[1] Shan Qifeng, Pan Jinlong, Chen Junhan,. Mechanical behaviors of steel reinforced ECC/concrete compositecolumns under combined vertical and horizontal loading [J]. Journal of Southeast University (English Edition), 2015, 31 (2): 259-265. [doi:10.3969/j.issn.1003-7985.2015.02.018]
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Mechanical behaviors of steel reinforced ECC/concrete compositecolumns under combined vertical and horizontal loading(
)
钢筋增强ECC/混凝土组合柱压弯性能分析
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 31
- Issue:
- 2015 2
- Page:
- 259-265
- Research Field:
- Civil Engineering
- Publishing date:
- 2015-06-20
Info
- Title:
- Mechanical behaviors of steel reinforced ECC/concrete compositecolumns under combined vertical and horizontal loading
- 钢筋增强ECC/混凝土组合柱压弯性能分析
- Author(s):
- Shan Qifeng, Pan Jinlong, Chen Junhan
- Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
- Keywords:
- engineered cementitious composites(ECC); ECC/RC composite columns; compression-bending behavior; numerical analysis; parametric analysis
- PACS:
- TU375
- DOI:
- 10.3969/j.issn.1003-7985.2015.02.018
- Abstract:
- In order to improve the load capacity, seismic performance and performance-cost ratio of the columns, the concrete at the base of reinforced concrete(RC)columns is substituted with engineered cementitious composites(ECC)to form ECC/RC composite columns. Based on the existing material properties, the mechanical behaviors of the ECC columns, ECC/RC composite columns and RC columns were numerically studied under combined vertical and horizontal loading with the software of ATENA. Then, the failure mechanism of ECC columns and ECC/RC composite columns were comprehensively studied and compared with that of the RC columns. Then, the effects of the height of the ECC, the axial compression ratio, and the transverse reinforcement ratio on the mechanical behaviors of the composite or the ECC column are studied. The calculation results show that the ultimate load capacity, ductility and crack resistance of the ECC or ECC/RC composite columns are superior to those of the RC columns. The ECC/RC composite column with a height of the ECC layer of 1.2h(h is the height of the cross section)can achieve similar mechanical properties of a full ECC column. With high shear strength, ECC can undertake the shear force and significantly reduce the amount of stirrups, avoiding construction issues and promoting its engineering application.
- 为了提高柱的承载力、抗震性能和性价比, 采用工程水泥基复合材料(ECC)材料替代钢筋混凝土(RC)柱柱根区域的混凝土形成ECC/RC组合柱.基于已有的材料性能试验数据, 采用ATENA有限元软件对ECC柱、ECC/RC组合柱及RC柱的压弯性能进行数值分析.研究了ECC柱和ECC/RC组合柱的破坏机理, 并与RC柱进行对比, 进而探究ECC高度、轴压比和体积配箍率3个参数对ECC/RC组合柱或ECC柱压弯性能的影响.结果表明:ECC柱和ECC/RC组合柱较RC柱具有更高的承载力、延性和抗裂能力;ECC高度在1.2h(h为截面高度)左右的组合柱即可达到全ECC柱的性能效果;ECC具有较高的抗剪强度, 能显著减小箍筋的配置, 便于施工和促进实际工程应用.
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Memo
- Memo:
-
Biographies: Shan Qifeng(1990—), male, graduate; Pan Jinlong(corresponding author), male, doctor, professor, jinlongp@gmail.com.
Foundation items: The National Natural Science Foundation of China(No.51278118), the Natural Science Foundation of Jiangsu Province(No.BK2012756), the Key Project of Ministry of Education of China(No.113029A).
Citation: Shan Qifeng, Pan Jinlong, Chen Junhan. Mechanical behaviors of steel reinforced ECC/concrete composite columns under combined vertical and horizontal loading[J].Journal of Southeast University(English Edition), 2015, 31(2):259-265.[doi:10.3969/j.issn.1003-7985.2015.02.018]