单向滑移支座节点受力性能研究  

RESEARCH ON BEARING PERFORMANCE OF SUPPORT JOINT SLIPPERY IN A SINGLE DIRECTION

作　　者：翟文博[1] 张国军 张爱林[1] 葛家琪 杨霄[3] Zhai Wenbo Zhang Guojun Zhang Ailin Ge Jiaqi Yang Xiao(Beijing University of Technology,Beijing 100124,China China Aviation Planning and Designing Institute （Group） Co. Ltd,Beijing 100120, China Architetual Design and Research Institute of Tsinghua University, Beijing 100084, China)

机构地区：[1]北京工业大学,北京100124 [2]中国航空规划设计研究总院有限公司,北京100120 [3]清华大学建筑设计研究院有限公司,北京100084

出　　处：《工业建筑》2016年第12期140-145,共6页Industrial Construction

摘　　要：针对某索膜整体张拉结构环桁架支座,比较了采用固定支座与采用铰支座的两种计算模型的受力性能,分析表明采用铰支座的模型受力性能较好。确定支座形式后,提出了一种径向可滑、环向限位铰支座,对该支座节点的受力性能进行了考虑摩擦接触的有限元计算分析。计算表明:节点在设计荷载下整体处于弹性工作阶段,满足强度要求且具有一定的强度储备;2.2倍设计荷载下节点开始进入屈服阶段,在2.84倍设计荷载下由于塑性过大而发生破坏。关于摩擦系数对支座节点受力性能影响的研究表明:摩擦系数的增大显著降低了节点的受力性能。构件加工过程中应采取打磨、加聚四氟乙烯板等措施保证球面板与下盖板接触面的光滑,保证支座的转动性能,以充分发挥其承载能力。In order to determine the support form of some cable-membrane tegresity structure,two kinds of calculation models were compared,one with fixed support and the other with hinge support. Analysis showed the model using the hinge support was better in mechanical performance. After the support form was determined,a hinge support slippery in radial direction and limited in ring direction was proposed. The finite element analysis and calculation were carried out in order to study the mechanical performance of the support joint. Calculation results showed that the joint stayed in elastic stage under the design load,which could meet the strength requirements,and had a certain strength reserve. The joint began to yield under 2. 2 times the design load and failed under 2. 84 times the design load due to the large plastic deformation. The research on the influence of friction coefficient on the performance of joints showed that the increase of friction coefficient significantly reduced the bearing capacity of the joints. Measures such as polishing and adding Teflon plate should be taken to ensure the smooth contact of the spherical plate and the lower cover plate and rotation performance of the joint,which can give full play to the bearing capacity of the hinge support.

关 键 词：支座节点 弹塑性分析 加载全过程 摩擦系数 

分 类 号：TU38[建筑科学—结构工程]