Calculation method of equivalent modulus of elasticity for foundation of airport pavement
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摘要: 应用弹性层状体系理论与弯沉等效原则, 研究了道面结构参数、飞机荷载作用半径及主起落架构型对基层顶面当量回弹模量的影响。通过分析126种典型道面结构, 建立了机场道面基层顶面当量回弹模量的回归公式, 并根据弹性层状体系理论的当量回弹模量反算解验证了回归公式的准确性。分析结果表明: 考虑飞机荷载作用半径和主起落架构型修正系数, 荷载作用半径为10~40 cm时, 飞机荷载作用于机场典型道面结构的基层顶面当量回弹模量计算误差均控制在4%以内, 因此, 当量回弹模量换算方法具有更好的外延性, 简便实用, 计算结果准确。Abstract: Based on the elastic multi-layer theory and the principles of displacement equivalence, the influence of pavement structure parameters, aircraft load radius and main canding gear types on the equivalent modulus of elasticity of foundation(EMEF) was studied.On the basis of 126 kinds of representative pavement structures, the EMEF regression formula was established, and the accuracy of regression formula was verified by using the back calculation solution of equivalent modulus according to the elastic multi-layer theory.Analysis result indicates that when the aircraft load radius and mail canding gear types are considered, aircraft load radius ranges from 10 cm to 40 cm, and the calculation errors of the EMEFs are less than 4%.So the formula is extensional, simple and practical, the calculation result is accurate.
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表 5 双轴双轮飞机荷载作用下kxy的统计结果
Table 5. Statistical result of kxy under dual-wheel-dual-axes plane load
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表 6 复杂起落架飞机荷载作用下kxy的统计结果
Table 6. Statistical result of kxy under plane load with complex canding gear
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