【作者】 程彩霞；

【导师】 赵均海；

【作者基本信息】 长安大学 ， 结构工程， 2006， 硕士

【摘要】 由于钢结构体系具有自重轻，安装容易，施工周期短，抗震性能好，投资回收快，环境污染少，工程受损或报废后，钢材可再生利用等优点，钢结构在我国的应用范围越来越广，一些重工业、基础设施、大型公共建筑、桥梁、高层建筑、住宅体系等诸多方面，都有一定的市场。而梁柱节点的设计又是钢结构框架中的关键，传统的设计和分析都将节点简化为完全刚接或理想铰接，即：梁柱之间要么不能传递弯矩，梁和柱的转动保持相互独立；要么认为框架在受力变形后，梁和柱之间的夹角保持不变。这种简化大大减少了钢框架的分析和设计过程，但基于该假定的结构设计可能不安全或偏于保守的，因为在实际工程中的连接是具有半刚性特性的。对于半刚性节点的研究，国外学者已经作了一些工作，而我国在这方面的研究起步较晚，目前还没有专门的钢结构连接规范，仅仅在《钢结构设计规范》中对于梁柱的连接给出了一般规定。梁柱的连接一般假定为两种类型：刚性连接和铰接，并且在设计时只考虑弹性阶段的受力情况。为了更好地研究节点的半刚性性能，本文选取一种典型的半刚性节点—带双腹板的顶底角钢的连接节点进行弹塑性数值分析。 本文采用目前国际上比较流行的大型通用有限元软件ANSYS，对带双腹板的顶底角钢的连接节点进行三维非线性有限元分析，有限元模型中采用了较复杂的带有中间节点的10节点实体单元SOLID92、8节点实体单元SOLID45、接触单元CONTA174和TARGE170四种单元类型，充分考虑了材料非线性、几何非线性以及状态非线性的影响，得出了此种连接的弯矩-转角(M-θ)性能曲线，更多还原

【Abstract】 Since steel structures have light weight, easy installation, short construction period, better seismic behavior, effective investment, less environment pollution, and good recycle, they are popular to many fields in our country. Some buildings for heavy industry and basal establishment, great public architectures, bridges, high buildings, house systems and so on. The design for beam-to-column connections is critical to the whole steel frame. In the conventional design, the behavior of beam-to-column connections is treated as either ideal rigid or pinned joints. That means the beam-to-column connections can not transfer moment and they turn absolutely. In other hand, the angle between beam and column is changeless after bearing loads. Through this simplified method much work can be reduced, the structure based on the method will be insecurity or conservative. In the practical engineering, the beam-to-column connections are between pinned and rigid, namely semi-rigid. Some research has been done in the foreign countries. In our country the conesponding work is little. At present, there are no special steel structure codes for beam-to-column connections. The behavior of beam-to-column connections is usually treated as either rigid or pinned. During the design process, only the elastic stress is considered. In order to discuss the behavior of the semi-rigid connections, the elastic plasticity of a new joint-top and seat angle with double web angles semi-rigid connection is analyzed with numerical method.In this paper 3-D nonlinear finite precise numerical simulation experiment has been done for this kind of joints. In the analysis the element SOLID92 with ten更多还原