一個非對稱結構模型的系統識別

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姓名

李育政(Yu-Jheng Lee) 查詢紙本館藏

畢業系所

土木工程學系

論文名稱

一個非對稱結構模型的系統識別
(SYSTEM IDENTIFICATION OF A CLASS OF ASYMMETRIC-PLAN BUILDINGS)

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摘要(中)

本文提出了一個非對稱結構模型的系統識別方法。該方法顯示，針對任一指定的樓層，當其上下樓板的位移反應及構件的位置已測得時，該層樓構件的勁度與阻尼係數可同時被識別出。文中並以一數值模型驗證了此方法的正確性。
在論文中，吾人推導出一組新的識別公式。並且，所使用的推導方法較其他研究者來得簡單。藉由本文可知，此推導方法應用於有扭轉耦合效應建築結構之系統識別時亦十分有效。

摘要(英)

In this thesis we present an identification method of a class of asymmetric-plan, multi-storey buildings. It is shown that the stiffness and damping coefficients of the resisting elements at a specific storey can be identified simultaneously when the locations of these elements are known and the displacement responses are recorded at the floors just above and below the storey. A numerical simulation model is provided to verify the accuracy of the present identification method.
The identification formulae we derived in this thesis are new. And the approach we used is simpler then those proposed by other researchers before. In this thesis it is demonstrated that our approach is also efficient in the system identification of torsionally coupled buildings.

關鍵字(中)

★ 扭轉耦合效應
★ 非對稱結構模型
★ 系統識別

關鍵字(英)

★ torsionally coupled building
★ asymmetric-plan building
★ system identification

論文目次

ABSTRACT Ⅰ
ACKNOWLEDGEMENTS Ⅱ
TABLE OF CONTENTS Ⅲ
CHAPTER
1 INTRODUCTION 1
1.1 Concept of a system 1
1.2 System identification 2
1.3 Structural-system identification 2
1.4 Torsionally coupled buildings 4
1.5 Scope of this study 4
2 SYSTEM CONSIDERED 5
2.1 Asymmetric plan, multi-storey buildings 5
2.2 Mathematical model of the structural system 8
3 STIFFNESS-DAMPING SIMULTANEOUS
IDENTIFICATION：THEORY 11
3.1 Equation of motion in the frequency domain 11
3.2 Lemma 14
3.3 Identification theory 16
4 VERIFICATION OF THE THEORY THROUGH
NUMERICAL SIMULATION MODEL 20
4.1 Identification of stiffness 22
4.2 Identification of damping 28
5 CONCLUSION 34
REFERENCES 35

參考文獻

1. Sandquist, G. M., Introduction to system science, Prentice-Hall, Inc., Englewood Cliffs, New Jersey, 1985, pp. 21-38
2. Hart, G. C., and Yao, J. T. P., “System identification in structural dynamics”, J. Engrg. Mech., ASCE, 103(6), 1977, pp. 1089-1104.
3. Kozin, F., and Natke, H. G., “System identification techniques”, Structural Safety, Vol. 3, 1986, pp. 269-316.
4. Natke, H. G., “Recent trends in system identification”, Structural dynamics, W. B. Kratzig et al., eds., A. A. Balkema, Rottedam, The Netherlands, 1991, pp. 283-289.
5. Ghanem, R., and Shinozuka M., “Structural-system identification: theory”, J. Engrg. Mech., ASCE, 1995, 121(2), pp. 255-264.
6. Safak, E., “Analysis of earthquake records from structures: an overview”, Strong motion Instrumentation for Civil Engineering Structures, M. Erdik et al., eds., Kluwer Academic Publishers, The Netherlands, 2001, pp. 91-107.
7. Udwadia, F. E., and Sharma, D. K., “Uniqueness of damping and stiffness distributions in the identification of soil and structural systems”, J. Appl. Mech., ASME, 45, 1978, pp. 181-187.
8. Beck, J. L., and Jennings, P. C.,”Structural identification using linear models and earthquake records”, Earthqu. Eng. Struct. Dyn., 8, 1980, pp. 145-160.
9. Takewaki, I., and Nakamura, M., “Stiffness-damping simultaneous identification using limited earthquake records”, Earthqu. Eng. Struct. Dyn., 29, 2000, pp. 1219-1238.
10. Hejal, R., and Chopra, A. K., “Earthquake responses of torsionally-coupled buildings”, Report No. UCB/EERC 87-20, Earthquake Engineering Research Center, University of California, Berkeley, CA, 1987.
11. Chopra, A. K., “Dynamics of Structures: Theory and Applications to Earthquake Engineering (2nd edn)”, Prentice-Hall, Inc., Upper Saddle River, NJ, 2001.
12. Research notes written by Hin-Chi Lei, 2003. (to be published)

指導教授

李顯智(Hin-Chi Lei)

審核日期

2003-7-13

推文