冷弯型钢结构研究进展

周绪红

doi:10.13206/j.gjgSE20010804

冷弯型钢结构研究进展

doi: 10.13206/j.gjgSE20010804

周绪红^1,2, ,

1. 重庆大学土木工程学院, 重庆 400045;
2. 山地城镇建设与新技术教育部重点实验室(重庆大学), 重庆 400045

详细信息

通讯作者:
周绪红,Email:zhouxuhong@126.com

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出版历程
- 收稿日期: 2019-12-26
- 修回日期: 2020-01-17

Research Progress on Cold-Formed Steel Structural Framing

Xuhong Zhou^{1,2
, ,}

1. School of Civil Engineering, Chongqing University, Chongqing 400045, China;
2. Key Laboratory of New Technology for Construction of Cities in Mountain Area(Chongqing University), Ministry of Education, Chongqing 400045, China

摘要

摘要: 冷弯型钢构件具有重量轻、强度高、易于预制和量产、安装快、可回收利用等优点。冷弯型钢结构体系主要由墙体系统、楼盖系统和屋面系统组成，已在美国、澳大利亚和新西兰等国广泛应用。而我国冷弯型钢结构设计规范尚需完善，加之"人多地少"的国情，发展多高层冷弯型钢结构体系势在必行。通过理论分析和试验研究，对冷弯型钢结构体系进行深入研究，研究方向涵盖冷弯薄壁型钢基本构件和拼合构件的受力性能、组合墙体的抗侧性能、组合楼盖的承载力、刚度和舒适度以及整体房屋的抗震性能，相关研究成果如下：1）采用半能量法深入研究了板组屈曲的相关作用问题，建立了边缘加劲板件有效宽厚比设计方法；揭示了冷弯薄壁型钢轴压柱的破坏特征和力学性能，建立了简支、固支轴压柱畸变屈曲临界荷载的统一分析方法，提出了临界荷载计算理论；修正了澳大利亚标准AS/NZS 4600∶2005和我国标准JGJ 227—2011中畸变屈曲极限承载力的计算公式。2）揭示了双肢拼合冷弯薄壁型钢轴压柱和受弯梁的破坏特征和受力机理，提出了冷弯薄壁型钢拼合截面柱和梁极限承载力的简化计算方法。3）揭示了传统冷弯薄壁型钢组合墙体和冷弯薄壁型钢—钢板剪力墙水平荷载作用下的受力机理、破坏模式和力学性能，建立了冷弯薄壁型钢组合墙体的理论分析方法。4）揭示了冷弯薄壁型钢组合楼盖在竖向荷载、水平荷载及振动激励下的受力机理、破坏模式和力学性能，提出了冷弯薄壁型钢组合楼盖的设计计算方法。5）揭示了冷弯薄壁型钢住宅房屋在地震荷载作用下的破坏特征、动力特性及地震响应，建立了低、多层冷弯薄壁型钢结构体系的有限元分析方法，提出了抗震设计计算方法和抗震构造措施。6）揭示了冷弯薄壁型钢拼合截面柱在火灾下的受力机理、破坏模式和力学性能，建立了理论分析方法、简化力学模型和设计计算理论。
研究成果已被国内相关设计规范采用，可以用于指导实际工程设计。笔者及团队后续研究工作将聚焦于冷弯薄壁型钢结构多层房屋关键技术及其应用，以推动装配式钢结构房屋在中国的应用。
- 冷弯型钢 /
- 结构构件 /
- 组合截面 /
- 剪力墙 /
- 楼盖 /
- 抗震性能 /
- 抗火性能
Abstract: Cold-formed steel (CFS) structural framing system widely used in North America and Europe is also applicable in China due to low weight, high strength, environmental friendliness, and fast fabrication. In the last three decades, numerous researches have been carried out to investigate the structural performance of CFS framing buildings. The author started to study the CFS structures in the 1980s and is one of the earliest advocators of applying CFS structures in residential buildings. This paper summarizes the research progress on CFS framing buildings, including local buckling and distortional buckling of CFS columns, compression and flexural behavior of build-up columns and beams, diaphragms, vibration performance of composite floor systems, strength and stiffness of shear walls, the seismic behavior of whole CFS structure, and the fire resistance of build-up columns. Lastly, future research for advancing the knowledge relating to structural behavior of CFS structures is suggested.
- cold-formed steel /
- structural member /
- build-up section /
- shear wall /
- floor /
- seismic performance /
- fire resistance

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