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基础隔震与黏滞阻尼器减震性能对比研究
陈道政,黄冬冬
摘 要

(合肥工业大学土木与水利工程学院, 合肥 230009)

[摘要]采用基础隔震或在结构中布置黏滞阻尼器均可以有效减轻钢筋混凝土框架结构在地震中产生的震害。以一栋7层钢筋混凝土框架为研究对象,选取与场地条件相匹配的地震波作为激励,通过试算确定隔震构件和黏滞阻尼器的型号、布置,使这两种结构在多遇地震作用下位移减少量相同。采用SAP2000进行建模,计算了结构在罕遇地震下的非线性动力响应,并对比了结构的层间位移角、楼层加速度和塑性铰分布情况。分析结果表明:采用基础隔震的结构的抗震性能要好于设置黏滞阻尼器的结构。

[关键词]基础隔震; 黏滞阻尼器; 时程分析; 塑性铰

中图分类号:TU375-4文献标识码:A文章编号:1002-848X(2018)24-0058-05

 

Comparative study on shock absorption performance of base isolation and viscous damper

Chen Daozhen, Huang Dongdong

(College of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract:The earthquake damage of reinforced concrete frame structure can be effectively reduced by using the base isolation or the viscous dampers in the structure. A seven-story reinforced concrete frame structure was adopted as an example,a series of seismic waves which match the site conditions were selected as incentives. Through the trial calculation, the type and arrangement of the isolation member and the viscous damper were determined, so that the displacement reduction of the two structures is the same under the action of multiple earthquakes.  SAP2000 was used to establish structureal  model, the nonlinear dynamic response of the structure under rare earthquakes was calculated, and the interlayer displacement angle, floor acceleration and plastic hinge distribution of the structure were compared. The analysis results show that the seismic performance of the structure with base isolation is better than that of the viscous damper.

Keywords:base isolation; viscous damper; time\|history analysis; plastic hinge

 

作者简介:陈道政,博士,教授,一级注册结构工程师,Email:cdztai@163.com。

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