(1 东南大学土木工程学院 南京 210096;2 南京市建筑设计研究院 210005)
［提要］ 钢板薄膜效应是从钢结构的受力蒙皮技术中拓展而来的，其主要特点是充分利用钢板在面内的抗剪和抗拉效应。在双向正交桁架上、下弦平面外将薄钢板与弦杆可靠无滑移连接，可以使钢板薄膜参与结构共同受力，从而改善原有结构的性能。提出了考虑钢板薄膜效应结构的有限元计算理论，并通过两组四个正交桁架模型的试验研究，论证了计算方法的可行性、准确性和钢板薄膜效应对于整体结构受力的贡献作用。
［关键词］ 薄膜效应 蒙皮 空间桁架 试验 协同工作
Experimental Research on Membrane Effect of Thin Plate in Bidirectional Trusses/Shu Ganping1,Chen Dahao1,Gu Jian1,Hou Shanming2,Bao Hongyan2,Jiang Han2(1 College of Civil Engineering，Southeast University，Nanjing 210096,China; 2 Nanjing Building Design & Research Institute，Nanjing 210005,China)
Abstract:Membrane effect of steel plate is evolved from the technology of stressed skin in steel structures,of which the characteristic is the sufficient utilization of tensility and shear resistance in the steel plate.With reliable connections,the thin steel plates,which are embedded in top and bottom chord member plane in a bidirectional truss,are able to bear the applied load jointly with the primary truss and then the behavior of the structure can be improved.Through the experimental research on four bidirectional truss models of two groups,the finite element analyses of this type structure are carried out and further more,the feasibility and veracity of this theory considering membrane effect and the improvement for the primary structural behaviors are demonstrated.
Keywords:membrane effect; stressed skin; bidirectional truss; experiment; cooperation