FRP管钢骨高强混凝土柱受压承载力计算方法

Calculation Method for Compressive Bearing Capacity of FRP Tube Columns Filled with Steel-Reinforced High-Strength Concrete

目的研究纤维增强复合材料管钢骨高强混凝土柱承载力计算方法.方法通过叠加法和极限平衡法,研究FRP管钢骨高强混凝土轴压、偏压柱的承载力计算方法,提出FRP管钢骨高强混凝土柱在不同含骨率条件下的轴压承载力计算公式以及偏压承载力计算公式.结果将公式所得的计算结果与试验结果进行对比分析,发现实测承载力与叠加法计算的含骨率不为零时轴压承载力比的平均值为1.085,均方差为0.024;实测承载力与极限平衡法计算的含骨率不为零时轴压承载力比的平均值为1.110,均方差为0.025;实测承载力与含骨率为零时轴压承载力计算方法计算的承载力比的平均值为1.013,均方差为0.082;实测承载力与偏压计算方法计算的承载力比的平均值为1.039,均方差为0.108.结论根据试验数据与本文中所给公式的计算结果吻合良好,证明了该公式的正确性.

Based on the methods of superposition and limit equilibrium, this paper studied the cal- culation method for compressive bearing capacity of FRP tube columns filled with steel-reinforced high-strength concrete subjected to axial and eccentric compression loading. Some calculation for- mulas for bearing capacity of FRP tube SHC columns with different steel-reinforced rates under ax- ial and eccentric compression loads were proposed. Comparisons of the calculation results and the test results were also carried out. It is found that in the case with steel-reinforced, using the super-position method, the average ratio of the measured bearing capacity values and the calculated ca- pacity values for FRP tube SHC columns under axial compression loading is 1. 085, with a mean square deviation 0. 024. By the limit equilibrium method, the average ratio of the measured capaci- ty values and the calculated values for the same columns under axial compression is 1.110, with a mean square deviation 0. 025. For the case without steel-reinforced, the average ratio of the meas- ured beating capacity values and the calculated values of FRP tube SHC columns under axial compression is 1. 013 with a mean square deviation 0. 082. The average ratio of the measured values and the calculated values of the columns under eccentric loading is 1. 039, with a mean square de viation 0. 108. The above mentioned comparative results show that the calculated values of the proposed formulas are in good agreement with the measured data, which proves the correctness of the formulas.