广东科学中心典型区域的风振响应及风振控制

以广东科学中心典型区域为研究对象,利用AR法模拟了该结构的脉动风速时程,进行不同风压、不同风向角下的风振响应分析,给出了采用非线性粘滞阻尼器的六种风振控制方案,并对不同方案的减振效果进行了对比研究。结果表明:所提减振方案对结构的风振反应具有很好的减振效果,结构顶点位移和加速度响应的最大降幅达18%和84.9%;对此类不规则大跨结构,建议将阻尼器安装在结构两侧以取得最好的减振效果;安装粘滞阻尼器对结构加速度的控制效果优于对结构侧移的控制效果。

Safety analysis and control of blasting mining area adjacent to infrastructure

Systematic analysis of influence of blasting vibration on bridges,tunnels,slopes and the mechanical relationships between each other were drawn based on the example of safety argument between blasting mining area and protected objects.The safety argument methods and technological means of controlling dangerous and harmful factors were proposed by the application of principle of risk analysis.And standard control system was established based on controlling the blasting parameters of division of blasting area.