(1 防灾科技学院， 三河 065201； 2 广东省地震局， 广州 510070； 3 中国地震局地震监测与减灾技术重点实验室， 广州 510070；4 广东省地震预警与重大工程安全诊断重点实验室， 广州 510070)

［摘要］通过强震动监测台阵对深圳地王大厦进行长期的环境振动监测，并结合风和温度等气象数据，研究了2014年1月～10月期间风、温度、结构加速度响应和各阶模态频率的变化及其相关性，分析了风和温度对模态频率监测的影响；分别采用多元线性回归和支持向量机技术两种方法进行建模，模拟风和温度对模态频率的共同影响，并分析比较不同模型的预测效果；基于风和温度数据预测模态频率的成功率，提出了一种简便的结构健康诊断方法。结果表明，地王大厦各阶模态频率多数与风速和温度呈负相关关系。两种拟合模型均能较好地反映各阶频率的变化特征。

［关键词］超高层建筑； 结构健康监测； 风； 温度； 频率变化

中图分类号：TU311-3文献标识码：A文章编号：1002-848X(2016)16-0113-08

Study of wind and temperature influences on natural frequencies of Diwang Plaza

Guo Xirui1, 2,3,4, Wang Lixin2,3,4, Jiang Hui2,3,4, Zhu Jiajian2,3,4, Zhu Min1

(1 Institute of Disaster Prevention, Sanhe 065201, China; 2 Guangdong Earthquake Administration, Guangzhou 510070, China; 3 Key Laboratory of Earthquake Monitoring and Disaster Mitigation Technology, CEA, Guangzhou 510070, China;  4 Key Laboratory of Earthquake Early Warning and Safety Diagnosis of Major Projects, Guangdong Province, Guangzhou 510070, China)

Abstract:Long-term ambient vibration monitoring of  Diwang Plaza in Shenzhen has been conducted through a strong motion monitoring array. Combined with wind, temperature and other meteorological data, changes and correlations of wind, temperature, structural acceleration response and various order modal frequency during the period from January to October in 2014 were studied and the effects of wind and temperature on the modal frequency monitoring were studied; multiple linear regression and supporting vector machine method were used for modeling respectively to simulate the combined effects of wind and temperature on the modal frequencies and analyze and compare forecasting effects of different models;  based on wind and temperature data to predict the success rate of modal frequency, a simple structural health diagnosis method was proposed. The results show that most of the modal frequencies of the Diwang Plaza are negatively correlated with the wind speed and temperature. Two kinds of fitting models can well reflect the variation characteristics of the frequency of each order.

Keywords:super high-rise building; structural health monitoring; wind; temperature; frequency variation

*中央高校基本科研业务费(ZY20150313)，中国地震局地震监测与减灾技术重点实验室、广东省地震预警与重大工程安全诊断重点实验室建设项目(2011A060901006)，地震科技星火计划(XH16031)，广东省重大科技专项项目(2012A080102008)。

通讯作者：王立新，博士，副研究员，Email：wlxustc@hotmail.com。