Article
Engineering, Mechanical
Olusegun Fatoba, Robert Akid
Summary: This study investigates the influence of separation distance between pre-induced corrosion pits on crack initiation and fatigue lifetimes in the low-stress, high cycle fatigue regime. The results show that decreasing the separation distance below a threshold leads to earlier crack initiation and decreased fatigue lifetimes. However, when the separation distance is above this threshold, multiple pits behave independently.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Mechanical
Yuanpei Chen, Qing Wang, Wei Qin, Jian Xiang
Summary: This paper investigates the influence of pitting corrosion on wire rope strands. A high-precision finite element model is established to analyze the mechanical properties of the corroded strands. The results show that stress concentration occurs in the corrosion area, and the existence of corrosion pits increases the maximum stress and plastic strain of the strand, decreasing its bearing capacity.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Construction & Building Technology
Yuanpei Chen, Wei Qin, Qing Wang, Hong Tan
Summary: This study analyzes the influence of corrosion pit on the tensile mechanical properties of a multi-layered wire rope strand, showing that corrosion pit significantly increases stress, strain, and inter-wire contact pressure, while reducing the axial loading capacity of the strand. The effects of corrosion pit on the strand's properties vary with the direction and position angles of the pit.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Shuai Wang, Xiaopeng Xi, Xixue Xing, Haipeng Chi
Summary: In this article, a finite element approach is used to simulate the stress interaction between the internal steel wires of a steel wire rope under practical working conditions. Corresponding parameters are proposed to estimate the service life of the rope based on the amount of fatigue broken wire observed in experiments. The effect of various conditions on the service life of the steel wire rope is analyzed and approaches for improving its service life are suggested.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Civil
Xu Han, Dan M. Frangopol
Summary: Fatigue cracking is a common issue for steel bridges. Structural health monitoring techniques can provide reliable information on stress states at fatigue-prone details. However, when considering corrosion, relying solely on monitoring information may not be enough to accurately estimate the impact of corrosion on fatigue damage.
ENGINEERING STRUCTURES
(2022)
Article
Chemistry, Analytical
Mingjiang Xie, Yifei Wang, Weinan Xiong, Jianli Zhao, Xianjun Pei
Summary: This paper proposes a crack propagation method for pipelines with interacting corrosion and crack defects, and predicts the SIF interaction impact ratio using XGBoost models. Experimental results show that the proposed method effectively predicts the SIF interaction impact ratio, and investigates the impact of interaction between corrosion and crack defects on crack defect growth.
Article
Computer Science, Information Systems
Qingming Deng, Xiaochun Yin, Magd Abdel Wahab
Summary: This paper analyzed the effect of surface treatment on fretting fatigue specimen using Finite Element Analysis, showing that the processed specimen with a cylindrical pit is safer than the flat specimen. The crack initiation position is dependent on tensile stress.
CMC-COMPUTERS MATERIALS & CONTINUA
(2021)
Article
Engineering, Multidisciplinary
A. Yosri, A. Zayed, S. Saad-Eldeen, H. Leheta
Summary: Corrosion significantly deteriorates the fatigue life of aged ship and offshore structures, making reliable numerical fatigue life analysis crucial for safe operation. The study investigates the factors affecting stress concentration and fatigue life randomness in corroded specimens, showing that stress concentration depends heavily on mean and minimum plate thickness. The research also proposes a time-dependent S-N curve for corroded structures considering material deterioration.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Engineering, Mechanical
F. Mehri Sofiani, S. Chaudhuri, S. A. Elahi, K. Hectors, W. De Waele
Summary: A parametric 3D finite element model is developed to analyze the stress distribution of a pitted plate subjected to corrosion pits. The study finds that the geometric parameters of the pits have a significant influence on the location of the stress concentration region. Kt values increase as the pits become narrower, the angle between the load direction and the major axis of the pit mouth increases, and the localized thickness loss increases. Additionally, a regression model is proposed to estimate Kt based on the geometric parameters of a pit.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Materials Science, Multidisciplinary
Dejan Momcilovic, Ivana Atanasovska, Snezana Vulovic, Ana Pavlovic
Summary: This paper describes the methodology for the life assessment of corroded prestressing wires, including the 3D characterization of corroded surfaces, determination of mechanical properties, and Finite Element Analysis (FEA) of a model with corrosion pits. The methodology enables more efficient evaluation of repair range and options for mechanical prestressing systems in various structures.
Article
Materials Science, Multidisciplinary
Gianluca Roscioli, Matej Repka, Stella Pedrazzini, Cemal Cem Tasan
Summary: It is found that the direction of crack propagation and failure mechanism in coated carbide-rich martensitic stainless steels changes with increasing corrosion severity.
Article
Geosciences, Multidisciplinary
Wenbin Cai, Xiangyang Mo, Wen Li, Shun Liu, Desheng Zhou, Huiren Zhang, Zhimin Huang
Summary: This study analyzed the onsite fatigue damage and stress distribution in pumping rods in depth. Macroscopic morphology and chemical properties of fatigue damage were analyzed. The crystalline phase composition and hardness of fatigue damage were analyzed. Stress distribution was analyzed in terms of rod-body stress and connection-section stress. The study also summarized the cross-sectional characteristics of fatigue crack expansion and identified the types of fatigue fracture and influencing factors of the pumping rod. Modeling and stress analysis of the pumping rod were performed using SolidWorks and ABAQUS software. By comparing stress cloud diagrams of different thread root shapes, the factors causing fracture in the pumping rod and the locations of stress concentrations and dangerous cross-sections were determined.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Engineering, Mechanical
Chun Ting Poon, Richard A. Barrett, Sean B. Leen
Summary: This paper presents a finite element methodology for the analysis of fretting between copper conductors in multi-strand cables. The effects of various factors on fretting fatigue life are investigated, and a rationalization of the relative contact size effects is provided.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Ocean
Alireza Sadat Hosseini, Esmaeil Zavvar, Hamid Ahmadi
Summary: This study validated the effectiveness of using FRP materials to strengthen offshore structures through the finite element method and determined the optimal fiber orientation in the FRP layup through a parametric study. The research found that under appropriate loading conditions, using CFRP can achieve over 50% reduction in SCF values at the support position.
APPLIED OCEAN RESEARCH
(2021)
Article
Engineering, Marine
J. Kodvanj, Y. Garbatov, C. Guedes Soares, J. Parunov
Summary: This study compares numerically evaluated stress concentrations of small-scale corroded steel specimens with experimentally estimated ones. The surfaces of corroded specimens were analyzed using photogrammetry techniques, and stress concentration factors were calculated from finite element results. The correlation between experimental and numerical results showed a certain degree of consistency.
JOURNAL OF MARINE SCIENCE AND APPLICATION
(2021)
Article
Construction & Building Technology
Hongguang Min, Weiping Zhang
Summary: This paper presents a comprehensive study on chloride transport in damaged concrete, investigating the effects of temperature, temperature gradient, relative humidity, humidity gradient, concrete damage, and exposure time on chloride transport. By establishing and verifying a chloride transport model, it is found that coupled heat and moisture as well as concrete damage have significant effects on chloride transport in damaged concrete.
MAGAZINE OF CONCRETE RESEARCH
(2022)
Article
Engineering, Civil
Chao Jiang, Hao Ding, Xiang-Lin Gu, Wei-Ping Zhang
Summary: This paper proposed a failure mode-based calculation method for predicting the bending bearing capacities of concrete beams with corroded reinforcement bars. The results showed that the proposed method had good predictive performance across the full range of corrosion ratios, enhancing performance assessment of existing RC structures and reliability analysis of new structures.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Xi -Yuan Yu, Chao Jiang, Wei-Ping Zhang
Summary: This paper presents a failure mode-based calculation method for evaluating the bending bearing capacities of CFRP sheet-strengthened corroded RC beams. By analyzing the stress states of concrete, corroded steel bars, and CFRP sheets at bending failure, four balanced failures and five failure modes are defined and identified. The proposed calculation method is validated through a dataset of bending tests on 96 CFRP sheet-strengthened corroded RC beams, and it provides guidance for designing strengthening ratios of CFRP sheets and assessing the bending failure modes and capacities of existing CFRP sheet-strengthened corroded RC beams.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Weiping Zhang, Junli Qiu, Chunlei Zhao
Summary: The static loading experiment and finite element simulation were conducted to study the degradation of the metro lining segment under different corrosion conditions and loading eccentricities. The severe corrosion of the tensile rebars and the large loading eccentricity were found to be the primary factors affecting the structural behavior of the segment. The bearing capacity and bending stiffness decreased with the increasing corrosion degree and loading eccentricity, while the corrosion location had no effect on them. Decreased loading eccentricity reduced the ductility of the corroded lining segment and increased the likelihood of small eccentric compression failure. As the loading eccentricity exceeded the critical value of 0.20 m, the corrosion degree had a more significant impact on the structural behavior of the corroded segment.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2022)
Article
Construction & Building Technology
Weiping Zhang, Junli Qiu, Chunlei Zhao, Xian Liu, Qinghua Huang
Summary: Based on static load tests and finite element simulations, this study analyzed the structural performances of the precast concrete tunnel lining (PCTL) of Shanghai Metro under different loading and corrosion conditions. The results showed that the weakened stiffnesses caused by corrosion led to the redistribution of internal forces, hence degrading the structural performance of PCTL. Additionally, the study found that the deformability and load-carrying capacity of unloaded PCTL without corrosion were significantly lower compared to overloaded PCTL. The corrosion of intrados steel bars and bolts had a significant negative impact on the structural performance of PCTL.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Engineering, Geological
Weiping Zhang, Yang Liu, Feng Hu, Xianglin Gu
Summary: A large number of reinforced concrete structures designed without considering earthquake resistance are at risk of reinforcement corrosion and earthquake. Through the impressed current method, 11 low-strength concrete RC columns with different levels of corrosion were obtained and subjected to low-cycle repeated loading tests. The seismic performance of corroded RC columns was analyzed by discussing the impact of reinforcement corrosion on failure modes, hysteretic behavior, skeleton curve, and energy dissipation capacity. A numerical model based on the multi-spring model was developed, and the numerical simulation results showed agreement with experimental results. The influence of concrete strength, reinforcement ratio, and axial compression ratio on the impact of reinforcement corrosion on the seismic performance of RC columns was further investigated.
BULLETIN OF EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Civil
Qian-Qian Yu, Xiang-Lin Gu, Yan-Hong Zeng, Wei-Ping Zhang
Summary: This paper presents an experimental and theoretical analysis on corroded prestressing tendons and concrete beams. The study found that the corrosion of prestressing tendons significantly degraded their deformability and strength, leading to a deteriorated flexural bearing capacity of the beams.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Xiguang Liu, Weiping Zhang, Xianglin Gu, Zhiwen Ye
Summary: Millions of in-service concrete bridges worldwide are aging beyond their expected lifespan, and understanding the fatigue behavior of corroded prestressed concrete (PC) bridges is crucial. This study conducted experimental investigations on the fatigue behavior of corroded PC beams. All beams failed due to fatigue fracture of the corroded tensile steel bars.
JOURNAL OF STRUCTURAL ENGINEERING
(2023)
Article
Materials Science, Characterization & Testing
Yong Zhou, Bin Xue, Weiping Zhang, Renpeng Wang
Summary: This paper presents a method for generating microstructures of transversely isotropic closed-cell polyvinyl chloride (PVC) foams with different densities based on the geometric characteristics obtained from X-ray computed tomography (CT) technology. The proposed method utilizes the advancing front method to densely pack a set of spheres proportionate to the cell volume distribution, forming the microstructure through Laguerre tessellation. The good consistency between the numerical models' geometric characteristics and those from CT validates the accuracy and efficiency of the proposed method in producing representative microstructures of PVC foams. Additionally, a method for optimizing the microstructure of small-sized numerical specimens is proposed to match the geometric characteristics of large specimens.
Article
Materials Science, Characterization & Testing
Yong Zhou, Bin Xue, Weiping Zhang, Renpeng Wang
Summary: This paper proposes a method based on microscopic models to predict the bulk mechanical properties of transversely isotropic closed-cell polyvinyl chloride (PVC) foams, and investigates the relationship between the scaling factor and the mechanical properties through numerical analysis. The paper also formulates the relations between the bulk mechanical properties of the transversely isotropic foam and the relative density.
Article
Engineering, Civil
Chao Jiang, Hao Ding, Wei -Ping Zhang, Xiang-Lin Gu
Summary: This paper proposes a failure mode-based calculation method for determining the bearing capacities of corroded reinforced concrete (RC) columns under eccentric compressive loads. The method takes into account the degradation of mechanical properties of steel bars due to corrosion, as well as the reduction in cross-sectional areas of both steel bars and concrete. Through analyzing stress and strain distributions across the normal cross-section, four balanced failures and six failure modes are identified for corroded RC columns. The method considers corrosion degree and balanced corrosion degrees to predict the failure mode of an eccentrically compressed corroded RC column in advance, and provides methods to calculate the eccentric compressive bearing capacity under each failure mode. The method is validated using a dataset of eccentric compressive tests on corroded and non-corroded RC columns, showing good agreement with test results. The failure mode-based calculation method enables rapid and accurate evaluation of the performance of existing corroded RC columns, as well as fast and efficient time-dependent reliability analysis for planned RC columns.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Chao Jiang, Hao Ding, Xiang-Lin Gu, Wei -Ping Zhang
Summary: This short communication presents the calibration analysis methods and results for shear capacities of corroded RC beams. A dataset involving shear tests on control and corroded RC beams was established, and a generalized calibration method for calculation formulas of shear capacities was proposed. The recommended reduction functions and corresponding shear capacity calculation formulas were found to be reliably conservative. The dataset is available for readers to calibrate their own calculation formulas. These recommended formulas can help in the safety assessments of existing RC structures.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Hong-Yuan Guo, Chao Jiang, Xiang-Lin Gu, You Dong, Wei -Ping Zhang
Summary: This paper proposes a novel and generic computational framework to assess the time-dependent reliability of reinforced concrete (RC) structures under marine atmospheric environments. The framework includes a comprehensive life-cycle performance assessment model that considers climate change, two-dimensional chloride transport, the coupling effects and corrosion non-uniformity of reinforcement, and the nonlinear behavior of RC beams. The accuracy and efficiency of the proposed method are validated by traditional Monte Carlo Simulation (MCS).
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Mechanical
Yong Zhou, Bin Xue, Yunxin Guo, Weiping Zhang, Renpeng Wang
Summary: The mechanical responses of sandwich plates with CFRP laminate as face-sheets and PVC foam as core under hailstone impact were studied. The experimental results showed invisible damages such as delamination and indentation of the foam core. A numerical model was calibrated using the experimental data and a parametric analysis was conducted to investigate the dynamic responses of CFRP/PVC foam sandwich panels. The study found that the foam cushion could effectively protect the rear face-sheet and increasing the ratio of span to thickness of the panel could reduce the damage degree.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Chemistry, Physical
Yong Zhou, Weiping Zhang, Fei Tong, Xianglin Gu
Summary: The moisture transport of axial-compression-damaged mortar and concrete was studied through experiments and analysis. The results showed that while the porosities of both mortar and concrete only slightly increased, the sorptivities were sensitive to axial compression damage and increased with the stress level.
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)