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工程力学  2014 

不同桩头约束下水平受荷单桩简化计算方法

DOI: 10.6052/j.issn.1000-4750.2013.04.0337, PP. 63-69

Keywords: 水平受荷单桩,非线性响应,桩头转动约束,简化方法,手算

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Abstract:

桩头转动约束对水平加载单桩的响应有显著影响。转动刚度K和桩头约束度λ是常用的桩头转动约束表征量。该文采用p-y曲线法分析了砂土中水平受荷竖直弹性长桩响应随K和λ的变化规律,提出了桩头位移和土面下桩身最大弯矩随λ变化的经验公式。基于上述经验公式和特征荷载的归一化表达式,提出了给定K或λ情况下计算桩头位、桩头弯矩、土面下桩身最大弯矩及其埋深位置的整套简化计算方法。该简化方法实现了考虑桩头转动约束单桩非线性响应的手工计算。该方法与p-y曲线法对比验证了该方法的准确性。

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