在循环负荷下有效预测混凝土构成模型的钢筋混凝土剪墙
Quoc Bao To1, Jiuk Shin2, Sung Jig Kim3
1Deep Learning Architecture Research Center, Department of Architectural Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea.
Materials (Basel, Switzerland)
|April 27, 2024
概括
温弗里斯模型准确地预测了在动态负载下钢筋混凝土墙的行为,在2D和3D结构中显示了高精度的强度和能量消耗.
科学领域:
- 结构工程 结构工程
- 计算力学 计算力学 计算力学
- 材料科学 材料科学 材料科学
背景情况:
- 在动态负载下建模钢筋混凝土 (RC) 墙壁存在挑战,原因是混凝土和钢的复杂非线性行为.
- 现有的构成模型很难准确地捕捉在物理系统中观察到的组合物质反应.
研究的目的:
- 评估和比较不同材料模型 (KCC,CDP,Winfrith) 在动态负载下模拟2D和3DRC墙壁的性能.
- 验证模型准确性与实验数据对比,用于预测结构性行为,包括强度和能量消耗.
主要方法:
- 使用LS-DYNA软件进行2D和3DRC墙壁的动态分析.
- 实施并将KCC (可塑性,损伤) 和CDP (可塑性,涂抹裂) 模型与Winfrith模型 (可塑性,涂抹裂) 进行比较.
- 与实验数据对比验证的模拟结果,以评估预测准确性.
主要成果:
- 温弗里斯模型在预测2D和3DRC墙壁的行为方面表现出卓越的性能.
- 对最大强度的准确预测以较低的误差实现 (例如,X方向的3D墙壁的3.28%).
- 温弗里斯模型在预测3D墙壁的能量消耗方面显示出高精度 (误差<7%).
结论:
- 温弗里斯材料模型是模拟RC墙壁动态响应的可靠工具.
- 该研究强调了模型选择对于在动态条件下准确的结构分析的重要性.
- 参数分析确定了影响结构行为的关键因素,包括混凝土的强度和拉伸率.
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