地震波种类变化对单层柱面网壳等效模型模拟精度的影响研究

发布时间：2018-07-24 21:33

【摘要】：单层柱面网壳精细化有限元模型虽有较好的模拟精度,因为其建模复杂而且计算费时,所以难于应用到工程实际中进行模拟分析。为了平衡计算精度和计算量,需要对精细化模型进行等效简化研究。前期研究得到了1种较好的简化建模方法,在此基础上研究地震波种类变化对等效模型模拟精度的影响。共建立了1组4个单层柱面网壳模型,所有模型分为两类,即:2个精细化壳单元模型和2个等效梁单元模型。由于地震波种类不同会使模型失效的临界加速度值不同。因此,动力分析时选用接近结构失稳临界值的加速度。模拟结果显示:随着地震波种类的改变,简化模型的等效效果都较好。等效简化模型的精度受地震波种类的影响较小,可以忽略不计。
[Abstract]:Although the fine finite element model of single-layer cylindrical latticed shell has good simulation accuracy, it is difficult to be applied to engineering practice because of its complicated modeling and time-consuming calculation. In order to balance the calculation precision and computational complexity, it is necessary to study the equivalent simplification of the refined model. A better simplified modeling method was obtained in the previous study, and the influence of the variation of seismic wave type on the simulation accuracy of the equivalent model was studied. A group of four single-layer cylindrical reticulated shell models were established, all of which were divided into two categories: two refined shell element models and two equivalent beam element models. Due to the different types of seismic waves, the critical acceleration values of the model failure will be different. Therefore, the acceleration close to the critical value of structural instability is chosen for dynamic analysis. The simulation results show that with the change of seismic wave type, the equivalent effect of simplified model is better. The accuracy of the equivalent simplified model is less affected by the type of seismic wave and can be ignored.
【作者单位】：华北理工大学建筑工程学院;河北省地震工程研究中心;北京工业大学建筑工程学院;
【基金】：国家自然科学基金重大研究计划项目(90715034);国家自然科学基金(51478162) 唐山市科技计划项目(14130207a) 华北理工大学博士基金(25401199)
【分类号】：TU399

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