高强耐蚀钢筋黏结锚固性能研究
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摘要
通过24个高强耐蚀钢筋与普通混凝土黏结锚固试验,分析了混凝土抗拉强度、锚固长度、配箍率、保护层厚度及钢筋直径对其黏结性能的影响,拟合了新型钢筋混凝土黏结锚固强度公式。结果表明:该种新型钢筋混凝土与普通钢筋混凝土的黏结锚固性能及影响因素基本相同;但是由于钢筋外形参数的改变使得其黏结强度高于普通钢筋;同时运用中心点法对该种高强耐蚀钢筋混凝土进行了临界锚固长度可靠度分析,为该新型钢筋临界锚固长度提供建议。
A total of 24 specimens were tested to investigate the bonding and anchoring behavior of high-strength corrosion resistance rebar and normal concrete. The influences of different parameters on bonding performance were analyzed,including concrete tensile strength,anchorage length,stirrup ratio,cover thickness and rebar diameter.Based on the experimental results,a new formula was proposed by curve fitting to predict the bonding anchorage strength of reinforced concrete with the new rebar. The research confirmed that the dominant parameters of bonding anchorage performance for reinforced concrete with such new rebar was the same as that with traditional rebar.However,such new rebar had higher bonding strength due to its shape parameters. In addition,the reliability analysis of the critical anchorage length for the new rebar was also conducted by using central point method,and the critical anchorage length of the new rebar was also suggested.
A total of 24 specimens were tested to investigate the bonding and anchoring behavior of high-strength corrosion resistance rebar and normal concrete. The influences of different parameters on bonding performance were analyzed,including concrete tensile strength,anchorage length,stirrup ratio,cover thickness and rebar diameter.Based on the experimental results,a new formula was proposed by curve fitting to predict the bonding anchorage strength of reinforced concrete with the new rebar. The research confirmed that the dominant parameters of bonding anchorage performance for reinforced concrete with such new rebar was the same as that with traditional rebar.However,such new rebar had higher bonding strength due to its shape parameters. In addition,the reliability analysis of the critical anchorage length for the new rebar was also conducted by using central point method,and the critical anchorage length of the new rebar was also suggested.
引文
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[4]徐春一,逯彪,苑永胜.双相体不锈钢筋与混凝土黏结性能试验及有限元模拟[J].混凝土,2018(5):51-55.
[5]吴苗苗,张国学,曾小林,等.钢筋混凝土黏结强度拔出试验的有限元模拟分析[J].工业建筑,2007,37(增刊1):908-911.
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[11]牛旭宁.600MPa级热轧带肋钢筋黏结锚固性能试验研究[D].天津:河北工业大学,2015.
[12]李海瑞.高强钢筋与混凝土锚固性能试验研究[D].天津:天津大学,2014.
[13]刘明,张炳成.月牙肋钢筋相对投影肋面积的计算和保证[J].冶金标准化与质量,1999(2):21-26.
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[2]蔡佳兴,范益,张万灵.经济型耐腐蚀钢筋研发的探讨[J].南钢科技与管理,2015(2):24-27.
[3]AHLBORN T M,DENHARTIGH T C.Comparative Bond Study of Stainless and High-Chromium Reinforcing Bars in Concrete[J].Transportation Research Record Journal of the Transportation Research Board,2003,1845:88-95.
[4]徐春一,逯彪,苑永胜.双相体不锈钢筋与混凝土黏结性能试验及有限元模拟[J].混凝土,2018(5):51-55.
[5]吴苗苗,张国学,曾小林,等.钢筋混凝土黏结强度拔出试验的有限元模拟分析[J].工业建筑,2007,37(增刊1):908-911.
[6]中华人民共和国建设部.普通混凝土力学性能试验方法标准:GB/T 50081-2003[S].北京:中国建筑工业出版社,2003.
[7]胡玲,杨勇新,王全凤,等.HRBF500钢筋黏结锚固性能的试验研究[J].工业建筑,2009,39(11):13-16.
[8]中华人民共和国住房和城乡建设部.混凝土结构试验方法标准:GB 50152-2012[S].北京:中国建筑工业出版社,2012.
[9]徐有邻,沈文都.钢筋砼黏结锚固性能的试验研究[J].建筑结构学报,1994,15(3):26-37.
[10]SOROUSHIAN P,CHOI K B.Local Bond of Deformed Bars with Different Diameters in Confined Concrete[J].ACI Structural Journal,1989,86(2):217-222.
[11]牛旭宁.600MPa级热轧带肋钢筋黏结锚固性能试验研究[D].天津:河北工业大学,2015.
[12]李海瑞.高强钢筋与混凝土锚固性能试验研究[D].天津:天津大学,2014.
[13]刘明,张炳成.月牙肋钢筋相对投影肋面积的计算和保证[J].冶金标准化与质量,1999(2):21-26.
[14]中华人民共和国住房和城乡建设部.混凝土结构设计规范:GB 50010-2010[S].北京:中国建筑工业出版社,2010.
[15]邵卓民,沈文都,徐有邻.钢筋砼的锚固可靠度及锚固设计[J].建筑结构学报,1987,8(4):36-49.
[16]中华人民共和国建设部.建筑结构可靠度设计统一标准:GB50068-2001[S].北京:中国建筑工业出版社,2001.