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基于基面力元法钢纤维轻骨料混凝土损伤分析
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Abstract:
以势能原理的基面力元法为基础，本文建立了钢纤维轻骨料混凝土的分析模型，使用该模型对轴压作用下钢纤维轻骨料混凝土的破坏及力学性能进行了数值模拟，将计算结果与试验结果进行了对比，并对钢纤维混凝土的受压破坏进行了分析，探究了钢纤维长度对钢纤维轻骨料混凝土受压强度的影响。结果表明，采用该方法，钢纤维轻骨料混凝土的力学分析结果与宏观试验结果基本吻合，钢纤维长度过短或过长均会使混凝土受压强度下降。该模型可较为准确地反映钢纤维轻骨料混凝土的单轴受压破坏过程，为分析钢纤维轻骨料混凝土的力学性能提供了新路径。
In this paper, based on the base force element method of principle energy potential, an analytical model of steel fiber lightweight aggregate concrete is established. The model is used to numerically simulate the damage and mechanical properties of steel fiber lightweight aggregate concrete under axial compression. The calculated results are compared with experimental results, and the compression failure of steel fiber concrete is analyzed to explore the influence of steel fiber length on the compressive strength of steel fiber lightweight aggregate concrete. The results indicate that using this method, the mechanical analysis results of steel fiber lightweight aggregate concrete are in basic agreement with macroscopic experimental results. Moreover, both too-short and too-long steel fiber lengths result in decreased compressive strength of concrete. The model can accurately reflect the uniaxial compression failure process of steel fiber lightweight aggregate concrete and provides a new approach for analyzing the mechanical properties of steel fiber lightweight aggregate concrete.
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