近断层水平-竖向地震作用下基础隔震结构的动力响应

洪俊青; 包华

doi:10.13204/j.gyjz201104003

近断层水平-竖向地震作用下基础隔震结构的动力响应

doi: 10.13204/j.gyjz201104003

洪俊青,
包华

1.
南通大学建筑工程学院,江苏南通 226019

基金项目:

南通大学博士科研启动基金项目(09B09)

详细信息

作者简介:
洪俊青，男，1976年出生，博士。E-mail:hong2002912@163.com

中图分类号: TU352.12
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- 文章访问数: 156
- HTML全文浏览量: 7
- PDF下载量: 94
- 被引次数: 0
出版历程
- 收稿日期: 2010-11-17
- 刊出日期: 2011-04-20

DYNAMIC RESPONSES OF BASE-ISOLATED STRUCTURE UNDER THE NEAR-FAULT HORIZONTAL-VERTICAL SEISMIC ACTION

1.
College of Civil Engineering,Nantong University,Nantong 226019,China

摘要

摘要: 基础隔震技术在目前的结构分析和设计过程中，对于冲击性较强的近断层地震作用考虑甚少，特别是竖向分量考虑更少。通过选取1999年台湾集集地震中，含有完整水平与竖向地震分量的近断层记录、远场地震记录以及断层附近非脉冲型地震记录作为地震输入，分析基础隔震结构在近断层水平-竖向地震分量共同作用下的动力响应，以及隔震支座的受力状态。结果表明，脉冲型近断层地震波对中长周期隔震结构的影响较大，最大速度脉冲周期对基础隔震结构动力响应不是绝对控制性因素；近断层地震波竖向分量对基础隔震结构水平向的振动效应影响较小，对隔震支座受力的影响较大，可能导致隔震支座处于不安全的受拉状态，且明显大于非脉冲型地震波的影响。
- 近断层地震 /
- 地震作用 /
- 基础隔震结构 /
- 橡胶隔震支座
Abstract: During the application process of base-isolated technology，which is a generally acknowledged measure to resist the earthquake action and reduce the loss of building structure. But the near-fault seismic action with a strong shock is not taken into account usually，and the vertical component is less especially. Some earthquake acceleration records，which include the complete horizontal and vertical components from Chi-Chi Earthquake in Taiwan，are selected and divided into three types，near-fault，far-field and non-pulse seismic inputs. The dynamic responses of base-isolated structures and the states of base-isolated supports are analyzed under the horizontal and vertical motivations of those records simultaneously. The results show that the impulsive near--fault earthquakes impact on the medium and long-period base-isolated structures strongly. However the maximum velocity-pulse period of the seismic records do not control the dynamic responses of base-isolated structures absolutely. The seismic vertical component influences the horizontal responses of structures slightly. But base-isolated supports can be in the unsafe tension state under the pulse near-fault earthquake action，and stronger apparently than that under the non-pulse one.
- near-fault earthquake /
- earthquake action /
- base-isolated structure /
- rubber bearing

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