建筑结构学报2017，Vol.38Issue(3)：39-45,7.DOI:10.14006/j.jzjgxb.2017.03.004
基于场地特征周期的最小地震剪力系数研究
Study on minimum seismic shear coefficient based on characteristic period of site
摘要
Abstract
The minimum seismic shear coefficient is one of the important control indexes in the seismic design of buildings.The irrationality of the independency of the minimum seismic shear coefficient limit on the characteristic period of the site in the Chinese seismic design code was analyzed,which is also the main reason why it is difficult for the base shear coefficients of long-period structures in the site with class Ⅰ or Ⅱ to satisfy the code limit.The factors affecting the base shear coefficient were analyzed.It is found that the base shear coefficient depends on the factors such as the distribution of the mass and the stiffness,the seismic intensity,the characteristic period of the site,the damping ratio and the shape of the design spectrum.A new minimum seismic shear coefficient limit based on the characteristic period of the site was proposed,which lowers the code limit when the site soil condition is good,so that the requirement on the seismic shear coefficient for the long-period structure in the seismic design can be met more easily and the design would be more economical.The new limit for the minimum seismic shear coefficient proposed in this study was verified by a case study.关键词
最小地震剪力系数/场地特征周期/设计反应谱/抗震设计Key words
minimum seismic shear coefficient/characteristic period of site/design response spectrum/seismic design分类
建筑与水利引用本文复制引用
蒋欢军,段延锋,王逸珂..基于场地特征周期的最小地震剪力系数研究[J].建筑结构学报,2017,38(3):39-45,7.基金项目
国家自然科学基金项目(51478354). （51478354）
