空间框架抗连续倒塌分析
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摘要
因结构局部破坏后荷载沿不同方向传递引起内力重分布,空间结构分析在连续倒塌研究中具有重要意义。该文为研究框架结构抵抗连续倒塌的特点,使用线性静力方法分析了空间钢框架撤柱后的受力性能,与单榀框架撤柱分析进行了比较,并研究了不同平面布置形式对最大需求能力比DCR(demand for the capacity ratio)的影响。研究结果表明,比较单榀框架和空间框架分析,最大DCR出现在空间分析中,结构整体布置形式与长跨、短跨布置形式共同影响结构最大DCR所在位置。
The spacial analysis of structures has great significance in the research on progressive collapse because the load transfers along different directions and results in the redistribution of internal force after local failures in structures.To investigate the characteristics of progressive collapse resistance of frames,the paper analyzed the mechanical behaviors of space steel frames with specific removed columns and compared the spacial analysis with the analysis of a single frame with removed columns.The influence of different plane layout forms on the maximum demand for the capacity ratio was also studied.It was shown that the maximum demand for the capacity ratio appeared in the spacial analysis comparing the analysis of the single frame with the spacial analysis,and that the location of the maximum demand for the capacity ratio was jointly affected by layout forms of the structure and the span in the results.
The spacial analysis of structures has great significance in the research on progressive collapse because the load transfers along different directions and results in the redistribution of internal force after local failures in structures.To investigate the characteristics of progressive collapse resistance of frames,the paper analyzed the mechanical behaviors of space steel frames with specific removed columns and compared the spacial analysis with the analysis of a single frame with removed columns.The influence of different plane layout forms on the maximum demand for the capacity ratio was also studied.It was shown that the maximum demand for the capacity ratio appeared in the spacial analysis comparing the analysis of the single frame with the spacial analysis,and that the location of the maximum demand for the capacity ratio was jointly affected by layout forms of the structure and the span in the results.
引文
[1]龚顺风,金伟良,何勇.爆炸荷载作用下建筑结构倒塌的致命率[J].浙江大学学报(工学版),2007,41(7):1154―1158.Gong Shunfeng,Jin Weiliang,He Yong.Lethality rate of building collapse to blast loading[J].Journal of Zhejiang University(Engineering Science),2007,41(7):1154―1158.(in Chinese)
[2]邢甫庆,陈道政.四层RC框架结构抗连续性倒塌分析[J].安徽建筑工业学院学报(自然科学版),2009,17(5):31―35.Xing Fuqing,Chen Daozheng.Analysis to resist progressive collapse for a four-story RC frame[J].Journal of Anhui Institute of Architecture&Industry(Natural Science),2009,17(5):31―35.(in Chinese)
[3]Shalva Marijanishvili,Elizabeth Agnew.Comparison of various procedures for progressive collapse analysis[J].Journal of Performance of Constructed Facilities,2006,20(4):365―374.
[4]Progressive collapse analysis and design guidelines for new federal office buildings and major modernization projects[S].U.S.:General Service Administration,2003.
[5]洪武,徐迎,贾金刚,李洋.动力备用荷载路径法的力学机理分析[J].工程抗震与加固改造,2009,31(3):56―60.Hong Wu,Xu Ying,Jia Jingang,Li Yang.Dynamic model of alternative load path for structural progressive collapse[J].Earthquake Resistant Engineering and Retrofitting,2009,31(3):56―60.(in Chinese)
[6]钱稼茹,胡晓斌.多层钢框架连续倒塌动力效应分析[J].地震工程与工程振动,2008,28(2):8―14.Qian Jiaru,Hu Xiaobin.Dynamic effect analysis of progressive collapse of multi-story steel frames[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(2):8―14.(in Chinese)
[7]Mehrdad Sasani,Serkan Sagiroglu.Progressive collapse resistance of Hotel San Diego[J].Journal of Structural Engineering,2008,134(3):478-488.
[8]Brian I Song,Halil Sezen.Evaluation of an existing steel frame building against progressive collapse[C].Proceedings of 2009 Structures Congress.Austin,Texas,2009:1878―1885.
[9]吕大刚,于晓辉,王光远.基于单地震动记录IDA方法的结构倒塌分析[J].地震工程与工程振动,2009,29(6):33―39.Lu Dagang,Yu Xiaohui,Wang Guangyuan.Structural collapse analysis based on single-record IDA method[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(6):33―39.(in Chinese)
[10]Unified Facilities Criteria:Design of structures to resist progressive collapse[S].U.S.:Department of Defense,2005.
[2]邢甫庆,陈道政.四层RC框架结构抗连续性倒塌分析[J].安徽建筑工业学院学报(自然科学版),2009,17(5):31―35.Xing Fuqing,Chen Daozheng.Analysis to resist progressive collapse for a four-story RC frame[J].Journal of Anhui Institute of Architecture&Industry(Natural Science),2009,17(5):31―35.(in Chinese)
[3]Shalva Marijanishvili,Elizabeth Agnew.Comparison of various procedures for progressive collapse analysis[J].Journal of Performance of Constructed Facilities,2006,20(4):365―374.
[4]Progressive collapse analysis and design guidelines for new federal office buildings and major modernization projects[S].U.S.:General Service Administration,2003.
[5]洪武,徐迎,贾金刚,李洋.动力备用荷载路径法的力学机理分析[J].工程抗震与加固改造,2009,31(3):56―60.Hong Wu,Xu Ying,Jia Jingang,Li Yang.Dynamic model of alternative load path for structural progressive collapse[J].Earthquake Resistant Engineering and Retrofitting,2009,31(3):56―60.(in Chinese)
[6]钱稼茹,胡晓斌.多层钢框架连续倒塌动力效应分析[J].地震工程与工程振动,2008,28(2):8―14.Qian Jiaru,Hu Xiaobin.Dynamic effect analysis of progressive collapse of multi-story steel frames[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(2):8―14.(in Chinese)
[7]Mehrdad Sasani,Serkan Sagiroglu.Progressive collapse resistance of Hotel San Diego[J].Journal of Structural Engineering,2008,134(3):478-488.
[8]Brian I Song,Halil Sezen.Evaluation of an existing steel frame building against progressive collapse[C].Proceedings of 2009 Structures Congress.Austin,Texas,2009:1878―1885.
[9]吕大刚,于晓辉,王光远.基于单地震动记录IDA方法的结构倒塌分析[J].地震工程与工程振动,2009,29(6):33―39.Lu Dagang,Yu Xiaohui,Wang Guangyuan.Structural collapse analysis based on single-record IDA method[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(6):33―39.(in Chinese)
[10]Unified Facilities Criteria:Design of structures to resist progressive collapse[S].U.S.:Department of Defense,2005.
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