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Steel and Composite Structures Volume 21, Number 5, August10 2016 , pages 1031-1043 DOI: https://doi.org/10.12989/scs.2016.21.5.1031 |
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Optimization of the construction scheme of the cable-strut tensile structure based on error sensitivity analysis |
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Lian-meng Chen, Dong Hu, Hua Deng, Yu-hong Cui and Yi-yi Zhou
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| Abstract | ||
| Optimization of the construction scheme of the cable-strut tensile structure based on error sensitivity analysis is studied in this paper. First, the element length was extracted as a fundamental variable, and the relationship between element length change and element internal force was established. By setting all pre-stresses in active cables to zero, the equation between the pre-stress deviation in the passive cables and the element length error was obtained to analyze and evaluate the error effects under different construction schemes. Afterwards, based on the probability statistics theory, the mathematical model of element length error is set up. The statistical features of the pre-stress deviation were achieved. Finally, a cable-strut tensile structure model with a diameter of 5.0 m was fabricated. The element length errors are simulated by adjusting the element length, and each member in one symmetrical unit was elongated by 3 mm to explore the error sensitivity of each type of element. The numerical analysis of error sensitivity was also carried out by the FEA model in ANSYS software, where the element length change was simulated by implementing appropriate temperature changes. The theoretical analysis and experimental results both indicated that different elements had different error sensitivities. Likewise, different construction schemes had different construction precisions, and the optimal construction scheme should be chosen for the real construction projects to achieve lower error effects, lower cost and greater convenience. | ||
| Key Words | ||
| cable-strut tensile structures; error sensitivity analysis; construction scheme; statistical analysis; model experiment | ||
| Address | ||
| (1) Lian-meng Chen. Dong Hu: College of Civil Engineering and Architecture, Wenzhou University, Wenzhou, 325035, China; (2) Hua Deng: Space Structures Research Center, Zhejiang University, Hangzhou 310027, China; (3) Yu-hong Cui: Sanjian Construction Group, Wenzhou, 325000, China; (4) Yi-yi Zhou: School of Civil Engineering and Architecture, Changzhou Institute of Technology, Changzhou 213002, China. | ||