- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | ZHANG Zheng, LOU Huibin, SUN Li, ZHU Bin, REN Xichong. Theoretical and Experimental Study on Design Scheme of Vibration Damping Prefabricated Track[J]. Journal of Southwest Jiaotong University, 2023, 58(3): 630-637. doi: 10.3969/j.issn.0258-2724.20210517
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In order to adapt to the large-scale construction of urban rail transit and meet the needs of vibration reduction, a new type of prefabricated ballastless track structure is proposed. The vehicle ballastless track coupling dynamic analysis model and indoor full-scale test model are established to study the mechanical properties of the vibration reduction prefabricated track structure. The results show that the system dynamic response indexes of vibration damping assembled track structure under the action of train dynamic load are within the safety limit, meeting the requirements of driving safety and comfort. The maximum compressive strain of track structure concrete in static load test is −129.6 με, which is far less than the limit strain of concrete. After unloading, the residual deformation is very small, the track elasticity is good, and the structural bearing capacity meets the requirements. Under the action of fatigue load, the overall deformation of the structure is small, no crack is found, and the anti fatigue performance is good. The track vibration decreases layer by layer from top to bottom, the frequency is between 100−125 Hz, the maximum vibration reduction effect can reach 12.4 dB, the structure vibration reduction effect is significant and the vibration reduction stability is good.
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