[1]胡翱翔,梁兴文,史庆轩,等.高强钢筋与超高性能混凝土黏结性能试验研究[J].西安建筑科技大学学报(自然科学版),2021,53(04):534-544.[doi:10.15986/j.1006-7930.2021.04.010]
 HU Aoxiang,LIANG Xingwen,SHI Qingxuan,et al.Bond characteristics between high strength bars and ultra-high performance concrete[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2021,53(04):534-544.[doi:10.15986/j.1006-7930.2021.04.010]
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高强钢筋与超高性能混凝土黏结性能试验研究()
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西安建筑科技大学学报(自然科学版)[ISSN:1006-7930/CN:61-1295/TU]

卷:
53
期数:
2021年04期
页码:
534-544
栏目:
出版日期:
2021-08-28

文章信息/Info

Title:
Bond characteristics between high strength bars and ultra-high performance concrete
文章编号:
1006-7930(2021)04-0534-11
作者:
胡翱翔123梁兴文2史庆轩2陈宜言3陈宝春3王群1李睿璞1
(1.深圳职业技术学院 建筑与环境工程学院,广东 深圳 518055; 2.西安建筑科技大学 土木工程学院,陕西 西安 710055; 3.福州大学 土木工程学院,福建 福州 350108)
Author(s):
HU Aoxiang123LIANG Xingwen2SHI Qingxuan2CHEN Yiyan3CHEN Baochun3WANG Qun1LI Ruipu1
(1.School of Architecture and Environmental Engineering,Shenzhen Polytechnic,Shenzhen 518055,China; 2.School of Civil Engineering,Xi’an Univ.of Arch.& Tech.,Xi’an 710055,China; 3.College of Civil Engineering,Fuzhou University,Fuzhou 350108,China)
关键词:
高强钢筋 UHPC 中心拔出试验 黏结应力-滑移本构方程
Keywords:
high strength bar UHPC pullout test bond stress-slip constitute relationship
分类号:
TU375
DOI:
10.15986/j.1006-7930.2021.04.010
文献标志码:
A
摘要:
为研究高强钢筋与超高性能混凝土(UHPC)的黏结性能,考虑钢筋直径、锚固长度以及保护层厚度等因素对黏结性能的影响,设计了15组45个常温养护条件下的中心拔出试件; 通过中心拔出试验,观察试件在静力荷载作用下的破坏过程、裂缝的产生、试件破坏形态以及黏结应力-滑移曲线特征等.结果表明:高强钢筋与UHPC黏结强度较大,约为48~73 MPa; 与普通混凝土不同的是钢筋与UHPC的黏结强度随着钢筋直径的增加而增加; 黏结强度与保护层厚度成正比,与黏结长度成反比; 保护层厚度对试件破坏模式影响较大,保护层厚度较薄时,试件发生劈裂; 保护层厚度较大时试件发生拔出破坏.钢筋在拔出的过程中黏结应力-滑移曲线与坐标横轴围成的面积较大,表明其耗能能力较强.基于试验结果,结合黏结机理分析提出了黏结强度计算模型以及黏结-滑移本构方程,理论计算结果与试验结果吻合较好.
Abstract:
Pullout test was conducted to investigate the bond characteristics of high strength steel bars embedded in Ultra-High Performance Concrete(UHPC)considering bar diameter,bar embedment length and concrete cover.Measurements included pullout force and slip at free end of the rebar,and crack patterns were monitored and bond failure modes were observed.Some new results had been found in this test.The bond strength increased with an increase in the bar diameter.The thickness of concrete cover had a significant effect on the bond failure type.UHPC had tremendous energy absorb capacity due to the debonding and pullout of steel fibers from the concrete.Analytical models for the evaluation of bond strength and constitute relationship of the bond stress-slip curves are proposed based on the test results,which agree well with the experimental results.

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(编辑 桂智刚)

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备注/Memo

备注/Memo:
收稿日期:2020-09-11 修改稿日期:2021-07-08
基金项目:国家自然科学基金项目(51278402,52078305,20YJCZH074)
第一作者:胡翱翔(1990-),男,博士,主要从事土木工程新材料及其工程应用研究.E-mail:huaoxiang1990@163.com
通信作者:梁兴文(1952-),男,教授,博导,主要从事土木工程新材料及其工程应用研究.E-mail:liangxingwen2000@163.com
更新日期/Last Update: 2021-08-28