组合式十字形钢管混凝土柱轴压力学性能试验研究

谢力; 方旭; 陈梦成; 杨超; 黄宏

doi:10.13204/j.gyjz2018121501

组合式十字形钢管混凝土柱轴压力学性能试验研究

doi: 10.13204/j.gyjz2018121501

谢力^1,2,
方旭²,
陈梦成^1,2,
杨超^1,2,
黄宏^1,2

1. 华东交通大学轨道交通基础设施性能监测与保障国家重点实验室, 南昌 330013;
2. 华东交通大学土木建筑学院, 南昌 330013

基金项目:

国家自然科学基金项目(51378206)

江西省自然科学基金重点项目(20171BAB216044)。

详细信息

作者简介:
谢力,男,1978年出生,高级实验师。电子信箱:boshini@163.com

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出版历程
- 收稿日期: 2018-12-15
- 网络出版日期: 2023-05-25
- 刊出日期: 2023-02-20

Experimental Research on Mechanical Properties of Composite Cross-Shaped Concrete Filled Steel Tubular Column Under Axial Compression

1. State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang 330013, China;
2. College of Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China

摘要

摘要: 基于钢筋混凝土异形柱的设计思路,提出了一种组合式十字形钢管混凝土柱。利用方钢管和槽钢焊接形成有多腔室的钢管混凝土柱。以试件长度和截面形式为主要参数,共设计制作5个试件。通过对其进行轴心受压试验研究,考察了试件的破坏形态和荷载-应变关系曲线,并分析了各参数对此新型截面形式钢管混凝土柱轴压承载力和延性的影响。组合式十字形钢管混凝土试件最终破坏形态为沿试件长度方向分布多个较小鼓曲。试验结果表明,钢管对混凝土约束良好,该组合形式有效提高了十字形异形柱的承载力并改善了其延性;相同截面形式的组合式十字形钢管混凝土极限承载力随着柱高的增加,略有下降;相同柱高、不同截面形式的钢管混凝土柱,随着柱肢长度的增加,其极限承载力显著增加;在现行规范的基础上,提出了组合式十字形钢管混凝土柱轴压承载力计算公式,根据该公式计算所得理论值与试验值吻合较好。
- 异形柱 /
- 钢管混凝土 /
- 组合式十字形 /
- 承载力 /
- 延性
Abstract: Bosed on the design concept of reinforced concrete special-shaped column, a composite cross-shaped concrete filled steel tubular column formed by the welding of square steel tube and channel steel was put forward. Taking the length and cross-section form as the main parameters, 5 specimens were designed and fabricated. Through the axial compression test, the failure modes and load-strain curves of the specimens were investigated, and the effects of various parameters on the bearing capacity and ductility of the new section concrete filled steel tubular columns under axial compression were analyzed. The final faiure mode of composite cross-shaped concrete filled steel tube specimens was a number of small bulge distributed along the specimen length. The results showed that steel tube had good restraint to the concrete, this combination was effective to improve the bearing capacity of cross-shaped column and improve its ductility. The ultimate bearing capacity of specimens with the same cross-seotion form slightly decreased with the increase of column height while the specimens with the same column height and different cross-section forms significantly increased with the increase of column leg length, on the basis of current norms, the calculation formula for the bearing capacity of composite cross-shaped concrete filled steel tube columns under axial compression was proposed, the calculated results agreed well with the experimental results.
- composite cross-shaped /
- concrete filled steel tube /
- composite cross-shaped /
- bearing capacity /
- ductility

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参考文献(16)

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