地震工程学报2024，Vol.46Issue(1)：16-25,10.DOI:10.20000/j.1000-0844.20211231001
基于爆破荷载等效施加方法的振动波形预测与古建筑安全评估
Prediction of vibration waveform and a safety assessment of ancient buildings based on the equivalent simulation method of blasting load
摘要
Abstract
Vibration produced by blast excavation of tunnels has a great influence on the safety of adjacent ancient buildings.To study the propagation law of blasting vibration waves,predict the ground vibration effect,and analyze the safety of adjacent ancient buildings,the dynamic response of Labuleng Temple under a blasting load was predicted using field measurements com-bined with numerical simulation analysis.The results show that(1)particle vibration velocity increases with explosive quantity,and attenuation ratio increases with vibration velocity,indica-ting fast and slow attenuation of high-and low-frequency vibrations,respectively.(2)Blasting load is applied to the elastic boundary or contour plane of tunnel excavation,and dynamic simula-tion results show that their vibration velocity is consistent at intermediate or far distances larger than 40 m;therefore,applying the load on the contour plane of the tunnel excavation is reasona-ble.(3)Volume waveform at the free interface of blasting seismic wave is reflected to form Ray-leigh waves propagating along the surface.Combined with the numerical simulation of the propa-gation law of seismic waves in the mountain,a complex vibration zone is formed in the mountain by reflection and superposition.(4)When the local seismic wave reaches the Labuleng Temple,radial,vertical,and synthetic vibration velocities have peak values of 0.000 672,0.000 448,and 0.000 807 cm/s,respectively,which are far less than the safety vibration control standard of ancient buildings.关键词
爆破振动/等效荷载/数值模拟/爆破地震波/安全评价Key words
blasting vibration/equivalent load/numerical simulation/blasting seismic wave/safety evaluation分类
建筑与水利引用本文复制引用
乔雄,刘文高,倪伟淋,张伟,杨鑫,黄锦聪,刘锦龙..基于爆破荷载等效施加方法的振动波形预测与古建筑安全评估[J].地震工程学报,2024,46(1):16-25,10.基金项目
国家自然科学基金资助项目(51769013) （51769013）
甘肃省基础研究创新群体(20JR5RA478) （20JR5RA478）
