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| Research on the Optimization of Arch-axis and Column Layout Based on APDL Language |
| HOU Chun-hui,SONG Shun-xin |
| （China Railway Design Corporation, Tianjin 300251, China） |
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Abstract Abstract：Research purposes： On the purpose of fully understanding the method of optimization of arch-axis coefficient, the calculation principal of catenary arch-axis coefficient and the method of arch axis coefficient optimization are introduced in this article. Optimization procedure of arch-axis coefficient was also mentioned. At the end of this article, taking a long span deck-type reinforced concrete arch bridge as example, the whole optimization procedure is shown. In this example, least bending energy method was used while taking different column spacing and was compared with the traditional method which was called 5 points coincidence method. By comparing the results, reasonable column spacing, layout method and arch-axis coefficient were gained. Research conclusions： (1) Using the least bending energy method to optimize the arch-axis coefficient could help you to get a reasonable arch-axis coefficient. It is available in practical engineering. (2) According to the practical engineering mentioned in this article, by comparing the results of least bending energy method and 5 points coincidence method, along with engineering experience, 10 meters of the column spacing with no column on the arch middle top was used and the coefficient of 1.543 is the best choice for this bridge. (3)The research of this paper can be applied to the optimization design of arch-axis coefficient of arch bridges and reasonable column spacing.
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Received: 15 September 2017
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2017, Vol. 34 
