地基-基础隔震系统整体地震响应有限元分析
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摘要
近几十年来,基础隔震技术逐渐被重视,得到了广泛的应用,并被纳入国家建筑抗震设计规范。但是在传统的理论分析中,对于基础隔震结构往往忽视土-结构动力相互作用对其隔震效果的影响。即使考虑地基的影响,也大都是采用弹簧和阻尼器(地基动刚度)代替。笔者运用ANSYS软件的二次开发功能,提出将结构、隔震层和地基结合起来作为一个完整系统分析,并对一叠层橡胶基础隔震7层钢筋混凝土框架结构在考虑土-结相互作用情况下,进行了整体地震响应有限元计算、比较、分析。结果表明进行地基-基础隔震系统整体地震响应有限元分析是完全可行的而且是必要的。
In recent decades, base isolation technology has attracted more and more attention in research. It has been adopted by national code for seismic des ign of buildings, and has been wildly applied to a broad range of applications w orldwide. However, in traditional theoretical analysis, the influence of the soi l-structure interaction on base isolation is often ignored. Even if the effect o f groundsill is considered, the groundsill is mostly simplified by springs and d ampers. This paper proposes a way to analyze the structure, isolated layer and g roundsill as a whole system, using developing function of ansys. The finite elem ent calculation is also done, analysis and comparison on whole seismic response of a 7-layers structure with laminated rubber bearings and with the considerati o n of soil-structure interaction. The results show that finite element analysis o f whole seismic response of the foundation-base isolated structure is feasible and necessary.
In recent decades, base isolation technology has attracted more and more attention in research. It has been adopted by national code for seismic des ign of buildings, and has been wildly applied to a broad range of applications w orldwide. However, in traditional theoretical analysis, the influence of the soi l-structure interaction on base isolation is often ignored. Even if the effect o f groundsill is considered, the groundsill is mostly simplified by springs and d ampers. This paper proposes a way to analyze the structure, isolated layer and g roundsill as a whole system, using developing function of ansys. The finite elem ent calculation is also done, analysis and comparison on whole seismic response of a 7-layers structure with laminated rubber bearings and with the considerati o n of soil-structure interaction. The results show that finite element analysis o f whole seismic response of the foundation-base isolated structure is feasible and necessary.
引文
1 FA-GUNGFANand GOODARZ AHMADI:Floor Response Spectra for Base-Isolated Multi-Story Structure[J],Earthquake Eng.And Structural Dynamics,1990,19:377~388
2 黄永林.基础隔震研究与应用的回顾与前瞻[J].地震学刊,1998(4):58~65
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4 廖振鹏.工程波动理论导论(第二版)[M].北京:科学出版社,2002
5 Cheng NY,Cheng CH.Relationship Between Liao And Clayton-Engquist Absorbing Boundary-Conditions-Acoustic Case[J].B SEIS-MOLSOC AM,1995,85(3):954~956
6 Zhao CB,Valliappan S.Vibration of3-Dimendional Rigid Raft Foundation On Viscoelastic Medium[J].Earthquake Eng Struc.,1991,20(12):1159~1177
7 Zeng YQ,He JQ,Liu QH.The Application of the Perfectly Matched Layerin Numerical Modeling of Wave Propagationin Poroelastic Media[J].GEOPHYSICS,2001,66(4):1258~1266
8 Nakano H,Unno T,Nakayama K.FDTD Analysis and Measurement of Aperture Antennas Bbased onthe TriplateTtransmission-Line Structure[J].IEEE TANTENNPROPAG,1999,47(6):986~992
9 Georgieva N,Chen ZZ,Bhartia P.Analysis of Transient Electromagnetic Fields Based on The Vector Potential Function[J].IEEET MAGN,1999,35(3):1410~1413
10 Liu QH,Schoen E,Daube F.Three-Dimensional Finite Difference Simulation of Sonic Logging[J].JACOUSTSOC AM,1996,100(1):72~79
11 谢宁.橡胶隔震支座力学性能测试报告[R].云南工业大学建筑工程学院,1998
12 吴彬,庄军生,藏晓秋.铅芯橡胶支座等效线性分析模型参数的研究[J].中国安全科学学报,2003,13(8):65~68
2 黄永林.基础隔震研究与应用的回顾与前瞻[J].地震学刊,1998(4):58~65
3 孔戈,丁海平,金星等.多次透射边界在ANSYS软件中的应用[J].工程抗震及加固改造,2005,27(2):67~70
4 廖振鹏.工程波动理论导论(第二版)[M].北京:科学出版社,2002
5 Cheng NY,Cheng CH.Relationship Between Liao And Clayton-Engquist Absorbing Boundary-Conditions-Acoustic Case[J].B SEIS-MOLSOC AM,1995,85(3):954~956
6 Zhao CB,Valliappan S.Vibration of3-Dimendional Rigid Raft Foundation On Viscoelastic Medium[J].Earthquake Eng Struc.,1991,20(12):1159~1177
7 Zeng YQ,He JQ,Liu QH.The Application of the Perfectly Matched Layerin Numerical Modeling of Wave Propagationin Poroelastic Media[J].GEOPHYSICS,2001,66(4):1258~1266
8 Nakano H,Unno T,Nakayama K.FDTD Analysis and Measurement of Aperture Antennas Bbased onthe TriplateTtransmission-Line Structure[J].IEEE TANTENNPROPAG,1999,47(6):986~992
9 Georgieva N,Chen ZZ,Bhartia P.Analysis of Transient Electromagnetic Fields Based on The Vector Potential Function[J].IEEET MAGN,1999,35(3):1410~1413
10 Liu QH,Schoen E,Daube F.Three-Dimensional Finite Difference Simulation of Sonic Logging[J].JACOUSTSOC AM,1996,100(1):72~79
11 谢宁.橡胶隔震支座力学性能测试报告[R].云南工业大学建筑工程学院,1998
12 吴彬,庄军生,藏晓秋.铅芯橡胶支座等效线性分析模型参数的研究[J].中国安全科学学报,2003,13(8):65~68
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