基于半刚性节点的既有空间钢结构的位移计算  

DISPLACEMENT COMPUTATION OF AN EXISTING SPACIAL STEEL STRUCTURE BASED ON SEMI-RIGID JOINTS

作　　者：夏健明[1] 陈鹏[1] 孙诗文 XIA Jian-ming;CHEN Peng;SUN Shi-wen(Dept,of Civil Engineering,Guangdong Technical College of Water Resource and Electric Engineering,510635,Guangzhou,China)

机构地区：[1]广东水利电力职业技术学院土木工程系,广州510635

出　　处：《建筑技术》2020年第11期1389-1392,共4页Architecture Technology

摘　　要：用有限元软件ANSYS计算既有空间钢结构的位移,并与实#1位移比较。将钢结构节点看作刚性连接,计算位移与实测位移相差很大;将节点看作半刚性连接,用扭转弹簧描述节点的半刚性,扭转弹簧刚度与节点相连各杆的线刚度和成正比。当扭转弹簧刚度系数为2.125时,节点7的计算位移与实测位移吻合较好,表明考虑节点的半刚性,空间钢结构的计算位移与结构的实际位移吻合良好。Displacements of an existing spacial steel structure are computed by ANSYS,and the computations are compared with measured displacements.When the joints are regarded as rigid connections,the difference between computational and measured displacements is large.Joints are regarded as semi-rigid connections,whose semi-rigidities are defined by torsional springs.The stiffness of the torsional spring is proportional to the sum of the linear stiffness of members connecting to the joint.When the torsional spring stiffness coefficient is 2.125,the computational displacements are good agreed with the measured displacements.It is shown that when the semi-rigidity of the joint is taken into account,computational displacements of spacial steel structures are good agreed with real displacements.

关 键 词：半刚性节点 空间钢结构 位移 

分 类 号：TU74[建筑科学—建筑技术科学]