Damage property and its calculation method of steel fiber reinforced concrete beam-column joints

被引：0
|
作者：
Gao D. [1 ,2 ]
You P. [1 ]
Shi K. [1 ,3 ]
机构：
[1] School of Civil Engineering, Zhengzhou University, Zhengzhou
[2] College of Civil Engineering, Henan University of Engineering, Zhengzhou
[3] School of Civil Engineering, Zhengzhou University of Aeronautics, Zhengzhou
来源：
| 2017年 / Science Press卷 / 38期
关键词：
Beam-column joint; Damage model; Damage property; Reversed loading; Steel fiber reinforced concrete;
D O I：
10.14006/j.jzjgxb.2017.11.010
中图分类号：
学科分类号：
摘要：
Damage evolution characteristics of steel fiber reinforced concrete (SFRC) beam-column joints with reinforcements were analyzed based on the low cycle reversed loading experimental results. A calculating model for damage property of SFRC beam-column joints with reinforcements under cyclic load was established based on the simultaneous usage of the indexes of the deformation and cumulated energy dissipation, and the major effective factors on damage property of SFRC beam-column joints with reinforcements were analyzed. The results show that the steel fiber volumetric ratio, stirrup ratio and axial compression ratio are the major effective factors on damage property of SFRC beam-column joints with reinforcements. Under the same loading cycle numbers, the damage of the beam-column joints decreases as the steel fiber volumetric ratio, stirrup ratio and axial compression ratio grow. As all the other experiment parameters are fixed for the beam-column joints, compared with the steel fiber volumetric ratio of 0.5%, when the steel fiber volumetric ratios are 1.0% and 1.5%, the slope of damage curves at the failure point decreases 21.6% and 34.7%, respectively. Compared with the beam-column joint without stirrup, when the stirrup ratios are 0.6% and 1.2%, the slope of damage curves at the failure point decreases 36.9% and 59.4%, respectively. And compared with the beam-column joint with the axial compression ratio of 0.2, when the axial compression ratios are 0.3 and 0.4, the slope of damage curves at the failure point decreases 12.5% and 17.1%, respectively. The proposed model can reasonably represent the damage evolution characteristics and describe the damage evolution process of beam-column joints. © 2017, Editorial Office of Journal of Building Structures. All right reserved.
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页码：82 / 92
页数：10
相关论文
共 23 条
  • [1] Tang J.R., Hu C.B., Yang K.J., Et al., Seismic behavior and shear strength of frames joint using steel-fiber reinforced concrete, Journal of Structural Engineering, ASCE, 118, 2, pp. 341-358, (1992)
  • [2] Banon H., Biggs J.M., Irvine H.M., Seismic damage in reinforced concrete frames, Journal of Structural Engineering, ASCE, 107, 9, pp. 1713-1792, (1981)
  • [3] Darwin D., Nmai C.K., Energy dissipation in RC beams under cyclic load, Journal of Structural Engineering, ASCE, 112, 8, pp. 1829-1846, (1986)
  • [4] Stephens J.E., Yao J.T.P., Damage assessment using response measurements, Journal of Structural Engineering, ASCE, 113, 4, pp. 787-801, (1987)
  • [5] Park Y.J., Ang H.S., Mechanistic seismic damage model for reinforced concrete, Journal of Structural Engineering, ASCE, 111, 4, pp. 722-739, (1985)
  • [6] Rao S.P., Sarma S.B., Lakshmanan N., Stangenberg F., Damage model for reinforced concrete elements under cyclic loading, ACI Structural Journal, 95, 6, pp. 682-690, (1998)
  • [7] Niu D., Ren L., A modified seismic damage model with double variables for reinforced concrete structures, Journal of Earthquake Engineering and Engineering Vibration, 16, 4, pp. 44-54, (1996)
  • [8] Li J., Zhao S., Damage model of reinforced concrete member, Journal of Lanzhou Railway University, 19, 3, pp. 25-27, (2000)
  • [9] Wang B., Zheng S., Guo X., Et al., Seismic damage analysis for SRHSHPC frame columns, Engineering Mechanics, 29, 2, pp. 61-68, (2012)
  • [10] Gao D., Shi K., Zhao S., Calculation method for bearing capacity of steel fiber reinforced high-strength concrete beam-column joints, Journal of Building Structures, 35, 2, pp. 71-79, (2014)
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