陈高源

摘 要：在位于高烈度地区的某框剪结构新建医院中设置黏滞阻尼器进行减震设计，并对该结构进行罕遇地震作用下的弹塑性变形验算，以保证发生本区域设防地震时不会丧失使用功能。采用建筑结构有限元分析软件ETABS分别对抗震结构和消能减震结构，将根据规范选取的三条地震波沿主轴方向双向输入，进行8度大震作用下的动力非线性时程分析。通过对比最不利工况下两种结构的计算结果，表明黏滞阻尼器能显著减小该建筑的基底剪力、层间位移角和主要受力构件的开裂破坏。阻尼器耗能在总非线性耗能中占比30%，且在罕遇地震下提供给结构的附加有效阻尼比达到2.6%。消能装置有效保护主体结构的安全，提高其抗震性能，保证该医疗建筑震后能正常使用。

关键词：动力时程分析;非线性耗能;附加阻尼比

中图分类号：TU352     文献标识码：A     文章编号：1003-5168（2021）36-0056-03

Application of Viscous Damper in a Frame Shear Structure in Octave Region

CHEN Gaoyuan

（School of Civil Engineering and Communication，North China University of Water Resources and Electric Power， Zhengzhou Henan 450045）

Abstract： Viscous dampers were set up in a new frame-shear wall hospital located in high intensity area to carry out shock absorption design， and the elastic-plastic deformation of the structure under the action of rare earthquake was checked to ensure that the function of this area would not be lost in the event of earthquake. Using the finite element analysis software ETABS for building structures， the three seismic waves selected according to the code are input along the principal axis in two directions， and the dynamic nonlinear time history analysis under the action of 8 degree earthquake is carried out. By comparing the calculation results of the two structures under the most unfavorable conditions， it is shown that the viscous damper can significantly reduce the base shear， inter-story displacement angle and the cracking failure of the main stressed members of the building. The energy dissipation of the damper accounts for 30% of the total nonlinear energy dissipation， and the additional effective damping ratio provided to the structure under rare earthquakes is up to 2.6%. The energy dissipation device can effectively protect the safety of the main structure， improve its seismic performance， and ensure the normal use of the medical building after earthquake.

Keywords： dynamic time history analysis; nonlinear energy dissipation ; additional damping ratio

住建部和國家质量监督检验检疫总局颁布的《建筑工程抗震设防分类标准》（GB 50223—2008）将城镇医院、防灾应急指挥中心、疾病预防与控制中心等防灾救灾建筑的抗震设防类别提高为重点设防类[1]。目前，消能减震设计在新建建筑和既有建筑加固改造中的应用呈上升趋势，住房和城乡建设部颁布行业标准《建筑消能减震技术规程》（JGJ 297—2013）[2]，中国工程建设标准化协会颁布行业标准《消能减震加固技术规程》（T/CECS 547—2018）[3]。目前，国内也有一些消能减震技术的实际应用。李英民等[4]以某框架结构的医院为例，介绍了基于性能的抗震设计方法和黏滞阻尼器在抗震设防类别提高已建结构抗震加固中的应用。……