摘要
为了得到复杂工况下地下厂房的真实动力响应,考虑地下厂房结构、边界条件和受力特性的复杂性,采用三维动力有限元法开展地下厂房的动力特性分析。计算成果表明:动位移最大值发生在地下厂房的两侧,但各方向的动位移相对都比较小,说明良好的约束可以有效的减小振动位移;正常工况的动力系数比较小,基本上呈静态响应,其他工况的动力系数相对较大,不会发生共振;不同荷载组合下的结构振幅能满足规范设计要求。其成果为有效优化地下厂房整体动力特性、改进抗振设计提供了技术手段。
In order to get the dynamic response of the underground powerhouse under complex loading conditions,considering the combination effect of powerhouse structure,constraint boundaries and mechanical properties,the 3-Dimensional dynamic FEM is proposed to analyze corresponding dynamic characteristics.The calculation results indicate that the maximum dynamic displacement is in both sides of the underground powerhouse,but the dynamic displacement in every direction is relatively very small,which illuminates that good constraints can effectively decrease the vibration displacement,and the dynamic coefficients in the normal operation condition is relatively smaller than other loading conditions,and the resonance cannot occur for all the operation conditions.Furthermore,structural amplitude for the different load combination also satisfy with the code requirement.Thus,the above simulations provide a rational support for optimization of the dynamic characteristics and improvement of the vibration resistance for the underground powerhouse.
作者
张立君
钱磊
ZHANG Li-jun;QIAN Lei(Zhanghe Administration Bureau,Jingmen 448156,China;School of Civil Engineering,Chongqing University,Chongqing 400044,China)
出处
《价值工程》
2023年第3期81-84,共4页
Value Engineering
关键词
地下厂房
三维动力有限元法
动力特性
动位移
underground powerhouse
3-dimensional dynamic FEM
dynamic characteristics
dynamic displacement
