Article
Engineering, Mechanical
Yu-ji Tai, Hai-dong Wang, Zhi-qiang Chen
Summary: This paper presents a theoretical and numerical study of a tuned inerter negative stiffness damper (TINSD) system and its vibration control effect. The study shows that TINSD has superior performance in vibration isolation and seismic response control.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Civil
Hui Gao, Zhihao Wang, Junfeng Jia, Zhipeng Cheng
Summary: In this study, a new negative stiffness electromagnetic tuned inerter damper (NSETID) is proposed to suppress vortex-and rain-wind-induced vibrations of long stay cables. The non-dimensional analytical equations and optimum parameters of the NSETID are developed, taking into consideration influences of cable sag and flexural stiffness. The superior damping enhancement capabilities of the NSETID in mitigating single-mode and multi-mode cable vibrations are highlighted.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Huan Li, Kaiming Bi, Hong Hao
Summary: In this paper, a novel tuned negative stiffness inerter damper (TNSID) combining negative stiffness and inerter elements is proposed for seismic induced structural vibration control. The experimental results show that TNSID achieves dual mitigation effects on both the displacement and acceleration responses, widens the effective frequency bandwidth, and therefore achieves the most evident control effectiveness compared to the other devices investigated in this study.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Hui Gao, Chenxi Xing, Hao Wang, Jian Li, Yang Zhang
Summary: Base isolation is an effective earthquake protection strategy for building structures. To improve its control performance, a new device called tuned negative stiffness inerter damper (TNSID) is proposed. By combining the benefits of an inerter and a negative stiffness element, the TNSID shows advantages in displacement mitigation, damping enhancement, and energy reduction. A demand-oriented optimum design method is also developed to balance the control performance and design cost.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Huating Chen, Kaiming Bi, Yanhui Liu, Ping Tan
Summary: This paper introduces a multiple tuned inerter damper (MTID) system for seismic induced vibration control of engineering structures, which includes four different connection configurations of MTIDs. The optimal design parameters, control performance, stroke of each MTID, and robustness of the system were systematically investigated. Among the control schemes, two types of MTIDs were found to have pronounced control performances in suppressing displacement and absolute acceleration responses of the main structure.
STRUCTURAL CONTROL & HEALTH MONITORING
(2022)
Article
Engineering, Mechanical
Hui Gao, Hao Wang, Jian Li, Jianxiao Mao, Zhihao Wang
Summary: A novel negative stiffness inerter damper (NSID) is proposed to improve the control performance of stay cables. The NSID utilizes the damping enhancement of negative stiffness and inerter for cable vibration control. The modal behavior of the cable based on optimum parameters of the NSID is explored, and the damping enhancement principle and conditions are demonstrated. The control efficacy of the NSID is evaluated, showing better performance than other dampers in mitigating multi-mode cable vibrations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Hui Gao, Hao Wang, Jian Li, Jianxiao Mao, Zhihao Wang
Summary: A novel negative stiffness inerter damper (NSID) is proposed in this study to improve the control performance of stay cables. The NSID utilizes the damping enhancement of negative stiffness and inerter for cable vibration control. The study explores the modal behavior of the cable based on optimum parameters of the NSID and demonstrates the principle and conditions of the NSID for cable vibration control. The NSID performs better than other dampers in mitigating cable vibrations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Construction & Building Technology
Salah Djerouni, Said Elias, Mahdi Abdeddaim, Rajesh Rupakhety
Summary: This study investigates the efficiency of tuned inerter dampers (TIDs) in controlling the seismic response and pounding distance between two adjacent buildings. Through numerical examples and testing with various ground motions, the proposed solution is found to be more effective and superior to existing TID configurations.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Qigang Liang, Luyu Li, Qitao Yang
Summary: This study investigates the seismic control of the MSSS using tuned inerter damper (TID) and compares it with other control strategies. The effectiveness of the TID is verified through analysis of a multistorey MSSS, showing its performance is better than viscous damper (VD) and tuned mass damper (TMD) within the recommended working scope.
STRUCTURAL CONTROL & HEALTH MONITORING
(2021)
Article
Acoustics
Zheng Ge, Weirui Wang, Guangping LI, Daogong Rao
Summary: In this study, an active tuned inerter damper (TID) suspension is designed to overcome the adverse effects of inherent inertia in vehicle suspension systems. An analytical-solution-based parameter optimisation method is proposed to simplify the process of obtaining the optimal suspension parameters. The stability of the suspension is verified using algebraic stability analysis. Performance comparison demonstrates the advantages of the active TID suspension in improving suspension capacity and vehicle comfort.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Engineering, Civil
Hui He, Chunhua You, Ping Tan, Yue Xiang, Kui Yang
Summary: Tuned inerter dampers (TIDs) are promising devices for controlling seismic response of civil structures. This study investigates the effective damping ratio enhancement (EDRE) effect of TIDs and proposes theoretical formulas for optimal TID parameters. Compared to a tuned viscous mass damper, TIDs are particularly recommended when the damping ratio is restricted to less than 0.03. Numerical analysis verifies the effectiveness of TIDs in controlling structural seismic response due to their ability to suppress system input energy.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Daniel Caicedo, Luis Lara-Valencia, John Blandon, Carlos Graciano
Summary: This study presents a methodology for tuning TMDs and TMDIs in high-rise buildings using the DEM method, which is verified on actual building structures. The results show that classic TMDs optimally designed by DEM demonstrate a better seismic response compared to TMDIs.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Wei Liu, Kohju Ikago, Zhanzhan Wu, Iori Fukuda
Summary: This study proposes methods to modify a TMW model by adding stiffness-adjusting components to address the issue of introducing undesired storage stiffness in a base-isolated structure. Numerical analysis shows that the proposed modified TMW devices can improve the performance of base-isolated structures.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Mechanical
Yafeng Li, Ping Tan, Shouying Li
Summary: This study proposes a novel eddy-current-based tuned inerter damper that integrates tuned inerter damper and nonlinear eddy current damping. The mechanical model and configuration of the damper are introduced, and a closed-form solution for its optimal design is established. Numerical simulations and comparisons demonstrate the superior effectiveness of the damper in mitigating seismic response compared to other types of dampers.
NONLINEAR DYNAMICS
(2023)
Article
Engineering, Civil
Jean Paul Irakoze, Shujin Li, Wuchuan Pu, Patrice Nyangi, Amedee Sibomana
Summary: This study investigates the use of a negative stiffness tuned inerter damper system to improve the performance of a base-isolated structure. An optimization method based on performance criteria is developed to find the optimal parameters for the system. Numerical analyses and comparative analysis demonstrate that the negative stiffness tuned inerter damper system outperforms other systems in reducing the dynamic seismic response of the base-isolated structure.
EARTHQUAKES AND STRUCTURES
(2023)
Article
Engineering, Civil
Rushil Mojidra, Jian Li, Ali Mohammadkhorasani, Fernando Moreu, Caroline Bennett, William Collins
Summary: A computer vision-based fatigue crack detection approach using a short video recorded under live loads by a moving consumer-grade camera is presented. Global motion compensation techniques are introduced to compensate for camera-induced movement, which can create false detection results. The proposed methodology is validated using two laboratory test setups and shows the importance of motion compensation for both 2D and 3D videos.
EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION
(2023)
Article
Engineering, Civil
Wenzhi Zheng, Ping Tan, Jian Li, Hao Wang, Yanhui Liu, Kui Yang
Summary: This study proposes a novel superelastic pendulum isolator with variable stiffness (SPIVS) equipped with copper-based shape memory alloy (CuSMA) to enhance the seismic resilience of bridges against near-fault earthquakes. The sensitivity of the novel SPIVS to outside temperature effects is considered. The seismic performance of the proposed SPIVSs for bridges is assessed by conducting case studies, and the feasibility and effectiveness of the system are discussed and demonstrated.
ENGINEERING STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Yan-Wei Xu, Zhao-Dong Xu, Rui-Li Zhao, Zhi-Hao Wang, Yang Li, Chen Zhu
Summary: Currently, the vibration control of stay cable faces challenges such as low damping effectiveness and poor modal compatibility. In this study, a practical semi-active magnetorheological (MR) damper based control solution is proposed to address these problems. The proposed time-varying model exhibits more details of the damping force and the nonlinear response of the damped stay cable, showing its essential role in the optimal design of MR-PNS scheme. Simulation results demonstrate that the optimal designed multi-modal MR-PNS scheme can achieve higher damping efficiency and modal compatibility compared to the passive multi-modal damping solution.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2023)
Article
Engineering, Civil
Zhihao Wang, Jinlong Wen, Chen Kou, Hongyuan Huo, Aijiu Chen, Buqiao Fan
Summary: This study investigates the vertical human-structure interaction in lightweight footbridges, specifically focusing on the effects of standing pedestrians and moving pedestrians on a steel-glass composite footbridge model. Experimental results show that the effects of standing and moving pedestrians on the structural natural frequencies are different. The Fourier spectrum of the footbridge is sensitive to the relationship between the natural frequency of the coupled system and the walking frequency of the moving pedestrian. The study presents a theoretical model that accurately predicts vertical dynamic responses and clarifies the relative relationship between the footbridge and the standing pedestrian.
Article
Engineering, Civil
Wenzhi Zheng, Ping Tan, Jian Li, Hao Wang, Yanhui Liu, Zhibin Xian
Summary: This study develops a novel superelastic pendulum isolator with multi-stage variable curvature (SPIVC) to enhance the seismic resilience of the cold-regional bridges. The SPIVC system combines improved conical friction pendulum bearings (CFPB) and recentering devices made of copper-based shape memory alloy (CuSMA). With the optimum parameters determined based on the hysteretic characteristics of the re-centering device, the SPIVC system can provide both deformation accommodation and seismic isolation performance for bridges in cold regions.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Mechanical
Yun Liu, Hao Wang, Zidong Xu, Jian Li, Tong Wu, Jianxiao Mao
Summary: In this paper, a correlated-turbulence wave number-frequency spectral representation method (CT-WSRM) is proposed for simulating turbulent wind fields. Turbulent spectra that consider the correlation of turbulence are established using wind data measured during Typhoon Yanhua at the Ma'anshan Yangtze River (MYR) Bridge site in China. The proposed method can be utilized to simulate multidimensional multivariate two dimensional-three variate (2D-3V) spatial-temporal turbulent wind fields. This method can be further utilized in the dynamic reliability analysis, providing structural reliability evaluation from the probabilistic view.
JOURNAL OF ENGINEERING MECHANICS
(2023)
Article
Engineering, Multidisciplinary
Emmanuel Ogunniyi, Alexander Vareen, Austin R. J. Downey, Simon Laflamme, Jian Li, Caroline Bennett, William Collins, Hongki Jo, Alexander Henderson, Paul Ziehl
Summary: Damage to bridges can lead to fatal structural failures. Monitoring and detecting cracks in concrete infrastructure is important for reducing these risks, but it can be expensive due to the number of sensors required. This study explores the use of rubber isolators to reduce the capacitive coupling between concrete and sensors, and demonstrates accurate strain monitoring with the SEC sensor on concrete beams and bridge decks.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Simon Laflamme, Filippo Ubertini, Alberto Di Matteo, Antonina Pirrotta, Marcus Perry, Yuguang Fu, Jian Li, Hao Wang, Tu Hoang, Branko Glisic, Leonard J. Bond, Mauricio Pereira, Yening Shu, Kenneth J. Loh, Yang Wang, Siqi Ding, Xinyue Wang, Xun Yu, Baoguo Han, Yiska Goldfeld, Donghyeon Ryu, Rebecca Napolitano, Fernando Moreu, Giorgia Giardina, Pietro Milillo
Summary: Structural health monitoring (SHM) is the automation of assessing the condition of engineered systems. The challenge lies in designing cost-effective sensing solutions for large components or structures, and the implementation of these solutions is still limited due to economic and technical challenges.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Zhi-hao Wang, Zhi-peng Cheng, Guang-zhao Yin, Wenai Shen
Summary: Previous studies have shown that using passive control devices such as negative stiffness dampers (NSDs) and inertial mass dampers (IMDs) can effectively reduce vibration in stay cables. This study proposes a novel passive control device called magnetic negative stiffness eddy-current inertial mass damper (MNS-ECIMD) for cable vibration mitigation, which combines the advantages of both dampers. The performance of the MNS-ECIMD is validated through mechanical modeling and small-scale prototype testing, and its effect on cable vibration mitigation is analyzed through parametric analysis and numerical simulation.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
Sdiq Anwar Taher, Jian Li, Huazhen Fang
Summary: This paper investigates the simultaneous real-time input and state estimation and optimal sensor placements in systems without direct feedthrough. The paper proposes an optimal sensor placement algorithm (OSPA) to ensure the required system conditions are met, which is integrated with two optimal real-time filters – minimum-variance unbiased input and state estimation filter (MVUIS) and Augmented State Kalman Filter (ASKF). The developed OSPA along with the MVUIS and ASKF provide accurate and stable estimations in real-time, improving performance and reducing errors. Numerical, experimental, and real-world studies validate the effectiveness of the proposed approach.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Construction & Building Technology
Zhihao Wang, Yuxiang Zhou, Chuangjie Fang, Jingwen Zhang
Summary: In recent years, various types of damped outrigger systems, especially those with negative stiffness devices, have been proven effective in reducing excessive vibration caused by earthquakes and wind. This paper proposes a stochastic optimization method to study the optimal configurations of combined negative stiffness damped outriggers (NSDOs) and conventional damped outriggers (CDOs) under nonstationary stochastic seismic excitation. By using simplified analysis models and state-space representation, the paper investigates the sensitivity of negative stiffness devices on optimal objectives. The results demonstrate the efficacy of the proposed method and provide insights into the systems subjected to nonstationary seismic excitation.
STRUCTURAL CONTROL & HEALTH MONITORING
(2023)
Article
Construction & Building Technology
Wenzhi Zheng, Ping Tan, Jian Li, Hao Wang, Yanhui Liu, Zhibin Xian
Summary: A novel superelastic conical friction pendulum isolator (SCFPI) is developed by combining an improved conical friction pendulum isolator (CFPI) with shape memory alloy (SMA) to improve the seismic performance of bridges. The SCFPI system is designed with a flat sliding function to enhance adaptability under service loadings. The study proposes a cost-effective design method and conducts case studies to demonstrate the effectiveness of the SCFPI system and design method under near-fault ground motions.
STRUCTURAL CONTROL & HEALTH MONITORING
(2023)
Article
Construction & Building Technology
Sheng Sun, Xiaoyan Han, Aijiu Chen, Qing Zhang, Zhihao Wang, Keliang Li
Summary: Recycling scrap tires as a substitute for fine aggregates in the production of rubberized concrete can significantly enhance concrete frost resistance, protect the environment, and conserve natural sand and gravel resources. This study investigated the compressive strength of 25 groups of rubberized concrete during freeze-thaw cycles, which were produced by adding scrap tire rubber particles of different sizes, contents, and pretreatment methods. The results showed that the presence of rubber particles notably restricted the decrease in concrete strength and weight during freeze-thaw cycles. A forecast model for rubberized concrete compressive strength in freeze-thaw cycles was proposed, considering the effects of the particle size, content, and pretreatment of the rubber particles.
INTERNATIONAL JOURNAL OF CONCRETE STRUCTURES AND MATERIALS
(2023)
Article
Construction & Building Technology
Zhihao Wang, Luyao Song, Zhipeng Cheng, Hui Yang, Jinlong Wen, Meng Qi
Summary: This study aims to develop an accurate finite element (FE) modeling method to evaluate the structural vibration serviceability of a suspended floor under human-induced excitation. Through field tests, the dynamic characteristics and vibration response of the suspended floor were measured. Equivalent FE models were established and their applicability was verified by comparing the predicted results with field test data. Passive tuned mass dampers (TMDs) were designed and tested for vibration control of the suspended floor. Results show that the simplified local equivalent FE model can effectively evaluate the vibration serviceability of the suspended floor with and without TMDs.
Article
Acoustics
Yang Liu, Yan-wei Xu, Zhi-hao Wang
Summary: This study proposes using internal high damping rubber dampers and external negative stiffness dampers to control the multi-mode vibration of long stay cables. Through complex modal analysis and parametric studies, different coupling schemes are found to provide better control effects in different modal ranges, offering a diversified solution for multi-mode damping enhancement.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2023)
Article
Engineering, Mechanical
Rosaria Del Toro, Maria Laura De Bellis, Marcello Vasta, Andrea Bacigalupo
Summary: This article presents a multifield asymptotic homogenization scheme for analyzing Bloch wave propagation in non-standard thermoelastic periodic materials. The proposed method derives microscale field equations, solves recursive differential problems within the unit cell, establishes a down-scaling relation, and obtains average field equations. The effectiveness of this approach is validated by comparing dispersion curves with those from the Floquet-Bloch theory.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Yue Bao, Zhengcheng Yao, Yue Zhang, Xueman Hu, Xiandong Liu, Yingchun Shan, Tian He
Summary: This paper proposes a novel triple-gradient phononic acoustic black hole (ABH) beam that strategically manipulates multiple gradients to enhance its performance. The study reveals that the ABH effect is not solely brought about by the thickness gradient, but also extends to the power-law gradients in density and modulus. The synergistic development of three different gradient effects leads to more pronounced and broader bandgaps in PCs.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Matthias Ryser, Jason Steffen, Bekim Berisha, Markus Bambach
Summary: This study investigates the feasibility of replacing complex experiments with multiple simpler ones to determine the anisotropic yielding behavior of sheet metal. The results show that parameter identifiability and accuracy can be achieved by combining multiple specimen geometries and orientations, enhancing the understanding of the yield behavior.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Wenjun Li, Pengfei Zhang, Siyong Yang, Shenling Cai, Kai Feng
Summary: This study presents a novel two-dimensional non-contact platform based on Near-field Acoustic Levitation (NFAL), which can realize both one-dimensional and two-dimensional transportation. Numerical and experimental results prove the feasibility and ease of this method.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Shuo Liu, Lu Che, Guodong Fang, Jun Liang
Summary: This study presents a novel lamina conjugated bond-based peridynamic (BB-PD) model that overcomes the limitations of material properties and is applicable to composite laminates with different stacking sequences. The accuracy and applicability of the model are validated through simulations of elastic deformation and progressive damage behavior, providing an explanation of the damage modes and failure mechanisms of laminated composite materials subjected to uniaxial loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Omar El-Khatib, S. Kumar, Wesley J. Cantwell, Andreas Schiffer
Summary: Sandwich-structured honeycombs (SSHCs) are hierarchical structures with enhanced mass-specific properties. A model capable of predicting the elastic properties of hexagonal SSHCs is presented, showing superior in-plane elastic and shear moduli compared to traditional honeycombs, while the out-of-plane shear moduli are reduced.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Zhi-Jian Li, Hong-Liang Dai, Yuan Yao, Jing-Ling Liu
Summary: This paper proposes a process-performance prediction model for estimating the yield strength and ultimate tensile strength of metallic parts fabricated by powder bed fusion additive manufacturing. The effect of main process variables on the mechanical performance of printed metallic parts is analyzed and the results can serve as a guideline for improvement. The accuracy of the proposed model is validated by comparison with literature.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Saman A. Bapir, Kawa M. A. Manmi, Rostam K. Saeed, Abdolrahman Dadvand
Summary: This study numerically investigates the behavior of an ultrasonically driven gas bubble between two parallel rigid circular walls with a cylindrical micro-indentation in one wall. The primary objective is to determine the conditions that facilitate the removal of particulate contamination from the indentation using the bubble jet. The study found that the bubble jet can effectively remove contamination from the indentation for certain ranges of indentation diameter, but becomes less effective for larger indentation diameters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
E. Polyzos, E. Vereroudakis, S. Malefaki, D. Vlassopoulos, D. Van Hemelrijck, L. Pyl
Summary: This research investigates the elastic and damage characteristics of individual composite beads used in 3D printed composites. A new analytical probabilistic progressive damage model (PPDM) is introduced to capture the elastic and damage attributes of these beads. Experimental results show strong agreement with the model in terms of elastic behavior and ultimate strength and strain.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
