Non-linear 2-D FE analysis for the assessment of isolation performance of wave impeding barrier in reduction of railway-induced surface waves

Applicability of a Three-Layer Model for the Dynamic Analysis of Ballasted Railway Tracks

“…Three values of the Young modulus were chosen for the ballast and subgrade, which cover the relevant range found in the literature while excluding extreme values that are not representative of typical railway The subgrade depth can be defined as the depth at which a significantly rigid substrate is found, or as a reasonable depth after which the deformations due to surface loads are negligible (the so-called active depth of the soil [56,57]). A great variety of such values can be found in the literature: some adopt values of the order of 3 m [58,59], while others consider much higher values, from 10 m [60,61] to 50 m [62][63][64] and as high as 70 m [65]. Given this variability, five different depths of the subgrade (h s ) are studied: 3, 6 and 9 m (relatively shallow subgrade), 25 m (an average depth) and 50 m (a high depth).…”

Numerical Investigation on Vibration Screening Using Geofoam and Sand–Crumb Rubber Mixture Infilled Trench

“…Therefore, presently many researchers have shifted towards finding a proper infill material considering factors such as attaining efficiency close to OT and utilization of non-biodegradable waste materials. The dynamic transmission behavior of local sub-soil can be changed through a complex wave reflection and mode modification process by building a wave barrier using a wave impeding block [22]. Several works have been reported in the literature using geofoam as an infill material [15,19,[23][24][25][26].…”

Ground-vibrations induced by trains: Filled trenches mitigation capacity and length influence

“…The use of finite element models is widespread in trenches screening ability studies and, in order to contain the computational burden (reducing the effective time analysis), the train modeling is usually avoided, preferring to implement an appropriate loading function representative of the forces transmitted by the trains wheels to the track [24,25]. Through the development of a 2-D finite element model Adam and Von Estorff [26] studied the efficacy of open and filled trenches in reducing the stress actions on a building structural elements (girders and columns), while Celebi and Kirtel [27] studied the screening performance of trench barriers considering the Mohr-Coulomb constitutive law (linear elastic model with post-failure plasticity) to better simulate the real soil behavior.…”