强震下砌体结构倒塌过程预测及其合理性分析
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摘要
为了使用计算机仿真技术对一些因条件限制而不能完成的工作进行试验模拟、灾害预测、结构性能评估等,利用显示动力有限元软件ANSYS/LS-DYNA模拟某2层带构造柱的砌体结构振动台试验模型倒塌的过程,同时,通过模态和动力时程分析对结构的周期、振型、加速度、应力应变及位移等进行了分析,并和振动台试验结果进行了对比。结果显示,采用合适的材料模型和失效准则,ANSYS/LS-DYNA能很好地模拟倒塌过程,动力时程分析的结果和试验吻合,验证了上述倒塌过程模拟的合理性,体现了数值振动台的作用。
To make the wide application of the computer simulation technology in test simulation,disaster prediction and structure performance evaluation restrained by some conditions,explicit dynamic finite element analysis software ANSYS / LS-DYNA was used to simulate the collapse process of masonry structure.The model has two stories and is restrained by four core-tie-columns which is tested by shaking table.Then,modal analysis and time-history analysis were carried out.The periods,vibration modes,acceleration responses,plastic strains and deformation of the model were analyzed.Meanwhile,the analysis results were compared with the results from the shaking table test of the same model.The results show that the software can simulate the collapse process well when the suitable material model and failure criterion are used.The reasonableness of the simulating is verified by the analysis results and agrees with the results from the shaking table test.The effect of "numerical shaking table" could be displayed by software.
To make the wide application of the computer simulation technology in test simulation,disaster prediction and structure performance evaluation restrained by some conditions,explicit dynamic finite element analysis software ANSYS / LS-DYNA was used to simulate the collapse process of masonry structure.The model has two stories and is restrained by four core-tie-columns which is tested by shaking table.Then,modal analysis and time-history analysis were carried out.The periods,vibration modes,acceleration responses,plastic strains and deformation of the model were analyzed.Meanwhile,the analysis results were compared with the results from the shaking table test of the same model.The results show that the software can simulate the collapse process well when the suitable material model and failure criterion are used.The reasonableness of the simulating is verified by the analysis results and agrees with the results from the shaking table test.The effect of "numerical shaking table" could be displayed by software.
引文
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[9]刘桂秋.砌体结构基本受力性能的研究[D].长沙:湖南大学,2005.
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[11]李英民,韩军,刘立平.ANSYS在砌体结构非线性有限元分析中的应用研究[J].重庆建筑大学学报,2006,28(5):90-96.LI Yingmin,HAN Jun,LIU Liping.Application ofANSYS to nonlinear finite element analysis for mason-ry structures[J].Journal of Chongqing Jianzhu Uni-versity,2006,28(5):90-96.(in Chinese).
[2]张雷明,刘西拉.框架结构倒塌分析中的几个问题[J].上海交通大学学报,2001,35(10):1578-1582.ZHANG Leiming,LIU Xila.Some issues in the col-lapse analysis of frame structures[J].Journal ofShanghai Jiaotong University,2001,35(10):1578-1582.(in Chinese).
[3]刘海卿,倪镇国,欧进萍.强震作用下砌体结构倒塌过程仿真分析[J].地震工程与工程振动,2008,28(5):38-42.LIU Haiqing,NI Zhenguo,OU Jinping.Simulationanalysis of the collapse response of masonry structuressubjected to strong ground motion[J].Journal ofEarthquake Engineering and Engineering Vibration,2008,28(5):38-42.(in Chinese).
[4]林旭川,陆新征,叶列平.砌体结构的地震倒塌模拟与分析:汶川地震建筑震害调查与灾后重建分析报告[R].北京:清华大学出版社,2008.
[5]彭斌,顾祥林,苗吉军,等.砌体结构倒塌反应的图形仿真技术[J].同济大学学报:自然科学版,2004,32(10):1304-1309.PENG Bin,GU Xianglin,MIAO Jijun,et al.Graphicsimulation technology for collapse response analysis ofmasonry structures[J].Journal of Tongji University(Natural Science),2004,32(10):1304-1309.(in Chi-nese).
[6]BOCCA P,CARPINTERI A,VALENTE S.Fracturemechanics of brick masonry:Size effects and snap-backanalysis[J].Materials and Structures,1989,22(5):364-373.
[7]孔丹丹,赵颖华,王萍,等.仿真计算中钢筋混凝土材料的等效模量[J].沈阳建筑工程学院学报,2003,19(3):165-168.KONG Dandan,ZHAO Yinghua,WANG Ping,et al.Equivalent moduli of reinforced concrete in simulatinganalysis[J].Journal of Shenyang Arch and Civ EngUniv,2003,19(3):165-168.(in Chinese).
[8]董海明,宋丽.砌体结构设计原理[M].西安:西安交通大学出版社,2010.
[9]刘桂秋.砌体结构基本受力性能的研究[D].长沙:湖南大学,2005.
[10]施楚贤.砌体结构理论与设计[M].2版.北京:中国建筑工业出版社,2003.
[11]李英民,韩军,刘立平.ANSYS在砌体结构非线性有限元分析中的应用研究[J].重庆建筑大学学报,2006,28(5):90-96.LI Yingmin,HAN Jun,LIU Liping.Application ofANSYS to nonlinear finite element analysis for mason-ry structures[J].Journal of Chongqing Jianzhu Uni-versity,2006,28(5):90-96.(in Chinese).
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