李永梅  孙国富
（北京工业大学建筑工程学院  100022）

[提要]  在桩-土-上部结构动力相互作用中，二阶效应及节点板域的剪切变形对于高层钢框架结构的地震反应内力、位移等均有不可忽视的影响。研制开发的桩-土-平面杆系结构动力相互作用分析程序DIPSFSA不仅可直接求解考虑共同工作后钢框架结构各杆件的内力和位移，而且还可以考虑节点剪切变形及轴力引起的二阶效应，更准确地模拟结构的实际受力与变形特征，便于Ⅲ，Ⅳ类场地土上钢框架的实际设计与应用。
[关键词]  桩-土-上部结构  动力相互作用  节点剪切变形  二阶效应  分析程序

During the dynamic interaction of pile-soil-superstructure, it can not be neglected for the influences of seismic response upon the internal force and displacement of high-rise steel frame structure due to both second-order effect and joint shear deformation. Using the program DIPSFSA, the internal forces and displacement of members can be immediately solved, with considering not only interaction but also second-order effect and joint shear deformation, by which real characteristic of deformation subject of forces and quality of geometry for a structure can be more accurately simulated. Therefore, it is practical and convenient for the design of the buildings situated on the皿,Ⅳsite conditions.
Keywords:  pile-soil-superstructure; dynamics interaction; joint shear deformation; second-order effect; program