多跨反对称拱塔斜拉桥受力性能研究

doi:10.16182/j.issn1004731x.joss.201803050

摘要/Abstract

摘要： 。为探究反对称拱塔斜拉桥在不同拱塔截面和矢跨比下的受力状态,分析了在不同拱截面和矢跨比的情况下桥梁的受力状况。通过有限元仿真计算讨论了在恒载、恒温等条件下,不同矢跨比和不同类型拱截面的拱肋应力、桥面的挠度和相应的动态特性。计算结果表明：在相同截面面积的条件下,相比于其他类型的拱塔截面,圆截面的受力性能更好,桥面挠度较小且拱塔上最大应力显著降低,整桥刚度较大。对反对称拱塔斜拉桥进行了模态分析,为桥梁的建设及抗震设计等提供了一定的理论依据。

关键词: 桥梁工程, 有限元, 斜拉桥, 矢跨比

Abstract: In order to analyze its force under different sections and arch span ratio of the Antisymmetric arch tower cable-stayed bridge, the paper takes an anti-symmetric arch tower cable-stayed bridge as an engineering example. Considering the effect of dead load and temperature, finite software is used to calculate the stress of the arch tower and deflection of the deck and its corresponding dynamic characteristics under different types of arch sections and different rise-span ratio of the arch. The results show that the circular cross-section has better mechanical performance compared with other types of arches tower section with the same cross-sectional area. When it is circular cross section arch tower, the bridge deflection is smaller, while the tower arch maximum stress can be significantly reduced. In the same condition when arch tower section is circular cross-section, the entire bridge has a higher base frequency, rigidity is greater. This paper also conducts a preliminary analysis for the bridge vibration mode, providing a certain reference for the construction of these bridges.

Key words: bridge engineering, finite element, cable-stayed bridge, span ratio

中图分类号:

U441.5

刘习军, 袁博, 刘天翼. 多跨反对称拱塔斜拉桥受力性能研究[J]. 系统仿真学报, 2018, 30(3): 1171-1177.

Liu Xijun, Yuan Bo, Liu Tianyi. Structure Optimization Analysis of Multi-span Antisymmetric Arch Tower Cable-stayed Bridge[J]. Journal of System Simulation, 2018, 30(3): 1171-1177.

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