Historical Changes in Earthquake Fortification Standard for Buildings in Shanghai
Through development for more than 60 years,seismic fortification standard for buildings in Shanghai underwent a process of gradual improvement from scratch and from degree 6 to 7.This paper combs the seismic zoning map and seismic design standard referenced for the buildings constructed in Shanghai in each period.The fortification level for seismic design norm of each version is divided into three stages,i.e.,single level fortification stage,three-level fortification stage and three-level+performance fortification stage;meanwhile,the change in values of seismic motion parameter is compared and summarized,mainly including dynamic coefficientβ,maximum value αmax of horizontal seismic coefficient and characteristic period Tg,so as to better guide the reconstruction and transformation work for existing houses in Shanghai.
万方数据
维普
