摘要
混凝土地下结构广泛应用于工程实际,但其在地表强冲击荷载下的振动安全评价方法有待完善。本文归纳总结已有国内外振动安全评价方法,基于已有的数值方法,进行关键影响因素的参数分析,包括冲击块体积、高度、数量、位置以及地下结构形式和埋深,建议了不同场地类别条件下矩形混凝土地下结构简单实用振动安全评价方法。研究结果表明:不同规范对地下结构振动安全的评价指标存在较大差异,且大多基于爆破工程或大量的实测数据统计,缺乏理论依据;场地土类别对地下结构振动安全具有显著的影响,因此必须依据场地土类别建议对应的地下结构振动安全阈值;地下结构振动速度与对应地表点的振动速度具有较好的线性关系,因此不便于获取地下结构振动速度时,可采用对应地表点的振动速度进行安全评价。
Concrete underground structure is widely used in engineering practice,but its vibration safety evaluation method under surface strong impact load needs to be improved.The existing vibration safety evaluation methods at home and abroad are summa‐rized in the paper.The parameter analysis of key influencing factors,including the volume,height,number,location of the impact block,and the form and depth of the underground structure,is carried out based on the existing numerical methods.A simple and practical vibration safety evaluation method for rectangular concrete underground structures under different site types is proposed.The results show that the evaluation indexes of vibration safety of underground structures in different codes are quite different,and most of them lack theoretical basis because they are based on blasting engineering or some statistical data.The site soil type has a significant impact on the vibration safety of underground structures.Therefore,the corresponding vibration safety threshold of the underground structure must be recommended according to the site soil type.The vibration velocity of underground structure has a good linear relationship with the vibration velocity of corresponding surface points.Therefore,when it is not easy to obtain the vi‐bration velocity of underground structure,the vibration velocity of corresponding surface points can be used for safety evaluation.
作者
王国波
殷耀
岑欣欣
谢伟平
季杉
郄嘉琳
WANG Guo‑bo;YIN Yao;CEN Xin‑xin;XIE Wei‑ping;JI Shan;QIE Jia‑lin(College of Civil Engineering and Architecture,Wenzhou University,Wenzhou 325035,China;School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;China Construction Third Engineering Bureau Group South China Co.Ltd.,Guangzhou 510600,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2022年第5期1048-1057,共10页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(52078386,51878529,51678465)
武汉市城乡建设局科研项目(201945)。
关键词
地下结构
冲击荷载
振动速度
安全评价
underground structure
impact load
vibration velocity
safety evaluation
