Foundation Settlement Response of Existing High-Speed Railway Bridge Induced by Construction of Undercrossing Roads

Wang, You; Liang, Shuquan; Huang, Changxi; Wang, Rui

doi:10.3390/su14148700

Cited by 4 publications

(2 citation statements)

References 30 publications

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“…The longitudinal and transverse reinforcements in the pier are simulated using the Hughes-Liu beam element with one integral point. The concrete is assumed to be fully bonded to the reinforcements, implemented by the keyword *CONSTRAINED_LAGRANGE_IN_SOLID [5,17]. The effect of the superstructure is considered by using the keyword *LOAD_BODY_Z.…”

Section: Fe Model Of Bridge and Rockfallmentioning

confidence: 99%

Durability Assessment Method of Hollow Thin-Walled Bridge Piers under Rockfall Impact Based on Damage Response Surface

Li¹,

Liu²,

Yang³

2022

Preprint

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Continuous rigid frame bridges across valleys are often at the risk of rockfalls caused by heavy rainfalls, earthquakes and debris flows in a mountainous country. Hollow thin-walled bridge piers (HTWBP) in valleys are exposed to the threat of the impact of accidental rockfalls. In the current research, ANSYS/LS-DYNA is used to establish a high-precision rockfall-HTWBP model. The rockfall-HTWBP model is verified against a scaled impact test of a previous research. A mesh independence test is also performed to obtained an appropriate mesh size. Based on the rockfall-HTWBP model, the impact force, damage and dynamic response characteristics of HTWBP under the rockfall impact are studied. In addition, a damage assessment criteria is proposed based on the response surface model combined with Central Composite Design method and Box-Behnken Design method. The main conclusions are as follows: 1）The impact force of rockfall has a substantial impulse characteristic, and the duration of the impulse load is approximately 0.01s. 2）The impacted surface of the pier is dominated by the final elliptic damage with the conical and strip damage areas as the symmetry axis. The cross-sectional damage mode is compression failure in the impact area and shear failure at the corner. 3）The maximum displacement occurs in the middle height of the pier. The maximum displacement increases with impact height, impact velocity and rockfall diameter and decreases with the uniaxial compressive strength of the concrete. 4) The initial impact velocity and diameter of the rockfall are the most significant parameters affecting the damage indices. In addition, a damage assessment method with a damage zoning diagram based on the response surface method is established for the fast assessment of the damage level of impacted HTWBP.

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Section: Fe Model Of Bridge and Rockfallmentioning

confidence: 99%

Durability Assessment Method of Hollow Thin-Walled Bridge Piers under Rockfall Impact Based on Damage Response Surface

Li¹,

Liu²,

Yang³

2022

Preprint

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“…Liu, J. et al [5] studied the causes of a settlement disease of the double-pillar pier foundation of a newly built highway bridge and found that an insufficient bearing capacity and pile body defects caused an uneven settlement of the pile foundation. Wang, Y. et al [6] established the underpass highway model of a high-speed railway bridge by the finite element analysis method and analyzed the settlement between the highway and the bridge. Zhang et al [7] conducted a numerical simulation study and believed that the shield tunneling technology used in tunnel construction under existing bridges had little influence on the settlement of the existing bridges.…”

Section: Introductionmentioning

confidence: 99%

Study on Numerical Simulation of Arch Mechanism of Bridge Pile Foundation

Qu,

Han,

Tang

et al. 2024

Buildings

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Bridges are situated in a complex area with geological conditions that are challenging for engineering. It has been observed that certain pile foundations of bridges have been uplifted to varying degrees by up to 309 mm. This has a significant impact on the bridge’s operation and driving safety. The causal mechanism of the bridge pile foundation arch is analyzed through a theoretical analysis and a Plaxis 3D (v.2013) finite element software simulation. The influence of the ground stress and goaf on the bridge pile foundation under different working conditions is studied. The findings indicate that the uplift of the bridge pile foundation due to an equivalent ground stress is the largest, reaching approximately 300 mm in the bridge valley area. Additionally, the uplift of the non-bridge area in the goaf is greater than that of the bridge pile foundation. These results suggest that ground stress is the primary cause of the arching of a bridge pile foundation.

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Effect of pier bearing construction on nearby high-speed rail line bridges

Gong,

Yao

2024

Vib. proced.

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In order to analyze the impact of the new pier bearing platform construction on the bridge section adjacent to the high-speed railway line, a new pier bearing platform project adjacent to the high-speed railway line in the soft soil area of the Yangtze River Delta is taken as the background of the project, and the finite element software Plaxis 3D is used to study the impact of the pier bearing platform construction on the bridge section adjacent to the high-speed railway line, and to analyze the effect of distance on the horizontal displacement and settlement of the bridge foundation soil body. The neighboring high-speed rail line bridge is displaced horizontally toward the foundation, with the maximum horizontal displacement of 1.5 mm and the maximum settlement of 5.5 mm; the existing pier bearing platforms are also displaced in the same direction, with the maximum horizontal displacement of 2.7 mm and the maximum settlement of 5.4 mm, and the pier bearing platforms in the middle are affected the most.

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Foundation Settlement Response of Existing High-Speed Railway Bridge Induced by Construction of Undercrossing Roads

Cited by 4 publications

References 30 publications

Durability Assessment Method of Hollow Thin-Walled Bridge Piers under Rockfall Impact Based on Damage Response Surface

Durability Assessment Method of Hollow Thin-Walled Bridge Piers under Rockfall Impact Based on Damage Response Surface

Study on Numerical Simulation of Arch Mechanism of Bridge Pile Foundation

Effect of pier bearing construction on nearby high-speed rail line bridges

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