Test and Numerical Investigation Mechanical Behavior of Cable Dome

다국어 초록 (Multilingual Abstract)

Cable dome structure is a kind of space steel structure system with stay cable, hoop cable, ridge cable and brace strut. In order to study the mechanical properties of cable dome with different stay (steel tie rod and steel cable), two 6-m-span cable dome structures were designed and manufactured. One is with steel tie rod (SR), other is with steel cable (SC). Meanwhile, two finite element models, which were identical with the solid model, were established to analyzed the mechanical properties of the cable dome and compared with the test results. The static mechanical properties of the cable domes (SC, SR) with Full-span load and Half- span load were analyzed by test. The results show that the internal forces of the two kinds of cable domes increased with the increased of Full-span load. The vertical displacement of the cable dome (SR) was smaller than that of the cable dome (SC). When the structure was under Half-span load, the stress of the two cable domes on the loading side was relatively complex, and the internal force of the rods on the loading side varies greatly, which indicating that the structure was very sensitive to the asymmetric load. The variation trend between the simulated value and the test value was consistent, which verifies the correctness of the finite element model. Furthermore, the natural frequencies of the structure with three different load state were tested by using the exciter excitation method. The results show that the natural frequencies of the two cables were dense, and the damping ratio of the cable dome (SC) structure was basically in the range of 0.0115–0.0238, and the damping ratio of the cable dome structure (SR) was basically in the range of 0.0081–0.0132, Which can provide reference for similar cable dome structures in practical projects.

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