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.
李学斌, 孟鑫, 周文武, 梁新华, 马西章, 马林. 高速铁路槽形梁静动力性能试验研究[J]. 铁道工程学报, 2022, 39(1): 39-46.
LI Xuebin, MENG Xin, ZHOU Wenwu, LIANG Xinhua, MA Xizhang, MA Lin. Experimental Research on the Static and Dynamic Performance of Trough Girder in High Speed Railway. Journal of Railway Engineering Society, 2022, 39(1): 39-46.
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2022, Vol. 39 
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