【作者】 董建军；

【导师】 宋昌永；

【作者基本信息】 浙江大学 ， 结构工程， 2007， 硕士

【摘要】 冷弯薄壁型钢由于壁薄、截面展开，力学性能优异，在单层工业厂房和低层钢结构别墅中有大量的应用，但在多层住宅中的运用仍是空白。本文尝试探讨冷弯薄壁型钢结构在多层钢结构住宅中的运用。在深入了解钢结构住宅结构体系和国内外发展状况的基础上，选用实例住宅，按实际住宅结构的要求进行布置，采用SAP2000软件对结构在竖向荷载和水平荷载作用下的受力性能进行整体分析，在满足规范对结构的位移和内力要求的前提下，讨论了合理的结构布置形式、支撑布置及支撑刚度；对比分析冷弯薄壁型钢密柱框架结构与纯框架、轻型楼板主次梁框架结构的性能；通过对单榀的冷弯薄壁型钢密柱框架和H型钢纯框架进行分析比较，研究密柱框架性能优越的内在原因；探讨了冷弯薄壁型钢密柱框架、H型钢纯框架、H型钢支撑框架在小高层建筑中的可行性。在结构受力性能分析的基础上，综述了已有冷弯薄壁型钢结构节点的构造处理方法，以期找到更方便有效的连接节点构造。最后，对钢结构住宅体系的围护与防护体系进行了总结，进而提出了改善围护体系性能的研究方向，探讨了一些常用楼墙板材的性能特点；介绍了钢结构的防火、防腐的重要性及防护机理、措施等。通过本文所做的计算分析，表明：在多层住宅中采用冷弯薄壁型钢结构，可以满足规范对结构位移及内力的控制要求；支撑在冷弯薄壁型钢密柱框架中作用重要，能有效提高结构的抗侧刚度；多层冷弯薄壁型钢结构的用钢量低于纯框架结构和轻型楼面主次梁框架结构；在小高层(9层以下)结构中，冷弯薄壁型钢密柱框架仍具优势，但在更高的楼层中支撑框架性能优越。更多还原

【Abstract】 Due to the good performance of the cold-formed thin-walled steel structures, they have been widely used in factory buildings and the low-rise residential houses. However, there only has a limited application in the multi-story residential buildings. The present article attempts to investigate the possibility of the application of the cold-formed thin-walled steel structures in the multi-story residential buildings.Based on the understanding of the structural systems and the development of the residential buildings with steel members, a practical example is used as a numerical model to investigate the structural performance of the residential building, with the cold-formed thin-walled members. General finite element software SAP2000 is adapted to analysis the global structural behavior of the model building, under the combination action of the vertical and horizontal forces. The analyses are focused on how to arrange the structural members, the brace members, and determine the suitable size of the bracing rigidity, as the structure is required to satisfy the Chinese design code. Further numerical analyses are employed to compare the performance of the structural models with different structural systems; the possibility of application of the frames, made of the cold-formed thin-walled members in high-rise building, is also explored.On the other hand, the article also pays a large number of attentions on the joints, load-bearing wall system, non-load bearing wall system, floor system, and fire-resistance methods. The available investigations are summarized, some beneficial suggestions are found to guide the future design.The investigation of the present article demonstrates that the cold-formed thin-walled steel members can be used to build multi-story residential buildings; the requirements suggested in the Chinese design code, such as the displacement, stress, can be satisfied without difficulty. It is very important to employ brace members in the structural system, as they can greatly increase the rigidity. Further investigation also illustrated that the cold-formed thin-walled steel members can be used in high-rise buildings.更多还原