考虑二阶效应的半刚接钢框架内力分析-结构工程专业毕业论文.docxVIP

青岛理工大学工学硕士学位论文摘要 青岛理工大学工学硕士学位论文 摘要 在钢框架的传统分析中，一般将框架的梁柱连接假设成理想铰接或完全刚 接。前者意昧着梁柱之间不能传递弯矩，后者假定框架受载变形后，梁柱间的夹 角保持不变。对连接性能的这种理想化假设简化了钢框架的分析和设计过程，却 不能反映结构工作的实际情况，计算结果误差很大，有时甚至会得到错误的结论。 本文的目的就是为半刚性连接钢框架的设计提供一种既符合工程实际又简 便易行的计算方法，同时也将促进半刚性连接钢框架设计技术的发展，为提高结 构安全性能、节省工程成本发挥应有的作用。本文认为在目前计算机发展水平铰 高的情况下，应对钢结构连接的实际工作性能做出评估，使钢结构的设计水平与 实际相符。因此分析了半刚接有侧移钢框架的二阶效应，推导了杆件几何非线性 的单元刚度矩阵，建立了考虑节点半刚性和几何非线性影响的计算模型，用解析 方法推导出单元刚度矩阵并进行适当简化，求解杆件的内力和位移，可以获得满 足工程精度要求的计算结果，计算分析表明；在相同荷载作用下，有侧移半刚接 钢框架水平位移比刚接框架大。半刚性节点连接的柔性增大了结构构件的P—A效 应，对半刚性连接钢框架的工作性能有较明显的影响。因此，钢框架设计要充分 考虑不同类型节点半刚性特性和二阶效应的影响因素。 关键词半刚性连接；钢框架；二阶效应；几何非线性 青岛理工大学工学硕士学位论文ABSTRACT 青岛理工大学工学硕士学位论文 ABSTRACT In conventional steel flame analysis，the behavior of beam-to—column connections is treated either pinned rigid joints entirely,Pinned joints means moment could he transferred from beam to column，so rotations of beams and columns independent each other；And，rigid joints means included angle between beam and column holds the line，from unchanged frame without loads t0 transfigured frame with loads．The analysis of steel flames adopting the assumption simplify the procedure of analysis and design，but cannot precisely reflect structural practical circumstance and the ofcalculating results large． even，get incorrect conclusions． The purpose of the paper is to give calculating method that accords practical engineering and easily put into effect．Worthwhile it is going to promote the development of serei—rigid jointed steel frame in design and heighten structural stability．k this paper,we consider the precise analysis ofconnections could be gained by the concept of semi·rigid，due to the development of computer．The analysis method of second-order effect of semi-rigid sway frame is adopted．The element stiffness matrixes considering in geometric nonlinear and the elastic computational model considering in semi—rigid connection presented．The stiffness matrixes derived from the analytical solutions 8I℃expressed in series expansion and then reduced by some simpli