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弦支穹顶结构由上部单层网壳和下部索杆系统组成。为进一步了解弦支穹顶结构的力学性能与施工张拉过程,以一跨度为122m的实际工程,制作了8∶122的缩尺模型。在模型的制作过程中,首先利用相似原理进行了各参数相似比的确定,然后进行了上部网壳、下部索杆和连接节点的设计与制作,同时针对试验内容与模型特点进行了应力与位移测点的布置。最后对该模型进行了全跨与半跨加载试验,试验过程中各节点分5级共施加了大小为80kg的集中荷载。分析结果表明:结构的试验值与理论值吻合较好;测量值相对较小、抗扰能力较弱的测点误差较大;加载与卸载过程中结构的内力与位移基本呈线性关系。该文的研究成果可为类似工程的设计与制作提供参考。
Suspension dome structure by the upper single-layer reticulated shell and the lower cable system components. In order to further understand the mechanical properties of the support structure and the construction tensioning process, a 8:122 scale model was made with an actual project spanning 122m. In the course of making the model, the similarity principle of each parameter was first determined by the similarity principle. Then the design and fabrication of the upper reticulated shell, the lower rod and the connecting node were carried out. At the same time, the stress and displacement Arrangement of measuring points. Finally, the full-span and half-span loading tests of the model were carried out. During the test, a total of 80kg concentrated loads were applied to each node in five steps. The results show that the experimental values of the structure are in good agreement with the theoretical values, the measured values are relatively small, and the error of measuring points with weak anti-jamming capability is relatively large. The internal forces and displacements of the structure are basically linear during loading and unloading. The research results of this paper can provide references for the design and production of similar projects.