论文部分内容阅读
研究目的:研究混凝土拱坝多尺度横缝单元和坝体损伤。创新要点:解决了拱坝坝段单元采用不同剖分形式(即多尺度剖分形式)时,在静动力荷载下,拱坝横缝开度和坝体损伤的计算。研究方法:首先建立大尺度交接面单元和小尺度单元坝段自由度耦合,然后建立大尺度交接面单元和大尺度单元坝段横缝单元模型,并对坝体损伤本构的计算进行研究。重要结论:通过对比计算发现,通过混凝土的损伤本构计算的应力峰值和实验结果相同,下降段的应力应变曲线基本吻合。提出的不同尺度横缝单元模型对坝体应力和横缝开度的计算误差在7%以内。
Research purposes: To study the damage of multi-scale transverse joint elements and dam body of concrete arch dam. Innovative Points: The calculation of the arch opening degree and the dam damage under the condition of static and dynamic loads when the arch sections of the arch dam section adopt different subdivision forms (ie multi-scale subdivision forms). Research methods: Firstly, the coupling of large-scale interface elements and dam-free degrees of small-scale unit elements is established. Then, the transverse joint element models of large-scale interface units and large-scale unit joints are established, and the damage constitutive calculation of the dam body is studied. Important conclusion: Through comparative calculation, it is found that the stress peak calculated by the damage constitutive equation of concrete is the same as the experimental result, and the stress-strain curve of the descending section basically agrees. The calculated error of the stress and cross-joint opening of the transverse joint model with different scales is within 7%.