大跨度悬挑结构卸载技术研究与施工过程力学分析

发布时间：2018-03-04 09:21

本文选题：施工力学　切入点：大跨度悬挑钢结构　出处：《武汉理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着科学技术的飞速发展及人们对物质和文化生活要求的不断提高,人们对生活中的各类建筑提出了更新、更高的要求。建筑结构的高度、跨度不断增加,结构型式日益更新,各类工程建设规模不断扩大,结构在施工过程中的力学与技术问题也愈来愈受到重视。大型复杂结构的施工是一个结构从无到有的成长过程,也是一个结构体系及其力学性态随施工进程非线性变化的复杂过程。与传统的假定结构一次成型不同,不同的施工方法、施工顺序对复杂结构的建造过程及最终成型的竣工状态都有很大的影响,因此对复杂结构进行施工过程模拟分析及力学性能研究是十分必要的。本文以深圳证券交易所营运中心抬升裙楼钢结构工程为研究背景,采用施工力学分析方法研究了悬挑钢结构裙楼胎架卸载关键技术及塔楼的力学性态,为施工方案的优选提供了理论依据,对今后类似工程的设计和施工提供了参考。本文主要工作如下： 1、总结归纳了施工过程力学分析的理论基础和分析方法,并根据工程实际施工过程,建立了基于施工过程模拟分析的有限元模型； 2、采用本文提出的胎架卸载模拟方法对抬升裙楼支撑胎架的卸载过程进行了数值模拟,对比分析了两种不同卸载方案,为实际方案的优选提供了理论依据； 3、对悬挑钢结构裙楼卸载过程中不同卸载阶段胎架应力及支撑点位移变化情况进行了施工监测,并将施工监测数据与卸载过程数值模拟计算结果进行了对比分析,验证了数值模拟的正确性； 4、考虑了该结构实际施工过程、混凝土材料时变性等影响因素,采用施工力学分析方法对塔楼钢框住-钢筋混凝土混合结构体系施工过程中竖向变形进行了计算分析,并与传统设计方法进行了对比,提出了复杂结构施工过程力学分析的必要性。最后,在总结全文工作的基础上,对进一步研究提出了建议和展望。
[Abstract]:With the rapid development of science and technology and the continuous improvement of people's requirements for material and cultural life, people have put forward new and higher requirements for all kinds of buildings in life. The construction of large and complex structures is a growing process from scratch to existence, and the mechanical and technical problems of the structures in the construction process are paid more and more attention to. It is also a complex process in which the structural system and its mechanical behavior change with the construction process. The construction sequence has a great influence on the construction process and the final completion state of the complex structure, so it is necessary to simulate the construction process and study the mechanical properties of the complex structure. Based on the steel structure engineering of the lifting skirt building of Shenzhen Stock Exchange, the key technology and mechanical behavior of the tower are studied by using the method of construction mechanics analysis. It provides a theoretical basis for the optimal selection of construction schemes, and provides a reference for the design and construction of similar projects in the future. The main work of this paper is as follows:. 1. The theoretical basis and analysis method of construction process mechanics analysis are summarized, and the finite element model based on construction process simulation analysis is established according to the actual construction process; 2. The unloading process of the supporting tire frame of the uplift skirt building is simulated numerically by using the method proposed in this paper, and two different unloading schemes are compared and analyzed, which provides a theoretical basis for the optimal selection of the practical scheme. 3. The stress of the tire frame and the displacement change of the supporting point in the different unloading stages of the overhanging steel structure skirt building are monitored, and the construction monitoring data and the numerical simulation results of the unloading process are compared and analyzed. The correctness of the numerical simulation is verified. 4. Considering the actual construction process of the structure and the time variation of concrete material, the vertical deformation of steel frame reinforced concrete mixed structure system of tower is calculated and analyzed by using the method of construction mechanics analysis. Compared with the traditional design method, the necessity of mechanical analysis of complex structure construction process is put forward. Finally, on the basis of summing up the whole paper, some suggestions and prospects for further research are put forward.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU391;TU745.2

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