框架结构中现浇楼梯的抗震性能分析

本文研究了框架结构的楼梯在汶川地震中出现的多种震害状况,如梯段板的断裂,框架角柱的短柱破坏,楼梯间梯柱、平台梁和平台板等构件的破坏。结合《建筑抗震设计规范(GB 50011-2001)》部分规定和工程中楼梯的设计方法,分析了震害出现的原因,指出了GB 50011-2001规范中有关楼梯设计方法和构造措施的不足,给出了今后框架结构中楼梯设计和施工的相关建议。

Analysis of Cast-in-place Stairs in the Seismic Performance of Frame Structures

The article studies damage of the Cast-in-place stairs of frame structures in Wenchuan earthquake, such as ladder board fracture, short column failure of corner column, damage of constructional column, platform beam and plate failure and etc. Based on the 2001 edition of the code for seismic design of building regulations and the design method of stair in engineering, we analyze the cause of the earthquake damage, show weaknesses of the stairs design method and construction measure in the old code, and put forward some suggestions about stair design and construction in the future.