钢框架结构典型震害的计算机模拟研究
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摘要
为模拟钢框架结构的典型震害,本文基于ANSYS软件建立了钢框架结构简化模型。该模型可以考虑楼板对钢框架结构整体性能的影响,并且进一步考虑了楼板与钢梁之间的滑移、节点域变形,以及梁柱节点焊缝的断裂等因素。应用本文建立的钢框架结构模型对北岭地震中Blue Cross大厦的震害进行了模拟,与实际震害对比的结果表明,该模型能够比较精确地模拟地震作用下钢框架结构的响应。钢框架结构模型对节点焊缝断裂的钢框架结构震害研究有着重要的意义。
The authors aim to simulate the typical seismic damage to steel frame structures.For this purpose,an analytical approach was proposed for making the seismic evaluation of welded steel frame structures based on ANSYS computer program.The effect of slabs on the response of steel frame structures was investigated.Further more,the model considered the slip between slabs and steel beams,deformation of panel zone and connection fractures.The model was employed in the simulation of seismic damage to Blue Cross Building,the connections of which were fractured in the Northridge earthquake.Results from several analyses indicate that the model can accurately predict the earthquake responses.The approach proposed in this paper has important meaning in the research on the seismic damage to steel frame,the connections of which may be fractured.
The authors aim to simulate the typical seismic damage to steel frame structures.For this purpose,an analytical approach was proposed for making the seismic evaluation of welded steel frame structures based on ANSYS computer program.The effect of slabs on the response of steel frame structures was investigated.Further more,the model considered the slip between slabs and steel beams,deformation of panel zone and connection fractures.The model was employed in the simulation of seismic damage to Blue Cross Building,the connections of which were fractured in the Northridge earthquake.Results from several analyses indicate that the model can accurately predict the earthquake responses.The approach proposed in this paper has important meaning in the research on the seismic damage to steel frame,the connections of which may be fractured.
引文
[1]李国强,孙飞飞.关于钢结构抗震存在的问题及建议[J].地震工程与工程振动,2006,26(3):108-114.
[2]Matos C G,Dodds Jr.Probabilistic modeling of weld fracture in steel frame connections part I:quasi-static loading[J].Engineering Structures,2001,23:1011-1030.
[3]Xie Li Li.Earthquake engineering frontiers in the new millennium[M].A A Balkema Publisher,2001:7-13.
[4]Amadio C,Fragiacomo M.Effective width evaluation for steel-concrete composite beams[J].Journal of Constructional Steel Research,2002,58:373-388.
[5]Amadio C,Fedrigo C,Fragiacomo M,et al.Experimental evaluation of effective width in steel-concrete composite beams[J].Journal of Construc-tional Steel Research,2004,60:199-220.
[6]聂建国.钢-混凝土组合结构[M].北京:科学出版社,2005:57-62.
[7]Liu Hongbo,Zhai Changhai,Shao Yongsong,et al.Finite element fracture mechanics study of Pre-Northridge connections[J].Key EngineeringMaterials,2006,325:1007-1010.
[8]刘洪波,谢礼立,邵永松.钢框架节点焊缝应力强度因子的参数分析[J].浙江大学学报,2007,41(1):40-43.
[9]刘洪波,谢礼立,邵永松.钢框架节点域分析简化模型[J].哈尔滨商业大学学报,2005,21(5):629-631.
[10]Bursi O S,Sun Fei-Fei,Posal S.Non-linear analysis of steel-concrete composite frames with full and partial shear connection subjected to seismicloads[J].Journal of Constructional Steel Research,2005,61:67-92.
[11]Uang Chia-Ming,Yu Qi-Song,Sadre Ali,et al.Seismic response of an instrumented 13-story steel frame building damaged in the 1994 NorthridgeEarthquake[J].Earthquake Spectra,1997,13(1):131-149.
[12]Chi Wei-ming,Gregory G,Deierlein P E,et al.Fracture toughness demands in welded beam-column moment connections[J].Journal of Structur-al Engineering,2000,126(1):88-97.
[2]Matos C G,Dodds Jr.Probabilistic modeling of weld fracture in steel frame connections part I:quasi-static loading[J].Engineering Structures,2001,23:1011-1030.
[3]Xie Li Li.Earthquake engineering frontiers in the new millennium[M].A A Balkema Publisher,2001:7-13.
[4]Amadio C,Fragiacomo M.Effective width evaluation for steel-concrete composite beams[J].Journal of Constructional Steel Research,2002,58:373-388.
[5]Amadio C,Fedrigo C,Fragiacomo M,et al.Experimental evaluation of effective width in steel-concrete composite beams[J].Journal of Construc-tional Steel Research,2004,60:199-220.
[6]聂建国.钢-混凝土组合结构[M].北京:科学出版社,2005:57-62.
[7]Liu Hongbo,Zhai Changhai,Shao Yongsong,et al.Finite element fracture mechanics study of Pre-Northridge connections[J].Key EngineeringMaterials,2006,325:1007-1010.
[8]刘洪波,谢礼立,邵永松.钢框架节点焊缝应力强度因子的参数分析[J].浙江大学学报,2007,41(1):40-43.
[9]刘洪波,谢礼立,邵永松.钢框架节点域分析简化模型[J].哈尔滨商业大学学报,2005,21(5):629-631.
[10]Bursi O S,Sun Fei-Fei,Posal S.Non-linear analysis of steel-concrete composite frames with full and partial shear connection subjected to seismicloads[J].Journal of Constructional Steel Research,2005,61:67-92.
[11]Uang Chia-Ming,Yu Qi-Song,Sadre Ali,et al.Seismic response of an instrumented 13-story steel frame building damaged in the 1994 NorthridgeEarthquake[J].Earthquake Spectra,1997,13(1):131-149.
[12]Chi Wei-ming,Gregory G,Deierlein P E,et al.Fracture toughness demands in welded beam-column moment connections[J].Journal of Structur-al Engineering,2000,126(1):88-97.
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