再生混凝土矮墙在反复荷载作用下的强度与变形性能
发布时间：2019-02-21 20:46
【摘要】：为了深入了解再生混凝土矮墙在地震作用下的承载能力、变形性能、传力机制与破坏模式等，本文对具有不同轴压比、不同配筋参数的6片再生混凝土矮墙进行了低周反复荷载作用下的试验研究，得出了6片再生混凝土矮墙试件的破坏形态、荷载-侧移角滞回曲线、特征荷载与特征位移、骨架曲线与刚度退化曲线、各加载阶段的竖向钢筋应变与水平钢筋应变，阐述了轴压比、竖向分布筋配筋率、水平分布筋配筋率、暗柱、插筋等参数对再生混凝土矮墙性能的影响，并讨论了我国设计规范中矮墙“强剪弱弯”的设计方法等。最终基于试验结果提出了弯曲-斜压复合传力机制与计算模型，很好地解释了矮墙的承载与传力特性，可准确计算发生弯曲-斜压复合型破坏的矮墙试件的极限承载力。此外，对再生混凝土矮墙试件的变形性能进行了分析，，得出了矮墙试件中弯曲变形、剪切变形对试件总变形的贡献及在整个加载过程中的变化规律。
[Abstract]:In order to deeply understand the bearing capacity, deformation performance, force transfer mechanism and failure mode of recycled concrete short wall under earthquake, this paper has different axial compression ratio. Six recycled concrete dwarf walls with different reinforcement parameters were tested under low cyclic loading. The failure patterns, load-lateral angle hysteretic curves, characteristic loads and characteristic displacements of six recycled concrete short wall specimens were obtained. Skeleton curve and stiffness degradation curve, vertical steel bar strain and horizontal steel bar strain at each loading stage, elaborated axial compression ratio, vertical distribution reinforcement ratio, horizontal distribution reinforcement ratio, dark column, The influence of the parameters such as reinforcements on the performance of recycled concrete dwarf wall is discussed. The design method of "strong shear and weak bending" of the short wall in the design code of our country is discussed. Finally, based on the experimental results, the bending-baroclinic composite force transfer mechanism and calculation model are proposed, which can explain the bearing and force transfer characteristics of the short wall, and can accurately calculate the ultimate bearing capacity of the short wall specimen with bending-baroclinic composite failure. In addition, the deformation behavior of the recycled concrete low wall specimen is analyzed, and the contribution of bending deformation and shear deformation to the total deformation of the test piece and the changing rule in the whole loading process are obtained.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TU37;TU312
本文编号：2427878
[Abstract]:In order to deeply understand the bearing capacity, deformation performance, force transfer mechanism and failure mode of recycled concrete short wall under earthquake, this paper has different axial compression ratio. Six recycled concrete dwarf walls with different reinforcement parameters were tested under low cyclic loading. The failure patterns, load-lateral angle hysteretic curves, characteristic loads and characteristic displacements of six recycled concrete short wall specimens were obtained. Skeleton curve and stiffness degradation curve, vertical steel bar strain and horizontal steel bar strain at each loading stage, elaborated axial compression ratio, vertical distribution reinforcement ratio, horizontal distribution reinforcement ratio, dark column, The influence of the parameters such as reinforcements on the performance of recycled concrete dwarf wall is discussed. The design method of "strong shear and weak bending" of the short wall in the design code of our country is discussed. Finally, based on the experimental results, the bending-baroclinic composite force transfer mechanism and calculation model are proposed, which can explain the bearing and force transfer characteristics of the short wall, and can accurately calculate the ultimate bearing capacity of the short wall specimen with bending-baroclinic composite failure. In addition, the deformation behavior of the recycled concrete low wall specimen is analyzed, and the contribution of bending deformation and shear deformation to the total deformation of the test piece and the changing rule in the whole loading process are obtained.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TU37;TU312
【参考文献】
相关期刊论文 前2条
1 彭有开;吴徽;高全臣;;再生混凝土长柱的抗震性能试验研究[J];东南大学学报(自然科学版);2013年03期
2 曹万林;张勇波;董宏英;周中一;;再生混凝土结构抗震性能研究进展与评述[J];地震工程与工程振动;2013年06期
本文编号：2427878
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