Open Access
ARTICLE
Yang Li1, Zikang Zheng1,*, Jiangkun Zhang2
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.046584
（This article belongs to the Special Issue: Health Monitoring and Rapid Evaluation of Infrastructures)
Abstract Due to the lack of a quantitative basis for the inspection, evaluation, and identification of existing transmission tower foundations, a new fuzzy comprehensive evaluation method is proposed to assess the reliability of transmission tower foundation bearing capacity. This method is based on the reliability analysis of the transmission tower foundation bearing capacity by analyzing the sensitivity of degradation of detection indexes on the reliability of transmission tower foundation bearing capacity, the weighting coefficient matrix is established about the influencing factors in the evaluation model. Through the correlation analysis between the bearing capacity degradation of the transmission tower foundation and its… More >
Open Access
ARTICLE
Yue Cao1,2, Longsheng Bao1, Xiaowei Zhang1,*, Zhanfei Wang1, Bingqian Li1
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.049698
Abstract This study addresses the issue of inaccurate single damage fingerprint recognition during the process of bridge
damage identification. To improve accuracy, the proposed approach involves fusing displacement mode difference and curvature mode difference data for single damage identification, and curvature mode difference and displacement mode wavelet coefficient difference data for two damage identification. The methodology begins by
establishing a finite element model of the cable-stayed bridge and obtaining the original damage fingerprints, displacement modes, curvature modes, and wavelet coefficient differences of displacement modes through modal
analysis. A fusion program based on the D-S evidence theory criterion is then developed using… More >
Open Access
ARTICLE
Haoan Gu1, Kai Zhu1, Alfred Strauss2, Yehui Shi3,4, Dragoslav Sumarac5, Maosen Cao1,*
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.042388
Abstract Concrete materials and structures are extensively used in transformation infrastructure and they usually bear
cracks during their long-term operation. Detecting cracks using deep-learning algorithms like YOLOv3 (You
Only Look Once version 3) is a new trend to pursue intelligent detection of concrete surface cracks. YOLOv3 is
a typical deep-learning algorithm used for object detection. Owing to its generality, YOLOv3 lacks specific effi-
ciency and accuracy in identifying concrete surface cracks. An improved algorithm based on YOLOv3, specialized
in the rapid and accurate identification of concrete surface cracks is worthy of investigation. This study proposes a
tailored deep-learning algorithm, termed MDN-YOLOv3… More >
Open Access
ARTICLE
Guangfei Jia*, Yanchao Meng, Zhiying Qin
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.049298
（This article belongs to the Special Issue: Sensing Data Based Structural Health Monitoring in Engineering)
Abstract The vibration signals of rolling bearings exhibit nonlinear and non-stationary characteristics under the influence of noise. In intelligent fault diagnosis, unprocessed signals will lead to weak fault characteristics and low diagnostic accuracy. To solve the above problem, a fault diagnosis method based on parameter optimization feature mode decomposition and improved deep belief networks is proposed. The feature mode decomposition is used to decompose the vibration signals. The parameter adaptation of feature mode decomposition is implemented by improved whale optimization algorithm including Levy flight strategy and adaptive weight. The selection of activation function and parameters is crucial in the application of… More >
Open Access
ARTICLE
Hüseyin Bilgin*, Bredli Plaku
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.048645
Abstract In this study, the influence of confined concrete models on the response of reinforced concrete structures is investigated at member and global system levels. The commonly encountered concrete models such as Modified Kent-Park, Saatçioğlu-Razvi, and Mander are considered. Two moment-resisting frames designed according to the pre-modern code are taken into consideration to reflect the example of an RC moment-resisting frame in the current building stock. The building is in an earthquake-prone zone located on Z3 Soil Type. The inelastic response of the building frame is modelled by considering the plastic hinges formed on each beam and column element for different… More >
Open Access
ARTICLE
Hantao Huang, Zhifang Zhang*, Zhenhua Wu, Yao Liu
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.048597
Abstract In this paper, recycled carbon fiber reinforced polymer (CFRP) mixture (CFRP-M, including recycled carbon fiber and powder) and refined recycled CFRP fiber (CFRP-F, mostly recycled carbon fiber) were added to cement to study the influence of addition on the flexural strength, compressive strength, and fluidity of cement-based materials. The recycled CFRP were prepared by mechanically processing the prepreg scraps generated during the manufacture of CFRP products. For comparison, commercial carbon fiber powder was also added in cement and the performance was compared to that of addition of recycled CFRP. The hydration products and strengthening mechanism of cement-based materials were analyzed… More >
Open Access
ARTICLE
AL-Bukhaiti Khalil1, Yanhui Liu1,*, Shichun Zhao1, Daguang Han2
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.044751
Abstract This study provides a comprehensive analysis of collision and impact problems’ numerical solutions, focusing on geometric, contact, and material nonlinearities, all essential in solving large deformation problems during a collision. The initial discussion revolves around the stress and strain of large deformation during a collision, followed by explanations of the fundamental finite element solution method for addressing such issues. The hourglass mode’s control methods, such as single-point reduced integration and contact-collision algorithms are detailed and implemented within the finite element framework. The paper further investigates the dynamic response and failure modes of Reinforced Concrete (RC) members under asymmetrical impact using… More >
Open Access
ARTICLE
Xilong Zheng*, Qiong Wang, Di Guan
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.048473
Abstract The deteriorated continuous rigid frame bridge is strengthened by external prestressing. Static loading tests were
conducted before and after the bridge rehabilitation to verify the effectiveness of the rehabilitation process. The
stiffness of the repaired bridge is improved, and the maximum deflection of the load test is reduced from 37.9 to
27.6 mm. A bridge health monitoring system is installed after the bridge is reinforced. To achieve an easy assessment of the bridge’s safety status by directly using transferred data, a real-time safety warning system is created
based on a five-level safety standard. The threshold for each safety level will… More >
Open Access
ARTICLE
Caiping Huang*, Zihan Huang, Wenfeng You
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.047850
（This article belongs to the Special Issue: Sensing Data Based Structural Health Monitoring in Engineering)
Abstract This paper presents an easily installed improved perfobond connector (PBL) designed to reduce the shear concentration of PBL. The improvement of PBL lies in changing the straight penetrating rebar to the Z-type penetrating rebar. To study the shear performance of improved PBL, two PBL test specimens which contain straight penetrating rebar and six improved PBL test specimens which contain Z-type penetrating rebars were designed and fabricated, and push-out tests of these eight test specimens were carried out to investigate and compare the shear behavior of PBL. Additionally, Finite Element Analysis (FEA) models of the PBL specimens were established and validated… More >
Open Access
ARTICLE
Haixia Kou1,*, Bowen Yang1, Xuyao Zhang2, Xiaobo Yang1, Haibo Zhao1
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.045023
（This article belongs to the Special Issue: Health Monitoring and Rapid Evaluation of Infrastructures)
Abstract Given the difficulty in accurately evaluating the fatigue performance of large composite wind turbine blades
(referred to as blades), this paper takes the main beam structure of the blade with a rectangular cross-section
as the simulation object and establishes a composite laminate rectangular beam structure that simultaneously
includes the flange, web, and adhesive layer, referred to as the blade main beam sub-structure specimen, through
the definition of blade sub-structures. This paper examines the progressive damage evolution law of the composite
laminate rectangular beam utilizing an improved 3D Hashin failure criterion, cohesive zone model, B-K failure
criterion, and computer simulation technology.… More >
Open Access
ARTICLE
Chengpeng Zhang, Junfeng Shi*, Caiping Huang
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.048705
（This article belongs to the Special Issue: Sensing Data Based Structural Health Monitoring in Engineering)
Abstract In this paper, an intelligent damage detection approach is proposed for steel-concrete composite beams based on
deep learning and wavelet analysis. To demonstrate the feasibility of this approach, first, following the guidelines
provided by relevant standards, steel-concrete composite beams are designed, and six different damage incidents
are established. Second, a steel ball is used for free-fall excitation on the surface of the steel-concrete composite
beams and a low-temperature-sensitive quasi-distributed long-gauge fiber Bragg grating (FBG) strain sensor is
used to obtain the strain signals of the steel-concrete composite beams with different damage types. To reduce
the effect of noise on the… More >
Open Access
ARTICLE
Yang Li, Sibo Jiang*, Ruixin Lan
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.047776
（This article belongs to the Special Issue: Health Monitoring and Rapid Evaluation of Infrastructures)
Abstract Chloride (Cl−) ion erosion effects can seriously impact the safety and service life of marine liquefied natural gas (LNG) storage tanks and other polar offshore structures. This study investigates the impact of different low-temperature cycles (20°C, –80°C, and −160°C) and concrete specimen crack widths (0, 0.3, and 0.6 mm) on the Cl− ion diffusion performance through rapid erosion tests conducted on pre-cracked concrete. The results show that the minimum temperature and crack width of freeze-thaw cycles enhance the erosive effect of chloride ions. The Cl− ion concentration and growth rate increased with the increasing crack width. Based on the experimental… More >
Open Access
ARTICLE
Chaozhi Cai*, Xiaoyu Guo, Yingfang Xue, Jianhua Ren
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.045831
（This article belongs to the Special Issue: Sensing Data Based Structural Health Monitoring in Engineering)
Abstract Bleachers play a crucial role in practical engineering applications, and any damage incurred during their operation poses a significant threat to the safety of both life and property. Consequently, it becomes imperative to conduct damage diagnosis and health monitoring of bleachers. The intricate structure of bleachers, the varied types of potential damage, and the presence of similar vibration data in adjacent locations make it challenging to achieve satisfactory diagnosis accuracy through traditional time-frequency analysis methods. Furthermore, field environmental noise can adversely impact the accuracy of bleacher damage diagnosis. To enhance the accuracy and anti-noise capabilities of bleacher damage diagnosis, this… More >
Open Access
ARTICLE
Baojun Qin1, Guangwei Zhang1, Wei Zhang2,*
Structural Durability & Health Monitoring, DOI:10.32604/sdhm.2024.047405
（This article belongs to the Special Issue: Health Monitoring and Rapid Evaluation of Infrastructures)
Abstract This study delves into the effects of shield tunneling in complex coastal strata, focusing on how this construction
method impacts surface settlement, the mechanical properties of adjacent rock, and the deformation of tunnel
segments. It investigates the impact of shield construction on surface settlement, mechanical characteristics of
nearby rock, and segment deformation in complex coastal strata susceptible to construction disturbances. Utilizing the Fuzhou Binhai express line as a case study, we developed a comprehensive numerical model using the
ABAQUS finite element software. The model incorporates factors such as face force, grouting pressure, jack force,
and cutterhead torque. Its accuracy is… More >
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