摘要
基于半刚性连接钢框架结构的基本假定,经过严格的数学推导进一步给出了半刚性连接空间梁单元的刚度矩阵和固端等效结点荷载的显式形式。各单元的连接刚度均由一组介于0～1之间的无量纲刚度因子表示,当这些因子取不同数值时,模型将分别退化为理想铰接结构和完全刚性连接的空间刚架,并可方便地分析任意连接的混合杆系结构(如空间受弯构件与轴向受力构件的组合结构)而无须增加任何计算工作量。通过算例证明了该模型的正确性。
Based on the fundamental assumptions supposed for the framed structures with semi-rigid connections , the explicit forms of the elemental stiffness matrix and the corresponding equivalent nodal loads are further put forward through strict mathematical derivation for the spatial framed structures with arbitrary connections. The connection stiffeness is expressed as the stiffeness factor which takes the value between 0 and 1 . When the factor takes the different value, the model will be degenerated into the pinned and the fully rigid structures. Therefore the computational model can be used for analysis of the spatial steel frames with arbitrary connections, and the typical models of the spatial truss and the fully rigid-framed structure are unified into one model without the additional works. The correctness of the model is verified by some numerical examples.
出处
《空间结构》
CSCD
2003年第3期33-37,共5页
Spatial Structures
基金
浙江省自然科学基金(502152)
宁波市重点博士基金(01J20101-20)
