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多腔钢管再生混凝土复合中长柱轴压性能研究
Study on Axial Compression Performance of Recycled Concrete Composite Midium and Long Columns with Multi-cavity Steel Tubes
2022年第10期
多腔钢管混凝土;中长柱;再生混凝土;轴压性能;长细比
Concrete -filled multi-cavity steel tube; Medium and long column; Recycled concrete; Axial compression performance
2022年第10期
10.19761/j.1000-4637.2022.10.040.06
四川省科技厅国际合作项目(2020YFH0127);广元城投集团科技基金(GYCT-KY-202101)。
袁 凯1,邓夕胜2,梁 涛1,曾 智2,朱一林2
1.广元市城市发展集团有限公司,四川 广元 628000;2.西南石油大学,四川 成都 610500

袁 凯1,邓夕胜2,梁 涛1,曾 智2,朱一林2

袁凯,邓夕胜,梁涛,等.多腔钢管再生混凝土复合中长柱轴压性能研究[J].混凝土与水泥制品,2022(10):40-44,59.

YUAN K,DENG X S,LIANG T,et al.Study on Axial Compression Performance of Recycled Concrete Composite Midium and Long Columns with Multi-cavity Steel Tubes[J].China Concrete and Cement Products,2022(10):40-44,59.

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摘   要:为研究多腔钢管再生混凝土复合中长柱在受压状态下的力学性能,采用ABAQUS软件对多腔钢管中长柱在轴向压力下的荷载-位移曲线、破坏模态、受力过程进行了模拟,并研究了再生混凝土取代率和复合柱长细比对其轴压性能的影响。结果表明:多腔钢管中长柱破坏模式为弯曲破坏,外部再生混凝土和核心再生混凝土跨中截面破坏明显,核心混凝土受钢管约束承载力提高明显;随着再生混凝土取代率和长细比的增加,多腔钢管中长柱的承载能力、延性和刚度均减小,当长细比过大时,易发生失稳破坏。 Abstract: In order to study the axial compression performance of recycled concrete composite medium and long columns with multi-cavity steel tube. The load-displacement curve, failure mode and stress process of the recycled concrete composite medium and long columns with multi-cavity steel tube under axial pressure were studied by ABAQUS. The effects of replacement ratio of recycled concrete and slenderness ratio of components on load-displacement curve, ductility and stiffness of the composite miduim and long columns under axial pressure were also studied. The results show that the failure mode of recycled concrete medium and long columns with multi-cavity steel tube is bending failure, the failure of external recycled concrete and core recycled concrete in mid-span section is obvious, and the bearing capacity of core concrete is improved obviously. The bearing capacity, ductility and stiffness of recycled concrete composite medium and long columns with multi-cavity steel tube is decreased with the increase of replacement rate of recycled concrete and the slenderness ratio. The instability failure of recycled concrete composite medium and long columns with multi-cavity steel tube will occur when the slenderness ratio is too large.
英文名 : Study on Axial Compression Performance of Recycled Concrete Composite Midium and Long Columns with Multi-cavity Steel Tubes
刊期 : 2022年第10期
关键词 : 多腔钢管混凝土;中长柱;再生混凝土;轴压性能;长细比
Key words : Concrete -filled multi-cavity steel tube; Medium and long column; Recycled concrete; Axial compression performance
刊期 : 2022年第10期
DOI : 10.19761/j.1000-4637.2022.10.040.06
文章编号 :
基金项目 : 四川省科技厅国际合作项目(2020YFH0127);广元城投集团科技基金(GYCT-KY-202101)。
作者 : 袁 凯1,邓夕胜2,梁 涛1,曾 智2,朱一林2
单位 : 1.广元市城市发展集团有限公司,四川 广元 628000;2.西南石油大学,四川 成都 610500

袁 凯1,邓夕胜2,梁 涛1,曾 智2,朱一林2

袁凯,邓夕胜,梁涛,等.多腔钢管再生混凝土复合中长柱轴压性能研究[J].混凝土与水泥制品,2022(10):40-44,59.

YUAN K,DENG X S,LIANG T,et al.Study on Axial Compression Performance of Recycled Concrete Composite Midium and Long Columns with Multi-cavity Steel Tubes[J].China Concrete and Cement Products,2022(10):40-44,59.

摘要
参数
结论
参考文献
引用本文

摘   要:为研究多腔钢管再生混凝土复合中长柱在受压状态下的力学性能,采用ABAQUS软件对多腔钢管中长柱在轴向压力下的荷载-位移曲线、破坏模态、受力过程进行了模拟,并研究了再生混凝土取代率和复合柱长细比对其轴压性能的影响。结果表明:多腔钢管中长柱破坏模式为弯曲破坏,外部再生混凝土和核心再生混凝土跨中截面破坏明显,核心混凝土受钢管约束承载力提高明显;随着再生混凝土取代率和长细比的增加,多腔钢管中长柱的承载能力、延性和刚度均减小,当长细比过大时,易发生失稳破坏。

Abstract: In order to study the axial compression performance of recycled concrete composite medium and long columns with multi-cavity steel tube. The load-displacement curve, failure mode and stress process of the recycled concrete composite medium and long columns with multi-cavity steel tube under axial pressure were studied by ABAQUS. The effects of replacement ratio of recycled concrete and slenderness ratio of components on load-displacement curve, ductility and stiffness of the composite miduim and long columns under axial pressure were also studied. The results show that the failure mode of recycled concrete medium and long columns with multi-cavity steel tube is bending failure, the failure of external recycled concrete and core recycled concrete in mid-span section is obvious, and the bearing capacity of core concrete is improved obviously. The bearing capacity, ductility and stiffness of recycled concrete composite medium and long columns with multi-cavity steel tube is decreased with the increase of replacement rate of recycled concrete and the slenderness ratio. The instability failure of recycled concrete composite medium and long columns with multi-cavity steel tube will occur when the slenderness ratio is too large.

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(1)在轴向压力作用下,由于二阶效应的影响,多腔钢管复合柱出现明显的侧向挠曲现象,且整体表现为弯曲破坏,1/2高截面处发生较为明显的屈曲变形。在复合结构共同作用下,多腔钢管复合柱的极限承载力较高、延性良好。
(2)随着再生混凝土取代率的增大,多腔钢管复合柱的极限承载能力、延性系数和刚度均仍有较高的极限承载力及较好的延性和刚度。
(3)随着长细比的增大,多腔钢管复合柱的延性系数和轴向刚度均降低,当长细比过大时,易发生失稳破坏。

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袁凯,邓夕胜,梁涛,.多腔钢管再生混凝土复合中长柱轴压性能研究[J].混凝土与水泥制品,2022(10):40-44,59.

YUAN K,DENG X S,LIANG T,et al.Study on Axial Compression Performance of Recycled Concrete Composite Midium and Long Columns with Multi-cavity Steel Tubes[J].China Concrete and Cement Products,2022(10):40-44,59.

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