01-20