Reliability-based study on partial coefficient of recycled aggregate concrete

被引：0
|
作者：
Xiao J.-Z. [1 ,2 ]
Zhang K.-J. [1 ]
Hu B. [1 ]
Chen E.-C. [1 ]
机构：
[1] College of Civil Engineering, Tongji University, Shanghai
[2] State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai
来源：
Xiao, Jian-Zhuang (jzx@tongji.edu.cn) | 1600年 / Tsinghua University卷 / 34期
关键词：
Beams in bending; Partial coefficient; Recycled aggregate concrete (RAC); Reliability index; Strength variation;
D O I：
10.6052/j.issn.1000-4750.2015.12.0982
中图分类号：
学科分类号：
摘要：
In order to investigate the influence of recycled aggregate concrete (RAC) strength variation on RAC partial coefficients, using normal aggregate concrete (NAC) beams as references and keeping the same target reliability index, this paper analyzed RAC partial coefficients and RAC design strengths in three cases including RAC mean strength, standard strength and design strength, being the same as those of NAC, respectively. The results indicate that: when the reliability indexes of RAC beams reach the target reliability index under the same coefficient of variation (larger than that of NAC) of strength, the required reinforcement ratio is decreased while the required strength of concrete is increased as the case changes from same mean strength to same standard strength then to same design strength. From partial coefficient perspective, when the coefficient of variation of concrete is less than or equal to 0.15, the C30 and C40 RAC partial coefficients will be 1.41 and 1.35 for the case of same mean strength, 1.43 and 1.41 for the case of same standard strength, and 1.45 and 1.41 for the case of same design strength; and ensuring all of the RAC beams subjected to bending moment reach the target reliability. © 2017, Engineering Mechanics Press. All right reserved.
引用
收藏
页码：82 / 91
页数：9
相关论文
共 24 条
  • [1] Chen Z., Li L., Chen Y., Et al., Experimental study on mechanical properties of recycled concrete in tri-axial compression, Engineering Mechanics, 32, 7, pp. 56-63, (2015)
  • [2] Xiao J.Z., Li L., Shen L., Poon C.S., Compressive behaviour of recycled aggregate concrete under impact loading, Cement and Concrete Research, 71, pp. 46-55, (2015)
  • [3] Liu Z., Xue J., Ma H., Et al., Testing and numerical simulation of the normal cross-section bearing capacity of steel reinforced recycled concrete columns, Engineering Mechanics, 32, 1, pp. 81-87, (2015)
  • [4] Arezoumandi M., Smith A., Volz J.S., Khayat K.H., An experimental study on flexural strength of reinforced concrete beams with 100% recycled concrete aggregate, Engineering Structures, 88, pp. 154-162, (2015)
  • [5] Xiao J.Z., Tresserras J., Tam V., GFRP-tube confined RAC under axial and eccentric loading with and without expansive agent, Construction and Building Materials, 73, pp. 575-585, (2014)
  • [6] Xiao J., Lei B., Yuan B., Compressive strength distribution of recycled aggregate concrete derived from different origins, Journal of Building Structures, 29, 5, pp. 94-100, (2008)
  • [7] Gomez-Soberon J.M.V., Porosity of recycled concrete with substitution of recycled concrete aggregate, Cement and Concrete Research, 32, 8, pp. 1301-1311, (2002)
  • [8] Lin Y.H., Tyan Y.Y., Chang T.P., Chang C.Y., An assessment of optimal mixture for concrete made with recycled concrete aggregates, Cement and Concrete Research, 34, 8, pp. 1373-1380, (2004)
  • [9] Ulloa V.A., Garcia-Taengua E., Pelufo M., Domingo A., Serna P., New views on effect of recycled aggregates on concrete compressive strength, ACI Materials Journal, 110, 6, pp. 687-696, (2013)
  • [10] Li X., Wu Y., Shen S., Resistance partial factors for high strength steel rods and spiral strands, China Civil Engineering Journal, 41, 9, pp. 8-13, (2008)
123