| 用索梁活载比界定矮塔斜拉桥的方法 |
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| 引用本文： | 陈从春,肖汝诚.用索梁活载比界定矮塔斜拉桥的方法[J].同济大学学报(自然科学版),2007,35(6):724-727. |
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| 作者姓名： | 陈从春 肖汝诚 |
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| 作者单位： | 1. 同济大学,桥梁工程系,上海,200092;上海应用技术学院,土木建筑与安全工程学院,上海,200235
2. 同济大学,桥梁工程系,上海,200092 |
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| 摘 要： | 针对斜拉桥和矮塔斜拉桥的特点,研究了均布荷载作用下索梁的荷载响应,提出索梁活载比概念,并推导出计算公式,比较了该公式和有限元计算结果.结合国内已建斜拉桥和矮塔斜拉桥,提出按索梁活载比来界定斜拉桥和矮塔斜拉桥.研究表明,索梁活载响应能表征结构特性,对于研究其力学行为很有意义.
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| 关 键 词： | 矮塔斜拉桥 斜拉桥 应力幅 索梁活载比 响应 有限元 |
| 文章编号： | 0253-374X（2007）06-0724-04 |
| 修稿时间： | 2005-09-23 |
Method of Cable/Beam Live-Load Ratio for Distinguishing Extradosed Cable-Stayed Bridges |
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| CHEN Congchun,XIAO Rucheng.Method of Cable/Beam Live-Load Ratio for Distinguishing Extradosed Cable-Stayed Bridges[J].Journal of Tongji University(Natural Science),2007,35(6):724-727. |
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| Authors: | CHEN Congchun XIAO Rucheng |
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| Institution: | 1. Department of Bridge Engineering, Tongji University, Shanghai 200092, China; 2. School of Struction and Safety Engineering, Shanghai Institute of Technology, Shanghai 200235, China |
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| Abstract: | According to the characteristics of cable-stayed bridges and extradosed cablestayed bridges,the concept of cable/beam live-load ratio is introduced to analyse the response of cable and beam under uniform live load.The formulation of cable/beam live-load ratio is deduced and whose result is compared with that of finite element method(FEM).Domestic practices are used to analyse the cable/beam live-load ratio which is proposed to distinguish cable-stayed bridge and extradosed cable-stayed bridge.It is proved that the response of cable and beam under live load reflects structure trait and is meaningful for future research. |
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| Keywords: | extradosed cable-stayed bridge cable-stayed bridge stress amplitude cable/beam liveload ratio response finite element method |
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