摘要
文中对现行建筑抗震设计规范中有关场地分类和设计反应谱特征周期Tg的规定在执行过程中提出的问题进行了讨论,并在此基础上给出了一个改进的方案,其中包括四类场地的等价剪切波速和覆盖层厚度界限以及相应Tg值的连续化取值。此外,文中还讨论了设计反应谱特征周期连续变化的必要性和可行性,给出了特征周期按照场地分界线上的相应值进行插值的原则。
Seismic site classification and rating of the correspording characteristic periods of design spectra that have been offered in the course of implementation of the current seismic design code for buildings are reviwed in this paper.An improved scheme of seismic site classification is proposed which covers the ranges of the equivalent shear wave velocity and overburden thickness for 4 types of site and the continuous rating of corresponding characteristic periods. In addition, the necessity and feasibility of continueous changes of the characteristic periods in design spectra are discussed and the principles of interpolation of the characteristic period across boundary lines of the site classiffication are given in the paper.
出处
《工程抗震》
1999年第4期3-8,共6页
Earthquake Resistant Engineering
