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 this 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 this 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 this 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 this 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 this 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 >