大型岸桥地震反应分析中阻尼模型的讨论
|
摘要
以现有的条件无法对大型结构进行地震试验,只能采取缩比模型试验配合有限元时程分析。以某岸桥结构为例,进行时程数值计算时阻尼模型在很大程度上影响计算的精度。采用工程上最常用的4种不同Rayleigh阻尼模型对岸桥1:15缩比模型进行了时程动力分析,并同振动台地震模拟试验所得的试验值进行了比较,选出与试验结果最相近的阻尼模型。将该阻尼模型用在岸桥原型的动力时程分析中,将所得结果进行相似系数变换后,与缩比模型试验结果进行比较。结果显示岸桥原型采用该阻尼模型进行动力时程分析与试验之间的误差在许可范围之内,说明采用该阻尼模型是正确的,同时也验证了缩比模型的可靠性。
It is difficult to make seismic tests for large-scale structures, so, the proportionally reduced model and finite element method can be applied to time-history test and analysis of the structures. In the numerical analysis of the structure of a container crane, it was found that the damping model had a significant effect on the computation accuracy for the time-history analysis. Then, four different conventional Rayleigh damping models were employed for time-history dynamic analysis for the 1:15 scaled model of the container crane. The results were compared with the measurement data obtained in the earthquake simulation testing. The damping model which results were closest to the measurement data in the testing was chosen and applied to the time-history dynamic analysis of the container crane prototype. After the similarity factor transformation,the results were compared with those of the scaled model test. It was found that the tolerance between the two results was within the allowable range, which means that this damping model is correct and the reliability of the scaled model is verified.
It is difficult to make seismic tests for large-scale structures, so, the proportionally reduced model and finite element method can be applied to time-history test and analysis of the structures. In the numerical analysis of the structure of a container crane, it was found that the damping model had a significant effect on the computation accuracy for the time-history analysis. Then, four different conventional Rayleigh damping models were employed for time-history dynamic analysis for the 1:15 scaled model of the container crane. The results were compared with the measurement data obtained in the earthquake simulation testing. The damping model which results were closest to the measurement data in the testing was chosen and applied to the time-history dynamic analysis of the container crane prototype. After the similarity factor transformation,the results were compared with those of the scaled model test. It was found that the tolerance between the two results was within the allowable range, which means that this damping model is correct and the reliability of the scaled model is verified.
引文
[1]李哲,王贡献,王东,等.大型集装箱起重机地震动力学行为试验方法研究[J].武汉理工大学学报,2013,35(8):72-76.
[2]楼梦麟,张静.大跨度拱桥地震反应分析中阻尼模型的讨论[J].振动与冲击,2009,28(5):23-28.
[3]Jin Y L,Li Z G.Theoretical design and experimental verification of a 1/50 scale model of a quayside container crane[J].Proceedings of the Institution of Mechanical Engineers,Part C:Journal of Mechanical Engineering Science,2012,226(6):1644-1662.
[4]L D Jacobs,Reginald DesRoches,Roberto T Leon.Seismic behavior of a jumbo container crane including uplift[J].Earthquake spectra,2011,27(3),745-773.
[5]L D Jacobs,Reginald DesRoches,Roberto T Leon.Experimental study of the seismic response of container cranes[J].Ports 2010:Building on the Past,Respecting the Future 210 Don't Mess with Structural Engineers 2010ASCE,91-99.
[6]邹德高,徐斌,孔宪京.瑞利阻尼系数确定方法对高土石坝地震反应的影响研究[J].岩土力学,2011,32(3):797-803.
[7]Yoshida N,Kobayashi S,Suetomi I,et al.Equivalent linear method considering frequency dependent characteristics of stiffness and damping[J].Soil Dynamics and Earthquake Engineering,2002,22(3):205-222.
[8]Hudson M,Idriss I M,Beikae M.User manual for QUAD4 m:A computer program to evaluate the seismic response of soil structures using finite element procedures and incorporating a compliant base[D]:Berkeley:University of California,1994.
[9]吕平,高金岗,李晶,等.影响约束阻尼结构阻尼性能的因素[J].噪声与振动控制,2014,34(5):234-238.
[10]金玉龙,吴天行.集装箱码头岸桥结构的动力相似分析与试验验证[J].上海交通大学学报(自然科学版),2012,46(10):1609-1615.
[2]楼梦麟,张静.大跨度拱桥地震反应分析中阻尼模型的讨论[J].振动与冲击,2009,28(5):23-28.
[3]Jin Y L,Li Z G.Theoretical design and experimental verification of a 1/50 scale model of a quayside container crane[J].Proceedings of the Institution of Mechanical Engineers,Part C:Journal of Mechanical Engineering Science,2012,226(6):1644-1662.
[4]L D Jacobs,Reginald DesRoches,Roberto T Leon.Seismic behavior of a jumbo container crane including uplift[J].Earthquake spectra,2011,27(3),745-773.
[5]L D Jacobs,Reginald DesRoches,Roberto T Leon.Experimental study of the seismic response of container cranes[J].Ports 2010:Building on the Past,Respecting the Future 210 Don't Mess with Structural Engineers 2010ASCE,91-99.
[6]邹德高,徐斌,孔宪京.瑞利阻尼系数确定方法对高土石坝地震反应的影响研究[J].岩土力学,2011,32(3):797-803.
[7]Yoshida N,Kobayashi S,Suetomi I,et al.Equivalent linear method considering frequency dependent characteristics of stiffness and damping[J].Soil Dynamics and Earthquake Engineering,2002,22(3):205-222.
[8]Hudson M,Idriss I M,Beikae M.User manual for QUAD4 m:A computer program to evaluate the seismic response of soil structures using finite element procedures and incorporating a compliant base[D]:Berkeley:University of California,1994.
[9]吕平,高金岗,李晶,等.影响约束阻尼结构阻尼性能的因素[J].噪声与振动控制,2014,34(5):234-238.
[10]金玉龙,吴天行.集装箱码头岸桥结构的动力相似分析与试验验证[J].上海交通大学学报(自然科学版),2012,46(10):1609-1615.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心