Inicio  /  Applied Sciences  /  Vol: 12 Par: 22 (2022)  /  Artículo
ARTÍCULO
TITULO

The Train-Bridge Coupled Vibration Analysis of a Long-Span Prestressed Concrete Continuous Beam Bridge under Creep Deformation Effect

Hao Luo    
Chuyi Xu    
Xianbei Gan    
Mougang Liu    
Xiangrong Guo and Hui Guo    

Resumen

The track smoothness of high-speed railroads is severely limited to ensure train performance. The concrete continuous girder bridge is deformed to influence the smoothness of the bridge decks and track caused by creep bulge. There is a need to research the impact of beam creep on the dynamical response of bridge and train operation safety. This paper used Midas software to calculate the long-term deformation of large-span prestressed concrete continuous beam bridges under concrete creep and shrinkage. The train-bridge coupled system was established by adopting self-programming software. Thereafter, the large-term deformation results of the main girder are considered as track irregularity input into the vibration equation of the train-bridge system. The safety of the train operation was evaluated by calculating the dynamic response of the bridge and analyzing the criteria of train running safety. It was shown that the indicators of the large-span bridge are within the allowable code values under all working conditions. The bridge deformation under creep has an impact on the displacement and acceleration response of the bridge when a high-speed train passes through. There is no noticeable impact of creep deformation on the operational performance of trains. Nevertheless, the criteria for assessing the safety of trains? operation, such as derailment factor, wheel load differences, lateral wheel forces, and vehicle acceleration, have been increased.

 Artículos similares

       
 
Hongyin Yang, Nanhao Wu, Wei Zhang, Zhangjun Liu, Jianfeng Fan and Changjun Wang    
An improved spatial vehicle?track?bridge interaction system considering the unsupported track is proposed using the virtual work principle. When the track fails to be supported due to the defects under the track, the corresponding bridge?rail connection ... ver más
Revista: Applied Sciences

 
Quan Gu, Jinghao Pan, Yongdou Liu, Minhong Fu and Jianguo Zhang    
Dynamic response analysis of a train?track?bridge (TTB) system is a challenging task for researchers and engineers, partially due to the complicated nature of the wheel?rail interaction (WRI). When Newton?s method is used to solve implicit nonlinear fini... ver más
Revista: Applied Sciences

 
Donya Hajializadeh    
With the ever-increasing number of well-aged bridges carrying traffic loads beyond their intended design capacity, there is an urgency to find reliable and efficient means of monitoring structural safety and integrity. Among different attempts, vibration... ver más
Revista: Infrastructures

 
Brian Bachinilla, Ana Evangelista, Milind Siddhpura, Assed N. Haddad and Bruno B. F. da Costa    
High-speed railway is trending in developing countries for economic reasons, mobility in the aftermath of COVID-19, and environmental concerns. The high-speed railway operators continuously improve the operational speed to transport more passengers in le... ver más
Revista: Infrastructures

 
Essam Althaqafi and Eddie Chou    
The condition of a bridge is critical in quality evaluations and justifying the significant costs incurred by maintaining and repairing bridge infrastructures. Using bridge management systems, the department of transportation in the United States is curr... ver más
Revista: Infrastructures