[1] Pan Jinlong, Mo ChuangXu Li, Chen Junhan,. Seismic behaviors of steel reinforced ECC/RC composite columnsunder low-cyclic loading [J]. Journal of Southeast University (English Edition), 2017, 33 (1): 70-78. [doi:10.3969/j.issn.1003-7985.2017.01.012]
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Seismic behaviors of steel reinforced ECC/RC composite columnsunder low-cyclic loading(
)
低周反复荷载下钢筋增强ECC/混凝土组合柱抗震性能
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 33
- Issue:
- 2017 1
- Page:
- 70-78
- Research Field:
- Civil Engineering
- Publishing date:
- 2017-03-30
Info
- Title:
- Seismic behaviors of steel reinforced ECC/RC composite columnsunder low-cyclic loading
- 低周反复荷载下钢筋增强ECC/混凝土组合柱抗震性能
- Author(s):
- Pan Jinlong; Mo ChuangXu Li; 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; hysteretic curves; ductility; energy dissipation; parametric analysis
- 高延性纤维增强水泥基复合材料; ECC/混凝土组合柱; 滞回曲线; 延性; 耗能; 参数分析
- PACS:
- TU375.3
- DOI:
- 10.3969/j.issn.1003-7985.2017.01.012
- Abstract:
- To improve the seismic performance of columns, engineered cementitious composite(ECC)is introduced to partially substitute concrete at the base of the columns to form ECC/reinforced concrete(RC)composite columns. The mechanical behaviors of the ECC/RC composite columns are numerically studied under low-cyclic loading with the finite element analysis software of MSC.MARC. It is found that the ECC/RC composite columns can significantly enhance the load capacity, the ductility and energy dissipation of columns. Then, the effects of the height of the ECC, the axial compression ratio and the longitudinal reinforcement ratio on the seismic behaviors of the composite columns are parametrically studied. The results show that the ECC/RC composite column with a height of the ECC layer of 0.8h(h is the height to the cross-section)can achieve similar seismic performance of a full ECC column. The peak load of the composite column increases significantly while the ductility decreases with the increase of the axial compression ratio. Increasing the longitudinal reinforcement ratio within a certain range can improve the ductility and energy dissipation capacity and almost has no effect on load capacity. The analysis results are instructive and valuable for reference in designing ECC structures.
- 为提高柱的抗震性能, 采用高延性纤维增强水泥基复合材料(ECC)部分代替钢筋混凝土柱底部的混凝土得到ECC/RC组合柱.采用MSC.MARC有限元软件分析了组合柱在低周反复荷载作用下的受力性能.分析发现采用ECC/RC组合柱能够显著提高柱的承载力、延性和耗能能力.然后探究了ECC高度、轴压比和纵筋配筋率3个参数对ECC/RC组合柱抗震性能的影响.结果表明:ECC高度在0.8h(h为截面高度)左右的组合柱近似可以达到全ECC 柱的抗震性能;随着轴压比的增加, 组合柱的承载力增加, 而延性下降;在适当配筋的范围内, 提高配筋率可以提高组合柱的延性和耗能能力, 对承载力几乎无影响.分析结果对于ECC结构设计具有一定的指导意义和参考价值.
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Memo
- Memo:
-
Biography: Pan Jinlong(1976—), 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), the Third Five-Year Major Scientific and Technological Project of China Metallurgical Group Corporation.
Citation: Pan Jinlong, Mo Chuang, Xu Li, et al. Seismic behaviors of steel reinforced ECC/RC composite columns under low-cyclic loading[J].Journal of Southeast University(English Edition), 2017, 33(1):70-78.DOI:10.3969/j.issn.1003-7985.2017.01.012.