轻钢加层结构弹塑性时程分析

Elasto-plastic Time-history Analysis of Light-weiht Steel Storey-adding Structure

轻钢加层结构已经在加固改造工程中日益不断地增加,由于这种结构是两种不同材料的结构形式(混凝土结构和钢结构)复合而成的,存在刚度和承载力的突变,产生鞭梢效应等不利影响[1-3]。论文利用abaqus软件对多层混凝土结构轻钢加层进行了仿真分析,得出多层混凝土结构轻钢加层在频遇地震作用下能满足"小震不坏"的抗震设防要求。在罕遇地震作用下,轻钢加层结构的轻钢层不会发生破坏,但是原混凝土结构的薄弱层会发生屈服破坏。

The technique of adding stories with light-weight steel structure on the top of existing building is increasing constantly. However, this technique is not widely used in Chian now, for some problems of these structure, which is abrupt change in stifflless and beating capacity that result from the structure is compose of concrete structure and steel structure. Using the abaqus software, the simulation analysis of seismic performance is made. The result show that adding stories with light-weight steel structure on the top of existing building is in elastic state under frequent earthquake, and the new storey -- the adding storey on top of existing building is safe while the original structure is likely to cause plastic failure.