【摘要】 针对轮扣式脚手架节点使用中存在的问题,提出了一种新型的轮扣式脚手架节点。并对轮盘名义厚度分别为8,10 mm的两批次共25个节点进行了转动刚度试验。试验结果表明:轮扣式钢管脚手架节点具有典型的半刚性连接特性,轮盘厚度为10 mm的节点其转动刚度可达32. 52 k N·m/rad,高于相关规范的24 k N·m/rad限值,也明显高于8 mm厚轮盘的节点转动刚度。基于有限元分析软件ABAQUS建立了数值分析模型并与节点试验进行了对比。发现数值分析得到的转动刚度要略高于试验值,但除了直插头插入大口时的误差相对较大外,直插头插入标准口和小口时数值分析得到的转动刚度和试验结果吻合程度较好。更多还原

【Abstract】 In view of the problems existing in the use of the pulley-clip scaffold joint,a new type of round buckle scaffold joint was proposed. The rotational stiffness test was carried out for a total of 25 joints with two batches of the disk nominal thickness of 8 mm and 10 mm. The test results indicated that the round buckle steel pipe scaffold joint had typical semi-rigid connection characteristics,the rotational stiffness of the joint of 10 mm disk thickness could reach 32. 52 k N·m/rad. which was higher than of 24 k N·m/rad limit values proposed by the relevant specifications,and was also significantly higher than the joint of 8 mm disk thickness. Based on the finite element analysis software of ABAQUS,some numerical analysis models were established and compared with the joint rotational stiffness test. Generally,the rotational stiffness obtained by the numerical analysis was slightly higher than that of the test. And the numerical analysis results of the straight plug inserting into the standard socket and small socket agreed well with the test results,except for the straight plug inserting into the big socket. This study could provide a reference for the future application of round buckle formwork support.更多还原