Dynamic modelling of bridge approach slabs under moving loads

Al-abboodi, Ihsan; Al-Salih, Osamah; Dakhil, Ammar

doi:10.1016/j.jksues.2019.12.003

Cited by 6 publications

(3 citation statements)

References 3 publications

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“…To study the peculiarities of the dynamic impact of moving loads on bridge structures in modern conditions, existing approaches become insufficient, and dynamic calculation methods need to be improved and developed. All this confirms the importance and relevance of solving the problem of changing the dynamic responses of transport structures to moving loads [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 55%

Beam vibration due movement of overweight cargoes on reinforced concrete bridges at different ground conditions

Berdibaev,

Mardonov,

Nishonov

et al. 2023

E3S Web of Conf.

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The article deals with the vibrations of a reinforced concrete bridge whose supports are located in soils with different properties under the action of overweight cargoes. The assumption is made that the structure deformed in the elastic zone when Hooke's law is valid. The Fourier method is used to solve the problem. The results are presented as graphs of changes in stresses and deflections along the coordinate and time, which are accompanied by analysis. When a concentrated load is applied, depending on the stiffness coefficient of the connection between the supports and the ground, stresses exceeding the limit load can occur in the middle of the beam cross-section. Thus, in the calculations, it is necessary to consider the nature of the interaction of the supports with the surrounding soils when calculating the beams for the action of moving loads.

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Section: Introductionmentioning

confidence: 55%

Beam vibration due movement of overweight cargoes on reinforced concrete bridges at different ground conditions

Berdibaev,

Mardonov,

Nishonov

et al. 2023

E3S Web of Conf.

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“…The study compared field survey results with the numerical model. Al-Abboodi et al [15] used 3D dynamic analysis to study the approach slab system, utilizing the Plaxis 3D software with the Mohr-Coulomb model. They considered several soil, slab, and vehicle parameters to examine slab behavior.…”

Section: Introductionmentioning

confidence: 99%

A Parametric Study of Bridge Approach Slabs under Vehicle Loads Using SAP2000

Al-Hashmi,

Al-Hussein,

Al-Abboodi

2023

MMEP

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The transitional zone between a bridge and its adjoining roadway, known as the bridge approach, frequently experiences differential settlement. This study employs the threedimensional finite element software SAP2000 V22 to rigorously examine the performance of bridge approach slabs under vehicular loads, with a particular focus on the interaction between the slabs and embankment settlement. Bridge approach slabs and soil are modelled using shell and solid elements, respectively, with the soil characterized by the Drucker-Prager material model. A comprehensive investigation is undertaken to evaluate the effects of various soil and slab parameters on the system's performance, including slab thickness, slab length, approach slab restriction, fill material thickness, and soil's elastic modulus. Furthermore, a sensitivity analysis considering different boundary conditions is also conducted. The outcomes of the analysis include predicted slab deformations and bending moments under design traffic loads. Notably, a correlation is found between increased settlement and approach slab length at the slab's unrestricted boundary, particularly for soils of lower stiffness. The results also suggest that enhancing the compacted fill material thickness and the soil's elastic modulus can reduce slab deflection. The boundary condition and thickness of the slab are identified as key determinants of settlement values. These findings offer valuable insights for engineering professionals aiming to optimize bridge approach slab design, thereby boosting structural integrity and durability.

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“…The authors accounted for differential settlements between the approach slab and roadway pavement and soil washouts near the abutment joint. Most recently, Al-Abboodi et al (2021) investigated the performance of the approach slab under moving vehicles by a 3D dynamic analysis. In which, the slab is modeled using plate elements while the Mohr-Coulomb material model is adopted for the base, subbase, and subgrade soils.…”

Section: Introductionmentioning

confidence: 99%

Incorporating the effect of approach slab to the dynamic response of simply supported bridges under moving vehicle

al.¹

2022

Int. j. adv. appl. sci.

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Reinforced concrete approach slabs serve as a transitional component between the roadway pavement and the bridge deck. Due to the settlement of the embankment soil, the slab is bent, and its slope grade will be suddenly changed resulting in bumps at both ends of the deck; this may increase the dynamic response of bridges induced by the interaction with moving vehicles. In addition, the presence of such bumps not only causes an uncomfortable ride but also exhibits a potentially hazardous condition to the traffic. Since most of the studies have considered either the interaction model between the slab and soil or between the bridge and moving load; in this study, a novel finite element model is established for the bridge under traffic loads, considering the presence of the approach slab that is simulated as a beam rested on a dynamic soil model. The separated models of the approach slab and bridge deck are validated by previous studies and demonstrate their accuracy in predicting the dynamic response of the bridge-vehicle system. A comprehensive parametric study is then performed considering the effect of the soil stiffness, the stiffness of the shear layer of the foundation, and the approach slab length. The results of the study are useful criteria for the practice design of the approach slab in different embankment conditions.

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Dynamic modelling of bridge approach slabs under moving loads

Cited by 6 publications

References 3 publications

Beam vibration due movement of overweight cargoes on reinforced concrete bridges at different ground conditions

Beam vibration due movement of overweight cargoes on reinforced concrete bridges at different ground conditions

A Parametric Study of Bridge Approach Slabs under Vehicle Loads Using SAP2000

Incorporating the effect of approach slab to the dynamic response of simply supported bridges under moving vehicle

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