（1 天水师范学院土木工程学院， 天水 741001； 2 聊城大学建筑工程学院， 聊城 252000）

［摘要］对西安钟楼环道行驶的地面车辆激励下钟楼木框架结构进行损伤识别，选取钟楼上部木框架结构1层外围的中跨梁进行分析，对钟楼木框架结构采用小波包能量曲率差来进行损伤定位研究。研究表明：该指标在没有噪声干扰情况下能敏感地识别出钟楼上部木框架结构的损伤，能准确定位出钟楼木框架结构梁上出现的损伤位置；损伤程度增加，指标值增大。在信噪比SNR大于或等于40dB情况下，有高斯白噪声的影响时该指标能准确定位钟楼上部木框架梁上出现的损伤位置，能抵抗一定的噪声干扰影响；进一步判别了钟楼木框架结构的损伤程度并进行了验算，为古木建筑结构在交通激励下的损伤识别奠定了理论基础。

［关键词］地面交通激励； 西安钟楼木结构； 损伤识别

中图分类号：TU366-2文献标识码：A文章编号：1002-848X(2017)17-0082-06

Damage detection of wood structure for Xi′an Bell Tower under ground transportation incentive

Wang Xin1, Meng Zhaobo2

(1 School of Civil Engineering, Tianshui Normal University, Tianshui 741001, China; 2 School of Architecture ＆ Civil Engineering, Liaocheng University, Liaocheng 252000, China)

Abstract:The damage detection of wood frame structure for Xi′an Bell Tower was studied under ground transportation incentive. The periphery cross beam on first-floor was selected to analyze, the wavelet packet energy curvature difference index for Xi′an Bell Tower wood structure was adopted to decide the damage location. The results show that the index is sensitive to the wood frame damage of Xi′an Bell Tower and it could be used to accurately decide the damage location under no noise interference. The index increases with the increasing of damage detection. When SNR is bigger or equal to 40dB, the index can decide damage location of wood frame structure and resist some noise under the effect of gaussian white noise. The damage degree of wood frame structure for Xi′an Bell Tower was further distinguished and checked, which can provide theoretical foundation for ancient wood structural damage detection under transportation incentive.

Keywords:ground transportation incentive; wood structure of Xi′an Bell Tower; damage detection

*国家自然科学基金项目(51378245)，国家基金主任基金项目(51248003)，陕西省科学技术研究发展计划项目(2013K13-02-08)，山东省研究生教育创新计划项目（SDYY13084,SDYY16102)。

作者简介：王鑫，博士，副教授，Email:wangxin01234@aliyun.com。