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发布时间:2020-01-06 00:00:00
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水泥混凝土制品

配筋UHPC构件轴心受拉承载力计算研究
配筋UHPC构件轴心受拉承载力计算研究
  • 孙 科1,郑伟锋1,李志刚1,舒 恺1,王朴炎1,周 剑2,薛事成3, 吴香国3,*,赵 毅2
2024年第1期
摘要
引用本文
摘   要:为了研究配筋超高性能混凝土(RUHPC)轴心受拉构件承载力计算公式,基于试验统计数据,分析了纵筋配筋率、钢纤维掺量对构件轴心抗拉承载力的影响,并在现行混凝土结构设计规范计算模型基础上,简化了正截面承载力计算公式,给出了受拉区等效应力计算系数建议值,可靠指标分析满足要求。 Abstract: In order to study the calculation formula for the bearing capacity of reinforced ultra-high performance concrete (RUHPC) axial tension components, based on the experimental statistical data, the influence of longitudinal reinforcement ratio and steel fiber content on the axial tensile bearing capacity of components was analyzed. According to the current calculation mode of concrete structure design specifications, a simplified calculation expression for the normal section bearing capacity of RUHPC axial tension compenents was proposed, and a recommended value for the equivalent stress calculation coefficient in the UHPC tensile zone was proposed. The reliability analysis of components meets the relevant requirements.
孙科,郑伟锋,李志刚,等.配筋UHPC构件轴心受拉承载力计算研究[J].混凝土与水泥制品,2024(1):47-50,55. SUN K,ZHENG W F,LI Z G,et al.Study on calculation of axial tensile capacity of reinforced ultra-high performance concrete components[J].China Concrete and Cement Products,2024(1):47-50,55.
HRB500钢筋轻骨料混凝土柱轴压承载力试验研究及可靠度分析
HRB500钢筋轻骨料混凝土柱轴压承载力试验研究及可靠度分析
  • 张 威,邵永健*,朱号令
2024年第1期
摘要
引用本文
摘   要:为了研究高强钢筋页岩陶粒混凝土轴压柱的承载力,制作了8根试件,研究了配筋率、配箍率、混凝土强度等对其承载力和破坏形态的影响。此外,得到了相关文献的有关统计参数,采用JC法,并利用Matlab软件编程迭代求解高强钢筋页岩陶粒混凝土轴压柱的可靠度指标。结果表明:在其他设计参数相同前提下,轴压柱的可靠度指标随着配筋率、配箍率、稳定系数以及截面面积的增大而增大,随着荷载效应比的增大而降低;JGJ/T 12—2019《轻骨料混凝土应用技术标准》中的轴心受压承载力计算公式可以满足GB 50068—2018《建筑结构可靠性设计统一标准》中的可靠指标要求。 Abstract: In order to study the reliability of high-strength reinforced shale ceramsite concrete columns under axial compression, 8 specimens were made and the effects of factors such as reinforcement ratio, hoop ratio, and concrete strength on the bearing capacity and failure mode were studied. In addition, relevant statistical parameters of the specimens were obtained by analyzing relevant literature, and the JC method was used to iteratively solve the reliability index of high-strength reinforced shale ceramsite concrete axial compression columns by using Matlab software programming.  The results show that under the same design parameters, the reliability index of axial compression columns increases with the increase of reinforcement ratio, hoop ratio, concrete strength, and cross-sectional area, but decreases with the increase of load ratio. The analysis also indicates that the formula for calculating the axial compressive bearing capacity of the JGJ/T 12—2019 Technical Standard for Application of Lightweight Aggregate Concrete can meet the requirements of the reliability index in the GB 50068—2018 Unified Standard for Reliability Design of Building Structures.
张威,邵永健,朱号令.HRB500钢筋轻骨料混凝土柱轴压承载力试验研究及可靠度分析[J].混凝土与水泥制品,2024(1):51-55. ZHANG W,SHAO Y J,ZHU H L,et al.Test and reliability analysis of the axial compressive bearing capacity of HRB500 reinforced lightweight aggregate concrete columns[J].China Concrete and Cement Products,2024(1):51-55.
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