混凝土管桩水平受力性状有限元分析

根据文克尔地基模型,假定地基土的水平抗力系数沿深度成线性变化,利用有限单元法对水平荷载下混凝土管桩的水平位移、桩身弯矩等变形特性及其影响因素进行分析。通过对桩径、桩周土水平抗力系数的分析发现：桩径对桩顶水平位移的影响较大,对桩身弯矩的影响较小;而土体水平抗力系数对水平位移和弯矩都有较大的影响。此外,对具有相同有效截面积实心桩和管桩的水平抗力性进行比较,结果表明,相同条件下,管桩的水平抗力效果较好。

The Analysis of Laterally Loaded State for Concrete Pipe Piles with the Finite Element Method

Based on Winkler ground model, the finite element method was used in the paper to analyze the deformation features, such as horizontal displacement, pile bending moment, etc. in concrete pipe piles under lateral load. In the analysis, the horizontal resistance coefficient was assumed as linearly distributed along pile length and the calculated results are accord with the test results. The results show that the pile diameter has much more effect on lateral defleetion than on pile moment, hut the horizontal resistanee coefficient has much more effect on both deflection and moment. At last, the horizontal resistanee nature of the pipe pile was compared with that of the solid pile in same effective cross sections and result shows that in same conditions, the pipe pile is of a better lateral reinforcement.