Multiscale analysis on deformation performance of reinforced concrete shear wall
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作为一种典型的非均质复合材料，混凝土的细观结构对钢筋混凝土剪力墙的变形性能具有显著影响。本文采用随机骨料法构建钢筋混凝土剪力墙构件关键部位混凝土的细观结构模型，同时采用均质宏观单元模拟构件上部，从而建立一种能够同时反映构件宏观变形特性和混凝土细观损伤过程的多尺度分析模型。基于该多尺度模型，系统研究了骨料分布形态及其几何形状对损伤发展路径和荷载-位移曲线的影响规律。结果表明：骨料随机分布对构件损伤模式影响较小；与圆形骨料相比，采用多边形骨料能更准确地表征钢筋混凝土剪力墙变形特性。不同截面厚度和轴压比剪力墙在单调推覆荷载作用下的模拟结果显示，与宏观模型相比，多尺度模型的荷载-变形曲线与试验结果吻合度更高，验证了该模型的模拟精度和计算可靠性。
Abstract：As a typical heterogeneous composite material, the concrete mesostructure significantly influences the deformation performance of reinforced concrete(RC) shear wall. In this study, the random aggregate method was adopted to establish mesostructural models for concrete at critical positions of reinforced concrete shear wall components. The upper portion was simulated using macroscopic elements based on the homogeneous assumption, so as to develop a multiscale analysis model that can simultaneously reflect the macroscopic deformation characteristics of components and the mesoscopic damage evolution of concrete. Based on the multiscale model, the effects of aggregate distribution and shape on the damage process and load-displacement curves were analyzed. The results show that random aggregate distribution has slight effect on the damage mode. Compared with circular aggregates, polygonal aggregates are more suitable for studying the deformation performance of RC walls. Simulations of shear walls with different wall thicknesses and axial compression ratios under monotonic pushover loads indicate that the load-deformation curves calculated by the multiscale model agree better with experimental data relative to the macroscopic model, which verifies the simulation accuracy and validity of the proposed model.
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基本信息:
DOI：10.13764/j.cnki.ncdg.20260803.001
中图分类号:TU398.2
引用信息:
[1]黄勇,欧阳雪.钢筋混凝土剪力墙变形性能多尺度分析[J].南昌大学学报(工科版),2026,48(04):380-386+398.DOI:10.13764/j.cnki.ncdg.20260803.001.
基金信息:
湖南省自然科学基金资助项目（2024JJ6719）
2026-08-03
2026-08-03
2026-08-03