不规则结构在多维非平稳随机激励下的动力响应分析
Analysis for Dynamic Response of Irregular Structure under Multi-Dimensional Non-Stationary Random Excitations

DOI: 10.12677/HJCE.2013.25043, PP. 253-258

Keywords: 不规则结构；动力响应；非平稳；等效激励法
Irregular Structure, Dynamic Response, Non-Stationary, Equivalent Excitation

Full-Text   Cite this paper   Add to My Lib

Abstract:

本文着重研究不规则结构在多维地震动激励下的动力响应分析，基于等效激励法构造了多维地震动激励，考虑了随机激励功率谱在时域和频域上的非平稳性，同时模型中也考虑了场地等因素的影响。对一个典型的框架–筒体不规则结构进行了数值仿真，结果表明同时考虑激励的非平稳特性和多维激励对结构的动力响应至关重要。
Dynamic responses analysis of an irregular structure under multi-dimensional seismic excitations is studied, in which the seismic excitations are constructed by equivalent excitation method, while the non-stationary features of the input power spectral density both in time domain and frequency domain are considered, and the characteristics of local site are also incorporated in the model. The simulation of a typical frame-tube building is carried out; the results demonstrate that those factors mentioned are very essential to the dynamic responses of the structure.

References

[1]	钱江, 宣伟慧, 周颖等 (2012) 带高位转换层超限高层结构抗震性能数值模拟分析. 力学季刊, 3, 427-435.
[2]	易方民, 高小旺等 (2001) 高层建筑钢结构在多维地震动输入作用下的反应. 国家自然科学基金重大项目(59895410-3)专题年度报告.
[3]	Hongjin, K. and Hojjat, A. (2005) Hybrid control of irregular steel highrise building structures under seismic excitations. International Journal for Numerical Methods in Engineering, 63, 1757-1774．
[4]	李宏男 (2006) 结构多维抗震理论. 科学出版社, 北京.
[5]	林家浩, 张亚辉 (2004) 随机振动的虚拟激励法. 科学出版社, 北京, 60.
[6]	孙作玉, 王晖 (2010) 结构振动分析的等效激励法. 工程力学, S1, 20-22.
[7]	Sun, Z.Y., Wang, H., Fang, M.S., et al. (2013) Random vibration of a Cable-Stayed Bridge under Multi-Dimensional Seismic Excitations. Materials Processing and ManufacturingⅢ, 753-755, 1119-1123.
[8]	霍俊荣, 胡聿贤 (1992) 地震动峰值参数衰减规律的研究. 地震工程与工程震动, 1992, 2, 1-11.
[9]	薛素铎, 王雪生, 曹资 (2003) 基于新抗震规范的地震动随机模型参数研究. 土木工程学报, 5, 5-10.
[10]	霍俊荣 (1989) 近场强地面运动衰减规律的研究. 中国地震局工程力学研究所.
[11]	GB 50011-2001 (2001) 建筑抗震设计规范. 中国建筑工业出版社, 北京, 2.

Full-Text