高强度结构钢研究现状及其在抗震设防区应用问题  

State-of-the-art on research of high strength structural steels and key issues of using high strength steels in seismic structures

作　　者：李国强[1] 王彦博[2] 陈素文[1] 孙飞飞[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]同济大学土木工程学院,上海200092

出　　处：《建筑结构学报》2013年第1期1-13,共13页Journal of Building Structures

基　　金：国家科技支撑计划项目(2012BAJ13B02)

摘　　要：近年来,随着钢材生产工艺的进步及一大批重点工程、标志性建筑的兴建,高强度结构钢在工程中的应用逐渐增长。高强度结构钢与普通强度钢材的力学性能存在明显差异,然而现有设计规范的制定是基于普通强度钢结构的试验与理论研究,其能否适用于高强度钢的结构设计有待进一步研究。首先介绍了高强度结构钢的经济性与其在国内外工程中应用的概况,然后总结了国内外关于高强度结构钢在材料性能、基本构件力学行为、连接与节点性能和抗震设计方面的研究成果与现状。已有的研究结果表明,随着钢材强度的提高,其伸长率下降,屈强比升高,延性变差,阻碍了高强度结构钢在抗震结构中的应用。最后对高强度结构钢在地震设防区应用所面临的问题进行讨论,提出了高强度结构钢在抗震结构中应用的两种思路,并指出未来高强结构钢应用仍需开展的研究工作。Along with the recent technology advances in material science and increasing demand on high strength steel（HSS）,high strength steel has been applied to several landmark buildings and major projects.The current design codes were established based on the experimental and theoretical studies of conventional steel.However,the stress-strain relationship of HSS is different from that of conventional steel.Therefore,more work should be done to investigate whether the members fabricated from HSS can be designed according to the existing codes or whether the codes need to be modified to include HSS.In this paper,a review of the research carried out on high strength steel structures is presented,including aspects of economic analysis,material properties,behavior of compression and flexural members,bolted and welded connections and seismic design.Previous research work show that the increasing in yield strength results in the decreasing of ductility.Thus,the application of high strength steel in seismic structures is limited due to the relatively poor ductility compared with conventional steel.The current restrictions related to the use of high strength steel in seismic structures are discussed.Finally,two design methodologies of using high strength steel in seismic zone are proposed based on current seismic design philosophy.Further research work needed to develop structural design specifications for the inclusion of high strength steel is recommended.

关 键 词：钢结构 高强钢 研究现状 抗震 应用 

分 类 号：TU391[建筑科学—结构工程]