环境激励下古建筑飞云楼动力性能分析  

Dynamic performance of the ancient architecture of Feiyun pavilion under the condition of environmental excitation

作　　者：高延安[1] 杨庆山[1] 王娟[1] 秦敬伟[1,2] 

机构地区：[1]北京交通大学土木建筑工程学院结构风工程与城市风环境北京市重点实验室,北京100044 [2]中国电子工程设计院,北京100142

出　　处：《振动与冲击》2015年第22期144-148,182,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金重大研究计划重点支持项目"古建木构的状态评估;安全极限与性能保持"(51338001);北京交通大学人才基金项目(2014RC011)

摘　　要：针对我国古建筑的维修及保护,需了解、把握其结构动力特性。在不损伤古建结构性能条件下获得结构动力响应数据,利用自然环境激励对纯木古建筑飞云楼进行动力测试。用随机减量技术(RDT)改进随机子空间识别(SSI)法精度,并用改进的SSI分析飞云楼动力响应数据,获得结构自振频率、阻尼等模态参数,所得动力特性参数能为保护该古建筑提供借鉴依据。Chinese ancient architecture is a significant embranchment of Chinese civilization, whose exquisite construction technology and unique architectural aesthetic value has made profound influence on ancient buildings in surrounding countries.The protection of wooden architectures,the most Chinese style building,because of its long civilized history and extensive distribution is becoming more and more urgent accompanying the passing of time. Understanding and grasping the structural dynamic characteristics of the building has great significance to its maintenance and protection.In order to collect dynamic response data under the condition of no damage to structural performance of the tested ancient architecture,the dynamic tests on the pure wood structural building of Feiyun pavilion which is a representative sample of Chinese ancient wood structure were carried out employing environment excitation.Modal parameters such as natural frequencies,and modal damping ratios were solved by the Stochastic Subspace Identification （SSI）method combined with the Random Decrement Technique （RDT）.The results offer references to the protection of this ancient building.

关 键 词：飞云楼 环境激励 模态识别 动力性能 

分 类 号：TU366.2[建筑科学—结构工程]