A new theoretical model to evaluate the moment-rotation (M-) elationship for stiffened and extended steel beam-column end-plate connections has been derived in this paper. Based on a specific definition of the end-plate connection rotation, the end-plate connection is decomposed into several components, including the panel zone, bolt, end-plate and column flange. The complete loading-deformation process of each component is then analysed. Finally the loading–deformation process for the whole connection is obtained by superimposing the behaviour of each component. In addition, 5 joint tests have been conducted to verify the proposed analytical model. By comparing it with the test results, it has been concluded that this analytical model can evaluate the rotational behaviour of end-plate connections, as well as the moment-rotation (M-) curve and the initial rotational stiffness accurately. Furthermore, it can analyse every contribution to the joint's rotational deformation, such as the shear deformation of the panel zone, the bolt extension, the bending deformation of the end-plate and column flange, etc. This analytical model also provides moment-shear rotation (M-s) and moment-gap rotation (M-ep) curves, which establish a reliable foundation for analysing the detailed rotational behaviour of end-plate connections.

介绍了工程上通常采用的端板连接形式，并采用有限元模型对连接节点的变形特征进行了分析，研究了节点刚度变化对刚架设计的影响，并结合工程实际提出了设计建议。

在不改变招标文件要求的前提条件下，对2008年北京奥运会主体育场的主体钢结构方案进行了优化设计，通过对结构在不同荷载条件下的优化分析和设计，综合考虑了材料供应和施工的技术要求，提出了可供参考的设计建议。

2008北京奥运会及2010上海世博会为我国大空间钢结构建筑提供了良好的发展机遇，然而此类结构形式的建筑防火设计与防火保护问题也随之凸现出来。结合大空间钢结构特点，对防火性能化设计方法和防火滁料选用进行了分析，简要总结了国内外超薄型防火滁料的发展和研究现状；对国内市场上常用的几种超薄型防火滁料进行了经济性能指标的对比。

结合门式刚架轻型房屋钢结构中普遍应用的端板连接方式，本文对梁柱节点和梁拼接节点进行了试验和有限元分析，对外伸式端板连接的承载力和转动刚度特性进行了研究，讨论了我国现行规范关于外伸式端板连接的设计方法中存在的问题，同时给出了改进建议，特别是提出了在建立钢结构节点刚度分类标准方面应该注意的问题。根据比较分析的结果，本文还提出了一种新的外伸式端板连接螺栓拉力分布模型及相应的设计方法，试验证明，该方法在保证安全可靠的前提下，能够更好地符合螺栓端板连接的实际受力状态。发挥螺栓和端板的承载能力。