超高性能混凝土梁抗剪承载力计算方法

发布时间：2018-03-12 08:37

本文选题：超高性能混凝土　切入点：抗剪承载力　出处：《华中科技大学学报(自然科学版)》2015年07期 　论文类型：期刊论文

【摘要】：分别采用极限平衡法、修正压力场理论和塑性理论对超高性能混凝土梁抗剪承载力进行分析.根据超高性能混凝土的力学特性,采用简化的Rankine破坏准则推导了极限平衡法求解超高性能混凝土梁抗剪承载力的相关公式;通过对修正压力场理论的相关方程进行修正,得到了适合计算超高性能混凝土梁抗剪承载力的相关方程;给出了用塑性理论求解超高性能混凝土梁抗剪承载力时塑性系数的取值方法.通过对9根试验梁和其他17根试验梁进行计算,结果表明:极限平衡法、修正压力场理论和塑性理论均能较好地预测超高性能混凝土梁的抗剪承载力,其中修正压力场理论计算结果比较保守,极限平衡法计算结果最接近实测值且变异系数最小.
[Abstract]:The ultimate equilibrium method, modified pressure field theory and plastic theory are used to analyze the shear capacity of UHPC beams. Using the simplified Rankine failure criterion, the formula of ultimate equilibrium method for calculating shear capacity of ultra-high performance concrete beams is derived, and the correlation equation of modified pressure field theory is modified. The relevant equations for calculating the shear capacity of ultra-high performance concrete beams are obtained. In this paper, the plasticity coefficient of ultra-high performance concrete beams is calculated by plastic theory. The results show that the limit equilibrium method is used to calculate 9 test beams and 17 other test beams. Both the modified pressure field theory and the plastic theory can well predict the shear capacity of ultra-high performance concrete beams. The calculated results of the modified pressure field theory are conservative and the limit equilibrium method is the closest to the measured values and the coefficient of variation is the least.
【作者单位】：北京工业大学工程抗震与结构诊治北京市重点实验室;河南理工大学土木工程学院;
【基金】：国家自然科学基金资助项目(51378032) 北京市自然科学基金资助项目(8142005) 高等学校博士学科点科研基金资助项目(201300050019) 河南理工大学青年基金资助项目(Q2014-08A)
【分类号】：TU375.1

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