长期荷载作用对钢管约束的组合短柱变形及承载力的影响

李艳华; 张素梅; 王焰; 王玉银

doi:10.13204/j.gyjzG21120112

长期荷载作用对钢管约束的组合短柱变形及承载力的影响

doi: 10.13204/j.gyjzG21120112

1. 哈尔滨工业大学(深圳)土木与环境工程学院, 广东深圳 518000;
2. 哈尔滨工业大学土木工程学院, 哈尔滨 150090

基金项目:

深圳市高层次人才项目。

详细信息

作者简介:
李艳华,女,1994年出生,硕士。

通讯作者:
张素梅,女,1963年出生,博士,教授,博士生导师,smzhang@hit.edu.cn。

计量
- 文章访问数: 62
- HTML全文浏览量: 17
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2021-12-01
- 网络出版日期: 2023-05-25
- 刊出日期: 2023-01-20

Effect of Long-Term Loading on Deformation and Bearing Capacity of Steel Tube-Constrained Composite Columns

1. Civil and Environmental Engineering, Harbin Institute of Technology(Shenzhen), Shenzhen 518000, China;
2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China

摘要

摘要: 为研究长期荷载作用对钢管约束钢管混凝土柱、钢管约束钢筋混凝土柱和钢管约束型钢混凝土柱变形和承载力的影响,设计并制作了12个钢管约束钢管混凝土短柱、9个钢管约束型钢混凝土短柱和6个钢管约束钢筋混凝土短柱试件,对其中的4个钢管约束钢筋混凝土短柱、6个钢管约束型钢混凝土短柱和8个钢管约束钢管混凝土短柱进行了760 d的持荷试验,随后对所有试件进行了轴压承载力试验。主要研究参数混凝土强度等级为C50和C70,加载时核心混凝土龄期分别为7,14,28 d。对比分析了各类试件长期变形性能和持荷760 d对试件轴压性能的影响,结果表明:1)3类试件的长期变形均主要发生在加载前期,呈现出前期增长较快、后期随时间增长而逐渐减慢的趋势,其中钢管约束钢管混凝土试件的长期变形最小;2)低应力长期荷载作用、核心混凝土及夹层混凝土的长期变形对此3类试件的轴压承载力几乎无影响;试件类型、加载龄期和混凝土强度等级对试件承载力的影响较小;3)是否预先受载对试件破坏模式没有显著影响,钢管约束钢筋混凝土和钢管约束型钢混凝土试件均表现为明显的剪切破坏,而加载龄期较早或混凝土强度中等的钢管约束钢管混凝土试件呈现较好的腰鼓型截面压溃破坏。
- 长期荷载 /
- 钢管约束组合短柱 /
- 长期变形 /
- 收缩徐变 /
- 承载力 /
- 轴压试验
Abstract: 12 steel-tube-confined concrete-filled steel tube columns(TCFST), 6 tubed reinforced concrete columns (TRC) and 9 tubed steel reinforced concrete columns(TSRC) were designed to study the effect of long-term loading on the deformation and bearing capacity. Among them,8 TCFST, 6 TSRC and 4 TRC short columns were loaded for a total of 760 days. Then the axial compression tests were conducted on all the above columns. The main concerned parameters were concrete strength grade (C50 and C70), and core concrete ages at the time of loading application (7 d, 14 d and 28 d). The long-term deformation properties of the columns and the influence of 760-day sustained loading on their mechanical properties were compared and analyzed. The results showed that: 1) the long-term deformation of the three types of short columns occurred mainly in the early stage of the loading, showing a rapid increase in the early stage and a gradual slowdown in the later stage. The long-term deformation of the TCFST columns was the smallest comparing with the other two; 2) the low-stress long-term loading, long-term deformation of core concrete, as well as interlayer concrete had almost no effect on the bearing capacity of the columns under axial compression; the type of specimens, loading age and concrete strength grade had little effect on the bearing capacity; 3) the column failure modes were not influenced by the existence of long-term loading. TSRC columns and TRC columns showed an obvious shear failure, while the TCFST columns with loading in early age or moderate concrete strength grade occurred ductile squash failure.
- long-term loading /
- steel tube-constrained composite columns /
- long-term defermation /
- shrinkage and creep /
- bearing capacity /
- axial compressive test

HTML全文

参考文献(29)

[1]	聂建国,陶慕轩,吴丽丽,等.钢-混凝土组合结构桥梁研究新进展[J].土木工程学报,2012,45(6):110-122.
[2]	卢炜.钢管约束的钢管混凝土短柱轴压性能研究[D].哈尔滨:哈尔滨工业大学,2018.
[3]	聂建国,余志武.钢-混凝土组合梁在我国的研究及应用[J].土木工程学报,1999,32(2):3-8.
[4]	韩林海,牟廷敏,王法承,等.钢管混凝土混合结构设计原理及其在桥梁工程中的应用[J].土木工程学报,2020,53(5):1-24.
[5]	席龙辉.钢管混凝土结构在桥梁建设中的应用分析[J].住宅与房地产,2020(24):195-196.
[6]	李健.圆钢管约束的钢管混凝土短柱基本力学性能研究[D].哈尔滨:哈尔滨工业大学,2018.
[7]	张素梅,李孝忠,卢炜,等.钢管约束的钢管混凝土短柱轴压性能试验研究[J].建筑结构学报,2022,43(6):21-33.
[8]	NIE J G, WANG J J, GOU S K, et al. Technological development and engineering applications of novel steel-concrete composite structures[J]. Frontiers of Structural and Civil Engineering, 2019, 13(1):1-14.
[9]	谭满江,刘朝晖.钢-混凝土组合结构在城市轨道交通中的应用[J].水电站设计,2020,36(2):61-64.
[10]	WANG H L, SUN T, TANG C, et al. Experimental and numerical investigation of steel-ultra-high-performance concrete continuous composite beam behavior[J]. Advances in Structural Engineering, 2020, 23(10):2220-2236.
[11]	陈松林.钢管混凝土收缩徐变试验研究[D].广州:广州大学,2018.
[12]	陈星,罗赤宇,王华林,等.高层建筑钢-混凝土混合结构的创新与应用[J].建筑结构,2020,50(10):1-11.
[13]	LIU W B, ZHOU H, ZHANG S G, et al. Constitutive model of concrete creep damage considering the deterioration of creep parameters[J]. Construction and Building Materials, 2021, 308(15):1-15.
[14]	周敏,杨腾宇,邱冰,等.粗骨料种类和品质对C60混凝土徐变性能的影响[J].新型建筑材料,2021,48(8):21-24.
[15]	丁孝斌,吴昊天,胡成杰.混凝土收缩徐变机理与影响因素综述[J].四川水泥,2020(8):22-26.
[16]	黄永辉,刘爱荣,傅继阳,等.高强钢管高强混凝土徐变特性试验研究[J].工程力学,2021,38(8):204-212.
[17]	张戎令,郝兆峰,王起才,等.核心混凝土缺陷对钢管混凝土构件徐变影响规律及预测模型研究[J].材料导报,2021,35(4):4099-4104.
[18]	MICHEAL A, GEORGE M. Evaluating prediction models of creep and drying shrinkage of self-consolidating concrete containing supplementary cementitious materials/fillers[J]. Applied Sciences, 2021, 11(16):7345-7345.
[19]	毕伟,尚帆,李明.混凝土收缩和徐变对高层建筑结构影响分析[J].混凝土与水泥制品,2020(2):71-76.
[20]	赵卫红.混凝土收缩徐变对桥梁施工控制的影响[J].黑龙江交通科技,2020,43(8):124-125.
[21]	陈庞.混凝土的徐变及其对构件受力性能的影响[D].哈尔滨:哈尔滨工业大学,2020.
[22]	HE S Q, ZHU Z F, LYU M, et al. Experimental study on the creep behaviour of rock-filled concrete and self-compacting concrete[J]. Construction and Building Materials, 2018, 186(20):53-61.
[23]	王焰.长期荷载作用下钢管约束钢管混凝土轴压短柱徐变性能[D].哈尔滨:哈尔滨工业大学,2020.
[24]	陈杰.圆钢管再生混凝土轴压构件长期静力性能研究[D].哈尔滨:哈尔滨工业大学,2016.
[25]	唐迪未,金伟良,毛江鸿,等.收缩徐变对装配式混凝土叠合梁挠度的影响[J].土木与环境工程学报(中英文),2019,41(6):127-134.
[26]	李翔.长期荷载作用下钢管约束钢筋混凝土轴压短柱徐变性能[D].哈尔滨:哈尔滨工业大学,2019.
[27]	中华人民共和国住房和城乡建设部.混凝土物理力学性能试验方法标准:GB/T 50081-2019[S].北京:中国建筑工业出版社,2019.
[28]	过镇海.混凝土的强度和本构关系[M].北京:中国建筑工业出版社,2004.
[29]	全国钢标准化技术委员会.金属材料拉伸试验第1部分:室温试验方法:GB/T 228.1-2010[S].北京:中国标准出版社,2010.