32m超低高度混凝土T梁动力性能试验与分析  

Testing and Analysis of Dynamic Behavior of 32-m Span Very Shallow Concrete T-Beam

作　　者：赵体波[1] 朱渝[1] 周定九[1] 

机构地区：[1]铁道科学研究院铁道建筑研究所,北京100081

出　　处：《世界桥梁》2007年第1期56-59,共4页World Bridges

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。To study the operation conditions, safety and strengthening measures of the existing 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 cannot 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.

关 键 词：T形粱 超低高度 动力性能 自振频率 试验研究 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]