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（1 天水師范學(xué)院土木工程學(xué)院， 天水 741001； 2 聊城大學(xué)建筑工程學(xué)院， 聊城 252000）

［摘要］對(duì)西安鐘樓環(huán)道行駛的地面車(chē)輛激勵(lì)下鐘樓木框架結(jié)構(gòu)進(jìn)行損傷識(shí)別，選取鐘樓上部木框架結(jié)構(gòu)1層外圍的中跨梁進(jìn)行分析，對(duì)鐘樓木框架結(jié)構(gòu)采用小波包能量曲率差來(lái)進(jìn)行損傷定位研究。研究表明：該指標(biāo)在沒(méi)有噪聲干擾情況下能敏感地識(shí)別出鐘樓上部木框架結(jié)構(gòu)的損傷，能準(zhǔn)確定位出鐘樓木框架結(jié)構(gòu)梁上出現(xiàn)的損傷位置；損傷程度增加，指標(biāo)值增大。在信噪比SNR大于或等于40dB情況下，有高斯白噪聲的影響時(shí)該指標(biāo)能準(zhǔn)確定位鐘樓上部木框架梁上出現(xiàn)的損傷位置，能抵抗一定的噪聲干擾影響；進(jìn)一步判別了鐘樓木框架結(jié)構(gòu)的損傷程度并進(jìn)行了驗(yàn)算，為古木建筑結(jié)構(gòu)在交通激勵(lì)下的損傷識(shí)別奠定了理論基礎(chǔ)。

［關(guān)鍵詞］地面交通激勵(lì)； 西安鐘樓木結(jié)構(gòu)； 損傷識(shí)別

中圖分類(lèi)號(hào)：TU366-2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

*國(guó)家自然科學(xué)基金項(xiàng)目(51378245)，國(guó)家基金主任基金項(xiàng)目(51248003)，陜西省科學(xué)技術(shù)研究發(fā)展計(jì)劃項(xiàng)目(2013K13-02-08)，山東省研究生教育創(chuàng)新計(jì)劃項(xiàng)目（SDYY13084,SDYY16102)。

作者簡(jiǎn)介：王鑫，博士，副教授，Email:wangxin01234@aliyun.com。