不同约束条件下煤棚拱架支承形式设计与研究

以孙庄洗选厂煤棚骨架支承式膜结构为研究对象，建立了不同的钢结构模型以探究不同支承条件以及考虑基础刚度与否对结构响应的影响，分析比较了各模型自振周期、振型、支座反力、杆件内力、结构位移等的差异性。结果表明：当选择三肢落地支承形式时，基础刚度对结构受力性能影响较大|当选择两肢落地支承形式时，边界条件改变和基础刚度对结构受力性能影响不明显，边界条件建议选用铰接。

Design and Research of Tube Truss Structure’s Support Manner under Different Constraints

In order to study influences of changing supporting conditions and the basic stiffness or not on the structural responses, different finite element models were established to simulate the behaviors of coal shed skeleton structure. The structural parameters including natural vibration periods, modes, support reaction forces, member inner forces, and displacements were analyzed and compared. It was shown that the basic stiffness has a greater impact on the structural mechanical properties when using the three-limb floor support. Meanwhile, when selecting the two-limb floor support form, there are few significant differences observed among the force characteristics with different supporting conditions. Simultaneously, the basic stiffness effects slightly on the characteristics. Furthermore, it is recommended to use hinges as the boundary condition. hinges are recommended as the boundary condition.