| 32 m超低高度混凝土T梁动力性能试验与分析 |
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| 引用本文： | 赵体波,朱渝,周定九.32 m超低高度混凝土T梁动力性能试验与分析[J].世界桥梁,2007(1):56-59. |
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| 作者姓名： | 赵体波 朱渝 周定九 |
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| 作者单位： | 铁道科学研究院铁道建筑研究所,北京,100081 |
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| 摘 要： | 为了研究开行120km/h货车后既有铁路32m超低高度混凝土T梁的运营状况、安全性和加固对策,选取1孔32m超低高度混凝土T梁进行自振频率、挠度、振幅等主要动力性能测试。结果发现跨中横向振幅超过限值,不能满足120km/h货车运行,需要提高该梁的竖向和横向刚度。
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| 关 键 词： | T形梁 超低高度 动力性能 自振频率 试验研究 |
| 文章编号： | 1671-7767（2007）01-0056-04 |
| 收稿时间： | 2006-05-15 |
| 修稿时间： | 2006年5月15日 |
Testing and Analysis of Dynamic Behavior of 32-m Span Very Shallow Concrete T-Beam |
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| ZHAO Ti-bo,ZHU Yu,ZHOU Ding-jiu.Testing and Analysis of Dynamic Behavior of 32-m Span Very Shallow Concrete T-Beam[J].World Bridges,2007(1):56-59. |
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| Authors: | ZHAO Ti-bo ZHU Yu ZHOU Ding-jiu |
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| Abstract: | To study the operation conditions,safety and strengthening measures of the exist- ing 32-m span very shallow railway concrete T-beams after freight trains run through at a speed of 120 km/h,a span of the type of the beams is taken for testing of its major dynamic behavior of natural vibration frequency,deflection and vibration amplitude.The results of the testing indicate that the lateral vibration amplitude at midspan of the beam exceeds the limit value,the beam can- not meet the requirements for the freight trains running at a speed of 120 km/h,and the vertical and lateral rigidity of the beam should be raised. |
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| Keywords: | T-beam very shallow depth dynamic behavior natural vibration frequency test study |
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