水平荷载作用下高桩码头叉桩扭角布置研究

Laying of fork pile fastened angle at high-pile wharf with horizontal load

以湛江某高桩码头标准结构段桩基布置为例,运用有限元软件ANSYS建立空间有限元模型,考虑4种水平荷载作用控制工况,对不同叉桩扭角布置方案码头桩基内力进行计算分析,讨论水平地震荷载及船舶荷载对叉桩扭角布置的影响。计算结果表明:结构横向水平位移与桩弯矩随扭角的增大而增大,结构纵向水平位移和桩弯矩随扭角的增大而减小;在纵向水平地震荷载组合工况下,码头结构位移及桩弯矩最大;综合考虑纵横向刚度的影响,本码头结构段叉桩扭角选用20°较为合理。

Selecting a structural segment of high-pile wharf in Zhanjiang as the research data, we build a space finite element model by finite element software ANSYS. Considering four kinds of horizontal loading effects as controlled working conditions, we calculate and analyze the internal force of pier pile under different fork pile fastened angles, and discuss the influence of horizontal earthquake effect and ship load on the laying of fork pile fastened angle. The results indicate that： when the fastened angle is growing bigger, the lateral displacement and bending moment of such structure increase, but the longitudinal displacement and bending moment become smaller. The displacement and the bending moment get the maximum under the working condition of the longitudinal horizontal earthquake effect. When the effect of longitudinal and lateral controlled working conditions is considered, fork pile fastened angle 20° will be reasonable in the structural segment of such high-pile wharf.