FPB安装位置对柱支承K8型单层球面网壳结构力学性能的影响

Influence of Installation Position of FPB on Mechanical Performance of Column Supporting K8 Single-layer Spherical Reticulated Domes

针对FPB 2种不同安装位置(FPB-柱顶和FPB-柱底),开展了柱支承K8型单层球面网壳结构力学性能方面的研究。静力方面,从内力、变形及稳定性3个方面进行分析,结果表明,当FPB安装在柱底时,FPB和铰支座网壳结构静力力学性能相近,且优于FPB-柱顶网壳结构。动力方面,探讨了FPB安装位置的不同对网壳结构抗震性能的影响,结果显示,水平地震作用下,FPB-柱顶结构的减震效果明显优于FPB-柱底结构,减震效果相差约15%;竖向地震作用下,从杆件内力及节点加速度2个方面分析,FPB-柱顶网壳结构减震效果明显优于FPB-柱底结构,而随着PGA增大,FPB-柱顶网壳结构竖向相对变形逐渐大于FPB-柱底结构。

Based on two different installation positions of friction pendulum bearing（ FPB） including top and bottom of columns,the mechanical performance of column supporting K8 single-layer spherical reticulated domes is studied in this paper. The structural static performance is analyzed through internal force,deformation and stability. The results show that the static performance is similar between FPB and hinge supports when FPB are installed at the bottom of columns. Compared with FPB installed on the top of columns,the structural static performance is better when FPB is installed at the bottom of columns. In addition,the seismic performance of reticulated domes is discussed for different installation positions of FPB. Compared with FPB installed at the bottom of columns,the vibration reduction effect is better when FPB is installed on the top of columns under the horizontal earthquake,and the difference is about 15%.From two aspects of internal force and acceleration,the structural seismic performance is superior when FPB is installed on the top of columns under the vertical earthquakes. However,with the increase of PGA,the structural vertical relative deformation fast increases when FPB is installed on the top of columns,and in the end,it will exceed the deformation of reticulated domes with FPB installed at the bottom of columns.