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粘角钢加固钢筋混凝土梁的试验研究
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摘要
本文通过对16根钢筋混凝土梁的受弯试验研究,验证了采用在梁底粘贴角钢进行加固这一加固技术的适用性和有效性,并推导了其正截面承载力及短期刚度的计算公式。
     本次试验从混凝土强度等级、粘钢面积、锚固情况和加载方式这几方面入手,研究了这些因素对加固效果的影响。试验表明,对于一些混凝土强度等级较低(≤C15)的钢筋混凝土梁不宜采用这种加固方法;而且加强角钢端头的锚固可大大地提高加固效果。然后,通过对各组试件的荷载-挠度曲线的进一步分析表明:对于混凝土强度等级高于C15的钢筋混凝土梁,采用这种粘角钢加固法能有效提高钢筋混凝土梁的正截面承载力和短期刚度。
     最后,通过学习和借鉴国内外混凝土结构规范中有关钢筋混凝土梁正截面强度和刚度的计算公式,以及国内外的科研成果,本文提出了采用这种加固方法加固的受弯构件的正截面承载力和短期刚度的计算公式。本文还采用非线性有限元程序ANSYS对粘钢加固试件进行了模拟分析和验证。公式中的假设与现行规范GB10—89的公式中的假设基本一致,其计算结果与试验值吻合较好。但是,鉴于试验范围及所采集到的试验数据有限,公式中的有关系数尚需进一步修正。
By experimental research of sixteen reinforced concrete beams, this thesis validates the feasibility and efficiency of the method strengthening RC beams by gluing angle steels, and the calculation formulas of the bearing capacity of normal section and short-dated rigidity of beams are deduced.
    In this experiment, some conditions, such as the strength of concrete, the area of angle steel, ends of the steel and modes of loading are considered, and the influence of them are analyzed. The results show that the strengthening method is not fit for RC structures made of low-strength concrete(C15). Then, by analyzing the extensive test data of load-displacement and bear-curvature, we can conclude that the crack resistance, bearing capacity of normal section and short-dated rigidity will be improved a lot when the strength of concrete is not so low.
    At last, by learning and making use of formulas of the bearing capacity of normal section and short-dated rigidity in some domestic and overseas concrete construction standard and technological research achievements, the calculation formulas are proposed. It was analyzed and validated by the nonlinear finite element program-ANSYS. The assumption in this paper are approximately according with present code, and the calculated results agree with experimental results very well. Because of limited experimental range and collected data, some parameters should be revised.
引文
[1]四川省建筑科学研究院.CECS25:90,混凝土结构加固技术规范.北京:中国计划出版社,1990.
    [2]郑道宏.积极开展建筑物鉴定与加固技术研究.建筑物鉴定与加固论集,第三届全国学术讨论会,1995年10月,P1-5.
    [3]S.K.Solomon, D.W. Smith. Cusens Flexural tests of steel-concrete-steel Sandwiches. Magazine of Concrete Research, vol.28.No.94, March 1976, p13-20.
    [4]R.Jones, R.N.Swamy and T.H.Ang. Under and over reinforced concrete beams with glued steel plates. The international Journal of cerment composites and light weight concrete, Vol.4.No.1, February 1982, p19-32.
    [5]R.N. Swamg, R.Jones, and J.W. Bloxham. Structural behavior of reinforced concrete beams strengthened by epoxy-bonded steel plates. The structural Engineer, Vol.65A.No.2, Feb. 1987.
    [6]R.N.Swamg. The effects of external plate reinforcement on the strengthening of structurally by damaged RC beams. The Structural Engineer, Vol.67.No.3, Feb. 1989, p45-54.
    [7]R.Jones, R.N.Swamy. Plate separation and anchorage of reinforced concrete beams strengthened by epoxy-bonded steel plates. The Structural Engineer, Vol.66.No.5/1, March. 1988.
    [8]T.M.Robert. Approximate Analysis of shear and Normal stress concentrations in the Adhesive layer of plated RC beams. The Structural Engineer, Vol.67.No.12, June. 1989, p229-233.
    [9]I.A.Basumbul, A.A.Gubati, G.T. AL-Sulaimani, M.H.Baluch. Repaired Reinforced Concrete Beams. ACI Materials Journal, July-August 1990.
    [10]R.N.Swamy et al. Strengthening for shear of RC beams by external plate bonding. The Structural Engineer, Vol.77.NO.12, June. 1999.
    [11]罗竟宁,顾慧娟著.钢筋混凝土梁粘钢补强试验研究.工业建筑,1991.2.
    [12]张良镒,郑生钦.粘贴钢板加固的钢筋混凝土受弯构件在反复荷载作用下的性能.钢筋混凝土结构粘钢加固课题研究资料汇编,1991.4.
    
    
    [13]贾燎.青岛路仓库加固工程施工总结.钢筋混凝土结构粘钢加固课题研究资料汇编,1991.4.
    [14]王淞生.外部粘钢加固技术推广应用简介.钢筋混凝土结构粘钢加固课题研究资料汇编,1991.4.
    [15]万墨林,韩继云.混凝土结构加固技术,中国建筑工业出版社,1995.3.
    [16]黄勤.粘钢加固钢筋混凝土梁受力机理的研究.同济大学硕士硕士研究生学位论文,1996.3.
    [17]贺学军.钢板粘钢加固混凝土结构质量分析控制条件.湖南大学硕士研究生学位论文,1998.1.
    [18]贺敏旭.斜截面粘钢加固锚固抗剪承载力.武汉水利电力大学硕士研究生学位论文,1998.6.
    [19]王天稳,贺敏旭,王晓光.混凝土梁斜截面粘钢加固斜粘钢板的锚固方式.建筑技术,第30卷第6期,1999.6.
    [20]梁丛中.钢筋混凝土梁粘钢加固的抗震构造及其性能研究.同济大学东南大学硕士研究生学位论文.2000.3.
    [21]吴刚,安琳,吕志涛.碳纤维布用于钢筋混凝土梁抗弯加固的试验研究.建筑结构,第20卷第7期,2000.7.
    [22]吴刚,安琳,吕志涛.碳纤维布用于钢筋混凝土梁抗剪加固的试验研究。建筑结构,第20卷第7期,2000.7.
    [23]赵彤,谢剑,戴自强.碳纤维布加固钢筋混凝土梁的受弯加固承载力试验研究.建筑结构,第20卷第7期,2000.7.
    [24]叶列平,赵树红,李全旺,岳清瑞,张轲.碳纤维布加固钢筋混凝土柱的斜截面受剪承载力计算.建筑结构学报,第21卷第2期,2000.4.
    [25]张轲,岳清瑞,叶列平,赵树红.碳纤维布加固混凝土柱改善延性的试验研究.工业建筑,第30卷第2期,2000年.
    [26]赵彤,戴自强,张景明,刘明国,谢剑.碳纤维布增强钢筋混凝土柱抗震能力的试验研究.建筑结构,第20卷第7期,2000。7.
    [27]黄兴,田棣.钢筋混凝土结构加固削发展概论.第三届全国学术讨论会建筑物鉴定与加固论集第三届全国学术讨论会,1995年10月,P61-67.
    [28]吕西林.建筑结构加固设计.北京:科学出版社,2001年2月.
    
    
    [29]腾智明,罗福午,施岚青。钢筋混凝土基本构件.北京:清华大学出版社,1987年10月,P229-230.
    [30]王传志,腾智明.钢筋混凝土结构理论.北京:中国建筑出版社,1985年3月.
    [31]S.K.Ghosh. Analysis of Deformation in Structural Concrete Flexural Members. ACI, SP-43,1974.
    [32]混凝土结构设计规范.北京:中国建筑工业出版社,1989.
    [33]丁大均.学习新的《钢筋混凝土结构设计规范(G810-89)》的探讨.工业建筑,1992(6),p2-7.
    [34]熊丹安,刘声扬.建筑结构.广州:华南理工大学出版社,1996.
    [35]钢筋混凝土结构外粘钢板加固技术规程[DB),武汉:湖北省建科院出版社,2000。
    [36]欧阳坚.劲性钢筋混凝土受弯构件短期刚度与裂缝宽度试验研究.东南大学硕士研究生学位论文,1990,p116.
    [37]丁大均执笔.钢筋混凝土受弯构件变形和裂缝计算.钢筋混凝土结构研究报告选集(1),北京:中国建筑工业出版社,1974年.237-289.
    [38]中华人民共和国标准.刚结构设计规范(GBJ17-89).北京:中国建筑工业出版社.1994.
    [39]赵彤,郑宏,戴自强,张景明,谢剑.碳纤维布加固钢筋混凝土柱正截面承载能力试验研究.建筑结构,第20卷第7期,2000.7.
    [40]Mathoud. T. EL-Mihilmy, Joseph W. Tedeso. Deflection of Reinforced Concrete Beams Strengthened with FRP plates. ACI STRUCTURE JOURNAL, Sep/Oct, 2000.
    [41]Scorderis. Finite Element Analysis of Reinforced beams. ACT Journal, Vol.64, March 1976.
    [42]Nilsson, Arthur H. Nonlinear Analysis of Reinforced Concrete by the Finite Element Method. ACI Jouneral, Vol.65, September 1968.
    [43]Frankin.H.A. Nonlinear Analysis of Reinforced Concrete Frames and Panels. Ph.D. Dissertation. Division of Structure Engineering and Structural Mechanics, University of California, Berkeley, March, 1970.
    [44]zienkiewiez, O.C.,Owen, D.R.H. Phillips,D.V, Nyak G.C. Finite Element Method in Analysis of Reactor Vessels. Nuclear Engineering and Design, 20(1972).
    [45]Lin,C.S. and Scorderis, A.C., Nonlinear Analysis of Reinforced Concrete Shells of General Form, Journal of Structure Division, ASCE.Vol. 101. March 1975.
    
    
    [46]Darwin,D, Pecknold, D.A . Analysis of Reinforced Shear Panels Under Cyclic loading. Journal of Structure Division, Vol. 102, Februry 1976.
    [47]Chen, W.F.. Plasticity in Reinforced Concrete. McGraw-Hill Book Company, Inc.,New York, 1981.
    [48]江见鲸.钢筋混凝土结构非线性有限元分析.陕西科学技术出版社,1990年10月。

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