高性能结构钢Q345GJ设计参数分析
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摘要
随着高层和大跨度钢结构的兴建,国内对钢结构材料也逐步进行着更新换代。国内率先由邯郸钢铁集团舞阳钢铁有限责任公司自主研发生产了优质建筑用钢材——高性能建筑用钢板。此种钢材在具有足够的强度的同时,还有较低的屈强比,因此具有更好的抗震性能;它还具有良好的综合力学性能和焊接性能、较窄的屈服点波动范围以及抗层状撕裂的能力(厚度方向性能)。因此高建系列钢材的出现解决了传统钢材用于高层与大跨建筑中易出现的一些问题。但是对于其设计参数的研究还是空白,为了推广高性能优质钢材和实现优材优用,使高建系列钢材进入《高层民用建筑钢结构技术规程》,本文基于试验和分析得出高建钢的抗力分项系数,提出科学合理的设计参数建议值。
介绍了工程结构可靠性的基本概念,回顾了可靠性理论的研究历史,评价了工程结构可靠度分析常用的几种实用方法,分析了钢结构各结构构件抗力统计参数的影响因素,给出了各统计参数的计算方法。
在实验得出Q345GJ的材性参数特征值的基础上,对各种受力构件进行可靠度分析,综合得出了Q345GJ的抗力分项系数。
利用分析得出的抗力分项系数和《建筑结构荷载规范》(GB50009-2001)以及《建筑结构可靠度设计统一标准》(GB50068-2001)反算出各种受力构件的安全度指标,指出了结构构件在部分情况下可靠度偏低的问题,并作简要分析。
对于风荷载参与的组合下可靠度指标偏低的现象,给出了调整的方法,有效的解决了风荷载参与的组合下可靠度指标偏低的情况。
为了达到优材优用的目标,设想不同的受力特征构件使用不同的抗力分项系数,在大量分析的基础上,给出了这一系列参数,并且具有明显的经济性,可以作为工程应用参考。
Along with high rise and long span steel buildings are rapidly developing in big cities in our country, the material used in steel structure is updating gradually, in domestic, Wu Yang Iron and Steel Co.Ltd of Han Dan Iron and Steel Group have produced high quality steel for buidings——high performance structure steel firstly and independently. As this steel not only has high strength, but also has low yield ratio, so, Firstly, it has nicer capability of earthquake resistance. Secondly, it has excellent general mechanical properties and weldability. At last ,it has narrow yeild point wave zone and good z-direction property. For all of above, it can solve some problems occured in high rise building which used traditional steel plate. But its design characteristics are still blank in our country’s design codes. For generalize this high performance stell and realize high performance steel to be used in right manner and make it to be written in <>, this paper will give some resistance partial coefficients and recommended design strength value based on test and analyses.
Briefly introduces the basic concept of engineering structure reliability and reviews the history of research of reliability theory. Some practical methods for analysis of reliability for building structures are valued. the influential factors of resistance partial coefficients of the steel constructures’each component are anaiysesed and the methods for calculating the coefficients of reliability design are proposed.
At the base of the material properties parameter eigenvalues of Q345GJ by the test, the paper achieves resistance partial coefficients of Q345GJ generaly by analysing the reliability of each structure member under the different load case.
The paper calculate the safty index of all kinds of structure menbers in reverse by using analysed resistance partial coefficients and << Unified standard for reliability design of building structures>>(GB50068-2001) as well as <>(GB50009-2001). It indicate that some values of safety index are lower in some lode case, and gives a brif analysis.
Aiming at sovling the problem that the safety index is lower under the combination of load case which contains wind load, this paper gives a method to modify the safety index, and slove this problem effictively.
For the sake of economy, this paper give the different resistance partial coefficients for different structure members in different load cases at the base of plentiful analyses. It indicates that this method is obvious economical, and can give a reference for design.
介绍了工程结构可靠性的基本概念,回顾了可靠性理论的研究历史,评价了工程结构可靠度分析常用的几种实用方法,分析了钢结构各结构构件抗力统计参数的影响因素,给出了各统计参数的计算方法。
在实验得出Q345GJ的材性参数特征值的基础上,对各种受力构件进行可靠度分析,综合得出了Q345GJ的抗力分项系数。
利用分析得出的抗力分项系数和《建筑结构荷载规范》(GB50009-2001)以及《建筑结构可靠度设计统一标准》(GB50068-2001)反算出各种受力构件的安全度指标,指出了结构构件在部分情况下可靠度偏低的问题,并作简要分析。
对于风荷载参与的组合下可靠度指标偏低的现象,给出了调整的方法,有效的解决了风荷载参与的组合下可靠度指标偏低的情况。
为了达到优材优用的目标,设想不同的受力特征构件使用不同的抗力分项系数,在大量分析的基础上,给出了这一系列参数,并且具有明显的经济性,可以作为工程应用参考。
Along with high rise and long span steel buildings are rapidly developing in big cities in our country, the material used in steel structure is updating gradually, in domestic, Wu Yang Iron and Steel Co.Ltd of Han Dan Iron and Steel Group have produced high quality steel for buidings——high performance structure steel firstly and independently. As this steel not only has high strength, but also has low yield ratio, so, Firstly, it has nicer capability of earthquake resistance. Secondly, it has excellent general mechanical properties and weldability. At last ,it has narrow yeild point wave zone and good z-direction property. For all of above, it can solve some problems occured in high rise building which used traditional steel plate. But its design characteristics are still blank in our country’s design codes. For generalize this high performance stell and realize high performance steel to be used in right manner and make it to be written in <
Briefly introduces the basic concept of engineering structure reliability and reviews the history of research of reliability theory. Some practical methods for analysis of reliability for building structures are valued. the influential factors of resistance partial coefficients of the steel constructures’each component are anaiysesed and the methods for calculating the coefficients of reliability design are proposed.
At the base of the material properties parameter eigenvalues of Q345GJ by the test, the paper achieves resistance partial coefficients of Q345GJ generaly by analysing the reliability of each structure member under the different load case.
The paper calculate the safty index of all kinds of structure menbers in reverse by using analysed resistance partial coefficients and << Unified standard for reliability design of building structures>>(GB50068-2001) as well as <
Aiming at sovling the problem that the safety index is lower under the combination of load case which contains wind load, this paper gives a method to modify the safety index, and slove this problem effictively.
For the sake of economy, this paper give the different resistance partial coefficients for different structure members in different load cases at the base of plentiful analyses. It indicates that this method is obvious economical, and can give a reference for design.
引文
[1]贡金鑫,仲伟秋,赵国藩.工程结构可靠性基本理论的发展与应用[J].建筑结构学报, 2002,8.
[2] Freudenthal.A.M. The safety of structures[M]. ASCE. 1947. V112.
[3]赵国藩,曹居易,张宽权.工程结构可靠度[M].北京:水利电力出版社.1984.12.
[4] Hasofer A M.and Lind N C.Exact and Invariant Second-momrnt Format[J]. Journal of the Engineering Mechanics.1974.100(1).
[5] Alfredo H-S.Ang, Wilson H.Tang. Probability concepts in engineering planning and design.[J]. VolumeⅠ.1975.VolumeⅡ.1984.
[6] R.M.Bennett, A.H-S.Ang, Investigation of methods for structural system reliability[M]. University of Illinois at Urbana-Chanpaign.September 1983.
[7]刘西拉等.结构可靠性研究进展[C].工程结构可靠性全国第四届学术交流会议论文集.1995.
[8]赵国藩,金伟良,贡金鑫.结构可靠度理论[M].北京:中国建筑工业出版社.2000.12.
[9]邵卓民,陈定外,何广乾译校.结构可靠性总原则(ISO 2394)1996年修订版[J].工程建设标准化.1996(6).1997 1-5.
[10]金伟良.结构体系可靠度的数值模拟[C].工程结构可靠性全国第四届学术交流会议论集.1995.
[11]李明顺,史志华等.《建筑结构可靠度设计统一标准》(GB50068-2001)的技术合理性与依据[J].建筑结构学报.2002.1.
[12]常跃峰,赵文忠.《高层建筑结构用钢板》(YB4104-2000)标准制定与修订的技术特点.钢结构[J]. 2004年第6期第19卷总第75期.
[13]李继华.可靠性数学[M].北京:中国建筑工业出版社.1988.
[14]魏明钟.钢结构[M].武汉:武汉工业大学出版社.2000.
[15]吴世伟.结构可靠度分析[M].北京:人民交通出版社.1990.
[16]张新培.建筑结构可靠度分析与设计[M].北京:科学出版社.2001.
[17] GB50153-92.工程结构可靠设计统一标准[S].
[18] ISO 2394 General Principle on Reliability for Structures[S].
[19]李云贵,赵国藩.广义随机空间内的一次可靠度分析方法[J].大连理工大学学报.1993.10.
[20]赵国藩.结构可靠度的实用分析方法[J].建筑结构学报.1984,5(3).
[21] ZHAO G F.A practical FOSM method for structural reliability analysis[C]. Proceeding of 4th International Conference on Structural Safety and Reliability.
[22] L.Stevenson and F.Moses, Reliability analysis of frame structures[J], J.Struct. Div. ASCE. ST11. 96.1970.
[23] Hak-Fong Ma, A.H-S. Ang.Investigation of methods for structural system reliability[J]. Univ -ersity of Illinois at Urbana-Champaign.September.1983.
[24] O.Dltlevsen.Narrow. reliability bounds for structural system[J]. Strut.Mech4(1).1979.
[25] Melchers.R.E. Structural reliability analysis and prediction. Ellis Horwood Series in Civil Engineering[M]. Halsted Press. England. 1987.
[26]中华人民共和国国家标准GBJ 68-84建筑结构设计统一标准[S].中国建筑工业出版社,1984.
[27]中华人民共和国国家标准GB 50068-2001建筑结构可靠度设计统一标准[S].中国建筑工业出版社, 2001.
[28]戴国欣,夏正中.建筑钢结构适用性分析[J]建筑结构学报, 2000年6月第21卷第3期.
[29]陈国兴,李继华.钢构件材料强度及截面几何特性的统计参数[J].重庆建筑工程学院科技情报科.1983.6.
[30]陈国兴,李继华.钢构件材料强度及截面几何特性的统计参数[J].重庆建筑工程学院学报, 1985年第1期.
[31]李继华,夏正中.建筑结构可靠度及概率极限状态设计[J].重庆建筑工程学院学报, 1982.
[32]戴国欣,李龙春,夏正中.建筑结构钢新材性参数的统计与分析[J]建筑结构, 2000年4月第30卷第4期.
[33]熊刚.钢结构设计规范(GB 50017-2003)总体安全度分析[D].重庆大学硕士论文, 2003年10月.
[34]戴国欣,邓玉孙.结构设计荷载组合取值变化及其影响分析[J].土木工程学报, 2003年4月第36卷第4期.
[35]中华人民共和国国家标准GB/T 19879-2005建筑结构用钢板[S].中国建筑工业出版社, 2006.
[36]褚燕风,戴国欣等. Q345GJ结构钢材性试验与参数估计[C].工业建筑2007(增).
[37]杜风茂,戴国欣等. Q345结构钢构件截面几何特性统计参数估计[C].工业建筑2007(增).
[2] Freudenthal.A.M. The safety of structures[M]. ASCE. 1947. V112.
[3]赵国藩,曹居易,张宽权.工程结构可靠度[M].北京:水利电力出版社.1984.12.
[4] Hasofer A M.and Lind N C.Exact and Invariant Second-momrnt Format[J]. Journal of the Engineering Mechanics.1974.100(1).
[5] Alfredo H-S.Ang, Wilson H.Tang. Probability concepts in engineering planning and design.[J]. VolumeⅠ.1975.VolumeⅡ.1984.
[6] R.M.Bennett, A.H-S.Ang, Investigation of methods for structural system reliability[M]. University of Illinois at Urbana-Chanpaign.September 1983.
[7]刘西拉等.结构可靠性研究进展[C].工程结构可靠性全国第四届学术交流会议论文集.1995.
[8]赵国藩,金伟良,贡金鑫.结构可靠度理论[M].北京:中国建筑工业出版社.2000.12.
[9]邵卓民,陈定外,何广乾译校.结构可靠性总原则(ISO 2394)1996年修订版[J].工程建设标准化.1996(6).1997 1-5.
[10]金伟良.结构体系可靠度的数值模拟[C].工程结构可靠性全国第四届学术交流会议论集.1995.
[11]李明顺,史志华等.《建筑结构可靠度设计统一标准》(GB50068-2001)的技术合理性与依据[J].建筑结构学报.2002.1.
[12]常跃峰,赵文忠.《高层建筑结构用钢板》(YB4104-2000)标准制定与修订的技术特点.钢结构[J]. 2004年第6期第19卷总第75期.
[13]李继华.可靠性数学[M].北京:中国建筑工业出版社.1988.
[14]魏明钟.钢结构[M].武汉:武汉工业大学出版社.2000.
[15]吴世伟.结构可靠度分析[M].北京:人民交通出版社.1990.
[16]张新培.建筑结构可靠度分析与设计[M].北京:科学出版社.2001.
[17] GB50153-92.工程结构可靠设计统一标准[S].
[18] ISO 2394 General Principle on Reliability for Structures[S].
[19]李云贵,赵国藩.广义随机空间内的一次可靠度分析方法[J].大连理工大学学报.1993.10.
[20]赵国藩.结构可靠度的实用分析方法[J].建筑结构学报.1984,5(3).
[21] ZHAO G F.A practical FOSM method for structural reliability analysis[C]. Proceeding of 4th International Conference on Structural Safety and Reliability.
[22] L.Stevenson and F.Moses, Reliability analysis of frame structures[J], J.Struct. Div. ASCE. ST11. 96.1970.
[23] Hak-Fong Ma, A.H-S. Ang.Investigation of methods for structural system reliability[J]. Univ -ersity of Illinois at Urbana-Champaign.September.1983.
[24] O.Dltlevsen.Narrow. reliability bounds for structural system[J]. Strut.Mech4(1).1979.
[25] Melchers.R.E. Structural reliability analysis and prediction. Ellis Horwood Series in Civil Engineering[M]. Halsted Press. England. 1987.
[26]中华人民共和国国家标准GBJ 68-84建筑结构设计统一标准[S].中国建筑工业出版社,1984.
[27]中华人民共和国国家标准GB 50068-2001建筑结构可靠度设计统一标准[S].中国建筑工业出版社, 2001.
[28]戴国欣,夏正中.建筑钢结构适用性分析[J]建筑结构学报, 2000年6月第21卷第3期.
[29]陈国兴,李继华.钢构件材料强度及截面几何特性的统计参数[J].重庆建筑工程学院科技情报科.1983.6.
[30]陈国兴,李继华.钢构件材料强度及截面几何特性的统计参数[J].重庆建筑工程学院学报, 1985年第1期.
[31]李继华,夏正中.建筑结构可靠度及概率极限状态设计[J].重庆建筑工程学院学报, 1982.
[32]戴国欣,李龙春,夏正中.建筑结构钢新材性参数的统计与分析[J]建筑结构, 2000年4月第30卷第4期.
[33]熊刚.钢结构设计规范(GB 50017-2003)总体安全度分析[D].重庆大学硕士论文, 2003年10月.
[34]戴国欣,邓玉孙.结构设计荷载组合取值变化及其影响分析[J].土木工程学报, 2003年4月第36卷第4期.
[35]中华人民共和国国家标准GB/T 19879-2005建筑结构用钢板[S].中国建筑工业出版社, 2006.
[36]褚燕风,戴国欣等. Q345GJ结构钢材性试验与参数估计[C].工业建筑2007(增).
[37]杜风茂,戴国欣等. Q345结构钢构件截面几何特性统计参数估计[C].工业建筑2007(增).