LRB-DSB三维隔震系统的隔震效果分析

郭阳照; 潘毅; 吴体; 李静文; 王子超

doi:10.3969/j.issn.0258-2724.2018.06.015

LRB-DSB三维隔震系统的隔震效果分析

doi: 10.3969/j.issn.0258-2724.2018.06.015

郭阳照^1,2,,
潘毅^1,3, ,,
吴体²,
李静文²,
王子超¹

详细信息

作者简介:
郭阳照（1983—），男，博士，研究方向为建筑结构隔震与减震设计，E-mail： 350493431@qq.com

通讯作者:
潘毅（1977—），男，副教授，博士，研究方向为工程结构抗震与减震、工程结构鉴定与加固，E-mail： panyi@swjtu.edu.cn

中图分类号: TU352.12
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- 文章访问数: 466
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- 被引次数: 0
出版历程
- 收稿日期: 2016-10-16
- 刊出日期: 2018-12-01

Analysis of LRB-DSB Three Dimensional Isolation System’s Isolating Effect

GUO Yangzhao^{1,2
,},
PAN Yi^{1,3
, ,},
WU Ti²,
LI Jingwen²,
WANG Zichao¹

摘要

摘要: 为研究叠层橡胶支座-碟形弹簧支座（LRB-DSB）串联组合式三维隔震系统的隔震效果，对LRB-DSB三维隔震系统之构成、原理和设计理论进行综合分析；结合算例，运用整体结构法对基于LRB-DSB的三维隔震结构、基于LRB的水平隔震结构和非隔震结构的动力特性及其在三维地震激励下的动力响应进行对比. 结果表明：LRB-DSB三维隔震系统的竖向刚度较LRB水平隔震系统适当降低，基于LRB-DSB的三维隔震结构的竖向自振周期可较基于LRB的水平隔震结构和非隔震结构延长1.2倍；基于LRB-DSB的三维隔震结构在水平向和竖向均能起到良好的隔震效果，弥补了基于LRB的隔震结构仅能起到水平隔震效能的不足.
- 三维隔震 /
- 叠层橡胶支座 /
- 碟形弹簧支座 /
- 地震响应
Abstract: In order to study the isolating effect of the three dimensional laminated rubber bearings-dish spring bearing （LRB-DSB） isolation system, comprehensive analyses for its construction, mechanism, and design theory were performed. On the basis of these analyses, comparative studies of the vibration characteristics and the dynamic response under three dimensional seismic excitation of the three dimensional base of the isolated structure based on LRB-DSB, horizontal isolation structure based on the LRB, and general seismic structure were conducted. The results showed that, in comparison with the LRB horizontal isolation system, the vertical stiffnesses of the three dimensional LRB-DSB isolation systems are properly descended, and the vertical vibration period can be extended by 120%. The LRB isolation system demonstrates good horizontal isolation capacity, but has no vertical isolation effect; it may even amplify any vertical seismic action on the structure. The three dimensional LRB-DSB isolation system can suitably make up for these deficiencies by isolating both the horizontal and vertical effects well.
- three dimensional isolation /
- laminated rubber bearing /
- dish spring bearing /
- seismic response

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图 1 LRB-DSB构造

Figure 1. Schematic construction of LRB-DSB

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图 2 碟形弹簧构造

Figure 2. Schematic construction of disc spring

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图 3 结构平面布置

Figure 3. Schematic diagram of structural plan

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图 4 隔震支座布置

Figure 4. Schematic diagram of isolation bearing

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图 5 结构有限元模型

Figure 5. Finite element model of structure

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图 6 地震波反应谱

Figure 6. Response spectrum of the ground motion

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图 7 隔震层竖向振动周期计算简图

Figure 7. Schematic diagram for calculating the vertical period of isolation layer

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图 8 结构楼层剪力对比

Figure 8. Comparison on structures’ storey shearing force

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图 9 结构顶层竖向加速度对比

Figure 9. Comparison on vertical acceleration of the structures’ top floor

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图 10 隔震层楼板竖向加速度对比

Figure 10. Comparison on vertical acceleration of the structures’ isolation-layer floor

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图 11 楼层竖向力对比

Figure 11. Comparison on vertical force of structural floor

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图 12 不同结构的底层柱轴压比

Figure 12. Comparison on axial compression ratio of structures’ underlying column

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表 1 LRB-DSB三维隔震装置的主要性能参数

Table 1. Main performance parameters of LRB-DSB three-dimensional isolation equipment

类型编号	水平隔震部件LRB					竖向隔震部件DSB
类型编号	K_V1	K_eq	K_u	Q_d	K_d	K_V2	C	α	h₀/δ	d_V，max
L-D-1	1525	0.79	—	—	—	72.6	500	0.2	0.3	45
L-D-2	1839	1.46	8.08	62.6	0.81	87.6	500	0.2	0.3	45

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表 2 选取的地震波

Table 2. Selected ground motions

地震波	地震事件	时间	地点	震中距/km
N194	WEBER地震	1990年	新西兰	12.6
PER19	LIMA地震	1974年	秘鲁	17.2
U2545	COYOTELAKE地震	1979年	美国	15.7

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表 3 结构基本周期

Table 3. Structures’ translational periods

方向	SRS	HIS	3DIS
X	1.290	3.085	3.081
Y	1.269	3.849	3.779
Z	0.161	0.167	0.378

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表 4 隔震层的最大位移

Table 4. Maximum displacement of isolation layer

地震波	HIS		3DIS
地震波	水平向	竖向	水平向	竖向
N194	98.6	3.7	91.8	35.3
PER19	133.5	3.8	135.1	34.8
U2545	92.3	3.4	93.2	35.1

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