基于ABAQUS的主桩板桩结构受力分析

发布时间：2018-08-22 13:02

【摘要】：近年来,随着我国港口事业的发展,自然条件较好的海湾和海岸已被开发,以后的港口工程建设将更多的处于各种复杂的条件下,或浪大流急,或海滩平缓,或地基土质松软。主桩板桩码头结构是在传统的普通板桩结构下改良而成的结构型式,能充分发挥主桩受力,具有抗弯能力强、适应地基变化、耐久力强的特点。但是,国内对主桩板桩码头结构尚未开展过深入的研究,还没有现行的设计规范与计算方法。由此,本文应用国际通用的大型非线性有限元分析软件ABAQUS,先是对刚性墙和柔性墙结构进行了数值建模,并且与相应的理论进行了验证。对不同桩间作用类型的板桩码头结构进行了模拟分析,并着重分析了铰接模型和刚接模型的不同。分别对“工”字型主桩断面和“T”型主桩断面的主桩板桩结构进行建模分析,比较两者的异同,分析主桩板桩结构的受力特征。对影响主桩板桩结构受力的因素进行分析。研究发现,桩间作用铰接设置时,板桩墙后应力和位移变化的比较平缓;而刚接设置时,板桩墙后应力和位移变化则比较复杂,先是缓慢增长,然后会有一个急剧上升的过程。当分析主桩板桩结构的受力特征时,“工”字型断面和“T”型断面受力特征是不一样的,整体来看都是腹板处高于翼缘处。研究表明,主桩的排布间距和埋深对结构的影响有一定的上限值和下限值,在这个范围类,主桩间距和埋深对结构的受力有一定的规律。锚定位置高度对结构位移影响较大,对于结构的受力主要集中在锚定位置附近。经分析,本文得到的相关结论可作为主桩板桩码头结构实际工程设计的参考。
[Abstract]:In recent years, with the development of port industry in our country, the bay and coast with better natural conditions have been developed, and the future port engineering construction will be more in various complicated conditions, such as rapid waves, gentle beaches, or soft foundation. The structure of the main pile wharf is improved under the traditional ordinary plate pile structure. It can give full play to the force of the main pile and has the characteristics of strong flexural ability, adapting to the change of the foundation and strong durability. However, the structure of the main pile-plate pile wharf has not been deeply studied in China, and there is no current design code and calculation method. Therefore, in this paper, the large nonlinear finite element analysis software Abaqus is used to model the rigid and flexible wall structures, and the corresponding theory is verified. The structure of plate pile wharf with different types of interaction between piles is simulated and analyzed, and the differences between hinged and rigid joint models are emphatically analyzed. The main pile structure of "I" type main pile section and "T" type main pile section are modeled and analyzed, the similarities and differences between them are compared, and the mechanical characteristics of main pile plate pile structure are analyzed. The factors influencing the stress of the main pile-plate pile structure are analyzed. It is found that the stress and displacement change behind the plate pile wall is relatively gentle when the interaction between piles is hinged, while the change of the stress and displacement behind the plate pile wall is more complicated when the pile is rigidly connected, which increases slowly and then rises sharply. When the stress characteristics of the main pile-plate pile structure are analyzed, the stress characteristics of the "I" section and the "T" section are different, and the web is higher than the flange as a whole. The results show that the spacing and depth of the main pile have a certain upper limit value and lower limit value on the structure. In this category, the spacing of the main pile and the depth of the buried pile have a certain law on the force of the structure. The height of anchoring position has a great influence on the displacement of the structure, and the stress on the structure is mainly near the anchor position. Through analysis, the relevant conclusions obtained in this paper can be used as a reference for the practical engineering design of the main pile-plate pile wharf structure.
【学位授予单位】：大连海洋大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U656.112

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