Intensive Research on the Breaking Force of Continuous Welded Rail on Bridge.

The value of the rail-breaking force in the TB10015-2012 Code for Design of Railway Continuous Welded Rail is conservative and sometimes restricts the design of the bridge. This paper takes the 16, 20, 24, 32 m and 40 m simply supported beams commonly used in railway as research objects, and establishes the three-dimensional finite element calculation model of the rail-bridge-beam abutment. The established model is used to calculate the rail breaking force of the abutment under the conditions of four rail breaking and single rail breaking in view of the ballastless and ballasted tracks, and different stiffness of simply supported beam abutments. On this basis, the correction coefficient of the breaking force calculation formula is proposed. The research results show that the correction coefficient of 16m and 40m simply supported beams is respectively 0. 98 and 0. 8 times of the standard value, the longer the simply supported beam span, the smaller the correction coefficient; the correction coefficient of ballastless track and ballasted track for the 40m span simply supported beam is respectively 0.8 and 0.9 times of the standard value; for simply supported beams of the same span, the correction coefficient of ballastless track is smaller than that of ballasted track. [ABSTRACT FROM AUTHOR]