【作者】 景明勇；

【导师】 王元清； 边振义；

【作者基本信息】 清华大学 ， 建筑与土木工程， 2006， 硕士

【摘要】 钢管结构是指钢结构的全部或部分结构构件采用空心钢管的结构。近年来,随着我国钢结构建筑行业的不断发展;以及钢材轧制、冷热成型及焊接技术的发展,使钢管结构从平面结构进一步发展到空间结构中。由于钢管的自身截面特性良好,承载性能高,造型美观,外型简洁、流畅,节点形式简单,施工速度快,经济效果好等特点;使得钢管结构在建筑结构,尤其是大跨度空间结构中得到广泛的应用。本文结合保定长城体育馆这一实际工程,对大跨度空间钢管结构的设计计算、节点承载性能、制作和安装技术等方面进行了研究。研究内容主要包括:(1)大跨度空间钢管结构的设计和静力、动力分析。采用大型通用有限元计算软件ANSYS,对主体结构进行了建模和计算;对钢管结构的强度和稳定性进行了计算。并对结构进行了模态分析和地震反应谱分析。(2)大跨度空间钢管结构的节点承载力分析和设计。根据规范公式对TT型节点进行了计算,并对TT型和TT型加强节点的承载力采用大型通用有限元软件ANSYS进行计算和分析,验证了节点加强形式的有效性。介绍了梁柱连接节点和柱脚节点的形式并对梁柱连接节点和柱脚连接节点进行了设计计算。(3)大跨度空间钢管结构的制作技术与焊接质量控制。首先对钢管结构的起拱采用大型通用有限元计算软件ANSYS进行了计算分析。其次对钢管构件的下料、热弯、组装、矫正、现场拼装等工艺过程进行了论述。并对钢管结构的焊接质量控制和焊接变形控制提出了切实可行的措施。(4)大跨度空间钢管结构安装技术分析。根据工程的特点制定了相应的施工方案,提出了结构安装时主要的技术要求,对钢管结构的吊装进行了计算分析,并对钢管结构安装时设置的支撑胎架进行了计算分析,对梁柱连接节点和柱脚连接节点的现场焊接质量的保证提出了相应的要求。本课题结合实际工程从结构的设计计算、节点分析到结构的制作和安装进行了探讨,为今后类似的大跨度钢管结构的设计和施工提供了参考。本文属于北京市自然科学基金资助项目(项目编号:8053021)更多还原

【Abstract】 Steel tubular structures are kinds of steel structure which use hollow tube as their structural member. With the continuous development of steel industry in China,and application of several technologies such as rolling,cold molding, hot molding and welding,the use of steel tubular structures has been broadened from simple plane structures to spatial structures. Steel tubular structures are widely used in modern structures, especially in the large-span spatial structures , for its advantages—fine section properties , high load-bearing capacity, grand,brief and fluent configuration, simple assembly and fabrication, fast construction, low cost,and so forth. This paper does research on serval main aspects of large-span spatial steel tubular structures: design, carrying capacity of the joint ,fabrication and installation,,based on the practical structure-Baoding Great Wall gymnasium. The main research includes:(1)The designs,static and dynamical analysis of the large-span spatial steel tubular structure. The finite element modeling and analysis of main structure are carried out by ANSYS. The carrying capacity and stability of the structure was checked and the model analysis and seismic response spectrum analysis are also carried out.(2)The calculation and design of the steel tubular joints.After the calculation based on the corresponding code, the carrying capacity of the TT-shaped spatial steel tubular joint and the strengthening type of this connection is figured out by FEA. The validity of strengthening type of TT-shaped spatial steel tubular joint is confirmed. Moreover, the common beam-to-column connection and the column base connection are analyzed in order to get a full aspect of such connection.(3)Fabrication technique and quality control of steel tubular spatial structure. Firstly, the analysis and calculation of the arch camber have been done using FEA software--ANSYS. Then this paper discusses several aspects of tubular structure fabricating technical process, including preparation of the members, curve confection of the chords, sectional assembly of the entire structure. The effective measures of the welding of the intersection joints as well as the quality control of the welding process are put forward.(4)Installation technology of the large-span steel tubular structures. Based on the characteristics of the practical structure, the construction scheme is decided, and the technical requirements are bring forward. Then, the lifting of the structure, as well as the falsework which is set while installing are calculated. To ensure the welding quality of the column-beam connection and the column base connection, requirements are suggested.This paper grounded on the practical project, discussed the practical structure from design and joint analysis to fabrication and installation, and offers references to the similar long-span steel tubular structures.This dissertation is supported by Natural Science Foundation of Bei Jing (No.8053021).更多还原