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动力分析计算模型。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刚度矩阵,提出了钢框架结构弯剪型层模型考虑杆端转角后的结构侧移刚度计算方法,分析了连接的半刚性对钢框架结构动力性能的影响。算例结果表明:连接的半刚性对结构动力性能的影响非常大,不容忽视。
A new calculation model for the dynamic analysis of plane steel bar element structures is presented by replacing the general bar element with a new one, which has two rotation springs at its ends. Revised its rotation displacement equation, the rigidity matrix of this kind of structure is derived in this paper. The calculation method of horizontal rigidity of steel frame structures is put forward, which considered the rotation of its element end. And the effects of semi-rigid connections on dynamic behaviors of steel frame structures are analyzed. The results of calculations show that the dynamic behaviors of steel structure is greatly influenced by the semi-rigid behavior of connection, and it cannot be neglected in its calculation.
出处
《工程抗震与加固改造》
2006年第6期30-33,38,共5页
Earthquake Resistant Engineering and Retrofitting
关键词
钢结构
半刚性连接
动力性能
杆单元
转动弹簧
steel structure
semi-rigid connection
dynamic behavior
bar element
rotation spring
