摩擦摆隔震支座在网壳结构中多尺度模型分析

为研究摩擦摆隔震支座在网壳中的隔震特性和局部受力特性,利用ABAQUS有限元软件建立摩擦摆支座的实体模型,并将其应用于网壳结构,建立网壳结构的多尺度模型,并对该多尺度模型进行动力分析。分析表明摩擦摆隔震支座的加入可以有效的延长结构低阶振型的自振周期,而对结构的高阶振型的自振周期影响很小。通过对网壳结构输入单向地震波,探讨不同地震动输入强度下摩擦摆支座水平刚度变化对网壳节点加速度峰值、节点位移峰值及杆件轴力的影响。研究表明随着地震强度增加,摩擦摆隔震支座的水平刚度变化对网壳隔震响应影响越显著。在强震作用下摩擦摆隔震支座发生局部破坏,但不影响整体模型的多尺度分析。

MULTI-SCALE MODEL ANALYSIS OF FPS IN LATTICE SHELL STRUCTURES

In order to research the isolated and partially force feature of FPS in lattice shell,ABAQUS was used to establish the solid model of FPS and applied it to lattice shell whose multi-scale model has been established. Dynamic analysis has been done for this multi-scale model. The analysis shows that natural period of the lower order modes of the structure has been extended effectively and it has little effect on higher order models by analysing the multi-scale mode. Through inputting unidirectional wave to lattice shell,the effect of peak acceleration and peak displacement of joins,axial force of bar induced by the change of horizontal stiffness of FPS has been studied in different earthquake strength. The research shows that with the earthquake strength growing stronger,changing of horizontal stiffness of FPS has greater effect on isolated response of lattice shell. Under strong earthquake motions,FPS has local failure,which has little influence on studying the whole multi-scalel model.