|
Title |
Safety Evaluation on Interaction between Track and Bridge in Continuous Welded Railway Bridge Considering Seismic Load
|
|
DOI |
http://dx.doi.org/10.11112/jksmi.2016.20.2.040 |
|
Keywords |
장대레일교량 ; 지진하중 ; 레일부가응력 ; 레일-상판 상대변위 Continuous welded railway(CWR) bridge ; Seismic load ; Additional axial rail stress ; Relative displacement in rail-bridge deck |
|
Abstract |
To observe the rail-slab interaction in continuous welded railway(CWR) bridge when earthquake occurs, additional axial rail stresses and relative longitudinal displacements between rail and bridge deck were calculated with input of various load combinations and 3 different types of seismic loads to an analytical model. As results of analysis, it can be found that standard response spectrum proposed by Korea Rail(KR) network authority for earthquake design showed less additional axial rail stresses than allowable levels, but greater relative longitudinal displacement between rail and bridge deck, which means that adjustment of relative longitudinal displacement within a standard level is much more difficult than axial train stress. Additionally, if a large-scaled earthquake as occurred at Kobe, Japan comes up, then both of additional axial rail stress and relative displacement in rail-bridge deck may exceed allowable levels, which indicates to make proper design guides against sudden earthquake occurrence.
|