【作者】 刘希月； 王元清； 石永久； 陈宏；

【Author】 Xiyue Liu1 Yuanqing Wang1 Yongjiu Shi1 Hong Chen2(1.Key laboratory of civil engineering safety and durability of China education ministry,Department of civil engineering,Tsinghua university,Beijing 100084;2.Architectural design and research institute of Tsinghua university,Beijing,100084)

【机构】 土木工程安全与耐久教育部重点实验室,清华大学土木工程系； 清华大学建筑设计研究院；

【摘要】 高强度钢材因其轻质高强等优点已广泛应用于国内外各实际工程中,也逐渐在我国建筑工程和桥梁工程中得到应用。但相对于普通强度钢材,高强度结构钢材在工程应用中的脆性断裂问题更为严重,其脆性断裂与疲劳破坏的倾向性更大,因此有必要对高强度钢材钢结构的断裂性能进行系统的研究,以期为高强度钢材钢结构的选材及防脆断设计计算提供依据。本文简单阐述了高强度钢材的优缺点以及在国内外建筑工程和桥梁工程中的应用情况,并分析了其在实际工程应用中存在的若干问题;介绍了国内外对钢结构的构造及节点脆性断裂的相关研究,分析了钢材强度对梁柱节点脆性断裂的影响,引出对高强度钢材钢结构脆性断裂进行研究的必要性,并在总结了国内外相关研究基础上,对今后的研究方向提出了一些展望。更多还原

【Abstract】 High-strength steel has been widely used in constructions for their advantages of light weight and high strength and has began been employed in the structural constructions in China.Compared with the steel which has the normal strength,the high-strength steel becomes more liable to the brittle fracture,so deep researches for the brittle fracture of high-strength steel and their welds are needed,in order to provide evidence for the material selection and the resistance to brittle fracture design of the structure which adopt the high-strength steel.This paper has briefly described the merits and demerits of high strength steel and the employments of them in structural constructions in the domestic and abroad,as well as a number of practical engineering problems.And it has introduced the related researches which have been done for the brittle fracture of the structural details and joints of steel structure,analyzed the effect of high-strength steel on the brittle fracture of steel structure,and put forward the need for the study on the fracture toughness of the high-strength steel used in structural constructions and its connection welds and the influence factors.Furthermore,based on the current related researches,this paper has put forward some suggestions for the future researches.更多还原