广州某超高层建筑结构施工若干关键技术研究

发布时间：2018-07-04 12:52

本文选题：超高层结构 + 施工模拟计算　；参考：《华南理工大学》2013年硕士论文

【摘要】：进入二十一世纪以后，随着国民经济日益发展，越来越多的超高层建筑不断涌现，像广州珠江新城西塔、广州电视塔、上海中心和重庆世贸中心大厦等这类典型超高层建筑则逐渐成为城市发展新的地标。建筑高度和体型不断发展的同时，对施工工艺、材料设备等也提出更高的要求，结构和设备在施工过程中的安全性将是制定施工组织计划、优化施工方案时首要关注的问题。因此，，有必要对超高层建筑结构进行施工全过程模拟分析，力求保障工程能够安全、顺利地开展。本文中以广州珠江新城B2-10项目为工程背景，对其进行施工模拟分析，得到较多有意义的结论；并针对项目中采用的M900D塔吊进行现场运行监测试验和数值模拟分析，为塔吊设计提供一些合理性建议，主要包括如下几方面内容：第一部分主要针对广州珠江新城B2-10项目进行施工模拟计算及其相关研究。首先对于核心筒超前外框架施工层数不同引起计算结果的差异，结合施工现场若干因素限制，选定广州珠江新城B2-10项目实际所采纳的施工方案。之后对采用该方案条件下结构内力和变形计算结果进行细致分析，得到较多有意义的结论。本文中还讨论了传统结构设计的一次性加载法与施工模拟方法各自的特点，以及二者计算结果的诸多区别，同时针对施工模拟计算时是否考虑施工找平措施、混凝土材料收缩徐变进行对比分析，通过相应结果评估各类效应对最终结果的影响程度。再则结合广州珠江新城B2-10项目各道伸臂桁架进行接合时间和相互作用影响分析，以桁架内力和变形结果为依据，探讨最为合理的接合时间以及各桁架间相互作用的独立性。第二部分主要针对广州珠江新城B2-10项目所采用的大型M900D塔吊现场运行监测试验和数值计算结果进行对比研究。探讨塔吊运行过程中的最不利工况和塔吊各柱受力的不均匀性，根据试验现象和监测结果提出塔吊上下支撑架应采取不同的设计方法。提出利用有限元软件准确模拟塔吊实际运行的建模方法，有限元数值计算结果与试验实测数据能够较好吻合。本文中还对塔吊运行时其附着核心筒的受力和变形进行研究，探讨塔吊作用下核心筒墙体的安全性。
[Abstract]:After entering the 21 century, with the increasing development of the national economy, more and more super high-rise buildings have been emerging, such as the West Tower of the Pearl River New City in Guangzhou, the Guangzhou TV Tower, The typical super-tall buildings such as Shanghai Center and Chongqing World Trade Center are becoming new landmarks of urban development. With the development of building height and shape, higher requirements for construction technology, materials and equipment are put forward. The safety of structure and equipment in construction process will be the most important problem in making construction organization plan and optimizing construction plan. Therefore, it is necessary to simulate and analyze the whole construction process of the super high-rise building structure in order to ensure that the project can be carried out safely and smoothly. Taking the B2-10 project of Guangzhou Pearl River New Town as the engineering background, this paper carries on the construction simulation analysis to it, obtains many meaningful conclusions, and carries on the field operation monitoring test and the numerical simulation analysis to the M900D tower crane used in the project. This paper provides some reasonable suggestions for tower crane design, including the following aspects: the first part mainly aims at the construction simulation calculation and related research of Guangzhou Pearl River New Town B2-10 project. Firstly, for the difference of calculation results caused by the construction floor number of the core tube in advance and outer frame construction, combined with the limitations of several factors in the construction site, the practical construction scheme adopted for the B2-10 project of Guangzhou Pearl River New City is selected. After that, the calculated results of internal force and deformation of the structure under the condition of this scheme are analyzed in detail, and many meaningful conclusions are obtained. This paper also discusses the characteristics of the one-off loading method and the construction simulation method in the traditional structural design, and the differences between the two calculation results. At the same time, whether to consider the construction leveling measures in the construction simulation calculation is also discussed. The contrastive analysis of shrinkage and creep of concrete materials is carried out, and the influence of various effects on the final results is evaluated by the corresponding results. Furthermore, based on the analysis of the joint time and interaction effect of each truss of Zhujiang New Town B2-10 Project, the most reasonable bonding time and the independence of the interaction among trusses are discussed based on the results of internal force and deformation of the truss. In the second part, the field operation monitoring test and numerical calculation results of large M900D tower crane used in B2-10 project of Zhujiang New Town in Guangzhou are compared and studied. This paper probes into the most unfavorable working conditions during the operation of the tower crane and the inhomogeneity of the stress on each column of the tower crane. According to the experimental phenomena and the monitoring results, different design methods should be adopted for the upper and lower supports of the tower crane. A modeling method for accurately simulating the actual operation of tower crane by using finite element software is proposed. The results of finite element numerical calculation are in good agreement with the measured data. In this paper, the force and deformation of the core tube attached to the tower crane are also studied, and the safety of the core tube wall under the action of the tower crane is discussed.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU974

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