Interaction Study for Continuous Slab Track and Multi-Span Simple Beam Bridges

摘要

Since the mechanical properties of the continuous slab track (CST) structure and bridges arernextremely different compared with other track-bridge systems, a fine finite-element modelrnconsidering the rail, CST structure, multi-span simply-supported beams (span is 32m), and piersrnwas established in this paper to study the system’s mechanism. The stresses and deformations ofrnthe CST structure and simple beams under the braking forces of the train, temperature loads, andrnlive loads were calculated. The track-bridge effect was also compared when different slab track.rnThe calculation results show that the rail additional stress is minimal if the continuous slab track isrnused on the bridges. In addition, the influence of friction coefficient of the sliding layer wasrndiscussed. When the friction coefficient increases from 0.2 to 1.0, the tensile and compressivernstress in the base plate of the CST structure under the braking forces have increased 27% andrn15.6%, respectively; and the rail stress has increased 250% under the temperature change ofrnbeams. In summary, the CST structure can reduce the track-bridge effect obviously, and the stressrnin this slab track can be reduced further by reducing the friction coefficient of the sliding layer.