不对称配筋纤维混凝土盾构管片正截面配筋计算
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摘要
采用fib Model Code 2010中纤维对受弯承载力贡献的作用方式,并结合GB 50010—2010《混凝土结构设计规范》中偏心受压构件正截面受力分析,提出了不对称配筋纤维混凝土盾构管片配筋计算方法。以国内某地铁工程管片配筋计算为例,采用该方法计算了纤维混凝土管片正截面配筋并与普通混凝土管片配筋进行对比。同时,计算分析了采用不同等级纤维混凝土时该管片正截面配筋的变化规律。结果表明,纤维的加入可以降低钢筋用量,该方法结合了欧洲规范和国内的钢筋混凝土设计规范,具有较高的可靠性,可用于纤维混凝土盾构隧道管片设计。
Based on the fib Model Code 2010 and GB 50010—2010 Code for Design of Concrete Structures, a calculation method for steel fiber reinforced concrete tunnel segments with asymmetric reinforcement was proposed. The method was used to calculate the amount of reinforcement for steel fiber reinforced concrete tunnel segment in a Chinese metro engineering, and compared with that of common concrete segments. And also, the effect of different classes of SFRC on the reinforcement ratio of segment was analyzed. The results indicate that steel fibers can reduce the amount of steel reinforcement in segment. The proposed method which based on fib Model Code 2010 and GB 50010—2010 has high reliability and can be used to design SFRC tunnel segment.
Based on the fib Model Code 2010 and GB 50010—2010 Code for Design of Concrete Structures, a calculation method for steel fiber reinforced concrete tunnel segments with asymmetric reinforcement was proposed. The method was used to calculate the amount of reinforcement for steel fiber reinforced concrete tunnel segment in a Chinese metro engineering, and compared with that of common concrete segments. And also, the effect of different classes of SFRC on the reinforcement ratio of segment was analyzed. The results indicate that steel fibers can reduce the amount of steel reinforcement in segment. The proposed method which based on fib Model Code 2010 and GB 50010—2010 has high reliability and can be used to design SFRC tunnel segment.
引文
[1]张凤祥,朱合华,傅德明.盾构隧道[M].北京:人民交通出版社,2004.
[2]周文波.盾构法隧道施工技术及应用[M].北京:中国建筑工业出版社,2004.
[3]何川,曾东洋.盾构隧道结构设计及施工对环境的影响[M].西安:西安交通大学出版社,2007.
[4]王梦恕.中国铁路、隧道与地下空间发展概况[J].隧道建设,2010(4):351-364.
[5]孙钧.地铁与江底隧道管片衬砌结构耐久性设计的若干问题[R].上海:上海隧道工程轨道交通设计研究院,2007.
[6]孙钧.崇明长江隧道盾构衬砌管片结构的耐久性设计[J].建筑科学与工程学报,2008(1):1-9.
[7]陈俊生,莫海鸿,梁仲元.盾构隧道施工阶段管片局部开裂原因初探[J].岩石力学与工程学报,2006(5):906-910.
[8]姜敦灿.盾构在推进时隧道管片产生裂缝、碎裂的原因及防治措施[J].隧道建设,2009(6):694-698.
[9]许鸣蝉,张子新.大直径盾构隧道管片损伤成因分析及处理措施[J].地下空间与工程学报,2013(1):1705-1712.
[10]闫治国,朱合华,廖少明,等.地铁隧道钢纤维混凝土管片力学性能研究[J].岩石力学与工程学报,2006(1):2888-2893.
[11]Plizzari G A,Tiberti G.Steel fibers as reinforcement for precast tunnel segments[J].Tunnelling and Underground Space Techno logy,2006(3):438-439.
[12]Dobashi H,Konishi Y,Nakayama M,et al.Development of steel fiber reinforced high fluidity concrete segment and application to construction[J].Tunnelling and Underground Space Technology,2006(3):244-244.
[13]Caratelli A,Meda A,Rinaldi Z,et al.Structural behaviour of precast tunnel segments in fiber reinforced concrete[J].Tunnel ling and Underground Space Technology,2011(2):284-291.
[14]中华人民共和国住房和城乡建设部.GB 50010-2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.
[15]CEB-FIB.CEB-FIB Model code 2010-Design code[S].Final draft,Lausanne,Switzerland,2010.
[16]Di Prisco M,Colombo M,Dozio D.Fibre-reinforced concrete in fib Model Code 2010:principles,models and test validation[J].Structural Concrete,2013(4):342-361.
[2]周文波.盾构法隧道施工技术及应用[M].北京:中国建筑工业出版社,2004.
[3]何川,曾东洋.盾构隧道结构设计及施工对环境的影响[M].西安:西安交通大学出版社,2007.
[4]王梦恕.中国铁路、隧道与地下空间发展概况[J].隧道建设,2010(4):351-364.
[5]孙钧.地铁与江底隧道管片衬砌结构耐久性设计的若干问题[R].上海:上海隧道工程轨道交通设计研究院,2007.
[6]孙钧.崇明长江隧道盾构衬砌管片结构的耐久性设计[J].建筑科学与工程学报,2008(1):1-9.
[7]陈俊生,莫海鸿,梁仲元.盾构隧道施工阶段管片局部开裂原因初探[J].岩石力学与工程学报,2006(5):906-910.
[8]姜敦灿.盾构在推进时隧道管片产生裂缝、碎裂的原因及防治措施[J].隧道建设,2009(6):694-698.
[9]许鸣蝉,张子新.大直径盾构隧道管片损伤成因分析及处理措施[J].地下空间与工程学报,2013(1):1705-1712.
[10]闫治国,朱合华,廖少明,等.地铁隧道钢纤维混凝土管片力学性能研究[J].岩石力学与工程学报,2006(1):2888-2893.
[11]Plizzari G A,Tiberti G.Steel fibers as reinforcement for precast tunnel segments[J].Tunnelling and Underground Space Techno logy,2006(3):438-439.
[12]Dobashi H,Konishi Y,Nakayama M,et al.Development of steel fiber reinforced high fluidity concrete segment and application to construction[J].Tunnelling and Underground Space Technology,2006(3):244-244.
[13]Caratelli A,Meda A,Rinaldi Z,et al.Structural behaviour of precast tunnel segments in fiber reinforced concrete[J].Tunnel ling and Underground Space Technology,2011(2):284-291.
[14]中华人民共和国住房和城乡建设部.GB 50010-2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.
[15]CEB-FIB.CEB-FIB Model code 2010-Design code[S].Final draft,Lausanne,Switzerland,2010.
[16]Di Prisco M,Colombo M,Dozio D.Fibre-reinforced concrete in fib Model Code 2010:principles,models and test validation[J].Structural Concrete,2013(4):342-361.