大跨度预应力混凝土简支槽型梁静动力试验研究  

STATIC AND DYNAMIC TEST STUDY OF A LONG-SPAN PRESTRESSED CONCRETE SIMPLE TROUGH BEAM

作　　者：刘孟富 LIU Meng-fu(China Civil Engineering Construction Corporation-UAE,50200,Abu Dhabi,UAE)

机构地区：[1]中国土木工程集团有限公司阿联酋分公司,阿联酋阿布扎比50200

出　　处：《建筑技术》2025年第3期359-362,共4页Architecture Technology

基　　金：中国土木工程集团有限公司科研计划课题(ZT-2020B03)。

摘　　要：预应力混凝土槽型梁作为一种新型桥梁结构,因具备建筑高度低、隔声降噪效果好等优点,在高速、重载铁路建设领域开始逐渐被运用。为验证槽型梁结构的静动力学性能,依托实际工程项目,对一跨度为48.5m的预应力混凝土简支槽型梁在列车荷载作用下的静动力学响应进行了研究。测试了结构在静载作用下的挠度与应力,以及重载货车以不同的运行速度通过桥梁时的动力响应,包括自振频率、动力系数、竖向与横向振幅和振动加速度、支座动位移等指标。试验结果表明,各项指标均满足相关规范要求,可以有效保证重载列车的平稳运营和安全性。现场实测结果,对于验证数值仿真计算结果、保证行车安全性有重要意义。试验方案设计可为同类桥梁现场测试提供参考。As a new type of bridge structure,prestressed concrete channel beam has been gradually applied in the field of high-speed and heavy-duty railway construction because of its advantages such as low building height and good sound insulation and noise reduction.In order to verify the static and dynamic performance of the troughs,this paper studies the static and dynamic response of a 48.5 m span prestressed concrete simple trough beam under train load.The deflection and stress of the structure under static load and the dynamic response of the heavy truck passing the bridge at different running speeds are tested,including natural vibration frequency,dynamic coefficient,vertical and lateral amplitude,vibration acceleration and dynamic displacement of the support.The test results show that all indexes meet the requirements of relevant specifications,which can effectively ensure the smooth operation and comfort of high-speed trains.The field measurement results in this paper are of great significance for verifying the numerical simulation results and ensuring the driving safety.The design of the test scheme can provide reference for the field test of similar Bridges.

关 键 词：高速重载铁路 简支槽型梁 静载试验 动载试验 力学性能 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]