| 高耸工程结构基础约束刚度识别方法 |
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| 引用本文： | 王俊,汪凤泉,张宇峰.高耸工程结构基础约束刚度识别方法[J].东南大学学报(自然科学版),2007,37(2):306-309. |
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| 作者姓名： | 王俊 汪凤泉 张宇峰 |
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| 作者单位： | 1. 江苏省交通科学研究院,南京,210017
2. 东南大学土木工程学院,南京,210096 |
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| 基金项目： | 江苏省交通科学研究计划 |
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| 摘 要： | 在Rayleigh能量法和Southwell频率合成法的基础上导出了高耸工程结构复合振动基频计算公式,将基频表示成各惯性元和变形元所组成子系统的频率合成.在此基础上建立了结构基础约束刚度的识别方法,该方法利用结构固有基频和地基约束刚度的关系,只需测出结构顶端加载前后2种状态下的振动频率就可以估算出基础约束刚度.同时用标准实验证明了该方法的正确性.高耸工程结构复合振动基频计算公式计算简单,精度高,特别适用于识别桥墩和各种高耸建筑的基础约束刚度.
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| 关 键 词： | 高耸工程结构 基础约束刚度 频率 |
| 文章编号： | 1001-0505（2007）02-0306-04 |
| 修稿时间： | 2006-11-16 |
Identification of restraints stiffness of tower structure foundation |
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| Wang Jun,Wang Fengquan,Zhang Yufeng.Identification of restraints stiffness of tower structure foundation[J].Journal of Southeast University(Natural Science Edition),2007,37(2):306-309. |
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| Authors: | Wang Jun Wang Fengquan Zhang Yufeng |
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| Institution: | 1.Jiangsu Transportation Research Institute, Nanjing 210017, China; 2.School of Civil Engineering, Southeast University, Nanjing 210096, China |
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| Abstract: | An approach is developed based on the combination of Rayleigh and Southwell's methods.The fundamental frequency of tower structure derived from energy method is indicated as a composition of frequencies of each subsystem,which consists of a deformable component and an inertia component.Based on the relationship between fundamental frequency of structure and foundation restraints stiffness,the restraints stiffness of structure foundation can be conveniently identified from measuring changed fundamental frequency accompanying with changed mass on the top of structure.A standard experiment was carried out to demonstrate the accuracy of the presented approach.The calculation formula presented in this paper is simple in computation,high in precision, and adaptable to identify the foundation restraints stiffness of bridge piers and all kinds of towers. |
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| Keywords: | tower structure restraints stiffness of foundation frequency |
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