码头设计中桩基有效计算长度分析

有效计算长度是高桩码头桩基压屈验算的控制性参数。国内外规范提供了其理想约束下的计算方法,但不能完全反映顶部实际约束,也未明确整体分析时顶部约束类型。介绍利用有限元屈曲临界荷载确定桩基有效计算长度的方法,该方法反映实际约束较为精确,并提出码头桩基局部分析和整体分析的设计理念,得出相应规律。结果表明,局部桩基分析时,端部排架1~3顶部可认为铰接,其他排架顶部可认为固接;码头结构整体分析时,桩基顶部约束为平滑约束;码头结构整体分析时,排架≥2轴时桩基顶部可认为平滑约束;单排桩≥2根时顶部横向可认为平滑约束。实际码头工程中桩基布置、斜率等变化因素较多,可利用本文方法进行分析。

Study on the Structural Performance of Steel Plate Shear Wall with Slits on Both Sides

This paper presents a new type of two sides slotted steel plate shear wall, and carries on the analysis to the finite element elastic buckling, respectively discusses the critical buckling load and the buckling mode. For the steel plate shear wall without stiffening ribs on both sides, the paper given the buckling coefficient formula, and give design proposal and reference value of steel plate shear wall with stiffened on both sides.