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《建筑抗震设计规范》(GB 50011—2010)第3.6.6条规定在进行结构设计时,应考虑楼梯构件的影响。其实质就是通过“抗”来减小地震对构件的影响。根据悬挂式结构受力特点,提出一种新的楼梯受力体系,并利用有限元软件采用时程分析法进行计算,分析比较了普通楼梯和悬挂式楼梯对框架结构整体空间受力的影响。研究结果表明,悬挂式楼梯框架结构的周期与振型相比较普通楼梯框架结构有明显改善,能够明显降低楼梯梁、楼梯板及楼梯间附近框架柱的受力,保证结构构件在地震作用下的安全。
Article 3.6.6 of Code for Design of Seismic Design of Buildings (GB 50011-2010) stipulates that the influence of staircase components should be taken into account in the structural design. The essence is to reduce the impact of earthquakes on the components through the “anti”. According to the characteristics of the suspended structure, a new force system of stairs is proposed. The finite element software is used to calculate by time-history method. The influence of ordinary stairs and suspended stairs on the overall space force of the frame structure is analyzed and compared. The results show that the structure of the suspended staircase has a significant improvement in the periodicity and mode shape compared with that of the ordinary staircase, which can significantly reduce the stress on the frame columns near the stairway beam, staircase and stairwell, and ensure the structural components under earthquake action Safety.