空间多功能加载装置的试验研究及有限元分析

Experimental Study of the Spatial Multi-functional Experimental Facility and Finite Element Analysis

为适应空间复杂节点工作性能的试验研究需求,设计并制作了由自平衡反力加载框架、液压千斤顶和其他辅助构件构成的空间多功能加载装置。该装置可进行平面节点和空间节点试验,能实现空间节点多个杆件(最大允许9根)同时加载,加载制度可采用单调加载或滞回加载,空间同时多向最大加载达10 000 k N。目前,该装置已成功应用于装配式平面钢框架梁柱节点和空间复杂相贯节点足尺试验。为验证该加载装置在空间多向设计荷载下的刚度和强度,采用有限元软件ABAQUS对加载框架进行了模拟分析。分析结果表明:1该加载装置安全、可靠;2空间复杂相贯节点足尺试验过程中,加载框架测点位移数值变化无规律性并非因框架屈服,而是由空间同时多向加载相互耦合所致。

In order to meet the needs of the experimental study on the performance of spatial complex joints,a multi-functional loading facility that is maded of the self balance loading frame,hydraulic jacks and other auxiliary components is designed and made. The facility that can test planar joints and spatial joints is able to load multi bars（ The maximum is 9） of joints. Monotonic loading and cyclic loading can be achieved. The facility provides maximum load reaching 10 000 k N in the condition of spatial multi-directional loading. At present,the facility has been successfully applied to planar joints of beam and column of steel frame experiment and spatial complex tubular joints experiment. In order to verify the stiffness and strength of the loading facility in the condition of spatial multi design load,the finite element software ABAQUS is used to simulate the loading frame. The analysis shows that： 1 The loading frame is safe and reliable; 2 In the full-scale experiment process of spatial complex tubular joint,the change of the displacement value of observation points of loading facility without regularity is mainly because of multi-directional loading interaction rather than yield of the frame.