桩刚度系数 K
桩刚度系数 K
桩刚度系数由下式定义：
其中： | Ep | - | 桩身材料弹性模量 [MPa] |
Es | - | 桩周土割线模量平均值 [MPa] | |
Ra | - | 桩截面面积和桩侧表面积之比 [-] |
其中： | A1 | - | 桩截面面积平均值 [m2] |
A2 | - | 桩侧表面积 [m2] |
（对于刚性桩 Ra= 1）
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