| 移动荷载作用下三塔悬索桥的强迫振动研究 |
| |
| 引用本文： | 冯兆祥,陈亮,缪长青.移动荷载作用下三塔悬索桥的强迫振动研究[J].中国工程科学,2012,14(5):80-84. |
| |
| 作者姓名： | 冯兆祥 陈亮 缪长青 |
| |
| 作者单位： | 1. 江苏省长江公路大桥建设指挥部,江苏泰州,225321
2. 东南大学土木工程学院,南京,210096 |
| |
| 基金项目： | 国家科技支撑计划资助项目（2009BAG15B03）；国家自然科学基金资助项目（51078080）；江苏省自然科学基金资助项目（BK2008316）；江苏省“333高层次人才培养工程”专项资助 |
| |
| 摘 要： | 针对泰州大桥开展结构动力特性计算，分析了不同移动速度以及不同移动荷载大小对于三塔两跨悬索桥结构动力响应的影响。结果表明，三塔两跨悬索桥的一阶竖弯振动基频约为0.08 Hz,远低于载重汽车的固有频率，不会形成共振条件。简单的移动荷载作用下三塔两跨连续支承悬索桥的内力、位移响应与同等静力荷载作用效果比较接近。移动荷载的质量越大、速度越大，结构的内力、位移响应就越大，并与车重呈近似正比例关系。结构内力、位移的荷载放大系数不随移动荷载质量的大小而改变。
|
| 关 键 词： | 动力特性 强迫振动 响应 荷载放大系数 |
| 收稿时间： | 2012/3/15 0:00:00 |
| 修稿时间： | 2012/3/15 0:00:00 |
The study of forced vibration for three tower suspension bridge under moving loads |
| |
| Feng Zhaoxiang,Chen Liang and Miu Changqing.The study of forced vibration for three tower suspension bridge under moving loads[J].Engineering Science,2012,14(5):80-84. |
| |
| Authors: | Feng Zhaoxiang Chen Liang and Miu Changqing |
| |
| Affiliation: | Jiangsu Provincial Yangtze River Highway Bridge Construction Commanding Department, Taizhou,
Jiangsu 225321, China;College of Civil Engineering,
Southeast University, Nanjing 210096, China;College of Civil Engineering,
Southeast University, Nanjing 210096, China |
| |
| Abstract: | Taking Taizhou Bridge for example, dynamic characteristics of the finite element model are analyzed and then the effects of different moving speeds and loads on dynamic response of three tower two span suspension bridge are studied. The result demonstrates that vertical bending of natural frequency is approximately 0.08 Hz, which is far below natural frequency loading truck, and will not form resonance condition. The response of force and displacement of three tower two span continuous suspension bridge under simply moving loads and equivalent static loads are the same. The structural will be greater when moving loads quantity and speed become greater and they have similar positive relationship. However, the load amplification factor of structural force and displacement does not vary with the quantity change of moving loads. |
| |
| Keywords: | dynamic characteristics forced vibration response load amplification factor |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《中国工程科学》浏览原始摘要信息 |
|
点击此处可从《中国工程科学》下载全文 |
|
