[1]曹万林,彭世阳,乔崎云,等.钢筋中强再生混凝土足尺梁徐变性能试验研究[J].自然灾害学报,2017,(03):001-8.[doi:10.13577/j.jnd.2017.0301]
 CAO Wanlin,PENG Shiyang,QIAO Qiyun,et al.Experimental study on creep behavior of recycled reinforced concrete beam[J].,2017,(03):001-8.[doi:10.13577/j.jnd.2017.0301]
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钢筋中强再生混凝土足尺梁徐变性能试验研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2017年03期
页码:
001-8
栏目:
出版日期:
2017-06-28

文章信息/Info

Title:
Experimental study on creep behavior of recycled reinforced concrete beam
作者:
曹万林12 彭世阳1 乔崎云1 林栋朝1 朱可睿1
1. 北京工业大学 城市与工程安全减灾教育部重点实验室, 北京 100124;
2. 北京工业大学 北京城市交通协同创新中心, 北京 100124
Author(s):
CAO Wanlin12 PENG Shiyang1 QIAO Qiyun1 LIN Dongzhao1 ZHU Kerui1
1. Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Ministry of Education, Beijing 100124, China;
2. Beijing Collaborative Innovation Center for Metropolitan Transportation, Beijing University of Technology, Beijing 100124, China
关键词:
中强再生混凝土足尺梁试件徐变性能试验研究挠度计算
Keywords:
medium strength recycled concretefull scale beam specimencreep performanceexperimental studydeflection calculation
分类号:
X37;TU375;P315-92
DOI:
10.13577/j.jnd.2017.0301
摘要:
为研究钢筋中强再生混凝土梁在长期荷载下的徐变性能,通过对再生粗骨料取代率为0%,33%,66%,100%的7根再生钢筋混凝土梁进行长期变形试验研究,分析了再生骨料取代率以及持荷水平对再生混凝土梁徐变的影响。梁截面尺寸为200 mm×300 mm,长3 300 mm,净跨3 000 mm;再生混凝土设计强度等级为C35-C45;试验已进行了275 d。研究表明:再生粗骨料混凝土梁徐变略大于普通混凝土梁,跨中刚度未受明显影响;再生混凝土梁挠度增大系数建议在普通混凝土梁挠度增大系数的基础上乘以1.1的修正系数。
Abstract:
To investigate the creep performance of reinforcement medium strength recycled concrete beam under long-term load, seven long-term deformation experimental study of concrete beams with recycled coarse aggregate replacement rates of 0%,33%,66%,100% were carried out. The influences of recycled coarse aggregate replacement rates and loading level on creep of beams were analyzed.The dimensions of the beam are as follows:the cross section is 200 mm×300 mm, the length is 3 300 mm and the span is 3 000 mm. The strength level of recycled concrete is C35-C45. The test has already continued for 275 days. The results show that the creep of recycled coarse aggregate concrete beams is slightly larger than that of ordinary concrete beam, and the recycled coarse aggregate has no significant impact on the mid-span stiffness. The deflection increasing coefficient of recycled concrete beam is suggested to multiply the correction factor 1.1 based on the deflection increasing coefficient of natural concrete beam.

参考文献/References:

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相似文献/References:

[1]曹万林,张洁,董宏英,等.中强再生混凝土楼板抗弯性能试验研究[J].自然灾害学报,2015,(03):112.[doi:10.13577/j.jnd.2015.0315]
 CAO Wanlin,ZHANG Jie,DONG Hongying,et al.Experimental research on moderate strength recycled aggregate concrete floor slabs[J].,2015,(03):112.[doi:10.13577/j.jnd.2015.0315]

备注/Memo

备注/Memo:
收稿日期:2016-09-13;改回日期:2017-01-12。
基金项目:国家自然科学基金重点资助项目(51438007)
作者简介:曹万林(1954-),男,教授,博士,主要从事工程结构抗震方面的研究.E-mail:wlcao@bjut.edu.cn
更新日期/Last Update: 1900-01-01