铝粉加气钢管混凝土短柱轴压性能试验研究

Experimental Research on Axial Compressive Behavior of Steel Tubular Short Columns Filled with Aluminum-powder-aerated Concrete

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关键词:

铝粉加气钢管混凝土;轴压性能;弹性阶段最大轴力;极限承载力

Key words:

Aluminum-powdered aerated concrete; Axial compressive behavior; Maximum axial force of the elastic stage; Ultimate bearing capac

刊期:

2019年第4期

DOI:

10.19761/j.1000-4637.2019.04.042.04

文章编号:

基金项目:

国家自然科学基金项目(51508220);江苏省高校自然科学基金项目(16KJB570001、17KJB570001);江苏省建设系统科技项目(2017ZD098)

作者:

郭江培1,田安国1,2,巩妮娜2,张 锋2,蔡小宁2,顾欣欣1

单位:

1.中国矿业大学力学与土木工程学院,徐州 221116;2.淮海工学院土木与港海工程学院, 连云港 222005

摘要

摘   要:设计了4根铝粉加气自应力钢管混凝土短柱和2根普通钢管混凝土短柱,并进行了轴心受压对比试验。结果表明,自应力钢管混凝土柱具有强度高,预应力损失小的优点。在轴压试验受力初期的弹性阶段,其最大轴力提高至极限承载力的87%以上,极限承载力可提升15%左右,且预应力水平越高,提升越明显。预应力施加方法可大幅延长钢管混凝土柱的弹性阶段,改善正常使用阶段的性能。

Abstract: The axial compression tests of 4 aluminum-powder-aerated concrete filled steel tubular short columns and 2 ordinary concrete filled steel tubular short columns are studied. The results show that this type of self-stressing steel tube concrete column has the advantages of high strength and low prestress loss. In the elastic stage of the axial compression test, the maximum axial force is increased to more than 87% of the ultimate bearing capacity. The ultimate bearing capacity can be increased by about 15%. With the increase of prestress level, the ultimate bearing capacityincrease more obviously. The prestressing method can significantly extend the elastic stage and improve the performance during normal use.

结论

(1)利用掺加铝粉实现钢管混凝土短柱的预应力施加,铝粉与水泥浆的反应产生大量气泡,体积不断膨胀。这一反应主要发生在混凝土初凝之前,且持续40 min左右。
(2)钢管混凝土弹性阶段最大轴力可达极限承载力的87%以上,极限阶段承载力可提升15%左右,且水灰比越大,预应力水平越高,最大轴力提升越明显。

参考文献

[1] 张兆强. 内圆外方复合钢管高强混凝土短柱受压承载力计算[J].混凝土与水泥制品,2019(2):44-47.
[2] 黄承逵,常旭,姜德成,等.自应力钢管混凝土中核心混凝土单轴本构关系[J].大连理工大学学报,2010,50(1):81-85.
[3] Yuan X H,Ji W, Zhe-An L U,et al.Structural Analysis of Concrete-filled Steel Tube Prestressed Continuous Truss Beam Bridge Based on the Superposition Theory[J].Journal of Wuhan University of Technology,2012,34(7):102-106.
[4] Lee S Y,Park K H, Roh H.Experimental Fatigue Evaluation of Prestressed Concrete-Filled Steel Tube I-Shaped Bridge Girders[J].Advances in Structural Engineering,2013,16 (5):867-876.
[5] 尚作庆.钢管自应力自密实混凝土柱力学性能研究[D].大连:大连理工大学,2007.
[6] 郑璇,蒋志超,侯延利.自应力钢管轻骨料混凝土长柱的极限承载力分析[J].陕西建筑,2010(11):24-27.
[7] 龚独明.轻质高强泡沫混凝土的制备与性能研究[D].长沙:长沙理工大学,2013.
[8] 任胜鸽.谈铝粉发气速度对浇注稳定性的影响[J].加气混凝土,2008(2):26-27.
[9] Xiong D X, Zha X X.A numerical investigation on the behaviour of concrete-filled steel tubular columns under initial stresses[J].Journal of Constructional Steel Research,2007,63(5):599-611.
[10] 贾丽莉, 高育欣, 黄义雄,等.水胶比对于高强自应力钢管混凝土膨胀性能的影响[J].硅酸盐通报,2015,34(6):1620-1625.
[11] 李建涛,崔杰,王之宇.利用商洛钼尾矿制备混凝土保温砌块的试验研究[J].新型建筑材料,2015(3):80-83.
[12] 钟善桐.钢管混凝土统一理论:研究与应用[M].北京:清华大学出版社,2006.
[13] 郑远鹄,肖世卫,赵瑶琴,等.自预应力钢管混凝土受压构件极限承载力的计算[J].公路交通科技,2008,25(12):123-126.
[14] 常旭,蔺海晓,黄承逵.自应力钢管混凝土轴压短柱力学性能研究[J].河南理工大学学报,2009,28(4):496-501.
[15] 黄雅宁.自应力钢管混凝土设计理论研究[D].重庆:重庆交通大学,2010.

引用本文

郭江培,田安国,巩妮娜,等.铝粉加气钢管混凝土短柱轴压性能试验研究[J].混凝土与水泥制品,2019(4):42-45.

GUO J P,TIAN A G,GONG N N,et al.Experimental Research on Axial Compressive Behavior of Steel Tubular Short Columns Filled with Aluminum-powder-aerated Concrete[J].China Concrete and Cement Products,2019(4):42-45.


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