【摘要】 研究了极端强风荷载作用下输电杆塔连接节点的承载力特性。首先基于非线性有限元理论建立了输电塔线体系的分析模型，随后采用随机模拟方法建立了输电塔线体系强风荷载模型和荷载模拟方法及输电塔线体系风致响应的分析方法。进一步地建立了输电杆塔连接节点的精细化有限元模型及其承载力的非线性分析方法和非线性迭代收敛准则。以南方沿海地区某实际输电线路为工程背景，研究了极端强风荷载作用下杆塔节点的承载力特性。结果表明：极端强风荷载作用下输电塔发生损伤破坏，此时连接节点处也进入塑性，其承载力也表现出了非线性特点。更多还原

【Abstract】 The force-bearing capacity of joints of transmission tower subjected to ultimate strong wind was actively investigated.The analytical model of transmission tower-line system were established based on nonlinear finite element(FE)method.The model and simulating approach for wind loads were developed by using stochastic simulation method.In addition,a fine FE model of connecting joint was constructed and the corresponding analytical approach and convergence criterion for the force-bearing capacity of tower joints were also developed.A real transmission tower-line system constructed in southern China was taken as an example to investigate the force-bearing capacity of joints of transmission tower subjected to ultimate strong wind.The results indicate that the tower was damaged under strong winds and joint enters plastic stage.The force-bearing capacity of the tower joint presents nonlinear properties.更多还原