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http://dx.doi.org/10.12989/scs.2019.31.5.437

Research on static and dynamic behaviors of PC track beam for straddle monorail transit system  

Yang, Yongqing (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University)
Yang, Deng (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University)
Gou, Hongye (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University)
Bao, Yi (Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology)
Publication Information
Steel and Composite Structures / v.31, no.5, 2019 , pp. 437-452 More about this Journal
Abstract
In this study, in-situ static and dynamic tests of four pre-stressed concrete (PC) track beams with different span lengths and curvatures in a straddle monorail transit system were reported. In the static load tests, the strain and deflection at critical sections of the PC track beams were measured to determine the load bearing capacity and stiffness. The dynamic responses of strain, deflection, acceleration, and displacement at key positions of the PC track beams were measured under different train speeds and train loads to systematically study the dynamic behaviors of the PC track beams. A three-dimensional finite element model of the track beam-vehicle coupled vibration system was established to help understand the dynamic behavior of the system, and the model was verified using the test results. The research results show that the curvature, span length, train speed, and train loads have significant influence on the dynamic responses of the PC track beams. The dynamic performance of the PC track beams in the curve section is susceptible to dynamic loads. Appropriate train loads can effectively reduce the impact of the train on the PC track beam. The PC track beams allow good riding comfort.
Keywords
straddle monorail; PC track beam; in-situ static and dynamic tests; finite element; coupled vibration; dynamic responses; riding comfort;
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Times Cited By KSCI : 8  (Citation Analysis)
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