中美混凝土结构抗震承载力验算安全度设置水平的比较
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摘要
为了借鉴国外抗震规范的先进经验,选取我国GB 50011—2001《建筑抗震设计规范》(2008年版)、GB 50010—2002《混凝土结构设计规范》和美国ASCE/SEI 7-05《Minimum Design Loads for Buildings and Other Struc-tures》、ACI 318M-05《Building Code Requirements for Structural Concrete and Commentary》,从分项系数设计表达式的相当安全系数的角度,对中美规范混凝土结构基本构件抗震承载力验算的安全度设置水平进行计算分析和比较,获得中美抗震规范混凝土结构基本构件抗震承载力验算安全度设置水平差异的定量数据。相当安全系数的计算结果表明,我国规范混凝土结构基本构件抗震承载力验算的安全度设置水平总体上比美国规范的偏低一些,其中属于延性破坏的正截面受弯构件和大偏心受压构件,截面抗震承载力验算的安全度设置水平平均偏低8%～12%左右;属于脆性破坏的斜截面受剪构件和小偏心受压构件,截面抗震承载力验算的安全度设置水平平均偏低19%～23%左右。建议我国规范今后修订时,对混凝土结构基本构件截面抗震承载力验算的安全度设置水平宜作适当提高。
In order to learn from the the advanced experience from the foreign seismic codes,with our GB 50011—2001(Version: 2008)
In order to learn from the the advanced experience from the foreign seismic codes,with our GB 50011—2001(Version: 2008)
,American ASCE/SEI 7-05,and ACI 318M-05 selected as research material,this paper calculates and compares the safety level set of the seismic bearing capacity of basic components checked for concrete structures in the Chinese and American codes from the aspect of comparative safety coefficient of the partial safety factor design expression,and obtains the quantitative data evaluating the difference in the safety level of the concrete structural components seismic bearing capacity between Chinese and American codes.The calculation results of the comparative safety coefficient indicate that the safety level of seismic bearing capacity of basic concrete structural components in Chinese code is generally lower than that in American code.For members with normal section in bending and those under large eccentric loading,whose failure pertain to ductile failure,the average difference in the safety level of sectional seismic bearing capacity checking between Chinese and American code is approximately from 8% to 12%;For members with oblique section in shear and those under small eccentric loading,whose failure pertain to brittle failure,the relavant average difference is approximately from 19% to 23%.Therefore it is suggested that the safety level set of the seismic bearing capacity of the basic concrete structural components should be improved when revising the Chinese code.
引文
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[2]韦锋,李刚强,白绍良.各国设计规范对基准设防地震和结构超强的考虑[J].重庆大学学报:自然科学版,2007(6):102-108(Wei Feng,Li Gangqiang,BaiShaoliang.Reference earthquake design level andconsideration of structure overstrength in latest seismicdesign codes of different countries[J].Journal ofChongqing University:Natural Science Edition,2007(6):102-108(in Chinese))
[3]刘洁平,李小东,张令心.浅谈欧洲规范Eurocode 8—结构抗震设计[J].世界地震工程,2006(3):53-59(LiuJieping,Li Xiaodong,Zhang Lingxin.Elementaryintroduction to Eurocode 8—design of structures forearthquake resistance[J].World Earthquake Engineering,2006(3):53-59(in Chinese))
[4]罗奇峰,谢礼立.世界抗震设计规范发展趋势研究[J].地震工程与工程振动,1993(3):89-101(Luo Qifeng,XieLili.On the trends of world seismic design codes[J].Earthquake Engineering and Engineering Vibration,1993(3):89-101(in Chinese))
[5]陈宏,侯建国.中美混凝土结构设计规范抗震设计规定的比较研究[J].武汉大学学报,2005(增):107-110(Chen Hong,Hou Jianguo.Comparison between aseismicprovisions of Chinese concrete structure design code andthat of American code[J].Engineering Journal of WuhanUniversity,2005(S):107-110(in Chinese))
[6]黄璜,侯建国.中美钢结构设计规范抗震设计规定的比较研究[J].武汉大学学报,2005(增):111-114(HuangHuang,Hou Jianguo.Comparison between provisions ofChinese and Amercian steel structure seismic design[J].Engineering Journal of Wuhan University,2005(S):111-114(in Chinese))
[7]杨媛,白绍良.从各国规范对比看我国抗震设计安全水准评价中的有关问题[J].重庆建筑大学学报,2000,22(5):192-200(Yang Yuan,Bai Shaoliang.Issues onreliability level of China seismic design code of buildings bycomparison with other countries[J].Journal of ChongqingJianzhu University,2000,22(5):192-200(in Chinese))
[8]王亚勇,郭子雄,吕西林.建筑抗震设计中地震作用取值——主要国家抗震规范比较[J].建筑科学,1999,15(5):36-39(Wang Yayong,Guo Zixiong,LüXilin.Theearthquake value of seismic design—comparision of the codefor seismic design with different countries[J].BuildingScience,1999,15(5):36-39(in Chinese))
[9]罗开海,王亚勇.中美欧抗震设计规范地震动参数换算关系的研究[J].建筑结构,2006(8):103-107(LuoKaihai,Wang Yayong.Rescarch on conversionrelationships among the parameters of ground motions inseismic design codes of China[J].Building Structure,2006(8):103-107(in Chinese))
[10]童根树,赵永峰.中日欧美抗震规范结构影响系数的构成及其对塑性变形需求的影响[J].建筑钢结构进展,2008(5):53-62(Tong Genshu,Zhao Yongfeng.Composition of structural behavior factors in codes ofChina,Japan,Europe and USA for earthquake-resistanceand their corresponding ductility demands[J].Progress inSteel Building Structures,2008(5):53-62(in Chinese))
[11]翟长海,谢礼立.抗震规范应用强度折减系数的现状及分析[J].地震工程与工程振动,2006(2):1-7(ZhaiChanghai,Xie Lili.State-of-art of applications of strengthreduction factors in seismic design codes[J].EarthquakeEngineering and Engineering Vibration,2006(2):1-7(inChinese))
[12]卢华喜,梁平英,仇早生.中美设计规范中场地分类和场地效应的比较[J].工业建筑,2009(6):79-83(LuHuaxi,Liang Pingying,Qiu Zaosheng.ComparativeAnalysis of Site Classfication and Site Effects BetweenChinese Code GB 50011—2001 and FEMA 450[J].Industrial Construction,2009(6):79-83(in Chinese))
[13]付丽艳,赵艳,郭明珠,等.分析美国规范中场地条件对设计反应谱的影响[J].世界地震工程,2009(1):107-110(Fu Liyan,Zhao Yan,Guo Mingzhu,et al.Influenc ofsite conditions on response spectra for American seismildesign codes[J].World Earthquake Engineering,2009(1):107-110(in Chinese))
[14]郭明珠,陈厚群.场地类别划分与抗震设计反应谱的讨论[J].世界地震工程,2003,19(6):108-111(GuoMingzhu,Chen Houqun.Site categories and designearthquake response spectra[J].World EarthquakeEngineering,2003,9(6):108-111(in Chinese))
[15]黄雅虹,吕悦军,彭艳菊.国内外不同抗震设计规范中场地分类方法的内在关系研究[J].震灾防御技术,2009,4(1):80-90(Huang Yahong,LüYuejun,Peng Yanju.Studyon the relations of site classification methods in seismicdesign standards between China and abroad[J].Technology for Earthquake Disaster Prevention,2009,4(1):80-90(in Chinese))
[16]余湛,石树中,沈建文,等.从中国、美国、欧洲抗震设计规范反应谱的比较探讨我国的抗震设计反应谱[J].震灾防御技术,2008,3(2):136-144(Yu Zhan,Shi Shuzhong,ShenJianwen,et al.Discussing the seismic response spectrum ofChina from the comparison of seismic codes of China,American and Europe[J].Technology for EarthquakeDisaster Prevention,2008,3(2):136-144(in Chinese))
[17]郭子雄,吕西林.国际上主要抗震规范的设计反应谱比较[J].工程力学,1999(增):538-544(Guo Zixiong,LüXilin.Composition of major international seismic designresponse[J].Engineering Mechanics,1999(S):538-544(in Chinese))
[18]GB 50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2008(GB 50011—2001 Code for seismicdesign of buildings[S].Beijing:China Architecture&Building Press,2008(in Chinese))
[19]GB 50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002(GB 50010—2002 Code for designof concrete structures[S].Beijing:China Architecture&Building Press,2002(in Chinese))
[20]ASCE/SEI 7-05 Minimum design loads for buildings andother structures[S].American Society of Civil Engineers(ASCE),2005
[21]Building code requirements for structural concrete ACI318M-05[S].American Concrete Institute,FarmingtonHill,Mi,2005
[22]中华人民共和国防震减灾法[M].北京:中国法制出版社,2009(Protecting against and mitigating earthquakedisasters of the People's Republic of China[M].Beijing:China Legal Publishing House,2009(in Chinese))
[23]中国地震局令(第7号).建设工程抗震设防要求管理规定[EB/OL].http://www.gov.cn/gongbao/content/2003/content_62204.htm(Command of State SeismologicalBureau(No.7).Construction Engineering Anti-SeismicRequirement Management Regulations[EB/OL].http://www.gov.cn/gongbao/content/2003/content_62204.htm(in Chinese))
[24]国家地震局.中国地震烈度区划图(附说明书)[M].北京:地震出版社,1991(State Seismological Bureau.Generality of the map of China earthquake intensityzonation(full directions inside)[M].Beijing:Seismological Press,1991(in Chinese))
[25]GB 18306—2001中国地震动参数区划图[S].北京:中国标准出版社,2001(GB 18306—2001 Seismic groundmotion parameter zonation map of China[S].Beijing:Standards Press of China,2001(in Chinese))
[26]GB/T 17742—2008中国地震烈度表[S].北京:中国标准出版社,2009(GB/T 17742—2008 The Chineseseismic intensity scale[S].Beijing:Standards Press ofChina,2009(in Chinese))
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