Article
Engineering, Civil
Rujin Ma, Fangkuan Li, Xiaohong Hu, Baixue Ge, Qifeng He
Summary: This study investigated the vortex-induced vibration (VIV) performance of a twin-box girder with large cantilever plates through wind tunnel tests. The effects of increasing the damping ratio and installing various conventional aerodynamic countermeasures were also studied. The results showed that increasing the damping ratio and installing conventional aerodynamic countermeasures were not effective in suppressing the VIV response of the twin-box girder, while the attachments on the upper surface had a more significant effect. It was further demonstrated that the L-shaped windshield is an effective countermeasure that can completely suppress the vertical VIV of the twin-box girder.
Article
Engineering, Civil
T. Argentini, D. Rocchi, C. Somaschini, U. Spinelli, F. Zanelli, A. Larsen
Summary: This paper compares three different approaches to assess the aerodynamic stability of twin-box decks: experimental free-motion tests, numerical simulations using quasi-steady theory, and numerical simulations using flutter derivatives. By comparing the results of different deck configurations, it is found that even though they are geometrically very similar, their aeroelastic behavior differs significantly in terms of critical flutter speed, eigenvalue/eigenvector trend, and static deformation. Each method has its advantages and disadvantages, which are highlighted and discussed throughout the paper.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2022)
Article
Environmental Sciences
Yuhui Fan, Jingwen Lu, Lei Wang
Summary: This research investigates the cross-wind aeroelastic effects of tall buildings with hexagonal cross-sections. Wind tunnel tests were conducted to measure the cross-wind displacement and acceleration responses at the top of each model. The study identified the aerodynamic damping ratios for two representative wind directions and determined the presence of vortex-induced vibrations.
Article
Engineering, Marine
Shi Deng, Yuwang Xu, Haojie Ren, Shixiao Fu, Shuai Li, Torgeir Moan, Zhen Gao
Summary: The study focuses on the potential pontoon-supported curved submerged floating tunnel designed for crossing Sognefjorden, considering wave-induced hydroelastic response and flow-induced vibrations. Short-crested waves and strong flow conditions are found to significantly affect the design, particularly in extreme conditions.
Article
Engineering, Civil
Francesca Lupi, Ruediger Hoeffer, Hans-Juergen Niemann
Summary: The paper investigates the negative aerodynamic damping of circular cylinders in vortex-induced vibrations and compares the results of two different types of wind tunnel experiments. The forced-vibration wind tunnel tests and aeroelastic experiments are conducted to measure aerodynamic damping directly from the experiments and verify the reliability of the proposed aerodynamic damping model and the effectiveness of the Vickery&Basu spectral model to predict vortex-induced vibrations.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2021)
Article
Engineering, Mechanical
Guangzhong Gao, Ledong Zhu, Jiawu Li, Wanshui Han, Libo Wei, Qingchen Yan
Summary: This study investigates the post-flutter bifurcation behavior of a twin-box bridge deck and finds that the aerodynamic nonlinearities significantly affect the stability of the bridge deck. A novel wind-tunnel technique is used to measure the aerodynamic force during post-flutter oscillations, and a corresponding nonlinear model is proposed to describe the observed behavior.
JOURNAL OF FLUIDS AND STRUCTURES
(2022)
Article
Construction & Building Technology
Ze Xu, Jiangjiang Yin
Summary: In order to investigate the wind-induced response and equivalent wind load of a super-tall building, an aeroelastic model was designed to measure aerodynamic interference in wind tunnel tests. The experiments included pressure and vibration measurements in both uniform and turbulent wind fields, recording displacement response and surface wind pressure at different locations of the model. The research showed that the mean displacement responses in different wind attack angles gradually increased and the fluctuating wind pressure became more significant in turbulent fields.
Article
Engineering, Mechanical
Raphael Dubois, Thomas Andrianne
Summary: Wind tunnel experiments were conducted on twin rough cylinders with a spacing ratio of L/D=1.2, measuring the unsteady flow field at two Reynolds numbers corresponding to sub- and post-critical flow regimes. The study revealed the existence of three flow behaviors and bi-stabilities, with the flow regime depending on the wind incidence angle. A methodology was proposed to decouple the intermittently occurring modes, allowing for the identification of each mode's flow behavior.
JOURNAL OF FLUIDS AND STRUCTURES
(2023)
Article
Engineering, Civil
Xin Chen, Cunming Ma, Rong Xian, Tiancheng Liu
Summary: In this study, the effect of gap configuration on the vortex-induced vibration (VIV) of a twin-box girder was investigated through wind tunnel tests and numerical simulations. The results showed that the gap configuration significantly affected the VIV response, and a proposed flow splitter plate device efficiently suppressed the VIV.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2022)
Article
Chemistry, Multidisciplinary
Chaoqun Wang, Xugang Hua, Zhiwen Huang, Qing Wen
Summary: Research has been conducted on the aerodynamic characteristics of coupled twin cylinders in cross flow and their effects on synchronous galloping. Experimental results show that there are two typical flow patterns around twin cylinders with different spacing, and there is a critical spacing below which vortex shedding of the upstream cylinder is suppressed by the downstream cylinder. This leads to a peak in total lift force for the twin cylinders.
APPLIED SCIENCES-BASEL
(2021)
Article
Construction & Building Technology
Youchan Hwang, Jae-Hong Shim, Oh-Sung Kwon, Ho-Kyung Kim
Summary: The conventional spring-supported section model test is effective but has limitations in selecting the model scale and requires calibration and modification of dynamic properties. This study proposes a new real-time aeroelastic hybrid simulation approach that directly measures the aeroelastic force on the physical model, eliminating the potential drawbacks of the conventional approach.
JOURNAL OF STRUCTURAL ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Shuichi Hiramatsu, Masayuki Anyoji, Koji Fujita, Hiroki Nagai, Akira Oyama, Hiroyuki Kato
Summary: This study presents a method for measuring aerodynamic deformation of a fixed-wing aircraft MABE2 using stereophotogrammetry in high-altitude flight tests, demonstrating high measurement accuracy. Despite slight deflection of up to 4mm observed on the main wing, the overall stability of the wings was maintained, confirming the practicality of the technique for real aircraft aerodynamic deformation measurement.
ENGINEERING RESEARCH EXPRESS
(2021)
Article
Engineering, Civil
Wei-feng Qin, Jun-yang Shi, Xiaoyue Yang, Jiming Xie, Steve Zuo
Summary: The study found that the aerodynamic interference between twin towers can disrupt vortex shedding and reduce across-wind oscillation compared to a single tower. Structural links between twin towers can effectively control wind-induced structural responses and lessen wind loads and building accelerations by more than 20%.
ENGINEERING STRUCTURES
(2022)
Article
Metallurgy & Metallurgical Engineering
Yang Ling-bo, Hua Xu-gang, Wang Chao-qun, He Dong-sheng, Chen Zheng-qing
Summary: Wind tunnel tests were conducted to investigate the aerodynamic interference between a triple-box girder and trains. The results showed that the interference had a significant impact on the static aerodynamic forces of both the girder and trains, and it caused vibration of the trains, which was unfavorable for safety and comfort.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Engineering, Civil
Lulu Liu, Yunfeng Zou, Xuhui He, Xuhong Zhou, Chenzhi Cai, Jiafeng Yang
Summary: Wind barriers are commonly used on railway bridges to enhance the safety of high-speed trains. The impact of these wind barriers on the Vortex-induced vibration (VIV) of separated rail-cum-road bridges is not fully understood, particularly due to the aerodynamic interference effect (AIE). Experimental tests were conducted to evaluate the VIV performance of different wind barriers on railway decks. The results showed that wind barriers can effectively suppress VIV of the railway decks but also have a significant influence on the adjacent highway decks. Based on a comprehensive evaluation, wind barriers with a height (H) of 3 m and a ventilation ratio (R) of 30% were recommended to meet the requirements of twin decks.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2023)
Article
Engineering, Civil
Ning Su, Shitao Peng, Ningning Hong
Summary: This study analyzed the wind-induced sliding force and overturning moment responses of quayside container cranes under dynamic transient gusty wind, and quantified the amplification factors on the dynamic responses. Through Monte Carlo simulation, the stochastic characteristics of the peak dynamic wind-induced responses were determined, considering different transient gusty wind parameters.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2021)
Article
Engineering, Civil
Ning Su, Shitao Peng, Yasushi Uematsu
Summary: In this study, wind tunnel tests were conducted on spherical storage tanks to analyze the aerodynamic drag and uplift coefficients, as well as wind pressure distributions, which are significantly affected by the Reynolds number. It was found that in atmospheric boundary layer flow, when the surface roughness of the tank is higher, the aerodynamic behavior can be accurately simulated with lower Reynolds number.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2021)
Article
Engineering, Civil
Ning Su, Yi Xia, Shitao Peng
Summary: This paper investigates the vibration control of Tuned Mass Damper Inerter (TMDI) subjected to wind and seismic loads, obtaining closed-form solutions of the control performance via a filter approach. Empirical formulas for determining optimal design parameters based on mass ratio, inerter inertance ratio, and inerter location parameter are proposed, and an inerter dependence analysis is conducted by comparing the optimal control performance of TMDI with traditional TMD.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Liang Liu, Ying Sun, Ning Su, Yue Wu, Shitao Peng
Summary: This study investigates the wind pressure on cylindrical storage tanks with different aspect ratios (H/D = 0.2-1.5) under varying Reynolds numbers and flow field conditions. It reveals that the three-dimensional characteristics of the aerodynamic loads are attenuated or even disappear gradually as the aspect ratio decreases, and the transition of separation occurs at lower Reynolds numbers compared to two-dimensional cylinders.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2022)
Article
Engineering, Mechanical
Ning Su, Jing Bian, Shitao Peng, Yi Xia
Summary: In this paper, a generic optimal design approach for various Inerter-based tuned mass systems (ITMSs) is proposed. The approach provides a basic framework to systematically evaluate and compare the control performance of different ITMSs by parametrically describing them, deriving optimal solutions, and forming empirical formulas. Through a case study, the applicability and effectiveness of the proposed design approach are validated.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Ning Su, Jing Bian, Shitao Peng, Yi Xia
Summary: This paper investigates the vibration control performance of tuned viscous mass damper (TVMD) for impulsive stochastic excitations. The stability maximization (SM) method is proposed and compared with H infinity optimization.The study proposes an integrated optimization procedure and establishes empirical formulas for the optimal TVMD design. A numerical example validates the effectiveness of the proposed method and formulas.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Xiaotong Wu, Ying Sun, Yue Wu, Ning Su, Shitao Peng
Summary: This study investigates the effects of wind on container cranes and finds that the interference effect mainly acts as a shielding effect, reducing the wind loads and response of the structures.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Ning Su, Shitao Peng, Ningning Hong, Yi Xia
Summary: This paper investigates the optimization design and control performance of the inerter-based double tuned mass dampers (IDTMD), proposes empirical formulas, evaluates the weight reduction and control performance of IDTMD, and validates the proposed formulas. Compared to TMD with similar control performance, IDTMD can reduce the tuning mass by 24%.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Zhaoqing Chen, Weijie Cai, Jin Su, Bo Nan, Cong Zeng, Ning Su
Summary: The galloping mechanism of ice-covered four-split transmission lines in oblique flows is investigated through wind tunnel tests. The results show that the crescent-shaped ice-covered four-split transmission lines usually suffer from torsional galloping, and the galloping is more prone to occur under oblique flows. These research findings are significant for verifying the fluid-structure interaction simulation method of ice-covered transmission lines.
Article
Engineering, Mechanical
Ning Su, Jing Bian, Shitao Peng, Zhaoqing Chen, Yi Xia
Summary: In recent years, negative stiffness (NS) has been used in dynamic vibration absorbers (DVAs) to improve control performance on dynamic responses. However, the use of NS may increase static response. The optimal design of tuned mass damper with negative stiffness (NS-TMD) is investigated in this paper to address this issue and consider the impact of installation location on performance and design process. The proposed design method considers arbitrary installation locations and the balance of dynamic and static performances, leading to promising results in terms of control rates and weight reduction for slender structures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Ning Su, Jing Bian, Shitao Peng, Zhaoqing Chen, Yi Xia
Summary: This paper investigates the performance of negative stiffness dynamic vibration absorbers (NS-DVAs) for controlling dynamic excitations and proposes an analytical optimal design approach for balancing the static amplification and dynamic reduction effects. The characteristics of static amplification and dynamic reduction factors are analyzed, and a control performance factor on the peak response is defined and optimized. The effectiveness of the proposed approach is illustrated through a numerical example for wind-induced vibration control.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
Ning Su, Jing Bian, Zhaoqing Chen, Yi Xia
Summary: A novel Lever-type Inerter-based Vibration Absorber (LIVA) is proposed in this study, which is based on a lever supported on a flexible auxiliary structure connecting between the primary structure and a paralleled inerterdashpot system. The optimal parameters for the LIVA are derived based on analytical H infinity and H2 optimization. The influences of parameters on optimal parameters and control performance of the LIVA are systematically investigated. Furthermore, the vibration absorption performance of the LIVA is compared with traditional TMD and another lever-type vibration absorber through time domain analysis subjected to a recent earthquake event.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Construction & Building Technology
Zhaoqing Chen, Chao Wei, Zhenmin Li, Cong Zeng, Junbin Zhao, Ningning Hong, Ning Su
Summary: This paper presents the wind-induced responses and wind-resistant design method of spherical inflatable membrane structures. Through nonlinear dynamic time-history analysis, considering the influences of spans, rise-span ratios, internal pressures, wind velocities, and cable configurations, the characteristics of wind-induced responses are studied. The results show that wind velocity affects the position of maximum displacement and increasing internal pressure can reduce deflection but increase membrane stress. Furthermore, a wind-resistant design method using equivalent static analysis is developed and empirical formulas and recommendation values are provided for engineering reference.
Article
Construction & Building Technology
Zhaoqing Chen, Yong Su, Junchao Wang, Ning Su, Lixiang Tang
Summary: This paper investigates the displacement and strain response characteristics of spherical inflatable membrane structures under wind loads using digital image correlation technology (DIC). The aeroelastic instability characteristics and criteria for determining the occurrence of this phenomenon are defined. The results show that the structure undergoes a sudden change in dominant vibration mode and a rapid decay of the damping ratio after wind speed exceeds the critical value. The instability of the structure is caused by vortex-induced resonance and is characterized by a sudden increase in deformation, a sudden change in dominant vibration mode, and a rapid decay of the damping ratio. The Reynolds number after reaching the instability critical wind speed is Re > 3.1 x 10^5.
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)
