600MPa级高强钢筋连接锚固性能试验及计算方法研究
发布时间：2020-05-15 15:43
【摘要】：600MPa级热轧带助高强钢筋作为一种新型建筑材料,凭借其优良的特性,很好地适应了现代工程的需要,且符合人们对建筑行业可持续发展及绿色建材的要求,其与混凝土的粘结锚固问题是推广应用高强钢筋的关键问题。学者们曾进行过很多关于高强钢筋与混凝土粘结锚固性能方面的研究,但主要集中于普通钢筋以及强度在500MPa及以下钢筋,而对更高强度钢筋与混凝土粘结锚固性能的研究比较缺乏。随着中国大力推广高强钢筋,HRB500钢筋已经编入现行《混凝土结构设计规范》(GB50010-2010),600MPa高强钢筋的推广使用也是势在必行。高强钢筋因设计强度明显高于普通钢筋,所需锚固力远远高于普通钢筋,有必要针对600MPa高强钢筋与混凝土之间粘结锚固性能进行研究。本文针对600MPa级钢筋与混凝土之间的黏结锚固性能,通过414个连接锚固试件,其中273个拉拔试件和141个对拉试件进行试验,分析了锚固长度、配箍率、保护层厚度、钢筋直径、混凝土强度、弯锚角度和机械锚固方式对锚固性能的影响。通过对试验数据的统计回归分析,得出了600MPa级高强钢筋与混凝土之间的连接锚固极限黏结强度的计算公式。主要工作总结如下:1)开展了141个600MPa级热轧高强钢筋连接试验,研究参数为搭接长度、配箍率、保护层厚度、钢筋直径、混凝土等级、焊接方式和套筒类型。详细考察了不同锚固下高强钢筋的力学性能和破坏模式。2)通过对四种搭接连接方式分别是,绑扎连接、焊接连接、套筒连接、和闪光焊接连接试验数据的统计回归分析,得出了600MPa级高强钢筋与混凝土之间的连接锚固极限黏结强度的计算公式。3)开展了273个600MPa级热轧高强钢筋粘结锚固试验,研究参数为锚固长度、配箍率、保护层厚度、钢筋直径、混凝土等级、弯锚角度和机械锚固方式。详细考察了不同锚固下高强钢筋的力学性能和破坏模式。4)通过对五种粘结锚固分别是直锚,弯锚,螺栓锚,单侧焊条锚,双侧焊条锚试验数据的统计回归分析,得出了600MPa级高强钢筋与混凝土之间的连接锚固极限黏结强度的计算公式。
【图文】：
Hefei University of Technology MASTER’S DISSERTATIONens Designonfined and confined HSSB specimens were tested. Confinedtirrup reinforcement through the nodal zone while unconfinednothing but the tensile tie steel in the nodal zone region. sts are performed considering the bar diameter, concrete cirrup ratio, cover size and mechanical connection types, as test e connection performance of Grade 600MPa high strength steeists of various types of mechanical connection in 4 categoriesimens, contact lab splice and welded lab splice divided in 5 m. The specific dimensions are shown in Table2.1~Table2.4ng the bond-anchorage length were obtained from 3-5 strg2.5).
Fig 4 7 Framwork of specimens图 4.7 试件设计图The specimens details are shown in Table 2 and Table 4. When processing thspecimens, first frameworks were made, then the steel bars were placed, and finallthe concrete were poured. After the pouring is completed, they were kept in thlaboratory for 28 days to ensure the concrete strength meets the requirements. Thconcrete strength is the same batch of concrete in each set 3 prisms were made for thaverage analysis of the test.The strength of the steel bars is determined by the tensile test. Taken 3 specimenof the same batch of steel bars were taken to analysis the test average values.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2019
【分类号】：TU375
本文编号：2665268
【图文】：
Hefei University of Technology MASTER’S DISSERTATIONens Designonfined and confined HSSB specimens were tested. Confinedtirrup reinforcement through the nodal zone while unconfinednothing but the tensile tie steel in the nodal zone region. sts are performed considering the bar diameter, concrete cirrup ratio, cover size and mechanical connection types, as test e connection performance of Grade 600MPa high strength steeists of various types of mechanical connection in 4 categoriesimens, contact lab splice and welded lab splice divided in 5 m. The specific dimensions are shown in Table2.1~Table2.4ng the bond-anchorage length were obtained from 3-5 strg2.5).
Fig 4 7 Framwork of specimens图 4.7 试件设计图The specimens details are shown in Table 2 and Table 4. When processing thspecimens, first frameworks were made, then the steel bars were placed, and finallthe concrete were poured. After the pouring is completed, they were kept in thlaboratory for 28 days to ensure the concrete strength meets the requirements. Thconcrete strength is the same batch of concrete in each set 3 prisms were made for thaverage analysis of the test.The strength of the steel bars is determined by the tensile test. Taken 3 specimenof the same batch of steel bars were taken to analysis the test average values.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2019
【分类号】：TU375
【参考文献】
相关期刊论文 前5条
1 聂成才;刘克;张守钊;;解读《钢筋套筒灌浆连接应用技术规程》[J];居业;2015年24期
2 曲波;冯菲;;结合国外高强钢筋应用情况探讨高强钢筋在我国的推行[J];河南科技;2014年08期
3 程斌,薛伟辰,周质炎;高性能混凝土应用的最新进展[J];特种结构;2003年04期
4 陈家辉;高性能混凝土应用现状及其前景[J];广东土木与建筑;2000年05期
5 汪洪,徐有邻,史志华;钢筋机械锚固性能的试验研究[J];工业建筑;1991年11期
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