基于半刚性理论的门式刚架体系及性能研究

【作者】 崔文杰；

【导师】 吴乃森；

【作者基本信息】 西北工业大学 ， 结构工程， 2006， 硕士

【摘要】 《中国建筑钢结构产业“十五”计划和2015年发展规划纲要(草案)》的出台为我国轻钢结构的发展提供了新的契机。然而,目前轻钢结构在我国的发展还处于初级阶段,对于结构体系的研究还不够充分。因此,对轻钢结构体系及其性能进行广泛而深入的研究具有重要的现实意义和实用价值。 本文在广泛查阅了国内外门式刚架资料的基础上建立门式刚架结构的力学计算模型,在建模和分析时主要从门式刚架结构体系的优化、节点半刚性以及加工安装引起的初始应力三个方面对门式刚架结构的耗钢量和力学性能进行研究。利用ANSYS APDL语言编程对大量模型进行建模计算。得出各种情况下结构的单位耗钢量、节点半刚性对结构力学性能的影响以及安装误差引起的初始内力对结构内力的影响。 当前对门式刚架省钢方法的研究主要集中在针对截面内力的情况,采用楔形门式刚架来达到省钢的目的。本文从另外的角度,把节点半刚性理论应用到门式刚架结构中,通过改善内力情况达到省钢目的。 通过大量的计算、分析和回归,得到比较实用、具有指导意义的结论。更多还原

【Abstract】 The issuance of the "Tenth-Five-Year Program" of the Steel Structure Industry of China and the Compendium of the Developing Layout before 2015(draft) supplies a great of opportunities for developing light steel structure in China . Nevertheless, nowadays the development of steel structure is still in elementary stage in China , and the present research in this field is not enough Thereby ,it is important as well as meaningful to make some deep researches for system and capability of the light steel structure.In this paper ,the mechanical calculating model for portal steel structure has been founded after referring volumes information about portal steel structure from domestic and abroad ,and the main attentions are focused on structural optimization, semi-rigid connection, and secondary stress. The modeling and analysis have been carried out in ANSYS APDL and the impact of steel dosage and semi-rigid connection on structure mechanical capability and the secondary stress on internal stress.At present ,the research about how to economize steel dosage is focused on using various sections in the same beam or column, and the semi-rigid theory has been adopted to economizing the amount of steel in this paper.In this paper , through a great deal of calculating .analysis, and regressing ,we can get a more practical and meaningful guidance for the practical project.更多还原