|
|
|
| Experimental Research on the Static and Dynamic Performance of Trough Girder in High Speed Railway |
| LI Xuebin1, MENG Xin1, ZHOU Wenwu2, LIANG Xinhua2, MA Xizhang3, MA Lin1 |
1. Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081, China;
2. Xinyun Engineering Company of China Railway No.2 Engineering Group Co. Ltd,Chengdu,Sichuan 610031, China;
3. Xiong'an High Speed Railway Corporation Limited,Xiong'an,Hebei 071700, China |
|
|
|
Abstract Research purposes:In order to effectively use the main beam of trough girder to provide wind-retaining effect, prefabricated simply supported trough girders are widely used in 100-kilometre wind area of Lanzhou-Urumqi high speed railway in Xinjiang. Through bending static load test, transverse static load test in floor and driving test of EMU, bending rigidity, crack resistance, transverse tensile strain, natural frequency, dynamic coefficient, dynamic gain, rotating angle, amplitude, vibration acceleration of trough girder were analyzed, and the static and dynamic performance of trough girder was verified, to provide basis for subsequent design optimization.
Research conclusions:(1) In order to simulate the bending moment and torque of the mid-span section of trough girder synchronously in bending static load test, the method of the same longitudinal loads and different transverse loads at the loading points of webs on both sides can be adopted. (2) When the section or load of trough girder is asymmetric, the deflection of the webs on both sides can be converted to the centroid of the section to obtain the vertical deformation caused by the pure bending of the structure. (3) The bending rigidity and deflection and span ratio of trough girder under static and live load are two different values. (4) The actual bending rigidity of trough girder is greater than the design rigidity, and the crack resistance meets requirements in codes. The bottom plate is safe under the vertical load. (5) Under the load of EMU test train, the dynamic performance of trough girder meets the requirements of related acceptance standards for EMU running at 250 km/h and below. (6) The research results can provide reference for design optimization and related experimental study of trough girder.
|
|
Received: 26 June 2021
|
|
|
|
|
|
| [1] |
辛学忠.比利时高速铁路新型高架桥[J].国外桥梁,2001(2):1-2.Xin Xuezhong.New Viaduct of High Speed Railway in Belgium[J]. World Bridges,2001(2):1-2.
|
| [2] |
聂建国,胡红松.简支槽形梁考虑空间受力的理论解[J].工程力学,2012(12):64-71.Nie Jianguo,Hu Hongsong.Theoretical Solution of Simple Supported Trough Girder Considering Spatial Effect[J]. Engineering Mechanics,2012(12):64-71.
|
| [3] |
田杨,邓运清,黄胜前.双线铁路曲线简支槽形梁的空间分析[J].铁道工程学报,2012(7):24-28.Tian Yang,Deng Yunqing,Huang Shengqian.The Spatial Analysis of Curved Simple Trough Girder with Two-lane Railway[J]. Journal of Railway Engineering Society,2012(7):24-28.
|
| [4] |
田杨.上跨津山铁路PC槽形梁的力学特性分析[J].铁道工程学报,2018(9):58-63.Tian Yang. The Mechanical Property Analysis of PC Trough Girder Crossing over Tianjin-Shanhaiguan Railway[J]. Journal of Railway Engineering Society,2018(9):58-63.
|
| [5] |
王争鸣.兰新高铁穿越大风区线路选线及防风措施设计[J].铁道工程学报,2015(1):1-6.Wang Zhengming. Design of Route Selection of Windproof Measures for Strong Wind-hit Section of Second Double Line of Lanzhou-Urumqi Railway[J]. Journal of Railway Engineering Society,2015(1):1-6.
|
| [6] |
何涛.高速铁路分片式槽形梁设计研究[J].铁道建筑,2019(8):24-28.He Tao. Design Research of High Speed Railway Sliced Trough Girder[J]. Railway Engineering,2019(8):24-28.
|
| [7] |
李学斌.后张法预应力混凝土简支槽形梁试验研究[R].北京:中国铁道科学研究院铁道建筑研究所,2012.Li Xuebin. Experimental Study on Post-Tensioned Prestressed Concrete Simple Supported Trough Girder[R]. Beijing: Railway Engineering Research Institute,China Academy of Railway Sciences,2012.
|
| [8] |
孟鑫.兰新第二双线新疆段动态检测报告[R].北京:中国铁道科学研究院铁道建筑研究所,2014.Meng Xin. Dynamic Detection Report of Xinjiang Section of Lanzhou-Urumqi Second Double Line[R]. Beijing: Railway Engineering Research Institute,China Academy of Railway Sciences,2014.
|
|
|
|
2022, Vol. 39 
