Dynamic response analysis of submerged floating tunnel under impact-vehicle load action

Luo, Gang; Zhang, Yulong; Ren, Yi; Guo, Zhengru; Pan, Shaokang

doi:10.1016/j.apm.2021.06.024

Cited by 24 publications

(9 citation statements)

References 23 publications

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“…During the operation period of SFT, vehicle load is the most common functional load and the selection of vehicle load model is critical in studying structural dynamic responses [27]. In the analysis and design of road surface dynamics, axle load is generally assumed to be evenly distributed in contact area and the size of contact area depends on contact pressure.…”

Section: Vehicle Load Modelmentioning

confidence: 99%

Research on the Dynamic Response of Submerged Floating Tunnels to Wave Currents and Traffic Load

Jiang¹,

Wu²,

Ji³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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Submerged floating tunnel (SFTs) are typically subjected to complex external environmental and internal loads such as wave currents and traffic load. In this study, this problem is investigated through a finite element method able to account for fluid-structure interaction. The obtained results show that increasing the number of vehicles per unit length enhances the transverse vibrational displacements of the SFT cross sections. Under ultimate traffic load condition, one-way and two-way syntropic distributions can promote the dynamic responses of SFTs whereas two-way reverse distributions have the opposite effect.

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Section: Vehicle Load Modelmentioning

confidence: 99%

Research on the Dynamic Response of Submerged Floating Tunnels to Wave Currents and Traffic Load

Jiang¹,

Wu²,

Ji³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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“…Although in the past decade, scholars or engineers from the world have done a lot of researches and exploration, which includes the preliminary design of engineering structures, the combination of SFT load and limit state design method, mechanical analysis and dynamic response behavior of SFTs and components , fluid-structure coupling mechanism [17,19,[35][36][37], the experimental test and study [35,[38][39][40][41][42][43][44][45][46], the behavior of SFTs under action of accidental load, such as, preliminary studies on vibration response mechanism and prevention measures under general impact load, seismic excitation, explosion and blast impacts and partial failure of anchor cables [4,[19][20][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62], and corresponding construction simulation [63], construction technologies and equipment, durability analysis, smart monitoring and early warning system of anchor cables, SFT and environment [64][65][66]. But the working behavior and mechanism of the SFT under complex sea waters is not very clear, there is a certain distance from making the specification of design and construction methods or guide for SFT etc.…”

Section: Characteristics and Research Status Of Sftmentioning

confidence: 99%

Solution to the traffic problems of long and deep water straits–smart submerged floating tunnel and its research

Xiang

Chen

Shen

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Submerged floating tunnel (SFT) is a new type of structure across long and deep water straits and waterways with good application prospects. The structure is different from the traditional large-span bridges and immersed tunnels, which can effectively avoid difficulty under the construction of bridges foundation in deep water straits and channel, the high cost of large span bridge, influence of typhoons and heavy fog et al. severe weather on the vehicle driving on the bridges, a series of technical problems confronted under the construction of immersed tunnel or tunnel excavation in complex marine geology and the deep sea and risk control and so on. This paper, in the light of the characteristics of submerged floating tunnels and the requirements of marine deep water environment, discusses some of technical challenges faced in the designing and building the SFT, points out that it is necessary to systematically study the design and load condition, the smart composite material and shape optimization, the calculation theory and method for analyzing the structural behavior, the structure safety evaluation, construction methods and key technology, and engineering risk analysis, smart monitoring, evaluation and control, code or guide for design and construction of SFT. It lays foundation for design, construction and engineering risk analysis, etc. of submerged floating tunnel across the long and deep waterways in the future.

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“…Based on the empirical calculation formula of blasting dynamic loads, Zhang [21] obtained the time history curve of the shock wave pressure on the tunnel structure, and pointed out that the engineering structure would not be damaged when the shock wave propagating from the blast to the tunnel structure was within a certain range. Luo [22] used the Galerkin method to solve the vibration differential equation using a numerical model, and the conclusion showed that the blasting center distance had a significant impact on the kinematic parameters of the suspension tunnel, i.e., the maximum displacement of the tunnel is approximately inversely proportional to the increase in the blasting center distance.…”

Section: Introductionmentioning

confidence: 99%

Influence of Blasting Disturbance on the Dynamic Stress Distribution and Fracture Area of Rock Tunnels

Liu

Yang

et al. 2023

Applied Sciences

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In order to study the dynamic stress distribution and the fracture area of rock around the tunnel under different orientations of blasting disturbance, AUTODYN finite difference method software was used to conduct numerical simulation research. Gauge monitoring points were set around the numerical model of the tunnel to conduct real-time monitoring of the stress distribution, displacement and fracture area of the tunnel. Based on the analysis of the stress wave propagation law, the following conclusions are obtained: (1) under the condition of the same blasting loads, the stress and displacement of the tunnel is relatively small when the blasting disturbance source is located above the roof, i.e., the stress state of the tunnel is relatively stable and the fracture area around the tunnel is minimal; (2) from the uniaxial stress around the tunnel and the tunnel peripheral displacement, it can be seen that the displacement caused by horizontal direction stress of the tunnel is the largest, and the deformation is mainly concentrated above the floor and at the shoulder, while the vertical wall part has almost no deformation; (3) for brittle materials such as rock, the arch-shaped stress-bearing surface is more likely to disperse stress, while the straight wall and flat floor of the tunnel cannot well disperse stress, resulting in uneven stress on the stress-bearing surface, uncoordinated deformation and ultimately, failure.

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Dynamic response analysis of submerged floating tunnel under impact-vehicle load action

Cited by 24 publications

References 23 publications

Research on the Dynamic Response of Submerged Floating Tunnels to Wave Currents and Traffic Load

Research on the Dynamic Response of Submerged Floating Tunnels to Wave Currents and Traffic Load

Solution to the traffic problems of long and deep water straits–smart submerged floating tunnel and its research

Influence of Blasting Disturbance on the Dynamic Stress Distribution and Fracture Area of Rock Tunnels

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