（广州大学土木工程学院， 广州 510006）

［摘要］采用有限元软件对带消能楼梯间框架结构、带普通楼梯间框架结构、带滑动楼梯间框架结构及空框架结构进行地震作用下的数值仿真分析，研究了消能楼梯间对框架结构抗震性能的影响及消能楼梯间在整体结构中的减震效果。结果表明：消能楼梯间同时消除了梯板的支撑效应、填充墙的刚度效应及约束效应，而未明显改变结构的抗侧刚度分布，对结构动力特性的影响很小；消能楼梯间消耗了输入结构中的大量地震能量，提供了一定的有效附加阻尼比，减小了结构的楼层剪力、层间位移，提高了框架结构的抗震性能；消能楼梯间减轻了楼梯间构件、框架梁柱等在地震作用下的损坏程度，改善了结构的屈服情况，有助于结构实现“强柱弱梁”的屈服机制。

［关键词］消能楼梯间； 滑动楼梯间； 框架结构； 抗震性能； 抗侧刚度； 填充墙

中图分类号：TU375-4文献标识码：A文章编号：1002-848X(2019)21-0080-06

Seismic performance analysis of frame structures with damped staircases

Luo Dezhang， Deng Xuesong， Zhou Yun， Zhang Chao

(School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)

Abstract:Numerical simulation analysis was conducted on the frame structure with damped staircase, the frame structure with conventional staircase, the frame structure with sliding staircase and bare frame structure under earthquake actions, in order to research the effect of damped staircase on the seismic performance of frame structure and the energy dissipating performance of damped staircase. The results show that damped staircase decreases infill walls′ stiffness and eliminate the restraint effect and brace effect produced by stairs. The damped staircase does not significantly change the lateral stiffness distribution of the structure, and has little effect on the dynamic characteristics of the structure. The damped staircase consumes a large amount of seismic energy in the input structure, provides a certain effective additional damping ratio, reduces the floor shear force and interlayer displacement, and improves the seismic performance of the frame structure; damped staircase reduces the damage degree of staircase members, frame beams and columns under earthquake action, improves the yielding of the structure, and contributes to the yielding mechanism of “strong column and weak beam” of the structure.

Keywords:damped staircase; sliding staircase; frame structure; seismic performance; lateral stiffness; infill wall

*国家自然科学基金（51178128）。

通讯作者：邓雪松，硕士，教授，Email: deng2593@163.com。