西安建筑科技大学学报(自然科学版)

以再生块体强度、再生块体粒径、自密实混凝土强度、轴向力偏心距、钢管壁厚为参数,设计制作了12根试件,通过对其进行了偏心受压承载力试验,以研究钢管-RBSCC短柱偏心受压性能.研究表明:再生块体强度、自密实混凝土强度、含钢率对偏心受压承载力产生正相关影响; 偏心距对偏心受压承载力产生负相关的影响,且影响程度最大; 再生块体粒径对偏压承载力产生正相关的影响,但影响程度较小,实际计算时,可以忽略; 针对该类结构可采用本文建议的钢管-RBSCC短柱偏心受压承载力计算方法进行计算,为废弃混凝土的工程应用提供了一种途径.

Taking the RB strength, RB particle size, SCC strength, eccentricity of axial force and wall thickness of steel pipe as parameters, 12 specimens are designed and manufactured in this paper. Through the eccentric compression bearing capacity test, the eccentric compression performance of steel tube RBSCC short column is studied. The results show that the RB strength, the SCC strength and the steel content have a positive correlation effect on the eccentric compression bearing capacity; Eccentricity has a negative correlation effect on the bearing capacity of eccentric compression, and the influence degree is the largest; The RB particle size has a positive correlation effect on the eccentric bearing capacity, but the influence degree is small, which can be ignored in the actual calculation; For this kind of structure, the calculation method of eccentric compression bearing capacity of steel tube RBSCC short column proposed in this paper can be used to calculate, which provides a way for the engineering application of waste concrete.

引言
1 试验概况
2 试验结果与分析
3 承载力计算
4 结论

表1 钢材参数
Tab.1 Steel parameters

图1 再生块体
Fig.1 Regenerated block

表2 自密实混凝土材料掺量及立方体试块抗压强度<br/>Tab.2 Material content of SCC and the strength of the cube

表2 自密实混凝土材料掺量及立方体试块抗压强度
Tab.2 Material content of SCC and the strength of the cube

表3 偏压试件参数<br/>Tab.3 Parameters of eccentric compression members

表3 偏压试件参数
Tab.3 Parameters of eccentric compression members

图2 试件浇筑
Fig.2 Casting the specimens

图3 试件养护<br/>Fig.3 Maintenance of the specimens

图3 试件养护
Fig.3 Maintenance of the specimens

表4 立方体试块分组
Tab.4 Grouping of cubes

图4 偏压试验加载装置
Fig.4

图5 偏压试件变形图<br/>Fig.5 Deformation diagram of eccentric compression specimens

图5 偏压试件变形图
Fig.5 Deformation diagram of eccentric compression specimens

图6 混合混凝土破坏图<br/>Fig.6 Failure diagram of mixed concrete

图6 混合混凝土破坏图
Fig.6 Failure diagram of mixed concrete

图7 荷载-侧向位移曲线图<br/>Fig.7 Load-lateral displacement

图7 荷载-侧向位移曲线图
Fig.7 Load-lateral displacement

图8 五种参数变化对荷载-纵向应变曲线的影响<br/>Fig.8 The influence of five parameters on load-vertical strain curve

图8 五种参数变化对荷载-纵向应变曲线的影响
Fig.8 The influence of five parameters on load-vertical strain curve

[1]牛海成,曹万林,董宏英,等.钢管高强再生混凝土柱轴压性能试验研究[J].建筑结构学报,2015, 36(6):128-135.
[2]WANG Y Y, CHEN J, GENG Y. Testing and analysis of axially loaded normal-strength recycled aggregate concrete filled steel tubular stub columns[J]. Engineering Structures, 2015, 86: 192-212.
[3]CAO V V. Experimental behaviour of recycled aggregate concrete-filled steel tubes under axial loading[J]. International Journal of Civil Engineering, 2019(17):1341-1351.
[4]吴波,刘伟,刘琼祥,等.薄壁钢管再生混合短柱轴压性能试验研究[J].建筑结构学报.2010.31(8):22-28.
[5]吴波,陈宇菲.再生块体混凝土板的冲切性能试验研究[J].华南理工大学学报(自然科学版),2019.47(8):1-8.
[6]吴波,刘璐,赵霄龙.自密实再生混合混凝土的单轴受压试验研究[J].建筑结构学报,2016,37(2):74-78,126.
[7]吴波,赵新宇,杨勇.采用大尺度废弃混凝土的再生混合构件研究进展[J].华南理工大学学报(自然科学版),2012,40(10):174-183.
[8]吴波,刘伟,刘琼祥,等.薄壁钢管再生混合短柱轴压性能试验研究[J].建筑结构学报,2010,31(8):22-28.
[9]WU B.ZHANG S, YANG Y, Compressive behaviors of cubes and cylinders made of normal-strength demolished concrete blocks and high-strength fresh concrete[J].Construction and Building Materials, 2015, 78:342-353.
[10]蔡绍怀.现代钢管混凝土结构[M].北京:人民交通出版社,2003.
[11]钟善桐.钢管混凝土结构[M]. 第3版.北京: 清华大学出版社, 2003.
[12]中华人民共和国住房与城乡建设部.自密实混凝土应用技术规程,JGJ/T 283-2012[S]. 北京:中国建筑工业出版社, 2012.
[13]冯乃谦,叶浩文,马展祥.超高性能自密实混凝土的研发与超高泵送技术[J]. 施工技术, 2018, 47(6): 117-122.
[14]徐仁崇,陈茜,苏艺凡,等. C30～C60自密实混凝土的配制及性能研究[J]. 混凝土与水泥制品, 2014,(2): 9-12.
[15]余志武,潘志宏,谢友均,等.浅谈自密实高性能混凝土配合比的计算方法[J]. 混凝土, 2004(1): 54-57.
[16]安雪晖,金峰,石建军.自密实混凝土充填堆石体试验研究[J]. 混凝土, 2005,(1): 3-6.
[17]LIU Wenju,PAN Jianwen. Filling capacity evaluation of self-compacting concrete in rock-filled concrete.[J]. Materials(Basel, Switzerland),2019,13(1):108.
[18]ASLANI F,SAMALI B.Constitutive relationships for self-compacting concrete at elevated temperatures[J]. 2015,48(1):337-356.
[19]ANATOLY L, KRISHAN, MARIA A, et al. Strength of axially loaded concrete filled steel tube elements of self-stressing concrete[J]. Key Engineering Materials,2019,792:160-165.
[20]YU Feng,LIN Longlong,FANG Yuan,et al.Mechanical behavior of recycled coarse aggregates self compacting concrete filled steel tubular columns under eccentric compression[J].Structural Concrete,2019,20(6):2000-2014.
[21]LEILA Shahryari,MARYAM Nafisinia,MOHAMMAD Hadi Fattahi. Investigation of effects of recycled aggregates and blast furnace slagon properties of self-compacting concrete[J]. NEDUET Journal of Research,2020,XVII(3):1-14.

备注

引言

1 试验概况

2 试验结果与分析

3 承载力计算

4 结论

期刊信息