人字形中心支撑钢框架近场地震下层剪力分布
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摘要
为研究人字形中心支撑钢框架(CBSF)弹塑性状态下层剪力分布,设计了6个具有理想屈服模式的CBSF结构,采用非线性动力时程分析法获得了结构在近场地震下的层剪力分布,提出了层剪力分布模式,并同已有的层剪力分布模式进行了对比。分析表明,近场速度脉冲效应对CBSF结构层剪力分布影响较大;提出的层剪力分布模式在精度上优于已有的层剪力分布模式。
In order to investigate the story shear distribution of CBSF in elasto-plastic state under near-fault earthquakes, six CBSF structures with ideal yield mechanism were designed, and the story shear distribution in CBSF structures under near-field earthquakes was obtained through the nonlinear time history method. The story shear distribution in CBSF was proposed, and was also compared with the existing horizontal seismic shear distri-bution pattern. The analysis showed that near-field earthquakes with velocity pulse had important effect on the story shear distribution in CBSF. The story shear distribution proposed by this paper was more accurate than the existing story shear distribution patterns.
In order to investigate the story shear distribution of CBSF in elasto-plastic state under near-fault earthquakes, six CBSF structures with ideal yield mechanism were designed, and the story shear distribution in CBSF structures under near-field earthquakes was obtained through the nonlinear time history method. The story shear distribution in CBSF was proposed, and was also compared with the existing horizontal seismic shear distri-bution pattern. The analysis showed that near-field earthquakes with velocity pulse had important effect on the story shear distribution in CBSF. The story shear distribution proposed by this paper was more accurate than the existing story shear distribution patterns.
引文
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[2]Shih-Ho Chao.A seismic design lateral force distribution based on inelastic state of structures[J].Earthquake Spectra,2007,23(3):547-569.
[3]拾宝童,顾强.钢框架-钢板剪力墙用于抗震设计的层间剪力分布[J].苏州科技学院学报:工程技术版,2011,24(1):45-49.
[4]中国建筑科学研究院.GB 50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[5]EEAOC Blue Book,Recommended lateral force requirements and commentary[R].Seismology Committee Structural Engineers Association of California,1966.
[6]Federal Emergency Management Agency.FEMA 302,NEHRP recommended provisions for seismic regulations for new buildings and other structures[S].Washington,USA,1997.
[7]European Committee for Standardization.Eurocode-8,Design of Structures for Earthquake resistance[S].Brussels,2003.
[8]中华人民共和国住房和城乡建设部.GB 50009-2012建筑结构荷载规范[S].北京:中国建筑工业出版社,2012.
[9]中华人民共和国建设部.GB 50017-2003钢结构设计规范[S].北京:中国建筑工业出版社,2003.
[10]中国建筑科学研究院.JGJ 99-98高层民用建筑钢结构技术规程[S].北京:中国建筑工业出版社,1998.
[11]杨迪雄,李刚,程迪东.近场脉冲型地震动作用下隔震结构地震反应分析[J].地震工程与工程振动,2005,2(2):119-124.
[12]高学奎,朱晞.近场地震动输入问题的研究[J].华北科技学院学报,2005,2(3):80-83.
[13]李爽,谢礼立.近场问题的研究现状与发展方向[J].地震学报,2007,29(1):102-109.
[14]ATC-63,Quantification of building seismic performance factors[R]//ATC-63 Project Report.FEMA P690,2008.
[15]杨俊芬,顾强,万红,等.受压支撑屈曲后剩余承载能力探讨[J].工业建筑,2011,41(4):124-128.
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