小跨高比钢筋混凝土连梁抗震性能研究综述

Review of seismic performance of reinforced concrete coupling beams with small span-to-depth

钢筋混凝土连梁是联肢剪力墙结构的重要耗能构件,其抗震设计是基于性能的混凝土结构设计理论的重要组成部分。由于小跨高比钢筋混凝土连梁在地震中易发生脆性剪切破坏,如何提高其抗震性能一直是结构抗震领域的研究重点之一。相关研究已经取得了较为完善的成果,但仍存在进一步发展和完善的空间。为明确连梁抗震性能,并梳理和评价相关研究成果,总结了各国规范对连梁的相关规定、连梁的配筋方式、抗震性能试验以及受剪承载力计算模型方面的研究现状,并通过所搜集的92根小跨高比连梁试验数据对各国规范中连梁的受剪承载力公式进行了评价,对连梁受力和变形性能的主要影响因素进行了分析,以期为今后的连梁研究与设计提供参考和建议。

Reinforced concrete coupling beams are important energy dissipating components of coupled shear wall structures,and their seismic design is one of the very important subjects in the field of seismic analysis of structures.Due to the high possibility of a brittle shear failure of coupling beams with a small span-to-height ratio in earthquake,how to improve their seismic performance has been the focus to scholars all over the world.Although the research on this topic has achieved extensive results,there is still need for further research and improvement.To clarify the seismic shear performance of coupling beams,as well as review and evaluate the relevant existing research results,this paper summarized the relevant design code provisions,reinforcement methods,seismic performance tests and shear calculation models of coupling beams.Based on test results of 92 collected coupling beams with small span-to-depth ratios,shear strength equations provided by the design codes were evaluated,and main parameters influencing capacity and deformation of coupling beams are analyzed,so as to provide reference and suggestions for the future research and design of coupling beams.