Article
Construction & Building Technology
O. Bouzas, B. Conde, J. C. Matos, M. Solla, M. Cabaleiro
Summary: Nowadays, historical masonry arch bridges are facing a deficiency in conservation due to natural or human-induced degradation processes. These bridges have significant economic, cultural, and heritage value, so it is important to assess their structural integrity and safety condition. This study focuses on the influence of the scattering of arches' thickness dimensions on the load-carrying capacity assessment of a historical stone bridge in Galicia, Spain.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Engineering, Civil
Emre Alpaslan, Mehmet Fatih Yilmaz, Burcu Dinc Sengönül
Summary: Historical masonry bridges are important in transportation, but many have been damaged by natural disasters. Linear analysis approaches are insufficient for evaluating the actual capacities of these bridges, hence further research is needed. The objective of this study is to evaluate load-carrying capacity and perform reliability analysis of an existing historical arch bridge.
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2023)
Article
Engineering, Mechanical
Vildan G. Mentese, Oguz Gunes, Oguz C. Celik, Burcu Gunes, Ayse Avsin, Mehmet Yaz
Summary: This study focuses on the nonlinear structural behavior of stone masonry arch bridges and investigates the effect of different modeling approaches on simulating the true behavior of the structural system. Experimental and numerical studies were conducted, and both macro and simplified micro modeling approaches were found to accurately predict the collapse load and collapse mechanism. For masonry bridges with complex geometry, macro modeling technique is preferred over simplified micro models.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Energy & Fuels
Shiqian Xu, Jianchun Guo, Qihong Feng, Guotong Ren, Yuyao Li, Sen Wang
Summary: This study systematically investigates the relationships between hydraulic fracturing treatment parameters and three optimization goals: uniform fracture propagation, stimulated reservoir volume (SRV) or fracture area maximization, and economic benefit maximization. The results indicate that pursuing different goals may have different impacts on achieving the maximum economic benefit, depending on the geological conditions.
Article
Engineering, Civil
Borja Conde, Jose C. Matos, Daniel V. Oliveira, Belen Riveiro
Summary: This work presents a probabilistic analysis approach for reliability-based assessment of masonry arch bridges. The methodology uses different numerical approaches to estimate the ultimate load-carrying capacity and employs sensitivity analysis and reliability assessment to reveal the key role of transversal effects on the strength capacity of the structure.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2021)
Article
Engineering, Civil
Semih Gonen, Serdar Soyoz
Summary: The paper explores the seismic assessment of a stone masonry arch bridge, highlighting the uncertainties in current assessment methods and offering recommendations for future research directions.
ENGINEERING STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Francesco Bencardino, Roberta Curto, Vincenzo Scavelli
Summary: This study conducted a structural analysis and seismic vulnerability assessment on a masonry arch bridge located in Potenza, Italy. It was found that the bridge did not meet the minimum requirements of current European Standards. Therefore, a traditional structural rehabilitation intervention was designed and modeled. The analysis of the repaired structure showed that the new risk indexes satisfied the seismic vulnerability verification, indicating that the proposed structural rehabilitation is a valid solution to the problem affecting the existing masonry arch bridge.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Civil
Paolo Borlenghi, Antonella Saisi, Carmelo Gentile
Summary: This paper summarizes selected results of the extensive research program carried out to assess the structural conditions of the Olla bridge, which is an arch bridge with stone masonry piers, connecting the French border with the South-West part of the Piedmont region. The bridge exhibited local damage of the arches and diffused surface decay. The research included historical research, geomatic survey, on-site visual inspection and limited local tests on materials, operational modal testing and analysis, development of a FE model based on architectural research and selected modeling assumptions, and choice of the uncertain structural parameters and identification of the optimal parameters based on the experimentally obtained data.
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2023)
Article
Geochemistry & Geophysics
L. Monasterio-Guillot, A. Fernandez-Martinez, E. Ruiz-Agudo, C. Rodriguez-Navarro
Summary: The weathering and carbonation of primary silicates are crucial for geochemical cycling of elements and climate regulation. The study investigated dissolution-carbonation reactions of Ca-Mg pyroxenes, revealing low-magnesium calcite and amorphous silica as main products. The presence of Fe and Al in the pyroxenes enhances cation release and contributes to secondary phase formation.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Engineering, Civil
Ozden Saygili, Jose Lemos
Summary: The study reveals that a shorter span bridge tends to withstand seismic actions with less damage, while a longer span bridge is more vulnerable to earthquake impacts. Rigid block models are effective in simulating the dynamic response of bridges and can be calibrated through vibration measurements.
Article
Engineering, Civil
A. Dell'Endice, S. Bouten, T. Van Mele, P. Block
Summary: This paper describes the engineering and structural design of a 3D-concrete-printed unreinforced masonry pedestrian bridge called Striatus, which was built in Venice in 2021. By combining 3D concrete printing with the principles of unreinforced masonry, the project successfully created a compression-only structure that can span space horizontally. This work demonstrates the potential of applying unreinforced masonry principles to 3D concrete printing for sustainable structural design.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Amirhosein Shabani, Mahdi Kioumarsi, Vagelis Plevris
Summary: Seismic analysis of historical masonry bridges is crucial for countries with cultural heritage assets. This study focused on a Roman period masonry arch bridge in Rhodes, Greece. Fifteen seismic records were categorized as far-field, pulse-like near-field, and non-pulse-like near-field. Nonlinear time-history analyses were performed and the bridge's post-earthquake damage state was examined. The results showed that pulse-like near-field events are more damaging and the bridge is more vulnerable to far-field excitations. Extensive retrofitting is required to address the post-earthquake damage.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2023)
Article
Engineering, Geological
Xiaohua Wang, Meirong Tang, Xianfei Du, Fengshou Zhang, Bing Hou, Jizhou Tang
Summary: This study investigates the fracture behavior near the wellbore for different perforation technologies through experiments and numerical simulations. The results show that oriented limited-entry (OLE) perforation has higher cluster efficiency and creates multiple planar fractures, while helical perforation generates various fracture morphologies. Perforation diameter and the number of clusters per stage are key factors influencing the stimulation effect.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Civil
Paolo Zampieri, Cyrille Denis Tetougueni, Carlo Pellegrino
Summary: Existing masonry bridges may suffer structural damage due to earthquakes, as their design did not consider seismic factors. The lack of advanced monitoring techniques and calculation tools in the scientific community hinders the accurate assessment of the integrity of these bridges. This study intensively investigates the seismic behavior of a seven-span masonry arch bridge and analyzes the impact of various parameters on the seismic capacity of multi-span masonry bridges, revealing changes in ductility, capacity, and stiffness of the structure when these parameters are modified.
Article
Chemistry, Multidisciplinary
Memduh Karalar, Gulsah Cufali
Summary: This study investigated the effect of arch form variation in thickness and height on a bridge through numerical analysis. A historic bridge, the Antik Iscehisar Bridge, was chosen as the numerical application. Static analysis was conducted to examine the impact of the bridge's own weight and moving load, while dynamic analysis focused on the effect of 10 different historical fault movements. The study determined the areas of principal stress and deformation and presented the results in contour diagrams, tables, and charts. Observation showed that displacements decreased with increasing arch thickness under the bridge's own weight and under the influence of live loads and earthquakes. The study also performed a seismic reliability assessment to determine if reinforcement interventions were necessary for the bridge's security.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Leandro Ferreira Friedrich, Ediblu Silva Cezar, Angelica Bordin Colpo, Boris Nahuel Rojo Tanzi, Mario Sobczyk, Giuseppe Lacidogna, Gianni Niccolini, Luis Eduardo Kosteski, Ignacio Iturrioz
Summary: This study focuses on analyzing acoustic emission signals to predict structure failure, and examines two main approaches: long-range correlation analysis and natural time domain analysis. These methods are applied to data from two examples, a glass fiber-reinforced polymeric plate and a spaghetti bridge model, and the results show that these methods provide reliable indications of structure failure.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
Alberto Carpinteri, Federico Accornero, Alessio Rubino
Summary: The scale effects on the global structural response of fibre-reinforced concrete beams subjected to bending are discussed in this paper using the Updated Bridged Crack Model (UBCM). The model predicts different post-cracking regimes based on the reinforcement brittleness number and the pull-out brittleness number, both of which depend on the beam depth. Numerical simulations and experimental results are compared to validate the model.
INTERNATIONAL JOURNAL OF FRACTURE
(2023)
Editorial Material
Chemistry, Multidisciplinary
Guang-Liang Feng, Sanichiro Yoshida, Giuseppe Lacidogna
APPLIED SCIENCES-BASEL
(2023)
Article
Mechanics
Alberto Carpinteri, Oscar Borla, Federico Accornero
Summary: Extensive experimental investigations on compression specimens of Gypsum and Quartz of different sizes revealed two different failure modalities: very brittle loading drop for micro-crystalline Gypsum and Quartz, and stable strain-softening behaviour for macro-crystalline Gypsum. All tested specimens emitted acoustic and electromagnetic waves, cumulating up to the peak load. Neutron emissions were only evident for the largest specimens. Changes in chemical composition on fracture surfaces were consistently explained by low-energy nuclear reactions (LENR), including fusion and fission. Fusion reactions emerged from crushing tests for the first time, while fission reactions had previously explained results related to other materials like iron-rich natural rocks. A correlation between fusion nuclear reactions and strain-softening mechanical behavior, as well as between fission nuclear reactions and brittle mechanical behavior, emerges.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Construction & Building Technology
Renato Cafarelli, Federico Accornero, Alberto Carpinteri
Summary: Reinforced concrete and prestressed concrete beams need to have large plastic deformation capabilities to ensure their load bearing capacity. However, current theories and standards overlook the strain-softening behavior of concrete and rotation capacity of beams. The Cohesive/Overlapping Crack Model can evaluate concrete cracking and crushing as well as unstable phenomena and steel yielding. Numerical investigations reveal the size-scale effects on plastic rotation capacity and propose new scale-dependent limits of reinforcement percentage for reinforced concrete structures.
STRUCTURAL CONCRETE
(2023)
Article
Construction & Building Technology
Federico Accornero, Renato Cafarelli, Alberto Carpinteri, Antonio Nanni
Summary: GFRP-reinforced concrete is a cementitious material with corrosion-resistant GFRP rebars as the reinforcing secondary phase. The cohesive/overlapping crack model (COCM) is used to describe the transition between cracking and crushing failures in GFRP-RC beams. The model can also investigate local mechanical instabilities such as tensile snap back and snap-through caused by concrete cracking and reinforcement bridging action, as well as compression snap-back due to unstable growth of the crushing zone.
STRUCTURAL CONCRETE
(2023)
Article
Construction & Building Technology
Alessio Rubino, Federico Accornero, Alberto Carpinteri
Summary: Hybrid reinforced concrete (HRC) consists of continuous steel rebars and discontinuous fibers randomly distributed in the concrete matrix. The postcracking response of HRC is influenced by the amount of steel bars and reinforcing fibers, which can be explained using the Updated Bridged Crack Model (UBCM) in Fracture Mechanics. The UBCM considers nonlinear constitutive laws to describe the toughening action of the reinforcing secondary phases. Three dimensionless numbers, corresponding to bar-reinforcement brittleness, fiber-reinforcement brittleness, and pull-out brittleness, can predict different postcracking regimes of HRC.
STRUCTURAL CONCRETE
(2023)
Article
Chemistry, Multidisciplinary
Cheng Huijuan Liu, Giuseppe Lacidogna
Summary: In this paper, a new non-destructive method combining the Southwell non-destructive procedure with the stable analysis method of corroded spherical thin shells is proposed to estimate the critical load, critical thickness, and service life. Its practicality, ease of use, and generalizability make it more convenient than existing methods.
APPLIED SCIENCES-BASEL
(2023)
Article
Physics, Fluids & Plasmas
Alberto Carpinteri, Gianni Niccolini, Federico Accornero
Summary: By using complex potentials, the analogy between singularity problems in fluid and fracture mechanics is explored. Two equivalent geometries are examined: a thin plate immersed in a uniform flow and a crack subjected to out-of-plane shearing stress. The matching between the fluid velocity field and the shearing stress field is consistent with the hydrodynamic analogy. Additionally, a velocity-intensity factor criterion is defined to predict the forced transitional flow generated by a transversal plate obstacle.
Article
Construction & Building Technology
Raffaele Cucuzza, Angelo Aloisio, Federico Accornero, Antonella Marinelli, Elisa Bassoli, Giuseppe Carlo Marano
Summary: This paper compares numerical and analytical predictions for the shear capacity of fibre-reinforced concrete beams based on experimental literature tests. The authors compared the outcomes of a FE model using the DamageTC3d constitutive model, a literature formulation, and the current proposal of the Eurocode 2 draft for fibre-reinforced structures. The paper evaluates the sensitivity of the beam response to the fracture energy Gf, modified after the Model Code 2010 formulation. The investigation reveals a dependence of the estimated fracture energy on the beam size. Furthermore, the comparison between the numerical estimates and the analytical predictions using the MC2010 and the current EC2 draft proves that the error is substantially independent of the model selection but is strongly affected by the specific case study. This fact confirms the absence of weaknesses in the numerical modelling and highlights the aleatoric uncertainties of the experimental data.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Environmental Sciences
Giuseppe Lacidogna, Oscar Borla, Valentina De Marchi
Summary: This study examines the temporal variation in the b-value of earthquakes in different regions of Italy. The b-value is related to earthquake occurrences, with higher values indicating low-magnitude events spread over a wide area, while lower values may predict a major earthquake along a fault. Each seismic event has a unique occurrence time, which is an important factor in earthquake statistics, and short- and long-term precursor phenomena need to be considered.
Article
Chemistry, Multidisciplinary
Zhenli Zhang, Qingyang Liu, Hongmin Chu, Giuseppe Lacidogna, Jie Xu, Haiyang Cheng, Zhitao Liu, Weitao Jiang
Summary: In this paper, an existing gravity expansion foundation with an anchor cage is improved to reduce costs and facilitate construction. The performance of the new foundation is studied via finite element simulation, and the results show that the improved wind turbine foundation can meet the requirements of actual projects under ultimate load conditions.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Gang Jing, Yixin Zhao, Yirui Gao, Pedro Marin Montanari, Giuseppe Lacidogna
Summary: Although exhaled aerosols may appear chaotic, they contain information about respiratory physiology and anatomy. This study created a database of simulated exhaled aerosol images and tested different convolutional neural network models. The performance of the models decreased for outbox test images, but ResNet-50 showed the best performance in both multi-level testing and continuous learning.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Boris Nahuel Rojo Tanzi, Mario Sobczyk, Ignacio Iturrioz, Giuseppe Lacidogna
Summary: This work extends a total-collapse prediction method to include local failures in quasi-brittle materials. The proposed failure index is compared with the established b-value using acoustic emission data from a basalt specimen. Simulation results show that the parameter calculation can be indirectly estimated by the elastic energy released during the damage process. The proposed method consistently outperforms the b-value as a failure precursor in experimental studies.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Boris Nahuel Rojo Tanzi, Gabriel Birck, Mario Sobczyk, Ignacio Iturrioz, Giuseppe Lacidogna
Summary: This paper discusses the combined application of the lattice discrete element method (LDEM) and the acoustic emission (AE) technique for analyzing damage in quasi-brittle materials. The methods were applied to study damage in a concrete slab and a pre-fissured sandstone beam. Simulations and experimental data were used in the two tests. The results show that the synergistic use of these two methods provides a comprehensive understanding and an effective approach for assessing damage processes.
APPLIED SCIENCES-BASEL
(2023)
