不同计算方法下鼓形蜂窝四支柱拉索穹顶结构构型与预应力状态的分析研究

IF 3.1 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Buildings Pub Date : 2024-01-10 DOI:10.3390/buildings14010179
Hui Lv, Zhaoquan Chen, Shilin Dong, Zhongyi Zhu, Xin Xie, Yanfen Zhong
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引用次数: 0

摘要

在对鼓形四支柱缆索穹顶的结构构造和预应力状态进行分析研究的基础上,我们对其结构构造进行了进一步研究。通过采用节点平衡方程求解穹顶索的预应力状态分析,我们比较了两种不同的索敷设方法对穹顶索结构预应力状态的影响。这两种方法包括上弦脊索径向水平投影长度相等和上弦脊索径向弦长相等。分析结果表明,索穹结构的上弦径向长度及其相应的径向水平投影长度可以有效反映结构配置的预应力状态趋势。此外,以升跨比 0.11 为临界值,索穹结构可分为扁球面结构和小半球面结构。在使用小升高跨度比分析结构时,发现两种结构配置之间的预应力计算差异小于 10%。此外,该结构的预应力分布更加均匀,预应力从内圈向外圈逐渐增加。然而,当升高跨度比增大时,两种结构配置的预应力计算结果之间的差异也随之增大,这就强调了在等径向弦长(弧长)的基础上部署上弦脊索的必要性。本文介绍的研究为采用这种配置的索穹的结构拓扑形式和预应力状态计算提供了新的见解。
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Analytical Study of Structural Conformation and Prestressing State of Drum-Shaped Honeycomb Quad-Strut Cable Dome Structure with Different Calculation Methods
Building upon the analytical study of the structural configuration and prestress state of the drum-shaped quad-strut cable dome, we conducted further investigation into its structural configuration. By employing the nodal equilibrium equations to solve the prestress state analysis of the cable dome, we compared the effects of two different cable laying methods on the prestress state of the cable dome structure. These methods include equal length of the radial horizontal projection of the upper chord ridge cables and equal radial chord length of the upper chord ridge cables. The analysis results show that the radial length of the top chord and its corresponding radial horizontal projection length of the cable dome structure can effectively reflect the trend of the prestress state of the structural configuration. Furthermore, by using a rise-to-span ratio of 0.11 as a threshold, the cable dome configuration is categorized into the flat spheroidal structural configuration and the small hemispheroidal structural configuration. When the structure is analyzed using a small rise-to-span ratio, the difference in prestress calculations between the two structural configurations is found to be less than 10%. Additionally, the structure exhibits a more uniform distribution of prestress, with the prestress gradually increasing from the inner circle to the outer circle. However, when the rise-to-span ratio increases, the difference between the prestress calculation results of the two configurations also increases, emphasizing the need to deploy upper chord ridge cables based on equal radial chord lengths (arc lengths). The research presented in this paper provides a novel insight into the structural topological form and prestress state calculation of cable domes with this configuration.
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来源期刊
Buildings
Buildings Multiple-
CiteScore
3.40
自引率
26.30%
发文量
1883
审稿时长
11 weeks
期刊介绍: BUILDINGS content is primarily staff-written and submitted information is evaluated by the editors for its value to the audience. Such information may be used in articles with appropriate attribution to the source. The editorial staff considers information on the following topics: -Issues directed at building owners and facility managers in North America -Issues relevant to existing buildings, including retrofits, maintenance and modernization -Solution-based content, such as tips and tricks -New construction but only with an eye to issues involving maintenance and operation We generally do not review the following topics because these are not relevant to our readers: -Information on the residential market with the exception of multifamily buildings -International news unrelated to the North American market -Real estate market updates or construction updates
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