不同支撑复合结构抗震性能研究
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摘要
采用有限元分离式实体对多层住宅复合结构进行建模分析,并将模拟结果与水平低周反复荷载试验结果进行对比。结果表明,该模型在裂缝出现的位置、顺序和试验构件基本一致,滞回曲线、骨架曲线和试验结果基本吻合,开裂荷载、屈服荷载和极限荷载的计算值与试验值也符合较好,这说明该有限元模型能够较准确模拟试验结果。在此基础上,研究了八字支撑、窗洞口上方局部设置人字支撑复合结构的抗震性能,得到了不同支撑复合结构的裂缝出现情况、破坏形态、滞回曲线、骨架曲线及承载力,并比较分析了其抗震能力,为复合结构的工程应用提供了理论依据。
Finite element solid model is adopted to analysis a compound structure of multi-storey residence,and the simulated results are compared with experimental results under laterally reversed low-cyclic loading.Analysis results indicate that the positions and orders of cracks simulated by separate model coincide with those of tests.Hysteresis curves and skeleton curves are consistent with experimental values.The finite element results on cracking load,yield load and ultimate load are in good agreement with experimental results.Therefore,the finite element analytical model is able to simulate test results accurately.Moreover,seismic behavior of the compound structure with splayed braces and herringbone braces over windows are studied.The crack positions,hysteresis curves,skeleton curves and anti-seismic capacity of compound structures with different braces are obtained,the anti-seismic capacity of these compound structures are compared,which will provide a certain theoretical basis for engineering applications.
Finite element solid model is adopted to analysis a compound structure of multi-storey residence,and the simulated results are compared with experimental results under laterally reversed low-cyclic loading.Analysis results indicate that the positions and orders of cracks simulated by separate model coincide with those of tests.Hysteresis curves and skeleton curves are consistent with experimental values.The finite element results on cracking load,yield load and ultimate load are in good agreement with experimental results.Therefore,the finite element analytical model is able to simulate test results accurately.Moreover,seismic behavior of the compound structure with splayed braces and herringbone braces over windows are studied.The crack positions,hysteresis curves,skeleton curves and anti-seismic capacity of compound structures with different braces are obtained,the anti-seismic capacity of these compound structures are compared,which will provide a certain theoretical basis for engineering applications.
引文
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[8]王新玲,杨建中,张严,等.人字支撑复合结构的合理耗能机制选择分析[J].工业建筑,2007,37(11):42-46(Wang Xinling,Yang Jianzhong,Zhang Yan,et al.Thepushover analysis and optimization of energy dissipationmechanism for chevron bracing compound structure[J].Industrial Construction,2007,37(11):42-46(inChinese))
[2]王新玲,赵更奇,杨广宁.带“人字”支撑的新型复合结构体系动力特征研究[J].世界地震工程,2004,20(2):69-72(Wang Xinling,Zhao Gengqi,YangGuangning.A study of dynamic characteristics for a newcompound structural system with“Λ”braces[J].WorldEarthquake Engineering,2004,20(2):69-72(inChinese))
[3]王新玲,赵更歧,张海东.多层住宅新型复合结构的抗震试验研究[J].土木工程学报,2006,39(8):51-56(Wang Xinling,Zhao Gengqi,Zhang Haidong.Anexperimental study on the earthquake resistance of novelmultistory composite structures[J].China CivilEngineering Journal,2006,39(8):51-56(in Chinese))
[4]王新玲,刘伟,曹双寅.新型复合结构拟静力试验的变形和裂缝[J].东南大学学报:自然科学版,2007,37(6):1036-1040(Wang Xinling,Liu Wei,Cao Shuangyin.Deformation and cracks on new compound structure underlow-cycle and repeated load[J].Journal of SoutheastUniversity:Natural Science Edition,2007,37(6):1036-1040(in Chinese))
[5]Colajanni P.Braced frames with hysteretic dissipativedevices:Seismic response and design criteria[J].Journalof Earthquake Engineering,1999,3(01):33-57
[6]Fahnestock L A,Sause R,Ricles J M,et al.Ductilitydemands on buckling-restrained braced frames underearthquake loading[J].Earthquake Engineering andEngineering Vibration,2003,2(2):255-268
[7]王新玲,曹双寅,张海东.竖向荷载下新型住宅复合结构试验研究[J].东南大学学报:自然科学版,2005,35(增1):61-65(Wang Xinling,Cao Shuangyin,ZhangHaidong.Experimental study of new compound structure formulti-story residence under vertical loads[J].Journal ofSoutheast University:Natural Science Edition,2005,35(S1):61-65(in Chinese))
[8]王新玲,杨建中,张严,等.人字支撑复合结构的合理耗能机制选择分析[J].工业建筑,2007,37(11):42-46(Wang Xinling,Yang Jianzhong,Zhang Yan,et al.Thepushover analysis and optimization of energy dissipationmechanism for chevron bracing compound structure[J].Industrial Construction,2007,37(11):42-46(inChinese))
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