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阿里甫江·夏木西,吐迪买买提·巴克,刘晓蕊. 同含钢率钢管与配筋钢管混凝土柱的受力性能分析[J]. 科学技术与工程, 2020, 20(30): 12520-12526.
ALIFUJIANG Xia-mu-xi,TUDIMAIMAITI Ba-ke,LIU Xiao-rui.Mechanical Properties of Concrete-Filled and Reinforced Concrete-Filled Steel Tube Columns with the Same Steel Ratio[J].Science Technology and Engineering,2020,20(30):12520-12526.
同含钢率钢管与配筋钢管混凝土柱的受力性能分析
Mechanical Properties of Concrete-Filled and Reinforced Concrete-Filled Steel Tube Columns with the Same Steel Ratio
投稿时间:2019-12-06  修订日期:2020-08-04
DOI:
中文关键词:  配筋钢管混凝土  纵筋  含钢率  有限元  承载力  延性
英文关键词:R-CFST  longitudinal reinforcement  steel ratio  finite element  bearing capacity  ductility
基金项目:国家自然科学基金资助项目(51968068)
        
作者单位
阿里甫江·夏木西 新疆大学建筑工程学院
吐迪买买提·巴克 新疆大学建筑工程学院
刘晓蕊 新疆大学建筑工程学院
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中文摘要:
      为阐明含钢率对构件的力学特性的影响规律,基于有限元分析方法研究了配筋钢管混凝土(R-CFST)和钢管混凝土(CFST)短柱的轴压性能。首先建立了适合R-CFST的材料本构模型和分析方法并用既有的实验数据验证模型的可靠性,之后进行了36根6种不同含钢率的R-CFST和对应的CFST有限元分析,通过分析荷载-位移响应、承载力、单位面积钢材对构件承载力提高量和延性等指标,最终发现:当混凝土强度较低时,含钢率越低CFST的承载力和延性比同含钢率R-CFST高,但随着混凝土强度的提高,含钢率越大反而使得R-CFST的性能得以显著提高;单位面积R-CFST纵筋对承载力的贡献率都大于单位面积的CFST钢管的贡献率,而且随着混凝土强度的提高R-CFST的这种贡献更为明显;填充高强度混凝土时,R-CFST比CFST更有效。由此得出结论:CFST内配筋比增加钢管壁厚更有效,尤其是填充高强度混凝土时配筋的效果更为明显。
英文摘要:
      In order to clarify effect of steel ratio on the compressive behaviors of Concrete-Filled Steel Tube (CFST) and Reinforced Concrete-Filled Steel Tube (R-CFST) columns, investigations were performed based on the finite element (F.E.) method. Material models and analyses method which are applicable for R-CFST were proposed and the model was validated using known experimental results, and then 36 models of R-CFST and respective CFST with 6 different steel ratios were analyzed. Load-displacement response, load bearing capacity, contribution of steel to the strength on per unit area and ductility were studied. The results show that: the bearing capacity and ductility of CFST are higher than that of R-CFST with the same steel ratio when the concrete strength and steel ratio are lower, the bearing capacity and ductility of R-CFST tend to increase with the increase of concrete strength and steel ratio; strength contribution of longitudinal reinforcement of R-CFST on per unit area is higher than strength contribution of steel tube of CFST on per unit area, and R-CFST’s contribution is more significant as concrete strength increases ; when filled with high-strength concrete, R-CFSTs are more effective than CFSTs. In conclusion, configuring reinforcement in CFST is more effect than increase of the steel tube wall-thickness, especially when filled with high-strength concrete.
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