Article
Engineering, Civil
J. C. Sanchez-Quesada, A. Romero, P. Galvin, E. Moliner, M. D. Martinez-Rodrigo
Summary: This work analyzes the vibratory response of High-Speed multi-track railway bridges with simply-supported spans. It investigates the influence of three often neglected geometrical aspects in numerical models used to evaluate traffic safety in these structures: deck obliquity, presence of transverse diaphragms, and coupling of simply-supported spans through the ballast track layer. The influence is analyzed by correlating a detailed numerical model with experimental measurements on an in-service railway bridge. The analysis considers different levels of deck obliquity, diaphragm configurations, and the number of successive spans.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Ilaria Grossoni, William Powrie, Antonis Zervos, Yann Bezin, Louis Le Pen
Summary: The geometry of a ballasted railway deteriorates over time due to plastic settlement of the track-bed, which is difficult to predict accurately. Current empirical equations do not fully reflect the behavior of soil subgrades in cyclic loading, leading to the development of a semi-analytical approach to calculate plastic settlements more effectively. This new model is able to reproduce observed aspects of railway track settlement based on known behavior of soils and ballast in cyclic loading.
TRANSPORTATION GEOTECHNICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Junhua Xiao, Lihua Xue, De Zhang, Siqi Sun, Yingqi Bai, Jin Shi
Summary: This study developed a coupling program of discrete element method (DEM) and finite element method (FEM) to investigate stress concentration at the interface between crushed ballast and soil subgrade. A new interface element and an adaptive volume coupling algorithm were proposed for the DEM-FEM coupling simulation. The research analyzed the change in interface contact stress distribution during the penetration of ballast particles into the subgrade soil. Moreover, the study provided a more accurate approach to calculate the interface stress between ballast and subgrade.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Construction & Building Technology
Till Heiland, Marius Haegle, Theodoros Triantafyllidis, Lothar Stempniewski, Alexander Stark
Summary: This paper discusses the stiffness of ballast in railway bridges and proposes a method to determine the ballast stiffness based on material properties. The research shows that the ballast stiffness does not significantly affect the overall bending stiffness.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Civil
J. Chorda-Monsonis, A. Romero, E. Moliner, P. Galvin, M. D. Martinez-Rodrigo
Summary: This study investigates the influence of ballasted track on the dynamic behavior of single-track railway bridges. Through a sensitivity analysis, it is found that the mobilized ballast shear transfer mechanism has a notable influence on the structures' dynamic response, especially for the shortest girder bridges.
ENGINEERING STRUCTURES
(2022)
Article
Environmental Sciences
Jing Hu, Linlian Jin, Shujing Wu, Bin Zheng, Yue Tang, Xuezheng Wu
Summary: The increasing frequency of extreme rainfall leads to a rise in groundwater levels in coastal areas, significantly affecting high-speed railway operations. This study developed a model to analyze the impact of rising groundwater levels on the critical velocity and vibration responses of high-speed railways. The findings reveal a decrease in critical velocity, increased deformations, and intensified vibration effects as groundwater levels rise. Effective waterproofing is emphasized as crucial in controlling track vibrations.
Article
Automation & Control Systems
Amelie Zeller, Spasena Dakova, Charlotte Stein, Michael Boehm, Gennaro Senatore, Arka P. P. Reksowardojo, Lucio Blandini, Oliver Sawodny, Cristina Tarin
Summary: This article proposes a state and disturbance estimator (SDE) for bridge structures based on a moving point load train model and estimating the average train axle mass. The proposed SDE is systematically tested through simulations and shows good estimability. A linear quadratic regulator is designed and combined with the SDE to evaluate the closed-loop performance for damping the bridge vibrations during train crossing.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Engineering, Geological
Mathias Tolomeo, Glenn R. McDowell
Summary: This paper assesses two different methods for modeling real particle shapes in 3D discrete element method (DEM) simulations and applies them to triaxial tests on railway ballast. The results show that using clumps can achieve higher shear strength closer to the experimental response. A micromechanical analysis reveals the influence of particle shape on the mechanics, particularly the concave shape. Additionally, the combined effect of particle shape and interparticle friction coefficient on shear strength is evaluated.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Engineering, Multidisciplinary
Raed Alrdadi, Michael H. Meylan
Summary: This study focused on the impact of floods on railway ballast damage. A model was developed to analyze the effects of water flow on railway ballast, showing that randomness in permeability increases the outward flow and free boundaries significantly change flow characteristics.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Engineering, Mechanical
Andrew Bunce, David Hester, Su Taylor, James Brownjohn, Farhad Huseynov, Yan Xu
Summary: Bridge displacement is a valuable data signal for bridge management, and recent developments in image processing have enabled low-cost, camera-based measurements. However, challenges such as camera installation and data management need to be addressed. This paper proposes a filter-free approach and demonstrates its robustness through experiments.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Civil
Dan Li, Sakdirat Kaewunruen, Ruilin You, Ping Liu
Summary: This article presents new findings on predicting fatigue lives of prestressed concrete sleepers under cyclic loads, with extensive numerical, analytical, and experimental investigations. It also introduces theoretical fatigue analysis methods for benchmarking. The insights from this study will improve design flexibility and maintenance criteria for railway sleepers.
Article
Engineering, Chemical
Mathias Tolomeo, Glenn R. McDowell
Summary: In the Discrete Element modelling of soils, realistic description of the contact response is crucial for investigating small strain ranges. Recent experimental tests show that classic contact models fail to reproduce certain mechanical features, especially when roughness is significant. This study implements these experimental observations in a DEM model and highlights their influence on small strain stiffness.
Article
Mathematics, Interdisciplinary Applications
Xianmai Chen, Yi Deng, Nan Chen, Yunqiang Deng
Summary: This paper uses parallel bonded spherical elements to simulate the concrete sleeper structure and rigid clusters with realistic shape to simulate ballast particles in order to analyze the dynamic response of sleeper and ballast bed under heavy haul railway train load. The results show that the displacement and bending deformation of the sleeper are influenced by the train speed, and the stress and displacement of the ballast particles are affected by the depth of the ballast bed.
COMPUTATIONAL PARTICLE MECHANICS
(2023)
Article
Engineering, Civil
Lizhong Jiang, Yongjian Zuo, Wangbao Zhou, Jian Yu, Kang Peng, Yali Zheng
Summary: This study establishes a nonlinear system model of high-speed railway bridges using ANSYS finite element analysis software and investigates the seismic-induced track irregularities. The results show that the alignment irregularity is significant after earthquakes, while the vertical, cross-level, and gauge irregularities can be ignored. The findings provide important guidance for the design and construction of high-speed railway bridges.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Chemistry, Multidisciplinary
Per Gunnvard, Hans Mattsson, Jan Laue
Summary: No significant difference in mechanical behavior was found between triangular and square pile arrangements through FE simulations. This is of importance for improving design guidelines and reducing the number of piles.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Civil
F. H. Kemper, M. Feldmann
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2019)
Article
Engineering, Civil
Hetty Bigelow, Benno Hoffmeister, Markus Feldmann
Article
Energy & Fuels
Robert Fontecha, Frank Kemper, Markus Feldmann
Article
Construction & Building Technology
Markus Feldmann, Helen Bartsch, Ulrike Kuhlmann, Karl Drebenstedt, Thomas Ummenhofer, Benjamin Seyfried
Article
Construction & Building Technology
Markus Feldmann, Dirk Schaefer
Article
Engineering, Civil
Hetty Bigelow, Markus Feldmann, Benno Hoffmeister
Article
Construction & Building Technology
Herve Degee, Benno Hoffmeister, Yves Duchene
Article
Engineering, Civil
Rajarshi Das, Alper Kanyilmaz, Mael Couchaux, Benno Hoffmeister, Herve Degee
ENGINEERING STRUCTURES
(2020)
Article
Engineering, Geological
Dimitrios Vamvatsikos, Konstantinos Bakalis, Mohsen Kohrangi, Stella Pyrza, Carlo Andrea Castiglioni, Alper Kanyilmaz, Francesco Morelli, Aurel Stratan, Mario D'Aniello, Luis Calado, Jorge Miguel Proenca, Herve Degee, Benno Hoffmeister, Marius Pinkawa, Pavlos Thanopoulos, Ioannis Vayas
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2020)
Article
Construction & Building Technology
Frank Kemper, Mirko Friehe, Robert Fontecha, Markus Feldmann
Article
Construction & Building Technology
Rajarshi Das, Carlo A. Castiglioni, Mael Couchaux, Benno Hoffmeister, Herve Degee
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2020)
Article
Engineering, Mechanical
Helen Bartsch, Benno Hoffmeister, Markus Feldmann
INTERNATIONAL JOURNAL OF FATIGUE
(2020)
Article
Construction & Building Technology
Helen Bartsch, Simon Schaffrath, Yidu Di, Benno Hoffmeister, Markus Feldmann, Sebastian Muenstermann
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2020)
Article
Construction & Building Technology
Lara Bittner, Benno Hoffmeister, Markus Kuhnhenne
Summary: This paper presents an ongoing research project that investigates the performance of lightweight metal facade elements under in-plane loading in order to evaluate their cyclic behavior, dissipation capacity, and functionality during seismic events. Preliminary findings suggest that metal wall and roof elements contribute to the stiffening of the overall structure, changing its eigen period compared to the primary structure, potentially leading to increased seismic loads applied according to the response spectrum method. Based on these findings, a behavior-based approach considering the contribution of lightweight metal building envelopes can be developed to determine the enhanced resilience of structures and the impact of a damaging earthquake on the performance of the building envelope.
Article
Engineering, Civil
Renbing An, Jiacong Yuan, Yi Pan, Duhang Yi
Summary: Traditional timber structures built on sloped land are more susceptible to seismic damage compared to structures built on flat land. The upper portion of the structure is found to be the weak point on sloped land, with potential issues such as tenon failure and column foot sliding.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Elyas Bayat, Federica Tubino
Summary: The current design guidelines for assessing floor vibration performance do not consider the influence of variability in the walking path on the dynamic response of floors. This study investigates the dynamic response of floors under a single pedestrian walking load, taking into account the randomness of the walking path and load. The effectiveness of the current guidelines in predicting floor response is critically assessed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Gao Ma, Chunxu Hou, Hyeon-Jong Hwang, Linghui Chen, Zhenhao Zhang
Summary: Minimizing earthquake damage and improving repair efficiency are the main principles of resilient structures. This study proposed a repairable column with UHPC segments and replaceable energy dissipaters. The test results showed that the columns with UHPC segments and replaceable dissipaters exhibited high strength, deformation capacity, and energy dissipation.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Kartheek S. M. Sonti, Pavan Kumar Penumakala, Suresh Kumar Reddy Narala, S. Vincent
Summary: In this study, the compressive behavior of alumina hollow particles reinforced aluminum matrix syntactic foams (AMSF) was investigated using analytical, numerical, and experimental methods. The results showed that the FE solver ABAQUS could accurately predict the elastic and elastio-plastic behavior of AMSFs. The study also suggested that FE models have great potential in developing new materials and composites under compression loading.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Zheqi Peng, Xin Wang, Zhishen Wu
Summary: In this study, the statistical modeling of fiber-reinforced polymer (FRP) cables using the classic fiber bundle model is explored. The study considers important features of large-scale multi-tendon FRP cables, such as initial random slack and uneven tensile deformation among tendons. A parametric study and reliability analysis are conducted to predict the load-displacement relation and design thousand-meter-scale FRP cables. The study emphasizes the relation between the reliability index beta of the cable and the safety factor gamma of the FRP material.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Yanchao Shi, Shaozeng Liu, Ye Hu, Zhong-Xian Li, Yang Ding
Summary: This paper introduces a damage assessment method for reinforced concrete (RC) columns under blast loading, using modal parameter measurement as the evaluation index. The validity of the proposed method is validated through numerical and experimental analysis. The results show that this modal-based damage assessment method is applicable for non-destructive evaluation of blast-induced damage of RC columns.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Xiaolin Zou, Maosheng Gong, Zhanxuan Zuo, Qifang Liu
Summary: This paper proposes an efficient framework for assessing the collapse capacity of structures in earthquake engineering. The framework is based on an accurate equivalent single-degree-of-freedom (ESDOF) system, calibrated by a meta-heuristic optimization method. The proposed framework has been validated through case studies, confirming its accuracy and efficiency.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jie Hu, Weiping Wen, Chenyu Zhang, Changhai Zhai, Shunshun Pei, Zhenghui Wang
Summary: A deep learning-based rapid peak seismic response prediction model is proposed for the most common two-story and three-span subway stations. The model predicts the peak seismic responses of subway stations using a data-driven approach and limited information, achieving good predictive performance and generalization ability, and demonstrating significantly higher computational efficiency compared to numerical simulation methods.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jin Ho Lee, Jeong-Rae Cho
Summary: A simplified model is proposed to estimate the earthquake responses of a rectangular liquid storage tank considering the fluid-structure interactions. The complex three-dimensional structural behavior of the tank is represented by a combination of fundamental modes of a rectangular-ring-shaped frame structure and a cantilever beam. The system's governing equation is derived, and earthquake responses such as deflection, hydrodynamic pressure, base shear, and overturning moment are obtained from the solution.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
W. J. Lewis, J. M. Russell, T. Q. Li
Summary: The work discusses the key features and advantages of optimal 2-pin arches shaped by statistically prevalent load and constant axial stress. It extends the design space of symmetric arches to cover asymmetric forms and provides minimum values of constant stress for form-finding of such arches made of different materials. The analysis shows that constant stress arches exhibit minimal stress response and have potential implications for sustainability and durability of future infrastructure.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Wen-ming Zhang, Han-xu Zou, Jia-qi Chang, Tian-cheng Liu
Summary: Saddle position is crucial in the construction and control of suspension bridges. This study proposes an analytical approach to estimate the saddle positions in the completed bridge state and discusses the calculation under different definitions. The relationship between the saddle position and the tower's centerline is analyzed, along with the eccentric compression of the tower. The feasibility of the proposed method is verified through a real-life suspension bridge.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Shaise K. John, Alessio Cascardi, Yashida Nadir
Summary: This study experimentally investigated the use of TRM material for reinforcing concrete columns. The results showed that increasing the number of textile layers effectively increased the axial strength. Additionally, the choice of fiber type and hybrid textile configuration also had a significant impact on strength improvement. A new design model that considers the effects of both the confining matrix and textile was proposed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chandrashekhar Lakavath, S. Suriya Prakash
Summary: This study experimentally investigated the shear behavior of post-tensioned UHPFRC girders, considering factors such as prestress level, fiber volume fraction, and types of steel fibers. The results showed that increasing prestress and fiber dosage could enhance the ultimate load-carrying capacity of the girders, reduce crack angle, and increase shear cracking load.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Vahid Goodarzimehr, Siamak Talatahari, Saeed Shojaee, Amir H. Gandomi
Summary: In this paper, an Improved Marine Predators Algorithm (IMPA) is proposed for size and shape optimization of truss structures subject to natural frequency constraints. The results indicate that IMPA performs better in solving these nonlinear structural optimization problems compared to other state-of-the-art algorithms.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chun-Xu Qu, Jin-Zhao Jiang, Ting-Hua Yi, Hong-Nan Li
Summary: In this paper, a computer vision-based method is proposed to monitor the deformation and displacement of building structures by obtaining 3D coordinates of surface feature points. The method can acquire a large number of 3D coordinates in a noncontact form, improve the flexibility and density of measurement point layout, and is simple and cost-effective to operate.
ENGINEERING STRUCTURES
(2024)
