| 三塔悬索桥静动力特性与中塔选型 |
| |
| 引用本文： | 梁鹏, 吴向男, 李万恒, 徐岳. 三塔悬索桥静动力特性与中塔选型[J]. 交通运输工程学报, 2011, 11(4): 29-35. doi: 10.19818/j.cnki.1671-1637.2011.04.005 |
| |
| 作者姓名： | 梁鹏 吴向男 李万恒 徐岳 |
| |
| 作者单位： | 1.长安大学 陕西省公路桥梁与隧道重点实验室, 陕西 西安 710064;;2.交通运输部公路科学研究院, 北京 100088 |
| |
| 基金项目： | 国家自然科学基金项目(50808019); “十一五”国家科技支撑计划项目(2009BAG15B01); 中央高校基本科研业务费专项资金项目(CHD2009JC024) |
| |
| 摘 要： | 为探讨三塔悬索桥与两塔悬索桥静动力特性差异与中塔选型, 以泰州长江大桥为原型, 基于有限位移理论建立相应的两塔、三塔(混凝土中塔与钢中塔) 悬索桥的空间有限元模型, 分析了各种结构参数下的静力和地震效应。研究结果表明: 与两塔悬索桥相比, 由于中塔顶缺乏边缆的有效纵向约束, 三塔悬索桥整体刚度较小, 变形较大, 自振频率低; 汽车作用下主缆抗滑、桥塔受力、主梁挠跨比等在常规两塔悬索桥中很容易满足要求的指标, 但对三塔悬索桥却成为控制指标。三塔悬索桥的3个指标都与中塔抗推刚度密切相关, 但其对中塔抗推刚度的需求是矛盾的。“人”字形钢中塔三塔悬索桥的主缆抗滑安全系数为2.17, 汽车作用下桥塔最大应力为182 MPa, 最大挠跨比为1/210, 全部满足要求。可见, “人”字形钢中塔较好地兼顾了3个控制指标的需要, 做到了构件刚度和缆索体系刚度的优化, 是合理的中塔形式。
|
| 关 键 词： | 桥梁工程 三塔悬索桥 静动力特性 中塔选型 有限元分析 主缆抗滑安全系数 主梁挠跨比 |
| 收稿时间： | 2011-05-12 |
Static and dynamic properties of three-tower suspension bridge and structural type selection of mid-tower |
| |
| LIANG Peng, WU Xiang-nan, LI Wan-heng, XU Yue. Static and dynamic properties of three-tower suspension bridge and structural type selection of mid-tower[J]. Journal of Traffic and Transportation Engineering, 2011, 11(4): 29-35. doi: 10.19818/j.cnki.1671-1637.2011.04.005 |
| |
| Authors: | LIANG Peng WU Xiang-nan LI Wan-heng XU Yue |
| |
| Affiliation: | 1. Key Laboratory for Highway Bridge and Tunnel of Shaanxi Province, Chang'an University, Xi'an 710064, Shaanxi, China;;2. Research Institute of Highway of Ministry of Transport, Beijing 100088, China |
| |
| Abstract: | In order to discuss the static and dynamic properties differences between three-tower and two-tower suspension bridges,and select the rational structure type of mid-tower,based on the Taizhou Yangtze River Bridge,the 3D space finite element models of two-tower suspension bridge and three-tower suspension bridges with concrete mid-tower and steel mid-tower were set up by finite displacement theory and the static and seismal effects were analyzed under various structural parameters.Analysis result shows that ... |
| |
| Keywords: | bridge engineering three-tower suspension bridge static and dynamic properties structural type selection of mid-tower finite element analysis anti-slipping safety factor between main cable and saddle of mid-tower deflection-to-span ratio of main girder |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《交通运输工程学报》浏览原始摘要信息 |
|
点击此处可从《交通运输工程学报》下载全文 |
|
