- 摘 要
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（1江蘇科技大學(xué)土木工程與建筑學(xué)院， 鎮(zhèn)江 212000； 2 江蘇長江爆破公司， 鎮(zhèn)江 212000）
［摘要］以江蘇省昆山市朝陽西路南側(cè)兩棟樓房的爆破項目為工程背景，對爆破過程中產(chǎn)生的地震動及其效應(yīng)，包括地震波的傳播與衰減規(guī)律以及振動對鄰近區(qū)域內(nèi)一座三層砌體結(jié)構(gòu)房屋安全性能的影響，進(jìn)行現(xiàn)場測試，并采用有限元軟件SAP2000進(jìn)行數(shù)值模擬分析。測試結(jié)果表明，砌體結(jié)構(gòu)房屋的豎向振動速度大于水平向振動速度，三層走廊的各向振動速度大于一層，豎向主振頻率大都集中在10Hz以下，水平向主振頻率相對分散，但基本不超過50Hz。經(jīng)有限元數(shù)值模擬分析得到的低階自振頻率與頂層加速度值與實測的結(jié)果誤差較小。
［關(guān)鍵詞］爆破地震波； 砌體結(jié)構(gòu)； 自振頻率； 有限元分析
中圖分類號：TU365文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)06-0122-05
Field measurement and numerical simulation of dynamic response of masonry structure under blasting ground motion
Ni Hangen1, Pan Zhihong1, Sun Ke1, Zhang Yaoliang2, Zhou Bocheng2
(1 School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang 212000， China;2 Jiangsu Changjiang Blasting Company, Zhenjiang 212000, China)
Abstract:Taking the blasting project of two buildings on the south side of Chaoyang West Road in Kunshan City, Jiangsu Province as the engineering background, the ground motion and its effect in the blasting process were tested on site, including the propagation and attenuation of earthquake wave and the influence of vibration on the safety performance of a three-story masonry structure in the adjacent area, and the numerical simulation analysis was carried out by using the finite element software SAP2000. The test results show that the vertical vibration speed of masonry buildings is greater than the horizontal vibration speed, and the vibration speed of three-story corridor is greater than that of one story. The vertical main vibration frequency is mostly concentrated below 10Hz, and the horizontal main vibration frequency is relatively scattered, but it is basically no more than 50Hz. The errors between the low-order natural frequency and the top acceleration obtained by the finite element numerical simulation and the measured results are small.
Keywords:blasting earthquake wave; masonry structure; natural frequency; finite element analysis
*湖南省自然科學(xué)基金（11JJ5024），江蘇省研究生創(chuàng)新計劃（KYCX17_1847）。
作者簡介：倪漢根，碩士，Email：470301974@qq.com。
