地震作用下冷弯薄壁型钢结构房屋弹塑性位移简化计算研究
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摘要
针对地震作用下冷弯薄壁型钢结构房屋弹塑性位移的简化计算,基于层间剪切模型和冷弯薄壁型钢组合墙体的恢复力模型,对2层～7层冷弯薄壁型钢结构房屋进行弹塑性时程分析。通过对滞回耗能沿楼层高度分布规律的研究,确定了冷弯薄壁型钢结构房屋薄弱楼层的位置;研究了楼层屈服剪力系数、楼层数、结构自振周期和不同地震记录对弹塑性层间位移增大系数的影响;通过大量参数统计分析,提出了冷弯薄壁型钢结构房屋弹塑性层间位移增大系数与楼层屈服剪力系数和楼层数的定量关系,为罕遇地震作用下冷弯薄壁型钢结构房屋弹塑性位移验算提供依据。
Based on a shearing storey model and a hysteretic model of cold-formed thin-walled steel stud walls,the simplified calculation of the elastoplastic displacement for cold-formed thin-walled steel buildings is studied by the elastoplastic time history analysis on two-storey buildings to seven-storey buildings.The weak storey is suggested by analyzing the distribution of hysteretic energy in the height of a storey.The influences of storey yielding shear force factors,storey numbers,fundamental periods of structures and different seismic records on elastoplastic displacement amplification factors are studied.The quantitative relations among storey yielding shear force factors,storey numbers and elastoplastic displacement amplification factors are proposed to estimate the elastoplastic displacement for cold-formed thin-walled steel buildings under rare earthquakes.
Based on a shearing storey model and a hysteretic model of cold-formed thin-walled steel stud walls,the simplified calculation of the elastoplastic displacement for cold-formed thin-walled steel buildings is studied by the elastoplastic time history analysis on two-storey buildings to seven-storey buildings.The weak storey is suggested by analyzing the distribution of hysteretic energy in the height of a storey.The influences of storey yielding shear force factors,storey numbers,fundamental periods of structures and different seismic records on elastoplastic displacement amplification factors are studied.The quantitative relations among storey yielding shear force factors,storey numbers and elastoplastic displacement amplification factors are proposed to estimate the elastoplastic displacement for cold-formed thin-walled steel buildings under rare earthquakes.
引文
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[11]Serrette R L,Ogunfuni K.Shear resistance ofgypsum-sheathed light gauge steel stud walls[J].Journalof Structural Engineering,1996,122(4):386―389.
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[2]JGJ227-2011,低层冷弯薄壁型钢房屋建筑技术规程[S].北京:中国建筑工业出版社,2011.JGJ 227-2011,Technical specification for low-risecold-formed thin-walled steel buildings[S].Beijing:China Architecture&Building Press,2011.(in Chinese)
[3]何广乾,魏琏,戴国莹.论地震作用下多层剪切型结构的弹塑性变形计算[J].土木工程学报,1982,15(3):10―19.He Guangqian,Wei Lian,Dai Guoying.On elasto-plasticdeformations of multi-story shear type structures due toearthquake effect[J].China Civil Engineering Journal,1982,15(3):10―19.(in Chinese)
[4]陈光华.地震作用下多层剪切型结构弹塑性位移反应的简化计算[J].建筑结构学报,1984,5(2):45―57.Chen Guanghua.Simplified calculation of elastoplasticstory drift responses of multi-story shear type structuressubjected to earthquakes[J].Journal of BuildingStructures,1984,5(2):45―57.(in Chinese)
[5]高小旺.地震作用下多层剪切型结构弹塑性位移反应的实用计算方法[J].土木工程学报,1984,17(3):79―87.Gao Xiaowang.Applied method of seismic inelasticresponse of lumped mass MDOF system[J].China CivilEngineering Journal,1984,17(3):79―87.(in Chinese)
[6]李国强,冯健.罕遇地震下多高层建筑钢结构弹塑性位移的实用计算[J].建筑结构学报,2000,21(1):77―83.Li Guoqiang,Feng Jian.A practical approach forestimating elastoplastic displacements of multistory andtall steel buildings under severe earthquakes[J].Journalof Building Structures,2000,21(1):77―83.(in Chinese)
[7]Ye L P,Otani S.Maximum seismic displacement ofinelastic systems based on energy concept[J].Earthquake Engineering and Structure Dynamics,1999(6):1483―1499.
[8]经杰,叶列平,钱稼茹.基于能量概念的剪切型多自由度体系弹塑性地震位移反应分析[J].工程力学,2003,20(3):31―37.Jing Jie,Ye Lieping,Qian Jiaru.Inelastic seismicresponse of lumped mass MDOF systems based onenergy concept[J].Engineering Mechanics,2003,20(3):31―37.(in Chinese)
[9]周天华,石宇,何保康,等.冷弯型钢组合墙体抗剪承载力试验研究[J].西安建筑科技大学学报(自然科学版),2006,38(1):83―88.Zhou Tianhua,Shi Yu,He Baokang,et al.Experimentalresearch on the shear resistance of cold-formed steel studcomposed wall[J].Journal of Xi’an University ofArchitecture&Technology(Natural Science Edition),2002,38(1):83―88.(in Chinese)
[10]黄智光,苏明周,何保康,等.冷弯薄壁型钢三层房屋振动台试验研究[J].土木工程学报,2011,44(2):73―81.Huang Zhiguang,Su Mingzhou,He Baokang,et al.Shaking table test on seismic behaviors of three-storycold-formed thin-wall steel residential buildings[J].China Civil Engineering Journal,2011,44(2):73―81.(in Chinese)
[11]Serrette R L,Ogunfuni K.Shear resistance ofgypsum-sheathed light gauge steel stud walls[J].Journalof Structural Engineering,1996,122(4):386―389.
[12]Seneviratna G D P K,Krawinkler H.Evaluation ofinelastic MDOF effects for seismic design[R].Department of Civil and Environmental Engineering,Stanford University:Report No.120,1997.
[13]Akiyama Hiroshi.Earthquake-resistant limit-state designfor building[M].Tokyo:University of Tokyo Press,1985.
[14]石宇,周绪红,聂少峰,等.冷弯薄壁型钢组合墙体的抗震性能研究[J].土木工程学报,2010,43(增刊):124―129.Shi Yu,Zhou Xuhong,Nie Shaofeng,et al.Research onthe seismic performance of cold-formed steel stud wall[J].China Civil Engineering Journal,2010,43(Suppl):124―129.(in Chinese)
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