[1]朱德华,王立彬*,李建慧.自锚式悬索桥结构设计参数敏感性分析[J].林业工程学报,2018,3(01):128-134.[doi:10.13360/j.issn.2096-1359.2018.01.021]
 ZHU Dehua,WANG Libin*,LI Jianhui.Sensitivity analysis on structural design parameters of self-anchored suspension bridge[J].Journal of Forestry Engineering,2018,3(01):128-134.[doi:10.13360/j.issn.2096-1359.2018.01.021]
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自锚式悬索桥结构设计参数敏感性分析()
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《林业工程学报》[ISSN:1001-8081/CN:32-1160/S]

卷:
3
期数:
2018年01期
页码:
128-134
栏目:
森林工程与土建交通
出版日期:
2018-01-15

文章信息/Info

Title:
Sensitivity analysis on structural design parameters of self-anchored suspension bridge
文章编号:
2096-1359(2018)01-0128-07
作者:
朱德华王立彬*李建慧
南京林业大学土木工程学院,南京 210037
Author(s):
ZHU Dehua WANG Libin* LI Jianhui
College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
关键词:
自锚式悬索桥 设计参数 敏感性分析 有限元法
Keywords:
self-anchored suspension bridge design parameters sensitivity analysis finite element method
分类号:
U448.25
DOI:
10.13360/j.issn.2096-1359.2018.01.021
文献标志码:
A
摘要:
为了研究自锚式悬索桥结构设计参数对其力学性能的影响,采用非线性有限元法分析主梁边中跨比、主缆矢跨比及主塔高度等结构参数对其受力性能的影响。结果表明:边中跨比的合理范围为0.32~0.47,主缆矢跨比为1:4.5~1:9.0,主塔高度为20~80 m。边中跨比的变化会引起结构线形及内力的变化,对自锚式悬索桥受力性能的影响较大。主梁挠度对边中跨比的变化较为敏感,主梁跨中弯矩和主塔根部弯矩对边中跨比变化的敏感程度大致相同。主缆矢跨比的变化对主梁变形和弯矩的影响明显,主缆水平分力和主梁轴力对主缆矢跨比的变化并不敏感。主塔高度的变化也会引起主梁和主塔弯矩的显著变化,主梁轴力对主塔高度变化敏感度较低。自锚式悬索桥的结构设计参数的确定不仅要满足结构受力要求,也应兼顾结构参数选择的合理性。
Abstract:
In order to study the effect of structural design parameters of self-anchored suspension bridge on the mechanical properties, structural parameters such as the ratio of side to main span, the rise-span ratio of main cable and the height of main tower were selected to analyze the bridge mechanical performance by using the nonlinear finite element method. Results showed that the reasonable range of the ratio of side to main span is between 0.32 and 0.47, the rise-span ratio of main cable is between 1:4.5 and 1:9.0, and the height of main tower is between 10 m and 80 m. The changes of the ratio of side to main span show great influence on the mechanical properties of self-anchored suspension bridge, which caused the changes of the structural shape and internal force. The deflection of the main girder is more sensitive to the change of the ratio of side to main span, and the bending moment at the middle main span girder and the bending moment at the main tower root have the same sensitivity to the change of the ratio of side to main span. The influence of the change of the rise-span ratio of the main cable on the deformation and bending moment of the main girder is obvious, but the horizontal force of the main cable and the axial force of the main girder are not sensitive to the rise-span ratio of the main cable. The change of the height of the main tower also causes the significant effect on the bending moment of the main girder and the main tower, while the axial force of the main girder is less sensitive to the height of the main tower.The determination of the structural design parameters of self-anchored suspension bridge should not only meet the requirements of structural force, but also take into account the rationality of structural parameter selection.

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备注/Memo

备注/Memo:
收稿日期:2017-04-11 修回日期:2017-09-21
基金项目:高等学校博士学科点专项科研基金(20133204120015); 江苏省高等院校自然基金(12KJB560003)。
作者简介:朱德华,男,研究方向为道路与铁道工程。通信作者:王立彬,男,教授。E-mail:jhwlb@163.com
更新日期/Last Update: 2018-01-10