钢筋混凝土柱地震破坏模式及考虑剪切变形的抗震性能研究进展

发布时间：2018-04-16 06:07

本文选题：钢筋混凝土柱 + 破坏模式　；参考：《建筑结构学报》2017年08期

【摘要】：强震作用下钢筋混凝土(RC)柱如果设计不合理、抗剪措施不当或缺乏必要的抗震构造等会发生低延性的弯剪或剪切破坏,进而引发结构发生局部或整体倒塌,造成重大损失。为研究弯剪和剪切型RC构件的地震损伤机理和抗震性能,总结了RC柱的主要地震破坏模式、破坏模式判别方法以及剪切变形对柱抗震性能影响的研究进展。结果表明:RC柱的地震破坏模式主要有弯曲、剪切及弯剪型三种,其中弯剪破坏模式的界定和判别是研究的难点和重点;剪切变形对弯剪型RC柱抗震性能的影响主要体现在塑性变形阶段,但定量分析该影响的方法目前仍以经验模型为主,缺乏相对统一的力学模型。此外,已有的相关研究忽略了复杂的地震作用(即往复荷载作用历史)对柱破坏模式和损伤特性的影响,这需要在今后的研究中予以重点关注。
[Abstract]:If the design of RC columns under strong earthquake is unreasonable, improper shearing measures or the lack of necessary seismic structures, such as bending shear or shearing failure with low ductility will occur, and then the local or overall collapse of the structure will occur, resulting in great losses.In order to study the seismic damage mechanism and seismic behavior of flexural and shear RC members, the main seismic failure modes of RC columns, the methods of distinguishing failure modes and the effects of shear deformation on the seismic behavior of RC columns are summarized.The results show that there are three main seismic failure modes of RC columns: bending, shear and bending shear, and the definition and discrimination of flexural shear failure modes are the difficulties and emphases of the research.The effect of shear deformation on the seismic behavior of flexural shear RC columns is mainly reflected in the plastic deformation stage, but the method of quantitative analysis of the effect is still based on empirical model, lacking of a relatively unified mechanical model.In addition, the influence of complex seismic action (i.e. the history of reciprocating load) on the failure mode and damage characteristics of columns has been neglected, which needs to be paid more attention to in the future.
【作者单位】：河海大学土木与交通学院;大连理工大学建设工程学部;
【分类号】：TU352.11;TU375.3

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