土-结构动力相互作用几种计算模型的比较

Comparison of several simulating models for dynamic soil-structure interaction

针对目前在土-结构动力相互作用分析中基础常采用实体单元、结构采用梁单元,建模过程中经常遇到的基础和结构不同单元的连接问题,通过在基础表面添加刚臂连接单元的方法来模拟基础和结构的连接,并分析对比了实体单元、实体单元-刚臂-梁单元、实体单元-梁单元3种模型在考虑土-结构相互作用时的动力反应,计算结果显示:采用刚臂连接单元方法的计算结果精度与实体单元的相同,但计算效率高。

At present, in the dynamic soil-structure interaction analysis the base is modeled by solid element and the superstructure by beam, the problem of connection between different elements occurs. To solving the connection method of different elements, rigid arm beams are added between the upper beam elements and lower solid elements. Various models are established and the different results are analyzed. Some significative conclusions are drawn out： the calculation results of the model with rigid arm beam elements is similar to the model of solid elements, but more efficient in calculation.