Modeling a Halfspace with Tunnel using a Coupled Integral Transform Method – Finite Element Method Approach

Hackenberg, M.; Müller, Gerhard

doi:10.1002/pamm.201510185

Cited by 3 publications

(3 citation statements)

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“…Furthermore, only 3D models can adequately capture relevant bending and torsional modes. Nevertheless, the use of high-fidelity and complex hybrid models (see Figure 2a) requires significant computational resources and expertise, as highlighted in [12,[34][35][36]. Although this method provides the important representation of the SSSI under discussion, its practical implementation is associated with several challenges and has not yet become established in construction practice.…”

Section: Development Of Simplified Approachesmentioning

confidence: 99%

The Dynamic Characteristics of Railway Portal Frame Bridges: A Comparison between Measurements and Calculations

Heiland,

Stempniewski,

Stark

2024

Applied Sciences

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Railway bridges are subjected to significant dynamic loads. A numerical model of the bridge structure that captures its dynamic characteristics as accurately as possible is essential for the simulation of train crossings. However, most existing Calculation Models either do not consider the dynamic interaction between the structure and the soil, known as the soil–structure interaction (SSI), or give it only secondary importance. As a result, the accuracy of the predicted dynamic characteristics is affected. This paper illustrates how the dynamic interactions of abutments impact the portal frame bridge’s SSI. This influence prompts the question of incorporating the frequency-dependent influence of the structure–soil–structure interaction (SSSI) into the modelling process. We propose a conservative estimation of the frequency range influenced by the shear wave interference of the SSSI and recommend using it as an application limit in the development of computational models. Based on this estimation, a Calculation Model is presented. In this approach, the SSI is considered using the well-known quasi-static spring–damper method from foundation vibration analysis, adhering to limitations based on the SSSI. For the application of the presented Calculation Model, four concrete portal frame bridges with spans between 9 m and 17 m along the high-speed line from Nuremberg to Munich, Germany, are investigated by analyzing the dynamic characteristics and comparing them with the prediction of the proposed numerical Calculation Model. The presented method shows good calculation accuracy.

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Section: Development Of Simplified Approachesmentioning

confidence: 99%

The Dynamic Characteristics of Railway Portal Frame Bridges: A Comparison between Measurements and Calculations

Heiland,

Stempniewski,

Stark

2024

Applied Sciences

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“…where c p and c s are the compressional and shear wave velocity respectively and k x and k y are the horizontal wave numbers. One can demonstrate that the potentialψ z can be set to zero, still maintaining the complete correct 3D solution [6]. The displacements in the image space can be obtained as:…”

Section: Three-dimensional Propagation Of Seismic Wavesmentioning

confidence: 99%

Hybrid Frequency-Time Domain Method for Three-Dimensional Seismic Analyses of Nonlinear Soils

Taddei¹,

Nguyen²,

Müller³

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…However a great number of these studies consider only two dimensional problems and there exists only a small number of papers analyzing 3D problems. Furthermore, the applied forces are taken as point loads which do not reect real life problems encountered in modern engineering applications such as operation of high speed trains ( [5], [6]), underground railway tunnels ( [7]), bridge constructions ( [8]), etc.…”

Section: Introductionmentioning

confidence: 99%

Response of a 3D elastic half-space to a distributed moving load

Ege¹,

Şahin²,

Erbaş³

2017

HJMS

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The dynamic eect of an out of plane distributed moving load on the surface of an elastic half-space is considered. The problem is formulated in terms of a hyperbolic-elliptic asymptotic model for a moving load where the trajectory and the distribution of the load are taken to be orthogonal. Steady-state equations are written in terms of a moving coordinate system. The near-resonant solutions are, then, obtained for sub and super-Rayleigh cases taking into account the causality principle. Numerical results of displacement components are presented for various values of the distribution parameter.

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Modeling a Halfspace with Tunnel using a Coupled Integral Transform Method – Finite Element Method Approach

Cited by 3 publications

References 0 publications

The Dynamic Characteristics of Railway Portal Frame Bridges: A Comparison between Measurements and Calculations

The Dynamic Characteristics of Railway Portal Frame Bridges: A Comparison between Measurements and Calculations

Hybrid Frequency-Time Domain Method for Three-Dimensional Seismic Analyses of Nonlinear Soils

Response of a 3D elastic half-space to a distributed moving load

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