| 三索面斜拉桥索塔锚固区的精细有限元分析及应力优化 |
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| 引用本文： | 刘炎海,蔺鹏臻,刘凤奎. 三索面斜拉桥索塔锚固区的精细有限元分析及应力优化[J]. 特种结构, 2010, 27(6): 96-98,103 |
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| 作者姓名： | 刘炎海 蔺鹏臻 刘凤奎 |
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| 作者单位： | 兰州交通大学甘肃省道路桥梁与地下工程重点实验室,730070 |
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| 摘 要： | 结合某大跨度公铁两用斜拉桥的三索面单箱三室混凝土索塔结构,提出了全面考虑锚固区受力的三维数值建模方法,应用通用有限元软件ANSYS建立锚固区精细分析的有限元模型,分析了恒载、汽车和火车等活载共同作用下锚固区应力场分布规律。针对索塔锚固区横向应力过大的问题,提出了锚固区预应力优化建议。通过锚固区预应力的优化调整,实现了减小锚固区应力的目的。
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| 关 键 词： | 斜拉桥 索塔 锚固区 应力场 有限元 优化 |
Finite Element Analysis and Stress Optimization of Anchorage Zone on Tower of Cable-stayed Bridge with Three Cable Planes |
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| Liu Yanhai,Lin Pengzhen,Liu Fengkui. Finite Element Analysis and Stress Optimization of Anchorage Zone on Tower of Cable-stayed Bridge with Three Cable Planes[J]. Special Structures, 2010, 27(6): 96-98,103 |
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| Authors: | Liu Yanhai Lin Pengzhen Liu Fengkui |
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| Affiliation: | Liu Yanhai Lin Pengzhen Liu Fengkui(Key Laboratory of Road ＆ Bridge and Underground Engineering of Gansu Province, Lanzhou Jiaotong University,730070 China) |
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| Abstract: | As the background of longer span highway railway cable-stayed bridge, based on its special single box three cells sectional tower with three cable planes ,3D numerical modeling method considering about the stress in anchorage zone is presented and fine finite element model of anchorage zone is set up with program of ANSYS. Stresses field of anchorage zone segment is analyzed under dead, vehicle and train loads. According to its larger value of transverse -stress , the optimal method for prestress in anchorage zone is presented. After optimization of prestress, the stresses of anchorage zone is decreased. |
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| Keywords: | Cable-stayed bridge Tower Anchorage zone Stress field Finite element method Optimization |
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