带转动弹簧的杆单元平面钢结构二阶弹性分析  

THE SECOND ORDER ELASTIC ANALYSIS OF PLANE STEEL STRUCTURES WITH TWO ROTATIONAL SPRINGS

作　　者：胡习兵[1] 沈蒲生[1] 舒兴平[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《工程力学》2007年第4期24-28,共5页Engineering Mechanics

摘　　要：用两端带转动弹簧的杆单元代替一般的杆单元,提出了一种新的平面杆系钢结构二阶弹性分析计算模型。通过对杆单元的转角位移方程进行修正,推导了这种计算模型的结构弹性刚度矩阵和几何刚度矩阵,并编制了该种模型的一阶和二阶弹性分析计算程序,采用该程序对两个半刚性连接钢框架进行了计算分析,并将部分结果与有限元计算结果进行了比较。算例结果表明:该模型计算结果精度高,可用于结构初步设计与分析。A new calculation model for the second order elastic analysis of plane steel bar element structures is presented by replacing the general bar element with a new one, which has two rotational springs at its ends. By revising its rotation displacement equation, the rigidity matrix of this kind of structure is derived. The elastic and second order elastic analysis programs of this kind of struc^re are worked out. Two steel frames with semi-rigid connections are calculated with these programs, and part of results of these examples obtained in this way is compared with the results from limit element method. The results of calculations show that this model is reliable and helpful to the structural designs.

关 键 词：钢结构 计算模型 二阶弹性分析 杆单元 转动弹簧 

分 类 号：TU391[建筑科学—结构工程]