外荷载对高桩码头结构数值模拟及可靠度分析

发布时间：2018-04-30 07:21

本文选题：稳定性 + 高桩码头　；参考：《浙江海洋大学》2017年硕士论文

【摘要】：随着国际贸易往来越发频繁,海洋经济得到迅速发展,港口已成为不可或缺的角色,码头更是其中重要的交通枢纽。当码头被过度使用同时又无法及时维修时,将导致码头出现不同程度的损伤,故分析码头结构稳定性对其正常运营具有重大意义。本文对高桩码头的破坏形式和损害原因进行详细阐述,根据码头为钢筋混凝土结构,故通过对钢筋混凝土结构的检测,研究码头变形及失稳,分析钢筋混凝土破坏的主要因素,研究其破坏机理,并从混凝土碳化、钢筋锈蚀等分析码头结构的耐久性和稳定性。通过有限元软件ABAQUS分别模拟船舶撞击力、门机荷载、自重荷载和门机荷载、自重荷载两种方式对码头结构的稳定性,根据模拟结果对比分析两者间的差异。同时,分析码头可靠度,对有限元软件模拟的码头稳定性与经验公式计算可靠度结果进行比较,得出如下结论:(1)从第四章可知,码头结构在船舶撞击力作用下,结构应力与位移会明显增大,码头结构更容易失稳,使码头处于危险状态。(2)通过经验公式计算外力作用下码头结构可靠度,得出可靠度与船舶撞击力成反比,船舶撞击力越大可靠度越小,而可靠度与码头稳定性呈正向变化,可靠度越大码头越稳定。(3)采用有限元模型模拟码头结构受力,其稳定性与计算得到的结果一致,说明利用有限元方法预测码头结构稳定性可取。总之,本文通过分析高桩码头结构的损害原因,采用有限元和经验公式计算两种方法预测码头结构稳定性和结构耐久性,为码头正常运营奠定了基础。
[Abstract]:With the more frequent international trade and the rapid development of marine economy, port has become an indispensable role, wharf is an important transportation hub. When the wharf is overused and can not be repaired in time, it will lead to different degrees of damage to the wharf, so it is of great significance to analyze the stability of the wharf structure for its normal operation. In this paper, the failure form and damage reason of high pile wharf are expounded in detail. According to the reinforced concrete structure of wharf, the deformation and instability of wharf are studied through the detection of reinforced concrete structure, and the main factors of failure of reinforced concrete are analyzed. The failure mechanism is studied, and the durability and stability of wharf structure are analyzed from carbonization of concrete and corrosion of steel bar. The stability of wharf structure is simulated by finite element software ABAQUS, which includes ship impact force, portal crane load, deadweight load and gantry load. The difference between them is analyzed according to the simulation results. At the same time, the reliability of wharf is analyzed, and the stability of wharf simulated by finite element software is compared with the result of calculating reliability by empirical formula. The conclusion is as follows: 1) from Chapter 4, we can know that the structure of wharf is under the action of ship impact force. The stress and displacement of the structure will obviously increase, and the structure of the wharf will be more vulnerable to instability, which makes the wharf in a dangerous state. (2) the reliability of the wharf structure under the action of external force is calculated by empirical formula, and the reliability is found to be inversely proportional to the impact force of the ship. The greater the impact force, the smaller the reliability, and the positive change between the reliability and the wharf stability, and the greater the reliability, the more stable the wharf is.) the finite element model is used to simulate the stress on the structure of the wharf. The stability is consistent with the calculated results. It is suggested that the finite element method can be used to predict the stability of wharf structure. In a word, by analyzing the damage reasons of the high pile wharf structure, the finite element method and the empirical formula are used to predict the stability and durability of the wharf structure, which lays a foundation for the normal operation of the wharf.
【学位授予单位】：浙江海洋大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U656.113

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