摘要
高桩码头是码头的三大结构形式之一,在我国应用相当广泛。随着码头使用
要求和自然条件的变化,码头结构较以往有较大的变化,横梁节点处的桩数相应
增多,节点处桩帽的尺寸逐渐变大,纵梁和横梁搁置的宽度也逐渐加大。因而对
轨道梁或横梁而言,就遇到了宽支座时梁内力如何计算的新问题。
高桩码头设计与施工规范(JTJ267-98) 中把纵梁和横梁简化为弹性支承连
续梁来进行计算,不能考虑宽支座的影响。随着支座宽度及刚度的加大,梁的内
力分布与规范计算结果存在较大差异,给工程设计带来困难,有必要对其计算方
法进行专门的研究。
为了对高桩码头宽支座结构中梁的内力分布做出正确的认识,并为以后的设
计及规范修订提供科学的依据,本文结合“宽支座梁模型试验研究”课题,通过
平面计算方法、Ansys有限元模拟和模型试验三个方面对这种结构进行了较深入
的研究。通过分析表明:考虑桩帽处节点域弹性和宽支座梁的Ansys有限元计算
结果与试验结果较为吻合,对于大桩帽码头结构的宽支座梁问题Ansys有限元及
考虑桩帽处节点域弹性的计算结果是值得借鉴的。最后采用Ansys建模分析和弹
性支承连续梁的方法对工程实例进行了分析,得出了一些有益结论,可供类似工
程及规范修订参考。
The standingpile wharf is one of the three major structure forms of the quay, it has been applied quite extensive in our country. With the changes of the use demand and natural conditions of the quay, the structure of the quay had happened greater changes relative to the past. At the same time, the count of pile in the nodal place of the crossbeam is increasing correspondingly, the size of pile cap become heavy gradually in nodal place, the bearing width in longeron and crossbeam is strengthened gradually too. Therefore for crane grider and crossbeam, have met new problem that how to calculate internal force of the beam while meeting the wide bearing.The design and construction norm of standingpile wharf (JTJ267-98) calculate longeron and crossbeam by continuous beam with the elastic support. But it can't consider the influence of the wide bearing. With the increase of the width and the rigidity of bearing, the actual internal force of beam and standardize result of calculation have heavy difference, bring to engineering design difficult, necessary to go on special research about his computing technology.In order to draw a correct conclusion about internal force distributing of crane grider and crossbeam in the wide bearing structure, and offer the scientific basis for design for the future and the revision of norm. At the foundation of combining "the model experiment study of beam with wide bearing " subject, this paper has carry on deeper research to this kind of structure through the level method、 Ansys finite element simulation and model test. Find through the analysis of this thesis: The result of considering pile cap with elastic joint panels、 the result of calculation of Ansys finite element about wide bearing and the result of the test are identical. To the wide bearing structure, The computing technology of the finite element of Ansys and considering pile cap with elastic joint panels is desirable. Finally it has analyzed the project instance by the method of Ansys finite element and continuous beam with the elastic support, besides, have drawn some useful conclusions that can offer the reference for similar project and the revision of norm.
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