水平力在高桩码头排架中的分配研究

发布时间：2018-03-25 13:53

  本文选题：高桩码头　切入点：分配系数　出处：《大连理工大学》2014年硕士论文

【摘要】：高桩码头是一种应用广泛的码头结构型式。在高桩码头横向排架的受力计算中,船舶荷载等水平集中力可能会是结构设计的控制荷载,其在排架中的分配情况对高桩码头在使用阶段的稳定性和安全性具有至关重要的影响。研究水平力在高桩码头排架中的分配,可以为结构设计和规范修订提供参考。 本文首先研究了码头分段跨数和排架间距、码头宽度、桩的布置等对水平集中力的横向分力在排架中的分配的影响。随着码头分段跨数的增多和排架间距的增大,用规范计算得到的分配系数的误差也越来越大；当码头宽度较小时,规范计算得到的最不利分配系数偏小,可能引起安全隐患；改变桩的布置,由有斜桩变为全直桩时,规范计算得到的最不利分配系数偏大,可能会浪费材料、提高工程成本。 按照现行高桩码头规范,确定水平集中力的横向分力在码头各排架中的分配时,有两个基本假定：①码头上部结构在水平方向可简化为刚性连续梁(EI=∞)；②排架可简化为支承弹簧,对上部结构有水平约束作用。本文针对这两个基本假定,提出质疑。当码头上部结构与排架水平刚度之比小于一定数值,即码头为窄桩台时,上部结构不可再看作刚性连续梁,而应看作柔性连续梁(EI≠∞)；排架对上部结构不仅有水平约束作用,还有转动约束作用,尤其对于全直桩码头,这种转动约束作用更为明显,其对分配系数的影响不可忽略。由此,本文提出新的简化模型,推导简化计算公式,并且将求解公式编制成电子表格,设计人员只需要输入码头尺寸和材料参数,即可直接得到排架中的分配系数。此种方法简单明了,安全可靠,适于推广。
[Abstract]:High pile wharf is a kind of widely used wharf structure. In the calculation of lateral bent structure of high pile wharf, the horizontal concentrated force such as ship load may be the control load of structural design. The distribution of the horizontal force in the bent frame has a vital influence on the stability and safety of the high pile wharf in the service stage. The study on the distribution of horizontal force in the bent frame of the high pile wharf can provide a reference for the structural design and the revision of the specifications. In this paper, the influence of the number of section span and the spacing of piers, the width of wharf and the arrangement of piles on the distribution of transverse force of horizontal concentrated force in the bent frame are studied in this paper. With the increase of the number of section spans and the increase of the spacing of piers, When the width of the wharf is small, the most unfavorable distribution coefficient calculated by the code is small, which may lead to the hidden danger of safety. When the pile arrangement is changed from inclined pile to full straight pile, The most unfavorable distribution coefficient obtained by standard calculation is on the high side, which may waste materials and increase engineering cost. According to the current code for high pile wharf, when determining the distribution of horizontal concentrated force in each frame of wharf, There are two basic assumptions that the superstructure of Wharf: 1 can be simplified into a rigid continuous beam in the horizontal direction as a rigid continuous beam (EI = 鈭，

本文编号：1663414