Tensioning Simulation of a Long-Span String-Supported Spoke-Type Roof Structure with CFRP Cables
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摘要: 碳纤维增强复合材料(CFRP)凭借其优异的材料特性,为大跨空间结构的张力构件提供了新的解决方案。在该背景下,某机场屋盖采用了CFRP索作为车辐式张弦结构的主受力构件,打造了全碳纤维索车辐式张弦结构。为明确此类结构在索张拉施工阶段的响应特征,结合该结构特点,制定了索张拉方案,并采用改进张力补偿法开展了碳纤维索张拉的全过程施工模拟,得到每一施工步下碳纤维索索力、结构变形、构件内力等响应参数。并通过对碳纤维索车辐式张弦结构张拉施工全过程的数值模拟,验证了结构设计的合理性、施工过程的可行性,并为实际施工提供了理论依据。Abstract: Carbon fiber reinforced polymer (CFRP) composites, owing to their exceptional material properties, offer a novel solution for cable components in long-span spatial structures. Therefore, a CFRP spoke-type tensegrity structure was implemented in the roof system of an airport, utilizing CFRP cables as the primary load-bearing elements. To better understand the structural responses during different construction stages, cable tensioning schemes were developed based on structural characteristics. A full-process simulation of CFRP cable tensioning was conducted using an improved tension compensation method, presenting key response parameters such as cable forces, structural deformations, and internal forces at each construction step. The numerical simulation of the entire tensioning process validated the rationality of the structural design and the feasibility of the construction procedure, thereby providing a theoretical foundation for the actual construction implementation.
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