Article
Thermodynamics
Johan Bjurstrom, Fredrik Ohlsson, Andreas Vikerfors, Cristina Rusu, Christer Johansson
Summary: This paper introduces a novel concept for efficiently harvesting vibrational energy at low frequencies and small displacements using an electromagnetic energy harvester. Simulation modeling and experimental validation demonstrate the potential performance of this method under harmonic and non-harmonic excitations.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Construction & Building Technology
Shaoqin Wang, Xing Wan, Minghao Guo, Hong Qiao, Nan Zhang, Qing Ye
Summary: A dynamic interaction model of the wind-train-bridge system considering the geometric nonlinear factors of a long-span suspension bridge is developed. A self-written program is used to compare the linear and nonlinear vibration responses of the bridge under the simultaneous action of train and wind loads. The research findings can provide references for the safe operation and maintenance of long-span bridges.
Article
Engineering, Civil
Daniel Cusson, Cristian Rossi, Istemi F. Ozkan
Summary: This paper discusses the use of satellite data for monitoring bridge movement and early warning, with a focus on utilizing InSAR technology for data analysis and processing, monitoring bridge behavior through thermal sensitivity, and proposing specific calculation methods to determine the extent of thermal movement for bridges.
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2021)
Article
Construction & Building Technology
Kun Xu, Qian Dai, Kaiming Bi, Genshen Fang, Yaojun Ge
Summary: This study proposes closed-form design formulas of TMDI for vortex-induced vibration (VIV) control of bridges and verifies their reliability through wind tunnel experiments. The effect of TMDI on the bridge is found to be equivalent to an increase of structural damping, and design suggestions are presented.
STRUCTURAL CONTROL & HEALTH MONITORING
(2022)
Article
Engineering, Civil
Lianhuo Wu, J. Woody Ju, Jinxiang Zhang, Mingjin Zhang, Yongle Li
Summary: The research on vibration characteristics of long-span bridges is crucial for flutter analysis, but there is limited literature on the phase difference characteristic of the full bridge. This study aimed to investigate the vibration phase difference characteristics and mechanism along the main span during flutter. Time-domain flutter analysis was conducted in a long-span suspension bridge. The results revealed phase differences in vibration at the same positions in different directions, as well as at different positions in the same direction of the main girder and main cable, which varied along the main span. The findings provide insights into the flutter performance and mechanism of long-span bridges.
ENGINEERING STRUCTURES
(2023)
Article
Chemistry, Analytical
Zichuang Li, Lei Liang, Hui Wang, Shu Dai, Ke Jiang, Zhiyuan Song
Summary: A novel medium-frequency accelerometer, based on fiber Bragg grating and flexible hinges, has been proposed in this paper. The differential structure doubles the sensitivity of the sensor while avoiding temperature effects. The proposed sensor shows good temperature self-compensation function and lateral anti-interference capability.
Article
Construction & Building Technology
Guanya Lu, Kehai Wang, Weizuo Guo
Summary: A framework based on machine learning models was proposed to analyze the vibration characteristics of specific line bridge groups in this study. Random forest models and artificial neural network models showed good performance in predicting vibration modes and periods, providing an intelligent and efficient method for obtaining vibration characteristics of bridge groups for a specific network.
ADVANCES IN STRUCTURAL ENGINEERING
(2021)
Article
Engineering, Mechanical
J. A. Loya, J. Aranda-Ruiz, R. Zaera
Summary: This study analyzes the dynamic behavior of cracked Timoshenko beams immersed in a Winkler elastic medium and obtains their natural frequencies of bending vibration. By modeling the beam as two segments connected by springs and considering the discontinuity of displacement and rotation due to bending, the differential equations for free vibration are solved. The proposed methodology allows for calculating the natural frequencies as a function of support type, soil stiffness, crack position, and initial crack length. The results are compared to other simplified models, highlighting the interaction and importance of the parameters considered in the system's natural frequencies.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Chemistry, Multidisciplinary
Yafei Wang, Changfa Zhou, Jiwei Zhong, Zhengxing Wang, Wenfan Yao, Yuyin Jiang, Shujin Laima
Summary: The increasing number of suspension bridges has led to the common problem of vortex-induced vibration. This study proposes an evaluation method for assessing ride comfort during vortex-induced vibrations in long-span bridges and analyzes the influence of various parameters on ride comfort.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Civil
Yubing Song, Zilong Ti, Yongle Li
Summary: This study presents an efficient two-stage hybrid approach that combines a divergent vibration simulation and a nonlinear model for predicting vortex-induced vibration (VIV) in bridge decks. By introducing negative structural damping, a divergent vibration is intentionally created which significantly accelerates the growth of motion while maintaining reasonable accuracy. The proposed framework shows favorable efficiency, satisfactory accuracy, and is a potential numerical alternative for VIV investigation in bridge decks.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2023)
Article
Metallurgy & Metallurgical Engineering
Liu Shao-hui, Jiang Li-zhong, Zhou Wang-bao, Feng Yu-lin
Summary: Based on Hamilton's principle, the differential equations for free vibration of track-bridge systems with mortar gap are derived. A method for calculating the natural frequencies of track-bridge systems is proposed. The study analyzes the influence of the flexural stiffness of the track-bridge system, the vertical and longitudinal stiffness of the mortar layer, gap position, and gap length on the natural frequencies. The results show that the flexural stiffness of the bridge layer has the greatest impact on the system's natural frequencies, while the longitudinal stiffness of the mortar layer and gap position have minimal effect. The gap length significantly affects the 4th-5th order natural frequencies of the track-bridge system.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Engineering, Civil
Zhanhang Liu, Lin Chen, Limin Sun, Lin Zhao, Wei Cui, Hua Guan
Summary: Long-span suspension bridges are prone to wind-induced vibrations, and damped outriggers have been proposed as a solution. However, the interdependency of damping effects and difficulty in tracking mode orders and damping variations have posed challenges in design optimization. This study presents an optimization method using finite element analysis, modal assurance criterion, and genetic algorithm to maximize multimode damping. The method was successfully applied to the Xihoumen Bridge, reducing required damper coefficients by 49.4% and achieving a damping ratio over 1.0% for 6 out of 7 modes vulnerable to vortex-induced vibrations.
ENGINEERING STRUCTURES
(2023)
Article
Chemistry, Analytical
Abdollah Malekjafarian, Muhammad Arslan Khan, Eugene J. OBrien, E. Alexandra Micu, Cathal Bowe, Ramin Ghiasi
Summary: This paper presents a field study on the natural frequencies of Malahide viaduct bridge in Dublin using an indirect bridge monitoring approach. The results show the effectiveness of the approach in accurately estimating the natural frequencies of each span of the viaduct.
Article
Engineering, Marine
Jin Wei, Wei Liu, Peixin Gao, Yujie Ding
Summary: In this paper, an analytical dynamic model is proposed for vibration suppression of a multi-span continuous bridge by tuned mass dampers (TMDs). The partial differential equations (PDEs) governing the motion of the bridge and TMDs are obtained, and the mode shapes and orthogonality relations are derived. The PDEs are then truncated into ordinary differential equations (ODEs) to describe the motion of the entire system. The proposed model is validated by comparing the natural frequencies with those obtained from finite element software.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Civil
Yi Su, Mingshui Li, Yang Yang, Jin Di, Xiongwei Yang, Ning Zhao
Summary: This study proposes a transfer function identification method based on reasonable technical means, considering the three-dimensional effect. The bridge buffeting responses are predicted directly using an original method and segmental model vibration tests. The method accurately predicts the buffeting responses by obtaining integrated transfer functions through the tests. It effectively improves the deviation of results and overcomes the limitations of pressure and force measurement methods.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2023)
Article
Engineering, Multidisciplinary
Ruijie Xi, Qiyi He, Xiaolin Meng
Summary: The study demonstrates that integrated GPS/BDS/GLONASS provides the highest precision in bridge monitoring, especially with high cutoff elevations due to the availability of more satellites and strongest satellite geometry. Further experiments conducted show that incorporating GPS/BDS/GLONASS at a cutoff elevation of 40 degrees allows for extremely accurate extraction of displacement and vibration signals in bridge monitoring applications.
Article
Environmental Sciences
Leyang Zhao, Li Yan, Xiaolin Meng
Summary: This study introduces an algorithm for extracting street curbs from mobile LiDAR data to address complex scenarios and improve the accuracy and reliability of the extraction results.
Article
Environmental Sciences
Zhen Fang, Jiayong Yu, Xiaolin Meng
Summary: The proposed method based on improved empirical wavelet transform was able to accurately identify the modal parameters of bridge structures using GNSS data. Experimental validations showed the feasibility and reliability of this method in identifying the dynamic deformation of bridges.
Article
Engineering, Electrical & Electronic
Xiao Lu, Xuning Mao, Haiqing Liu, Xiaolin Meng, Laxmisha Rai
Summary: Event cameras have wide applications in traffic flow detection due to their accurate identification of moving targets and insensitivity to stationary targets. In this study, an event camera is used in a roadside scenario to collect point cloud data, and a method for traffic target identification and shadow removal based on feature analysis is proposed. Experimental results show significant differences among different traffic targets, with the proposed method achieving a high accuracy of 96.5%.
IEEE SENSORS JOURNAL
(2022)
Article
Environmental Sciences
Shengli Wang, Yulong Ge, Xiaolin Meng, Pengli Shen, Kaidi Wang, Fuyang Ke
Summary: This study develops two SF PPP time transfer models using BDS-3 signals and compares their performance. The ionospheric constraint SF1 model outperforms the SF2 model. SF1 achieves a statistical uncertainty of less than 1 nanosecond and exhibits improved frequency stability compared to B1I observations.
Article
Environmental Sciences
Zhansheng Liu, Guoliang Shi, Xiaolin Meng, Zhe Sun
Summary: This study established a method for achieving intelligent control of building operation and maintenance processes by integrating Global Navigation Satellite System (GNSS) with Digital Twins (DTs) techniques. The method includes capturing dynamic information, establishing a DT model, setting up data management mechanism, and formalizing an intelligent decision control platform. Results show that the proposed GNSS-DTs-based method can help achieve intelligent control of large building O&M processes.
Article
Environmental Sciences
Ronghua Yang, Jing Li, Xiaolin Meng, Yangsheng You
Summary: This paper proposes a rigorous estimation algorithm based on least squares configurations for the precise extraction of spherical target features from laser point clouds. By emphasizing the correlation between spherical parameters, the accuracy of estimating sphere centers is improved compared to classical algorithms.
Article
Environmental Sciences
Ao Sun, Qiuzhao Zhang, Zhangjun Yu, Xiaolin Meng, Xin Liu, Yunlong Zhang, Yilin Xie
Summary: This study proposes a method based on state-domain consistency theory for gross error detection in GNSS/accelerometer integrated deformation monitoring. By constructing state test statistics and performing gross error identification directly in the state domain, this method does not need to consider the dimensional change in the observation matrix, making it more applicable.
Article
Multidisciplinary Sciences
Guoliang Shi, Zhansheng Liu, Xiaolin Meng, Zeqiang Wang
Summary: This study proposes an intelligent method for the health monitoring of cable network structures, based on the fusion of twin simulation and sensory data. It establishes a high-fidelity twin model using genetic algorithm and captures the key components of the structure using Bayesian probability formula and multiple mechanical parameters. The feasibility and effectiveness of the proposed method are validated through a case study on the Speed Skating Gymnasium of 2022 Winter Olympic Games.
Article
Engineering, Electrical & Electronic
Chen Zhuang, Hongbo Zhao, Shan Hu, Xiaolin Meng, Wenquan Feng
Summary: This paper proposes a novel distributed fault detection and exclusion method based on cooperative reliability information, which is suitable for cooperative positioning system in connected vehicles. By considering the consistency of satellite signals and reliability information from nearby cooperators, multiple faulty satellites can be accurately excluded. Experimental results demonstrate the superiority of the proposed method in excluding multiple faults over existing methods.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Environmental Sciences
Liangliang Hu, Yan Bao, Zhe Sun, Xiaolin Meng, Chao Tang, Dongliang Zhang
Summary: Structural health monitoring (SHM) is essential for the safety of aging bridges. Global Navigation Satellite Systems (GNSS) can provide valuable spatiotemporal information for effective bridge structural health monitoring (BSHM), but GNSS measurements often have outliers that can significantly affect the accuracy and reliability of BSHM. Previous studies have explored the integration of multi-rate Kalman filter (MKF) with adaptive algorithms for accurate BSHM, but frequent parameter adjustments are still required. This study proposes an outlier detection method using a robust multi-rate Kalman filter (RMKF) to improve the accuracy of BSHM using GNSS and accelerometer data.
Article
Environmental Sciences
Rui Shang, Chengfa Gao, Lu Gan, Ruicheng Zhang, Wang Gao, Xiaolin Meng
Summary: This study investigates the temporal behaviors of differential inter-system bias (DISB) and implements an inter-system model for smartphones based on the research of receiver channel-dependent bias. Experimental results show that the CDMA systems' frequencies are free of receiver channel-dependent phase bias, providing opportunities for further interoperability. There is no phase DISB between GPS L1/QZSS L1 and BDS-2 B1I/BDS-3 B1I, but there is obvious phase DISB between GPS L1 and Galileo E1.
Article
Green & Sustainable Science & Technology
Zhansheng Liu, Xiaotao Sun, Zhe Sun, Liang Liu, Xiaolin Meng
Summary: There are some problems in the security management of large stadiums, and an intelligent security system based on the digital twin concept is proposed to improve the efficiency of security management. The modeling method combines physical and virtual models to analyze and control the security management process of buildings, enhancing the integration and intelligence of the security system.
Review
Green & Sustainable Science & Technology
Zhe Sun, Tiantian Chen, Xiaolin Meng, Yan Bao, Liangliang Hu, Ruirui Zhao
Summary: Trustworthy and explainable structural health monitoring (SHM) is crucial for ensuring the safe maintenance and operation of deficient bridges. However, existing methods face challenges in terms of cognitive, technical, and decision-making processes. The development of sensing devices and technologies enables intelligent data acquisition and processing, but human involvement introduces redundancies and errors that affect the reliability of SHM and bridge safety. Understanding human-cyber reliability issues is necessary to ensure reliable SHM.
Article
Construction & Building Technology
Zhe Sun, Haoyang Li, Yan Bao, Xiaolin Meng, Dongliang Zhang
Summary: This study aims to establish an intelligent risk prognosis and control framework based on digital twin (DT) for ensuring safe and effective foundation pit excavation (FPE) processes. The authors have established a DT model that consists of a physical space model and a high-fidelity physics-based model in virtual space, enabling the interaction and feedback mechanisms between the physical and virtual space. They have also proposed an integrated model and data-driven approach for examining safety risks during FPE.
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)