爆破振动对高层框架-剪力墙结构的影响

为了明确爆破冲击波对高层建筑结构构件及其施工安全性的影响,以广东以色列理工学院二期校区爆破工程为例,基于建筑物地表及典型结构构件监测数据,采用回归分析对高层建筑典型结构构件振动规律进行研究。研究表明:随着距爆源水平距离的增加,垂向、径向和切向振动速度逐渐减小且衰减趋势相似;结构局部振速存在放大效应,在距地高程相同的情况下,随着结构构件与地基的自振频率比值的减小,其振速比逐渐增大;在结构构件与地基的自振频率比值相同的情况下,随距地高程的增加,结构构件与地基的振速比呈线性增长。

Influence of blasting vibration on a high-rise frame-shear wall structure

In order to investigate the influence of blasting shock waves on high-rise building components and its demolition safety, the blasting vibration characteristics of the foundation and the key components of the Phase Ⅱ of the campus of Guangdong Technion-Israel Institute of Technology were monitored and studied with linear regression analysis. The results show that the vertical, radial and tangential vibrations velocities decrease in a similar trend with the increase of the horizontal distance to the blasting source. And the vibration velocity of structural components has an amplification effect. In the same elevation, as the natural frequency ratio of structural components to the foundation decreases, the vibration velocity ratio increases. In the same natural frequency ratio, the vibration velocity ratio increases in a linear change with the increase of the elevation.