Load Transfer Efficiency Based on Structural Deflection Assessment of the Precast Floating Track

Linh Vu,Yun Suk Kang

doi:10.3390/app11010120

Abstract

In Korea, a precast floating track with anti-vibration isolators was recently developed to reduce the vibration and noise in urban railway stations, without disrupting train operations. This precast floating slab track is a newly developed structure and differs from existing conventional slab tracks. In this study, a Finite Element Method program (MIDAS CIVIL 2019) was used to analyze the load-carrying ability of structures under the train axle loads. After finishing the design, to understand more precisely about load transfer efficiency of this type of track, an assembly test (two load cases) was conducted with three precast panels (with rail 60 K mounted on) and compared with Finite Element Analysis results. The final results satisfied the test standards in Korea, which confirms that the precast floating track has an acceptable safety factor and structural behavior.

Highlights

There are two common types of railway track are used in railway engineering: (a) ballasted track with concrete sleeper or wooden sleeper, and (b) non-ballasted or slab track structure
It is necessary to develop and research a non-destructive method such as ground penetrating radar (GPR) to limit these problems because the capacity of drainage in railway infrastructure is highly dependent on the fouled ballast [3]
Sci. 2021, 11, 120 the static loads to determine the load transfer efficiency of precast floating slab track. To model this type of precast floating slab track, based on this method, we considered the rail as a continuous beam mounted on the panels by fastening system and the panels was attached with the anti-vibration device as the elastic component

Summary

Introduction

There are two common types of railway track are used in railway engineering: (a) ballasted track with concrete sleeper or wooden sleeper, and (b) non-ballasted or slab track structure. The ballasted track has essential drawbacks such as high maintenance cost, fouled ballast, or insufficient support to the track structures. It is necessary to develop and research a non-destructive method such as ground penetrating radar (GPR) to limit these problems because the capacity of drainage in railway infrastructure is highly dependent on the fouled ballast [3]. Compared to the ballasted track, the non-ballasted or slab track has lower maintenance cost. It has been developed and become more popular in Korea, Japan, China, and Europe. At a railway station, the dynamic loads of the trains will be transmitted through the rails and slab track to the pillars, walls, and so on, which are the main structures that form the framework. We determined whether a precast floating track, which was manufacturedIninthaisfsatcutdoryy, w, teradnestepromrtiende,dawnhdetinhsetraallpedrecaatsat flcooantsintrgutcrtaicokn, wsithei,chcowualds mbaenaufsaucittuarbelde sionluatfiaocntotoryr,etdrauncseptohretendo,isaenadnidnsvtiabllreadtioant apcroobnlsetmrusc.tOiounrssittue,dcyouutldilibzeedaasupirteacbalsetsfololuattiinogn stloabretdrauccke stthreucntouirsee, awnhdicvhibisraatinoenwplryodbleevmelso.pOedurstsrtuucdtuyreu,tiulinzleikdeaepxirsetcinasgt cfloonavteinngtiosnlaabl ttrraacckk ssttrruuccttuurrees, .wWhiechasisseassneedwtlhyedperveeclaosptefdlosattriuncgtutrrea,cuknpliakneeel xsitsrtuinctgucroenuvseinngtiotnhael ftirnaictke esltermucetnutrems.etWhoedas(sMesIDseAdSthCeIVprILecpasrot gflroaamti)nagntdrasctkrupcatuneral lsatrsusectmubrelyutseisntgs tohevefirnifiyteietslesmtruenc-t tmureatlhpoedrf(oMrmIDaAncSe.CTIhVeILgoparloogfrtahmes)eatnedstsstwruacsttuoraelvalsusaemtebthlye tdeistpslatocevmeerniftyoiftsthsetrruaciltuanradl ppaenrfeolrtmoavnecreif.yTthheegsoaafel toyf othfetsheistessytsstewmasthtoroeuvgahlutahte tlhoeadditsrpanlascfeemr efnfticoiefnthcye.rail and panel to verify the safety of this system through the load transfer efficiency

Precast Floating Panel

Numerical Analysis

Results and Discussion

Load Case I