預(yù)應(yīng)力損失對逐層雙環(huán)索穹頂結(jié)構(gòu)靜力性能的影響
[Abstract]:Cable dome is a kind of long-span space flexible structure system, which has ingenious conception, reasonable force, novel shape and economical cost. So far, cable dome is the most close to the tensioning integral system defined by Fuller. Based on the traditional sunflower cable dome structure system, a new sunflower type double-ring cable dome structure is proposed in this paper. The static performance of the structure and the design of new cable-bar joints are studied. Firstly, this paper introduces the structure system of double-ring cable dome layer by layer and the construction method of tensioning forming, and puts forward the technical scheme to solve the technical problems. According to the mechanical properties of the structure, a new cable-bar joint is proposed, which is suitable for the new structural system. Easy construction, low cost, can match with cable, can slide and lock, etc. Secondly, the static characteristics of a new sunflower double-ring cable dome structure with sliding cable friction are studied in this paper. The results show that the friction between the cables and the joints leads to the uneven distribution of the internal forces of the tension cables, which has a great influence on the static properties of the structures. Finally, in order to solve the shortcoming of the original length method of variable cable in solving the sliding problem of continuous cable with friction effect in cable dome structure simulation, an improved method of changing the original length of cable is proposed in this paper. It makes the calculation process of ansys software more clear and efficient. The static properties of the structure under the conditions of cable sliding and non-sliding after tensioning are obtained. The results show that the sliding ring cable can make the internal force distribution of the new sunflower double-ring cable dome layer by layer more uniform under asymmetric load and the displacement of each node increases accordingly. The results of the study provide ideas for the design of new nodes.
【學(xué)位授予單位】:浙江大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2013
【分類號】:TU399
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