论文部分内容阅读
首先结合工程中钢管混凝土柱实际受力特点,对传力构造、粘结作用、抗剪连接件这3种传力路径进行阐述,总结了国内外有关钢管混凝土柱中钢管-混凝土之间竖向荷载传递的试验与理论研究成果;探讨了这3种荷载传递路径的研究现状与不足,结合以往研究对钢管混凝土柱粘结受力状态进行分析;对美国规范(AISC)、欧洲规范(EC 4)、日本规范(AIJ)及我国规程(CECS 159:2004)的相关设计条文及构造措施进行归纳,简要分析了各国规范针对组合结构钢-混凝土竖向荷载传递的设计方法及局限性;最后,针对超高层建筑中框架-核心筒结构体系钢管混凝土巨型柱竖向荷载传递问题,提出了几种保障核心混凝土及时有效参与承担竖向荷载的节点构造措施,并结合已有的研究现状提出尚需进一步解决的问题。
First of all, combining with the actual characteristics of CFST columns in engineering, this paper expounds the three transmission paths of force transmission structure, bonding effect and shear connection, and summarizes the vertical and horizontal distributions of steel pipe-concrete in CFST The experimental and theoretical research results of load transfer are discussed. The current research status and shortcomings of these three kinds of load transfer paths are discussed. The past research is conducted to analyze the bond strength of concrete filled steel tubular columns. The AISC, EC 4 ), Japan’s Code of Conduct (AIJ) and China’s Code of Practice (CECS 159: 2004) are summarized. The design methods and limitations of vertical load transfer for composite structural steel-concrete in different countries are briefly analyzed. Finally, In order to solve the problem of vertical load transfer of frame-core-tube-to-steel tubular stiffened tubular columns in super high-rise buildings, several measures to ensure the timely and effective participation of core concrete in vertical load are proposed. According to the existing research, Further solve the problem.