反应位移法中弹簧系数求解方法改进研究

Improvement of Spring Constant Calculation in ResponseDisplacement Method

摘要:

采用反应位移法进行地下结构抗震计算时，关键是确定土体的弹簧系数，弹簧系数的取值直接影响计算结果。在现有的静力有限元求解弹簧系数方法的基础上，通过不同的施力方式共设计了6种静力有限元求解弹簧弹簧系数的方法，并对这6种计算方法进行对比分析计算。结果表明，整体和整体同时求解径向和切向弹簧系数这两种方法的计算结果偏于危险；单独和单独同时求解水平和垂直向弹簧系数这两种方法的计算精度最好；整体和整体同时求解水平和垂直向弹簧系数这两种方法的计算结果偏于安全。

Abstract:

When the response displacement method is adopted for the seismic calculations of underground structures，the key is to determine the soil spring constant, as spring constant values directly affect the calculation results.Based on the existing static finite element method of calculating the spring constant，six variations of this method are designed through different applications of force，and their calculation results are compared. The calculation results of the whole solution and the whole simultaneous solution of the radial and tangential spring constant methods should be dangerous，the single solution and the single simultaneous solution of the horizontal and vertical spring constant methods possess high computational precision，and the calculation results of the whole solution and the whole simultaneous solution of the horizontal and vertical spring constant methods show be safe.