Evaluation on the dynamic performance of bridge approach backfilled with fibre reinforced lightweight concrete under high-speed train loading

Assessment of the use of fiberglass-reinforced foam concrete in high-speed railway bridge approach involving foundation cost comparison

“…Typical rupture of tested specimen with the density of 700 kg/m 3 and variations of normalized strength parameters with the fiber content: (a) fiberglass, (b) foaming agent, (c) uniaxial compression test, (d) split tensile test, (e) normalized UCS, and (f) normalized tensile strength (partly modified from Liu et al, 2018). …”

“…Based on the laboratory tests and the stress-strain range considered in this investigation, FRFC can be considered as the linear elastic material with Young's modulus of 360 MPa and the Poisson's ratio of 0.1 (e.g. Liu et al, 2018).…”

“…In this study, a series of laboratory tests (uniaxial compressive strength tests and split tensile tests) are conducted to study the mechanical properties of FRFC with different contents of fiberglass. A numerical model is then developed to investigate the static performance of bridge approach filled with FRFC at the optimal content of fiberglass under different levels of foundation treatment in comparison with the traditional backfills since its dynamic behaviors have been studied by authors’ research group recently (Huang et al, 2017; Liu et al, 2018).…”

“…Ardah et al, 2017;Chen et al, 2012;Cui et al, 2019aCui et al, , 2019bLiu et al, 2019). Authors just initiated a preliminary study to investigate the dynamic responses of the transition zone of bridge approach backfilled with fiber-reinforced lightweight concrete by finite element method (Liu et al, 2018). However, the postconstruction deformation of bridge approach embankment was not considered while it is an important governing parameter in high-speed railway subgrade design.…”

Investigation of Concrete Base‐Roadbed Surface Contact Variation‐Induced Vibration Characteristics of Vehicle‐Slab Track‐Subgrade System considering Fluid‐Solid Interaction

“…Main numerical formulations modeling of the dynamic response of railway structure under moving train loads involves the finite element method and the semianalytical method [2][3][4][5][6][7][8][9]. For example, rail pad properties [10] on dynamic performance of railway track were analyzed numerically.…”