建立了燃机房屋面空间三角管桁架整体计算模型和单榀计算模型。对燃机房屋面桁架支座采用铰接连接、滑动连接以及考虑燃机房双支柱约束的简化模型进行了计算分析。比较了燃机房屋面桁架各种计算简化模型的计算结果，分析了桁架支座约束、燃机房结构刚度、燃机房屋面混凝土板以及桁架单榀建模对设计结果的影响，可供工程设计参考。

The overall calculation model and single computational model was built for the space triangle pipe truss of the gas turbine room roofing. The simplified model for the gas turbine room roofings truss bearing was analyzed, on the basis of using hinge connection, sliding connection, and two support restraint. This paper compared the calculation results of different simplified models for the gas turbine room roofings truss, and investigated the impact of truss support restraint, gas turbine rooms structural stiffness, roofings concrete slab, and trusss single beam calculation model, which could provide references for the engineering design.