| 体外预应力简支梁的动力性能分析 |
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| 引用本文： | 王海洋,李亮亮. 体外预应力简支梁的动力性能分析[J]. 公路交通科技, 2006, 23(1): 70-73 |
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| 作者姓名： | 王海洋 李亮亮 |
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| 作者单位： | 1. 广东华美加工程顾问有限公司,广东,广州,510627
2. 广东华美加工程顾问有限公司,广东,广州,510627;浙江省交通规划设计研究院,浙江,杭州,310006 |
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| 摘 要： | 为了解体外预应力索对结构动力性能的影响,针对简支梁的体外预应力的一般形式,文章采用能量法建立了体外预应力简支梁桥的一阶固有振动方程,对采用体外预应力的简支梁桥在预应力索和梁共同作用下的动力性能进行了研究。通过数值算例验证了体外预应力对简支梁桥振动频率和振动模态的影响。分析结果表明体外预应力简支梁的振动特征与梁端受有外力后的振动特征是不同的,体外预应力对改善梁体的动力性能没有显著效果。
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| 关 键 词： | 体外预应力 无粘结预应力 能量法 动力分析 固有频率 |
| 文章编号： | 1002-0268(2006)01-0070-04 |
| 收稿时间： | 2004-08-24 |
| 修稿时间： | 2004-08-24 |
Dynamic Performance Analysis of Simple Beam with Extemal Prestressing Force |
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| WANG Hai-yang,LI Liang-liang. Dynamic Performance Analysis of Simple Beam with Extemal Prestressing Force[J]. Journal of Highway and Transportation Research and Development, 2006, 23(1): 70-73 |
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| Authors: | WANG Hai-yang LI Liang-liang |
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| Abstract: | This paper aimed to study the external prestress's influence to the dynamic performance.To the simple beam with external prestress,dynamic performance is studied under the co-action of prestressing reinforcement and beam.The first order equation of natural vibration is established using energy method for the external prestress beam.And numerical example is adopted to explain the influence of external prestress to the vibration frequency and modality for simple beam.The vibration performance under external prestress and performance under external force is different.External prestress reinforcement has no significant effect on the beam's dynamic performance. |
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| Keywords: | External prestress Prestress without bond Energy method Dynamic analysis Natural frequency |
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