scholarly journals Numerical Modelling of Building Vibrations due to Railway Traffic: Analysis of the Mitigation Capacity of a Wave Barrier

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Fran Ribes-Llario ◽  
Silvia Marzal ◽  
Clara Zamorano ◽  
Julia Real
Keyword(s):  
Building Structure ◽  
Railway Transport ◽  
Negative Externalities ◽  
3D Fem ◽  
Fem Model ◽  
Foundation Slab ◽  
Railway Traffic ◽  
Vertical Vibrations ◽  
Storey Building

Transmission of train-induced vibrations to buildings located in the vicinity of the track is one of the main negative externalities of railway transport, since both human comfort and the adequate functioning of sensitive equipment may be compromised. In this paper, a 3D FEM model is presented and validated with data from a real track stretch near Barcelona, Spain. Furthermore, a case study is analyzed as an application of the model, in order to evaluate the propagation and transmission of vibrations induced by the passage of a suburban train to a nearby 3-storey building. As a main outcome, vertical vibrations in the foundation slab are found to be maximum in the corners, while horizontal vibrations keep constant along the edges. The propagation within the building structure is also studied, concluding that vibrations invariably increase in their propagation upwards the building. Moreover, the mitigation capacity of a wave barrier acting as a source isolation is assessed by comparing vibration levels registered in several points of the building structure with and without the barrier. In this regard, the wave barrier is found to effectively reduce vibration in both the soil and the structure.

Study of ground vibrations induced by railway traffic in a 3D FEM model formulated in the time domain: experimental validation

2016 ◽  
Vol 13 (5) ◽  
pp. 652-664 ◽  
Author(s):  
Jesús Fernández Ruiz ◽  
Pedro Alves Costa ◽  
Rui Calçada ◽  
Luis E. Medina Rodríguez ◽  
Aires Colaço
Keyword(s):  
Time Domain ◽  
Experimental Validation ◽  
Ground Vibrations ◽  
3D Fem ◽  
Fem Model ◽  
Railway Traffic ◽  
The Time Domain

scholarly journals Concrete wave barriers to mitigate ground vibrations induced by railway traffic: a three-dimensional numerical study

2020 ◽  
Vol 19 (3) ◽  
pp. 395-406
Author(s):  
Jesús Fernández Ruiz ◽  
◽  
Luis Medina Rodríguez
Keyword(s):  
Continuous Wave ◽  
Numerical Study ◽  
Three Dimensional ◽  
Mitigation Measures ◽  
3D Fem ◽  
Technical Literature ◽  
Fem Model ◽  
Railway Line ◽  
Railway Traffic ◽  
Efficient Measure

Continuous wave barriers are mitigation measures to reduce vibrations induced by railway traffic which have been well studied in technical literature. Nevertheless, there are not many studies about discontinuous concrete wave barriers. By this reason, in this paper continuous and discontinuous concrete wave barriers are studied and compared. With this objective, two theoretical cases with discontinuous barriers have been analysed and the results have been compared with those from both continuous barriers and without barriers cases. The study has been carried out with a dynamic numerical 3D FEM model formulated in the space/time domain, which has previously been validated by authors on the Lisbon-Oporto (Portugal) railway line. The numerical results show the discontinuous barriers with a small separation between axles (less than twice the thickness of the continuous barrier) are an efficient measure in the reduction of vibrations, reaching values of insertion loss of up to 13 dB. So, these could be a very interesting alternative to continuous barriers, in order to conjugate a somewhat lower level of reduction of vibration at a considerable lower cost.

Reinforcement of Stone Masonry Walls with Carbon Fiber Tissue and Tapes, a Case Study

2017 ◽  
Vol 747 ◽  
pp. 182-189
Author(s):  
Davor Uglešić ◽  
Ante Uglešić
Keyword(s):  
Carbon Fibers ◽  
Response Spectrum ◽  
Stone Masonry ◽  
Masonry Walls ◽  
Masonry Building ◽  
3D Fem ◽  
Fem Model ◽  
Seismic Forces ◽  
Stage Analysis

The reconstruction project of an existing masonry building will be presented in this paper. The building was erected in 1911. The building has a ground floor and three floors. Its façade is protected as cultural heritage. Due to the conversion of the building into a hotel, a lot of interventions have to be done on the existing structure, which significantly changes the properties of the structure and increases the weight of the building, and thus seismic forces. Due to structural assessment, the project was preceded by different on site structural tests. A very detailed 3D FEM model with solid elements was created on which the analysis of the structure was carried out. The results of nonlinear analysis for vertical loads, modal (eigenvalue) analysis, response spectrum analysis and push-over analysis (nonlinear construction stage analysis “sequence analysis”) will be shown. Only when carbon fibers reinforcement was included in the FEM model, the vertical loads were applied. It can be activated for earthquake forces. The comparison between the results for unreinforced and reinforced structure proves increasing carrying capacity of the stone masonry walls after reinforcement with carbon fibers was combined with the masonry walls grouting.

3D FEM model to simulate Brownian motion inside trabecular tissue from human femoral head

2021 ◽  
pp. 1-8
Author(s):  
Fabiano Bini ◽  
Andrada Pica ◽  
Simone Novelli ◽  
Raffaella Pecci ◽  
Rossella Bedini ◽  
...  
Keyword(s):  
Brownian Motion ◽  
Femoral Head ◽  
3D Fem ◽  
Fem Model

ANALYSIS AND DESIGN OF G+4 RESIDENTIAL BUILDING USING ETABS

2021 ◽  
Vol 5 (12) ◽  
Author(s):  
Chinmay Padole ◽  
Samiksha Bansod ◽  
Taniya Sukhdeve ◽  
Abhishek Dhomne ◽  
Maheshwari Nagose ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Residential Building ◽  
Shape Modelling ◽  
Analysis And Design ◽  
Design Procedures ◽  
High Rise ◽  
Building Systems ◽  
Dynamic Loadings ◽  
Storey Building

ETABS stands for Extended Three-Dimensional Analysis of Building Systems. ETABS is commonly used to analyze: Skyscrapers, concrete structures, low and high rise buildings, and portal frame structures. The case study in this paper mainly emphasizes on structural behavior of multi-storey building for different plan configurations like rectangular, C, L and I-shape. Modelling of 15-storeys R.C.C. framed building is done on the ETABS software for analysis ETABS issue, for analysis and design for building systems. ETABS features are contain powerful graphical interface coupled with unmatched modeling, analytical, and design procedures, all integrated using a common database. STAAD and ETABS both of the software are well equipped and very much capable of handling different shape of the structures, static and dynamic loadings and different material properties.

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