论文部分内容阅读
为准确确定三维地震作用下应用摩擦摆支座(FPB)单层球面网壳结构的减震效果,在精细化建模基础上,分析了摩擦摆支座的隔震机理,并对摩擦摆支座单层球面网壳结构从静力和动力两个方面进行分析.静力荷载作用下,从结构内力、变形和稳定性3个方面分析摩擦摆支座对网壳结构静力力学性能的影响;三维地震作用下,应用动力时程分析方法分析了地震动强度以及摩擦摆支座参数对单层球面网壳抗震性能的影响规律.结果表明:静力作用下,加强外环杆件能有效改善摩擦摆支座对网壳结构的不利影响;三维地震作用下,地震动强度越大,摩擦摆支座隔震性能越好;摩擦摆支座的最优摩擦系数随着地震动强度的增大而增加;摩擦摆支座曲率半径越大网壳结构的抗震性能越好.
In order to accurately determine the damping effect of the single-layer spherical reticulated shell with friction stirrup (FPB) under the action of three-dimensional earthquake, the isolation mechanism of the friction pedestal is analyzed based on the refined modeling. The single-layer spherical reticular shell structure is analyzed from the static and dynamic aspects.The influence of the friction pendulum support on the static mechanical properties of the reticulated shell structure is analyzed from the aspects of internal force, deformation and stability of the structure under static load Under the action of three-dimensional earthquake, the influence of the seismic intensity and the parameters of the pendulum bearing on the seismic behavior of the single-layer reticulated dome was analyzed by the dynamic time-history analysis method. The results show that under the static force, Improve the negative impact of friction pedestal on the shell structure; under the action of three-dimensional earthquake, the greater the seismic intensity is, the better the isolation performance of friction pedestal; the optimal friction coefficient of friction pedestal increases with the increase of ground motion strength Large and increased; friction pendulum seat radius of curvature of the greater reticular shell structure, the better seismic performance.