摩擦摆隔震单层柱面网壳地震响应试验研究

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摘要为研究摩擦摆支座应用于大跨网壳结构的隔震效果以及地震动空间效应对隔震网壳的影响，设计并完成了多点输入的摩擦摆基础隔震单层柱面网壳缩尺模型振动台试验。选用小幅值正弦波和不同频谱特性的3组实际地震波记录，包括不同烈度、不同维度以及不同视波速激励。对模型隔震前后的动力特性和结构位移、加速度及杆件应变等响应进行对比分析。试验还进行了小型摩擦摆支座力学性能的拟静力测试。研究表明：摩擦摆支座有效地延长了隔震体系的自振周期，网壳屋盖趋于整体平动，所受水平地震作用烈度相当于降低1~2度，隔震效果明显。在行波激励下，结构响应沿地震波传播方向逐渐相对增大，结构有轻微的转动。

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	李雄彦 1
	薛素铎 1
	单明岳 1
	黄福云 2

关键词 ：柱面网壳, 摩擦摆, 隔震, 多点激励, 振动台试验

Abstract：

In order to investigate the effect of the FPS bearing in largespan latticed shell and the influences of spatial variation of ground motions on the isolated structure, the shaking table test of a singlelayer cylindrical latticed shell shrunk model with FPS base isolation under multisupport excitations was designed and conducted. Small amplitude sinusoidal waves and 3 natural earthquake records with different frequency spectrum were chose, of various intensities, dimensions and visual wave velocities, to input into the model. The dynamic characteristic with/without FRS bearing, and the dynamic responses such as displacement, acceleration and strain were examined. Mechanical characteristics of the FPS bearing were derived by quasistatic test. The results show that FPS could prolong the natural vibration period of isolated latticed shell efficiently. The latticed shell roof tends to rigidbody motion and the horizontal earthquake actions of the upper structure reduce 1 to 2 degrees due to the installation of the FPS bearings. The effect of FPS base isolation is obvious. Under wavepassage excitation, the structural responses tend to be enlarged along the wave propagative direction and the roof rotates horizontal slightly.

Key words： Cylindrical latticed shell FPS seismic isolation multi-support excitations shaking table experiment

收稿日期: 2017-09-01 出版日期: 2018-03-15

引用本文:

李雄彦 1,薛素铎 1，单明岳 1，黄福云 2. 摩擦摆隔震单层柱面网壳地震响应试验研究[J]. 振动与冲击, 2018, 37(6): 68-75.
LI Xiongyan1,SHAN Mingyue1,XUE Suduo1,HUANG Fuyun2. Experimental study on seismic response of singlelayer cylindrical latticed shell with FPS. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(6): 68-75.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2018/V37/I6/68

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