摘要
为了减小构件尺寸和结构自重,超高强混凝土和高强钢材在高层建筑中的应用越来越广泛。但是,能够指导高强材料应用设计的试验数据和设计规范却很少。基于高强钢管混凝土在常温和高温下的试验得出了一些重要结论;通过一系列试验研究了高强材料的力学性能,如短柱在轴向压力下、梁受弯以及细长梁-柱在轴心和偏心压力下的结构性能。试验试件采用了屈服强度达到780MPa的高强钢材和圆柱体抗压强度达到180MPa的超高强混凝土;对试验所得结果与通过修正版欧洲规范EN 1994-1-1 Eurocode 4方法所得结果进行了对比分析。此外,还收集了2 000多组普通或者高强钢管混凝土的试验数据样本,通过分析给出了通用设计建议,可供实践参考。
Ultra-high strength concrete and high tensile steel are becoming very attractive materials for high-rise buildings because of the need to reduce member size and structural self-weight. However,limited test data and design guidelines are available to support the applications of high strength materials for building constructions. The significant findings from comprehensive experimental investigations on the behaviour of tubular columns in-filled with ultra-high strength concrete were present at ambient and elevated temperatures. A series of tests were conducted to investigate the basic mechanical properties of the high strength materials,and structural behavior of stub columns under concentric compression,beams under moment and slender beam-columns under concentric and eccentric compression. High tensile steel with yield strength up to 780 MPa and ultra-high strength concrete with compressive cylinder strength up to 180 MPa were used to construct the test specimens. The test results are compared with the predictions using a modified EN 1994-1-1 Eurocode 4 approach. In addition,more than 2000 test data samples collected from literature on concrete filled steel tubes with normal and high strength materials were also analyzed to formulate the design guide for implementation in practice.
出处
《建筑结构》
CSCD
北大核心
2015年第11期37-42,共6页
Building Structure
基金
新加坡A*STAR(SERCm Grant No.0921420045)的资金支持下完成的
关键词
组合结构
钢管混凝土
高强钢
超高强混凝土
耐火性
composite structure
concrete filled steel tube column
high tensile steel
ultra-high strength concrete
fire resistance
