传统框架及楼板局部设缝框架动力弹塑性时程分析

Elastic-plastic Dynamic Time-history Analysis of Traditional Frame and the Frame with Local Slot in Floor

本文提出楼板局部设缝框架结构,即在框架梁端塑性铰范围的侧向楼板内设置贯穿板厚的通缝,以消除现浇楼板及纵筋对梁端抗弯承载力的贡献,实现"强柱弱梁"的屈服机制。分析了小震和大震作用下,传统框架与楼板局部设缝框架的地震反应,研究大震作用下结构的塑性铰分布,表明楼板局部设缝框架结构能改善其屈服机制,实现"强柱弱梁"的抗震要求,提高结构抗震性能。

In this paper,the frame structure with local slot in floorslab is presented,that the straight slots penetrating slab thickness in floorslab is designed along plastic hinges range of frame beam ends to eliminate the contribution of in-situ-floorslab and its longitudinal reinforcement on the flexural capacity of beam ends,and to achieve the ' strong column-weak beam' yielding mechanism. The response of the traditional frame and the frame with local slot under frequent earthquake and rare earthquake is analyzed,and the distribution of plastic hinges subjected to rare earthquake is studied. The results indicate that the frame structure with local slot in floor may improve the yielding mechanism,realize ' strong column-weak beam' seismic requirements and raise the structure seismic property.