| 木柱与钢筋混凝土梁柔性装配节点的非线性力学性能分析 |
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| 引用本文： | 吴忠铁,张轲.木柱与钢筋混凝土梁柔性装配节点的非线性力学性能分析[J].西北地震学报,2022,44(6):1251-1259,1286. |
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| 作者姓名： | 吴忠铁 张轲 |
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| 作者单位： | 西北民族大学 土木工程学院,甘肃 兰州 730030 |
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| 基金项目： | :国家自然科学基金(51868067)；中央高校基本科研业务费专项资金资助项目(31920210015)；甘肃省自然科学基金项目(20JR5RA508)；2021年甘肃省高校创新创业教育教学改革研究项目(GS2021)；甘肃省建设厅科技攻关项目(JK2019-10)；甘肃省高等学校创新基金项目(2020B-067,2022-248) |
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| 摘 要： | 为研究装配式木柱与钢筋混凝土混合结构梁柱柔性节点的非线性力学性能,设计一种木柱与钢筋混凝土混合结构装配节点.利用 ABAQUS软件建立有限元模型,并对节点模型进行单调加载荷载分析和低周反复加载分析,主要研究橡胶硬度和竖向荷载对装配节点的破坏特征、滞回曲线、骨架曲线、承载力及耗能能力等非线性力学性能的影响,并与相关文献对比,验证分析方法的可行性.结果表明:该柔性节点的主要破坏模式有柱脚受压屈曲、受拉抬起现象和橡胶压缩变形破坏.柔性装配节点的承载力、刚度、延性与其阻尼材料的硬度二者呈正比关系.随着阻尼材料硬度提高,可以有效限制柱体侧倾和柱脚抬起现象.当采用71HA 硬度的橡胶材料时其耗能能力较好.同时,竖向荷载对装配节点的阻尼比影响较大,增加竖向荷载可以有效提高该节点的黏滞阻尼比.
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| 关 键 词： | 柔性装配节点 橡胶硬度 非线性力学性能 破坏模式 |
Nonlinear mechanical properties of flexible assembled joints for timber column and reinforcement concrete beam |
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| WU Zhongtie,ZHANG Ke.Nonlinear mechanical properties of flexible assembled joints for timber column and reinforcement concrete beam[J].Northwestern Seismological Journal,2022,44(6):1251-1259,1286. |
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| Authors: | WU Zhongtie ZHANG Ke |
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| Institution: | School of Civil Engineering,Northwest Minzu University,Lanzhou 730030 ,Gansu,China |
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| Abstract: | A type of assembled joints for timber column-reinforced concrete hybrid structures was designed to study the nonlinear mechanical properties of beam-to-column flexible joints for assembled timber column-reinforced concrete hybrid structures. A finite element model was established by using the ABAQUS finite element software, and the analyses under monotone loading and low-cycle repeated loading were conducted for the model. Effects of rubber hardness and vertical load on the nonlinear mechanical properties of assembled joints, including the damage characteristics, hysteresis curve, skeleton curve, bearing capacity, and energy dissipation capacity,were mainly studied. Compared with related literature, the feasibility of the proposed method was verified. Results show that the main failure modes of the flexible joint are compression buckling and tension lifting of the column base and compression deformation of rubber. The bearing capacity, stiffness, and ductility of the flexible assembled joint are proportional to the hardness of filled damping materials. The lateral tilting of columns and the lifting of column bases are effectively limited by the increase in the hardness damping materials. When rubber materials with 71 HA hardness are used, their energy dissipation capacity is good. Meanwhile, the vertical load has a considerable influence on the damping ratio of the assembled joint, which effectively improves the viscous damping ratio of the assembled joint by increasing the vertical load. |
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