Article
Metallurgy & Metallurgical Engineering
A. Y. Dakhel, M. Gaspar, Zs. Koncsik, J. Lukacs
Summary: The main objective of our research is to collect data for pipeline integrity management tasks, specifically for the pipeline integrity management system (PIMS), in order to assist pipeline operators in making decisions. The research examines the reserves of girth welds after long-term operation and considers whether repairs or replacements are necessary for girth welds with defects. The study involves full-scale pipeline sections and conducts fatigue and burst tests to assess the reliability of girth welds.
WELDING IN THE WORLD
(2023)
Article
Engineering, Civil
Wenchen Dong, Colin M. Rose, Julia A. Stegemann
Summary: The demolition of buildings generates a large amount of secondary timber, which can be utilized as a feedstock for cross-laminated timber (CLT) production, meeting the increasing demand for wood products in the future. Through experiments and predictions, it is demonstrated that secondary timber can be used effectively in the production of CLT/CLST.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Marine
Michal Orych, Sofia Werner, Lars Larsson
Summary: Verification and Validation of CFD simulations of delivered power are conducted for a single screw cargo vessel, showing a comparison error of about 1% with sea trial data, significantly lower than experimental uncertainty.
Article
Engineering, Mechanical
G. Diana, E. Sabbioni, C. Somaschini, D. Tarsitano, P. Cavicchi, M. Di Mario, L. Labbadia
Summary: This study investigates low-speed derailments of freight trains through experimental full-scale tests, finding that the activation of the derailment detector is always triggered by impacts between the axle-box and the rail, and that derailment detectors must be installed at both ends of each wagon.
VEHICLE SYSTEM DYNAMICS
(2022)
Article
Construction & Building Technology
Xiuyun Gao, Rong Yi, Lingquan Zhang, Xiao Jiang, Jiaxiang Li
Summary: With the rapid development of Ultra-High Voltage (UHV) transmission lines, studying the performance of UHV transmission towers has become necessary. Through full-scale tests and comparison with calculation results, it was found that bolt slippage increases the displacement of the tower, but it can be corrected by residual displacement. Additionally, the new joint design exhibits good mechanical performance.
Article
Engineering, Geological
C. Amendola, F. de Silva, A. Vratsikidis, D. Pitilakis, A. Anastasiadis, F. Silvestri
Summary: This paper discusses dynamic foundation impedance functions calculated from full-scale field tests on soil-structure interaction, showing that non-destructive tests like ambient noise tests can effectively be used to derive impedance functions and that uncertainties can be minimized by using resonance frequency to calibrate flexible-base models for soil-structure interaction analyses.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Civil
Martina Bernardi, Nadia Baldassino, Riccardo Zandonini, Arturo di Gioia
Summary: This paper presents a study on industrial steel storage pallet racks, which were subjected to full-scale tests. The behavior and failure modes of the racks were investigated, and the results were discussed.
Article
Construction & Building Technology
Joo-Ha Lee, Doo-Yeol Yoo
Summary: A study was conducted on the pumping of low-viscosity ultra-high-strength concrete, revealing significant changes in the properties of fresh concrete during the pumping process. Furthermore, the pumpability of the low-viscosity UHSC was evaluated by measuring pipe pressure and discharge.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Engineering, Civil
Martin Horacek, Thomas Gernay, Marcela Karmazinova, Marek Hladik, Zbynek Poffel, Ondrej Pesek, Ivan Balazs
Summary: As the use of cold-formed steel profiles for load-bearing structural systems increases, their fire design needs specific attention due to their thin-walled nature. This article describes two standard fire resistance tests on full-scale light gauge steel frame floors made of cold-formed steel, providing new data on the response of unprotected cold-formed steel floor systems subjected to fire.
THIN-WALLED STRUCTURES
(2023)
Article
Multidisciplinary Sciences
Adam Wysokowski
Summary: This paper describes the experiments that were conducted to analyze the displacement and stress of buried flexible structures made with different technologies. The results show that despite variations in backfill layer thickness and increased load, the structures remained safe and stable.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Civil
S. Negri, G. Tomasini, P. Schito, D. Rocchi
Summary: The train slipstream, which is the velocity of air induced by the train, is a significant aerodynamic effect that directly affects the safety of passengers on the platform and track workers along the railway line. While there have been numerous studies on this phenomenon in open fields, such as the development of specific EU standards like EN 14067-4 and TSI, limited research has been conducted on analyzing the train slipstream in confined spaces like tunnels. This study focuses on studying the effects of train passage on air flow speed through full-scale experimental campaigns, analyzing different train and infrastructure parameters and simulating scenarios of ordinary railway traffic with a stationary train inside the tunnel while another train passes.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2023)
Article
Mechanics
F. Ballo, M. Carboni, G. Mastinu, G. Previati
Summary: The paper discusses the experimental assessment of the fatigue life of wires for spring construction, comparing tests on full-scale wires with those on standard small-scale specimens. Results show that the effectiveness of manufacturing processes and the impact of surface finishing on fatigue life can be evaluated through full-scale wire testing.
Article
Construction & Building Technology
Gang Jiang, Cheng Lin, Dong Shao, Mian Huang, Hongwei Lu, Gen Chen, Chenfeng Zong
Summary: Different levels of mechanical loading affect the response of energy piles under cyclic thermal loading, and the thermal cycle history also affects the rate of pile settlement caused by mechanical load. Driven energy piles respond differently to thermal cycles compared to bored energy piles due to the effect of pile construction.
ENERGY AND BUILDINGS
(2021)
Article
Engineering, Geological
David J. Richards, William Powrie, Anthony P. Blake
Summary: Pile foundations for masts supporting overhead line equipment (OLE) on railways in Western Europe have traditionally been designed using empirical formulae derived from tests carried out in the 1950s under the auspices of the Union Internationale des Chemins de fer (UIC). Recent application in the UK of ostensibly more analytical approaches led to significantly increased pile lengths, which contributed to the high-profile cost over-run on the Great Western electrification programme. Full-scale field tests were carried out to investigate the deformation mechanisms of piles of different lengths and their performance under expected in-service loads. The results provide valuable insights and show that the empirical OLE master index (OLEMI) method and Eurocode 7 partial factors on load and undrained shear strength are likely to be sufficient to meet serviceability requirements for standard structures.
Article
Engineering, Environmental
Riikka Matala, Mikko Suominen
Summary: This paper explores the prediction of vessel resistance in brash ice channels and points out the limitations in the current model scale test guidelines. By investigating the relationship between brash ice properties and vessel resistance, the study proposes methods to improve test procedures and prediction quality.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2022)
Article
Mechanics
K. Somlo, B. H. Frodal, C. V. Funch, K. Poulios, G. Winther, O. S. Hopperstad, T. Borvik, C. F. Niordson
Summary: The mechanical anisotropy created by additive manufacturing (AM) is investigated through crystal plasticity simulations, using periodic representative volume elements specific to each material and calibrated against tensile tests.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Lars Edvard Blystad Daehli, Cihan Tekoglu, David Morin, Tore Borvik, Odd Sture Hopperstad
Summary: Three different micromechanically-based computational models for fracture in porous ductile solids are compared and assessed. The results show that the failure loci strongly depend on the computational model and failure criterion chosen.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Chemistry, Physical
Kristoffer A. Brekken, Ole Vestrum, Sumita Dey, Aase Reyes, Tore Borvik
Summary: Sandwich structures consisting of thin skins encapsulating a cellular core are excellent energy absorbents. This study investigated the ballistic impact response of an aluminium foam with a complex cell structure through experimental and numerical methods. The results showed that X-ray Micro Computed Tomography (XRMCT) data are important for optimizing and improving the behavior of inhomogeneous foams.
Article
Orthopedics
Annette Fisker, Henning Langberg, Tom Petersen, Ole Steen Mortensen
Summary: The study concluded that a 12-week coordinated work oriented multidisciplinary rehabilitation intervention did not significantly impact sickness absence, disability, pain, or health related quality of life compared to usual care. Both groups showed improvements in various outcomes, with no statistically significant differences between them.
BMC MUSCULOSKELETAL DISORDERS
(2022)
Article
Engineering, Aerospace
R. M. Faergestad, J. K. Holmen, T. Berstad, T. Cardone, K. A. Ford, T. Borvik
Summary: Hypervelocity impacts (HVIs) caused by orbital debris pose an increasing threat to spacecraft in low Earth orbit, highlighting the need for effective shielding. This study used a coupled finite element-discrete element method (FEM/DEM) to model HVIs on debris shields. Experimental data was used to validate the results, and simulations were conducted to study the formation of debris clouds and investigate key model parameters.
Article
Engineering, Mechanical
Benjamin Stavnar Elveli, Ole Vestrum, Knut Ove Hauge, Torodd Berstad, Tore Borvik, Vegard Aune
Summary: This study evaluates the effect of complex, partially confined detonations on thin steel plates with realistic pre-formed defects. It is found that target plates with pre-cut circular holes show better fracture resistance under blast loading compared to plates with initial ballistic impact.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Mechanics
Vetle Espeseth, David Morin, Tore Borvik, Odd Sture Hopperstad
Summary: This paper presents a gradient-based non-local GTN model to solve the pathological mesh dependency problem in finite element simulation of strain-softening materials. The porosity is averaged using an implicit gradient model, and the gradient model is implemented in Abaqus/Explicit. The proposed approach can effectively remedy the mesh dependency problem and accurately predict the fracture mode of the material.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Materials Science, Multidisciplinary
Lars Edvard Blystad Daehli, Joakim Johnsen, Torodd Berstad, Tore Borvik, Odd Sture Hopperstad
Summary: When metals undergo plastic deformation through dislocation motion, a portion of the plastic work is stored in the material while the rest is dissipated as heat. This study aims to calculate the Taylor-Quinney coefficient as a function of plastic deformation using an experimental-numerical approach. The experimental data was obtained from tension tests on notched specimens and correlated with temperature measurements using infrared cameras.
MECHANICS OF MATERIALS
(2023)
Article
Engineering, Civil
Andria Antoniou, Tore Borvik, Martin Kristoffersen
Summary: This study investigates the simulation of high-strength concrete under ballistic impact and evaluates the accuracy of parameter generators and inverse modeling approaches to obtain input data for concrete material models. The results show significant variations in the parameters generated by different models, but improved results can be achieved through inverse modeling using standardized material tests. The study recommends caution when using automatic parameter generators and suggests a simplified calibration approach for designing concrete protective structures.
INTERNATIONAL JOURNAL OF PROTECTIVE STRUCTURES
(2023)
Article
Physics, Applied
Kim Robert Tekseth, Jonas Rudshaug, Mahdieh Gholami Mayani, Muhammad Nadeem Akram, Tore Borvik, Dag Werner Breiby
Summary: Glass is increasingly used as a load-carrying construction material, making the investigation of its mechanical properties and surface defects crucial. This study demonstrates the use of Fourier ptychographic microscopy to detect and measure glass surface defects through quantitative phase images. The proposed technique allows for quantitative and scalable defect analysis over extended areas, which can contribute to better mechanical models for predicting glass failure.
APPLIED PHYSICS LETTERS
(2023)
Article
Mechanics
Jonas Rudshaug, Odd Sture Hopperstad, Tore Borvik
Summary: To develop accurate material models for glass, reliable experimental procedures are needed to capture the stochastic nature of the material. In this study, we conducted experiments on different windshields under quasi-static loading to reveal their stochastic behavior. We used 3D-Digital Image Correlation (3D-DIC) and high-speed cameras combined with pose estimation-based post-processing to monitor displacement field and capture fracture initiation and crack propagation data. Finite element simulations were also performed to estimate major principal stress values. The results from this study provided valuable data for the development of numerical models.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Kristin Qvale, Odd Sture Hopperstad, David Morin, Tore Borvik
Summary: Numerical simulation is increasingly important in the automotive industry for the development of crash components, as it allows for accurate predictions of deformation and fracture behavior. This study aims to predict crash behavior using explicit finite element simulations and a porous plasticity model, and compares the results to CT scans of the profiles. While the simulations accurately represent important features, such as folding pattern and fracture initiation, there is still room for improvement in dynamic simulations.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Kristoffer A. Brekken, Maria S. Bakk, Sumita Dey, Torodd Berstad, Aase Reyes, Tore Borvik
Summary: Sandwich structures with an inhomogeneous aluminium foam as core material and thin aluminium plates as skins were subjected to ballistic impact tests. Numerical models were able to reproduce the complex response of the sandwich panel.
Article
Mechanics
Jonas Rudshaug, Karoline Osnes Aasen, Odd Sture Hopperstad, Tore Borvik
Summary: This article proposes a new glass strength prediction model (GSPM) that captures the fracture initiation nature of glass plates. The model combines the theories of linear elastic fracture mechanics and sub-critical crack growth to generate representative fracture strength distributions. It also provides the option to trigger fracture in constitutive models for investigating interdependent fracture initiation behavior. The GSPM shows great promise in terms of usability and prediction capacity for glass structures.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Review
Medicine, General & Internal
Rasmus Tolstrup Larsen, Vibeke Wagner, Christoffer Bruun Korfitsen, Camilla Keller, Carsten Bogh Juhl, Henning Langberg, Jan Christensen
Summary: This study aimed to estimate the effectiveness of physical activity monitor (PAM) based interventions among adults and found that PAM interventions can effectively increase physical activity and moderate to vigorous physical activity. However, the effect might be overestimated due to publication bias.
BMJ-BRITISH MEDICAL JOURNAL
(2022)
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)
