装配式钢结构住宅节点破坏研究

基于我国节能减排、绿色环保上提出将钢结构住宅趋于产业化发展,从根本上改变传统的设计、生产、施工等理念,实现装配式钢结构住宅满足当前时代发展的要求。文章从节点分类、节点破坏机理等方面进行介绍,最后对节点研究现状进行总结,并对今后装配式住宅节点的研究进行展望。

Strength calculation methodology for internally ring- stiffened DT- joints

In order to obtain the strength design equations for internally ring-stiffened circular hollowsection tubular DT（ double tee）-joints subjected to brace axial compression or tension, theoretical and numerical studies on 800 stiffened joints were conducted. Based on the failure mechanism of the stiffened joints, four theoretical models and corresponding equations for predicting the strength of the stiffeners are proposed. Combined with existing unstiffened DT-joint design equations, a design equation for the stiffened joints is proposed. The finite element analysis shows that the failure of the stiffened joints under brace axial loads can be characterized by plastic hinges forming in the stiffener and chord wall yielding in the vicinity of the brace-chord intersection. The reliability of the proposed stiffener strength equations is demonstrated by a reliability analysis. Good agreement is achieved between the stiffened joint strength calculated from the proposed joint strength equation and that obtained from finite element analysis.

组合结构的设计方法与材料分项系数

对我国现行规范中承载能力极限状态设计表达式中的材料分项系数的取值进行了分析计算与探讨。对影响和确定材料分项系数的几个重要因素进行了分析探索。对基于概率的计算方法和综合考虑旧版规范的衔接问题进行了探索。另外由于目前组合结构规范的材料分项系数是按钢与混凝土分别取用的,钢管混凝土统一理论提出组合材料分项系数的概念,通过可靠度分析,计算把钢管混凝土作为一种统一的材料分项系数。为组合结构材料分项系数的取用提供了另外一种方法。另外在学习其他小组资料的基础上简单介绍了组合结构的节点破坏机理及变形性能。