高性能结构钢材应用技术研究与进展

石永久; 余香林; 班慧勇

doi:10.13206/j.gjgS24071720

高性能结构钢材应用技术研究与进展

doi: 10.13206/j.gjgS24071720

清华大学土木工程系, 北京 100084

基金项目:

国家自然科学基金项目(52078276)。

详细信息

作者简介:
石永久,博士,教授,主要从事钢结构和钢-混凝土组合结构研究。Email:shiyj@tsinghua.edu.cn

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出版历程
- 收稿日期: 2024-07-17
- 网络出版日期: 2024-11-06

Research and Progress on Application of High Performance Steel

Department of Civil Engineering, Tsinghua University, Beijing 100084, China

摘要

摘要: 具有高强度、高延性、高韧性、强可焊性、强耐候性、强抗火性等优越材料性能的高性能结构钢材,在建筑和桥梁钢结构中具有广阔的应用前景。高效和合理应用高性能结构钢材,可以大幅度节省钢材和防护涂装,降低制作加工和运输安装成本,减少焊接工作量和碳排放,从而降低钢结构的全生命周期运维成本。重点讨论了高强度钢材、超高强度钢材、耐火钢材、耐候钢材等高性能结构钢材的发展现状,总结了国内外现行建筑和桥梁钢结构技术标准体系中对应用高强度钢材的相关规定,并结合工程应用案例分析了690 MPa及以上超高强度钢材的优势,提出了研发超高强度钢材的结构体系、制定相应结构设计和施工技术标准的建议。
从材料层面提高钢结构抗火和耐腐蚀性能是高性能钢材优势的综合体现,还总结了在桥梁钢结构中应用耐候钢和建筑钢结构中应用耐火钢的发展趋势,创新提出了构建"耐火钢+混凝土+膨胀薄涂料"多重(SCI)抗火结构体系的钢结构防火设计新理念,为实现免防火涂装或少防火涂装的耐火钢结构体系提供了新的途径,建议了耐火钢SCI结构体系的火灾安全评价方法。
在建筑和桥梁结构体系中应用高性能钢材是钢结构行业的发展方向,是实现全生命周期绿色低碳、安全适用的高性能钢结构体系推广应用的关键举措,同时应研发配套的焊接和螺栓材料、制作安装工艺、设计和应用技术标准,助力实现高质量发展战略目标。
- 高性能钢材 /
- 高强度和超高强度结构钢材 /
- 耐火钢和耐候钢 /
- 钢结构抗火体系
Abstract: High performance structural steel with superior material properties such as high strength, high ductility, high toughness, better weldability, improved weather resistance and fire resistance, has been widely applied in building and bridge steel structures. Efficient and rational application of high-performance structural steel can significantly save steel and protective coatings, reduce production, transportation, and installation costs, decrease welding workload and carbon emissions. Further reducing the full life cycle operation and maintenance costs of steel structures. This paper focuses on the development and progress of high-performance structural steels such as high-strength steel, ultra-high strength steel, fire-resistant steel, and weathering steel. This paper reviews the relevant regulations on the application of high-strength steel in the current technical standard system of building and bridge steel structures, and analyzes the advantages of ultra-high strength steel grade of 690 MPa and above through engineering application cases.
Recommendations are proposed for the research and development of structural systems using ultra-high strength steel, and drafting relevant structural design and construction standards.The advantages of high-performance steel can be further demonstrated in improving the fire and corrosion resistance of steel structures from the material level. The development trend of using weathering steel in bridge steel structures and fire-resistant steel in building steel structures is summarized. An innovative concept of steel structure using fire-resistant steel to form a "fire-resistant Steel + Concrete + Intumescent coating" (SCI) structural systems is proposed. The steel structural system without or with less fire-resistant coating can be realized, and the fire safety evaluation method of SCI structural system is suggested.
The use of green and low-carbon high-performance steel to construct building and bridge structural systems is the new direction and advancement of the steel structure. Meanwhile the welding and bolt materials, as well as design fabricating and installation standards have been developed to promote the application of high-performance steel structure systems and contribute to the achievement of the national "dual carbon" strategic goals.
- high performance steel /
- high strength and super-high strength steel /
- fire-resistant and weathering steel /
- fire resistance of steel structure

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