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学者姓名：李栋
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Abstract ：
Under typhoon attack, slender and lightly damped offshore wind turbine systems are prone to significantly exacerbated aeroelastic dynamic responses and increased structural instability risks, potentially leading to damage or collapse. To address the complex vibration challenges in multi-mode and multi-directional systems, this paper proposes a dual-track nonlinear energy sink (NES) and establishes a theoretical model for the wind turbine tower system coupled with the dual-track NES, incorporating blade rotation and vortex shedding effects. A comprehensive optimization of the dual-track NES is conducted to determine the optimal track profiles and damping ratios. An aeroelastically scaled model of the wind turbine tower system is designed and tested in typhoon fields simulated in wind tunnels. The effectiveness of the dual-track NES is evaluated under various conditions by analyzing acceleration time-history responses, displacement trajectories, frequency, and damping ratios. Experimental results demonstrate that the dual-track NES can effectively suppress the tower's response in both alongwind and crosswind directions, with the displacement trajectory significantly narrowed, eigenvalues of displacement power spectral density reduced in orders, and damping ratio increased up to five times. Notably, under resonance conditions, the acceleration response is reduced by up to 97.1%, while in non-resonance conditions, the reduction can reach up to 79.4%. This innovative approach provides a promising solution for mitigating typhoon-induced multimodal resonances and avoiding dynamic instabilities in offshore wind turbine systems.
Keyword ：
Energy dissipation Energy dissipation nonlinear energy sink nonlinear energy sink structural dynamics structural dynamics wind tunnel tests wind tunnel tests wind turbine tower wind turbine tower
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| GB/T 7714 | Li, Dong , Fang, Shijing , Zhang, Zhengyu et al. Dual-Track Nonlinear Energy Sinks for Mitigating Bi-Directional Vibration of Wind Turbine Towers in Typhoons [J]. | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS , 2025 . |
| MLA | Li, Dong et al. "Dual-Track Nonlinear Energy Sinks for Mitigating Bi-Directional Vibration of Wind Turbine Towers in Typhoons" . | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS (2025) . |
| APA | Li, Dong , Fang, Shijing , Zhang, Zhengyu , Wu, Keda , Zhao, Jie , Dai, Yiqing . Dual-Track Nonlinear Energy Sinks for Mitigating Bi-Directional Vibration of Wind Turbine Towers in Typhoons . | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS , 2025 . |
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Steel-ultra-high performance concrete (UHPC) composite walls can use high-strength tie bars (HBs) as shear connectors to satisfy the increased requirement of interfacial shear resistance. However, there is a lack of research on the shear behavior of HBs embedded in UHPC. To address it, this paper conducts 33 push-out tests, considering the effects of the following six parameters: yield stress and thickness of steel plates, yield stress and diameter of tie bars, and compressive strength and fiber content of concrete. Test results demonstrate that: (i) the failure modes include shear failure of tie bars (for specimens using UHPC with steel fibers) and splitting failure of concrete (for the other specimens), these are different from the traditional failure modes of shear studs embedded in conventional-strength concrete and should be considered in design; and (ii) using UHPC or using tie bars with higher yield stress or larger diameters can remarkably improve the shear strength. The applicability of current design equations to estimate the shear strength of HBs embedded in concrete is also evaluated. It is shown that the accuracy of current design equations depends on the governing failure mode. When tie bar shear failure governs, AASHTO LRFD (AASHTO 2012) can accurately estimate the strength, while the other equations are quite conservative; when concrete splitting failure governs, all equations seem unconservative as they are based on concrete compression failure.
Keyword ：
High-strength High-strength Push-out test Push-out test Shear stiffness Shear stiffness Shear strength Shear strength Tie bar connector Tie bar connector UHPC UHPC
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| GB/T 7714 | Lai, Zhichao , Weng, Xiangyu , Li, Dong et al. Shear behavior of high-strength tie bar connectors embedded in UHPC [J]. | STRUCTURES , 2025 , 72 . |
| MLA | Lai, Zhichao et al. "Shear behavior of high-strength tie bar connectors embedded in UHPC" . | STRUCTURES 72 (2025) . |
| APA | Lai, Zhichao , Weng, Xiangyu , Li, Dong , Li, Langfu . Shear behavior of high-strength tie bar connectors embedded in UHPC . | STRUCTURES , 2025 , 72 . |
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For medium and small-scale steel structure stadiums, in order to minimize the impact of the construction process on the structural state, a prestressing construction process tailored to medium and small stadiums is proposed, taking full advantage of the inherent elastic deformation range of steel structures. The main steps of the process involve the construction of the main truss first. After the main truss construction is completed, it is lowered to a certain position within its elastic range using cables. The roof grid is then connected to the main truss. Once all connections are completed, the cable tension is gradually released. After the cable tension is released, the main truss exhibits a certain degree of rebound. During the rebound process, the roof grid forms a prestressed structure, ensuring stability and integrity between the main truss and the roof. Through numerical simulation, process analysis is conducted on this construction process, and the optimal construction scheme is proposed.
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| GB/T 7714 | Yao, Wang , Hao, Zhang , Feng, Zhang et al. Construction Method and Process Optimization of Prestress Reverse Tensioning for Large-Span Bidirectional Suspension Steel Roof Structures [J]. | ADVANCES IN CIVIL ENGINEERING , 2024 , 2024 . |
| MLA | Yao, Wang et al. "Construction Method and Process Optimization of Prestress Reverse Tensioning for Large-Span Bidirectional Suspension Steel Roof Structures" . | ADVANCES IN CIVIL ENGINEERING 2024 (2024) . |
| APA | Yao, Wang , Hao, Zhang , Feng, Zhang , Yang, Li , Dong, Li , Min, Bao . Construction Method and Process Optimization of Prestress Reverse Tensioning for Large-Span Bidirectional Suspension Steel Roof Structures . | ADVANCES IN CIVIL ENGINEERING , 2024 , 2024 . |
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High-strength steel and ultra-high-performance concrete (UHPC) can increase structural resistance and reduce material consumption efficiently. However, current design specifications do not permit the use of them in concrete-filled steel tube members due to the lack of research. To address it, this paper experimentally investigates the shear behavior of square ultra-high performance concrete-filled high-strength steel tube (referred to as CuFTh hereafter) members. A total of 20 CuFTh specimens were tested, considering the effects of the span-todepth ratio, width-to-thickness ratio of the steel tube, yield stress of steel, and fiber volume content of UHPC. The test results showed that: (i) the failure mode was governed by the shear span-to-depth ratio (a/H), including shear failure (a/H = 0.2 or 0.5) and combined shear-flexural failure (a/H = 0.8 or 1.0); (ii) the shear strength increased with decreasing shear span-to-depth ratio and the width-to-thickness ratio of the steel tube; (iii) increasing the yield stress of steel and fiber volume content of UHPC improved the shear strength. The applicability of current specifications for estimating the shear strength of square CuFTh members was evaluated. It was shown that CECS 28 (CECS 2012) had the most reasonable estimation.
Keyword ：
Concrete-filled steel tube Concrete-filled steel tube Design Design Experimental tests Experimental tests High-strength steel High-strength steel Shear behavior Shear behavior Ultra-high performance concrete (UHPC) Ultra-high performance concrete (UHPC)
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| GB/T 7714 | Lai, Zhichao , Wang, Jiali , Chen, Xiwen et al. Shear behavior of square ultra-high performance concrete-filled high-strength steel tube members [J]. | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 212 . |
| MLA | Lai, Zhichao et al. "Shear behavior of square ultra-high performance concrete-filled high-strength steel tube members" . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 212 (2024) . |
| APA | Lai, Zhichao , Wang, Jiali , Chen, Xiwen , Li, Dong . Shear behavior of square ultra-high performance concrete-filled high-strength steel tube members . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 212 . |
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The efficient injection of fuel in the combustion chamber is significant for the advancement of the current supersonic vehicles. This study has focused on the role of non-alignment injector configuration on the fuel mixing of the hydrogen jet inside the combustion chamber of the scramjet engine. The fuel distribution and vortex generation behind both annular and coaxial jets are modeled and compared to disclose the mechanism of fuel diffusion in the combustion chamber. A three-dimensional model of two nozzle angles is produced to visualize the complicated flow interaction of four non-aligned circular jets at supersonic cross-flow. Our results indicate that the strength of the vortex pair produced by the core of the fuel jet is extended more when the angle of the nozzles is increased. The flow visualization of the jet also confirms that the flow becomes more complex in nonalignment jet configurations and fuel mixing is improved by the addition of the internal air jet in the suggested injection model.
Keyword ：
Combustion chamber Combustion chamber Hydrogen fuel jet Hydrogen fuel jet Mach Mach Scramjet engine Scramjet engine Supersonic flow Supersonic flow
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| GB/T 7714 | Wang, Haicui , Ma, Zhimin , Bian, Jing et al. Computational study of transverse oblique injectors for improvement of fuel mixing in scramjet engine of supersonic vehicles [J]. | ENERGY , 2024 , 306 . |
| MLA | Wang, Haicui et al. "Computational study of transverse oblique injectors for improvement of fuel mixing in scramjet engine of supersonic vehicles" . | ENERGY 306 (2024) . |
| APA | Wang, Haicui , Ma, Zhimin , Bian, Jing , Cao, Liang , Tan, Ji-Ke , Li, Dong . Computational study of transverse oblique injectors for improvement of fuel mixing in scramjet engine of supersonic vehicles . | ENERGY , 2024 , 306 . |
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An increasing number of civil structures are being built near or across earthquake faults, making them more susceptible to severe seismic damage due to the presence of large velocity pulses in near-fault ground motions (NFGMs). Because of limited availability of NFGMs records, synthesized NFGMs are necessary for seismic designing of structures located around near-fault areas. Based on the far-field synthesis of ground motions (GMs), various methods for synthesizing NFGMs by superimposing high-frequency and low-frequency components in the time domain have been developed. However, such techniques suffer from wider variation in the response spectrum between the synthesized NFGMs and the target spectrum. To address this issue, a new approach for synthesizing NFGMs has been proposed. This approach investigates key parameters of the response spectrum for NFGMs based on a comprehensive database. Similarly, the shortcomings in existing NFGM methods have been analyzed by evaluating a couple of criteria for the suitability of the synthesizing method. Two adjustment strategies have been developed to attain consistency in the response spectrum. The spectral characteristics can be maintained during the spectrum adjustment process to overcome limitations of existing methods. Synthesized specimen of NFGMs has been utilized to validate the effectiveness of the proposed approach.
Keyword ：
High-frequency components High-frequency components Improved methods Improved methods Near-fault ground motions (NFGMs) Near-fault ground motions (NFGMs) Pulse-like Pulse-like Response spectrum (RS) Response spectrum (RS)
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| GB/T 7714 | Zhang, Chao , Wu, Cheng , Wang, Piguang et al. Improved methods for synthesizing near-fault ground motions based on specific response spectrum [J]. | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2024 , 183 . |
| MLA | Zhang, Chao et al. "Improved methods for synthesizing near-fault ground motions based on specific response spectrum" . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 183 (2024) . |
| APA | Zhang, Chao , Wu, Cheng , Wang, Piguang , Li, Dong , Lu, Jianbin . Improved methods for synthesizing near-fault ground motions based on specific response spectrum . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2024 , 183 . |
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Wind loads in most random vibration studies are assumed to follow Gaussian processes, and reliability-based design is generally conducted based on moment methods to ensure structural survivability. However, membrane roofs under typhoon attacks are loaded by strong non-Gaussian random excitations. The contributions of the third-order moment (skewness) and fourth-order moment (kurtosis) to the structural reliability become more significant. This study investigated the stochastic dynamic response and reliability of hyperbolic parabolic membrane structures excited by non-Gaussian wind loads. Firstly, the Fokker-Planck-Kolmogorov (FPK) governing equation of membrane structures is established, with considerations of both geometric nonlinear stiffness and nonlinear motion-induced aerodynamic force. Then, the steady-state displacement response is analyzed in the slow-varying process of the system. Consequently, a series of analytical solutions, including probability density function (PDF), root mean square (RMS) value, skewness, and kurtosis, can be obtained. The accuracy of the proposed theoretical model is validated throughout a number of wind tunnel tests including various wind velocities and directions. The effects of geometric nonlinear stiffness term, nonlinear motion-induced aerodynamic force, reduced wind velocity and rise-span ratio on structural reliability are thoroughly discussed. The findings reveal that the structural extreme response shows strong non-Gaussian behavior, featured with skewness of -1.5 similar to 1.2 and kurtosis of 3.82 similar to 6.89. The influence of geometric nonlinear stiffness and nonlinear motion-induced aerodynamic force on structural reliability can reach up to 28.42 % and 29.84 %, respectively. Among various design parameters, the reduced wind velocity shows the most significant influence on structural reliability. In the probability-based design framework, the critical reduced wind velocity is identified as 1.2, and the critical rise-span ratio is recommended as 1/10. The research proposed in this paper provides an accurate analytical model for predicting the dynamic behavior of such flexible structures under typhoons.
Keyword ：
Geometric nonlinear stiffness Geometric nonlinear stiffness Membranes structures Membranes structures Nonlinear motion-induced aerodynamic force Nonlinear motion-induced aerodynamic force Structural reliability Structural reliability Typhoons Typhoons
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| GB/T 7714 | Li, Dong , Zhu, Qiyin , Shen, Renyang et al. Random vibration response and reliability analysis of hyperbolic parabolic membrane structures under typhoons [J]. | THIN-WALLED STRUCTURES , 2024 , 205 . |
| MLA | Li, Dong et al. "Random vibration response and reliability analysis of hyperbolic parabolic membrane structures under typhoons" . | THIN-WALLED STRUCTURES 205 (2024) . |
| APA | Li, Dong , Zhu, Qiyin , Shen, Renyang , Lu, Leiyu , Lai, Zhichao . Random vibration response and reliability analysis of hyperbolic parabolic membrane structures under typhoons . | THIN-WALLED STRUCTURES , 2024 , 205 . |
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Wind tunnel tests and numerical simulations are the mainstream methods to study the wind-induced vibration of structures. However, few articles use statistical parameters to point out the differences and errors of these two research methods in exploring the wind-induced response of membrane structures. The displacement vibration of a saddle membrane structure under the action of wind load is studied by wind tunnel tests and numerical simulation, and statistical parameters (mean, range, skewness, and kurtosis) are introduced to analyze and compare the displacement data. The most unfavorable wind direction angle is 0 degrees (arching direction). The error between experiment and simulation is less than 10%. The probability density curve has a good coincidence degree. Both the test and simulation show a certain skewed distribution, indicating that the wind-induced vibration of the membrane does not obey the Gaussian distribution. The displacement response obtained by the test has good stability, while the simulated displacement response has strong discreteness. The difference between the two research methods is quantitatively given by introducing statistical parameters, which is helpful to improve the shortcomings of wind tunnel tests and numerical simulations.
Keyword ：
numerical simulation numerical simulation saddle membrane structure saddle membrane structure statistical parameter statistical parameter wind-induced dynamic response wind-induced dynamic response wind tunnel test wind tunnel test
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| GB/T 7714 | Chen, Ziye , Liu, Changjiang , Li, Dong et al. Study on Wind-Induced Dynamic Response and Statistical Parameters of Skeleton Supported Saddle Membrane Structure in Arching and Vertical Direction [J]. | BUILDINGS , 2024 , 14 (5) . |
| MLA | Chen, Ziye et al. "Study on Wind-Induced Dynamic Response and Statistical Parameters of Skeleton Supported Saddle Membrane Structure in Arching and Vertical Direction" . | BUILDINGS 14 . 5 (2024) . |
| APA | Chen, Ziye , Liu, Changjiang , Li, Dong , Liu, Jian , Deng, Xiaowei , Luo, Chiyu et al. Study on Wind-Induced Dynamic Response and Statistical Parameters of Skeleton Supported Saddle Membrane Structure in Arching and Vertical Direction . | BUILDINGS , 2024 , 14 (5) . |
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This paper presents the wind tunnel test and numerical simulation on umbrella-shaped tensioned membrane structures to investigate the effects of both high wind velocity and various wind direction of typhoon on their aerodynamic behavior. Finite element models are also developed and benchmarked to further investigate the effects on rise-to-span ratio, wind attack angle, and pretension. Results from the experimental tests and finite element analyses show that: (i) the turbulence buffeting in the leeward surface is significant with large displacement responses, especially with the 0 degrees wind direction, large wind attack angle and high rise-to-span ratio; (ii) Non-Gaussian characteristics become remarkable with increasing skewness and kurtosis, which may be contributed by the high-level turbulence intensity in typhoons; and (iii) the effects of rise-to-span ratio, wind attack angle and pretension are proved more significant, which should be considered in the wind-resistance design of membrane structures in typhoons.
Keyword ：
aerodynamic behavior aerodynamic behavior coupled FSI simulation coupled FSI simulation typhoons typhoons umbrella-shaped membrane structures umbrella-shaped membrane structures wind tunnel test wind tunnel test
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| GB/T 7714 | Li, Dong , Zhang, Zhou , Qiu, Yi et al. Aeroelastic wind tunnel tests and numerical simulations on umbrella-shaped tensioned membrane structures in typhoons [J]. | WIND AND STRUCTURES , 2024 , 39 (5) : 313-327 . |
| MLA | Li, Dong et al. "Aeroelastic wind tunnel tests and numerical simulations on umbrella-shaped tensioned membrane structures in typhoons" . | WIND AND STRUCTURES 39 . 5 (2024) : 313-327 . |
| APA | Li, Dong , Zhang, Zhou , Qiu, Yi , Chen, Zhiwei , Lai, Zhichao . Aeroelastic wind tunnel tests and numerical simulations on umbrella-shaped tensioned membrane structures in typhoons . | WIND AND STRUCTURES , 2024 , 39 (5) , 313-327 . |
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Currently, the research on wind-induced response of membrane structures focuses on the normal wind field, and there is little research on typhoon with greater disaster. In this paper, the wind-induced response of saddle membrane structures under typhoon is studied by numerical simulation. Firstly, the wind field information of typhoon is simulated according to the Weather Research and Forecasting model, and the information is used as the inlet boundary condition of Computational Fluid Dynamics. The vibration modal analysis is carried out, considering the influence of wind field intensity, wind direction angle, rise-span ratio, and pretension on the displacement of the membrane. The results show that the probability density curve of wind-induced response has a certain skewness. The saddle membrane structure has the largest vibration amplitude of the membrane at 0 degrees wind direction angle, and the most unfavorable wind pressure value of the membrane is negative. In reducing the displacement of the membrane, the effect of reducing the wind-induced vibration response by increasing the rise-span ratio of the structure is better than that of the pretension. This paper reveals that the law of wind- induced response can provide a theoretical basis for the design of membrane structures against typhoons.
Keyword ：
Numerical simulation Numerical simulation Saddle membrane structure Saddle membrane structure Typhoon wind field Typhoon wind field Wind-induced response Wind-induced response
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| GB/T 7714 | Chen, Ziye , Liu, Changjiang , Huang, Weibin et al. Wind-induced response of saddle membrane structure under typhoon wind field by weather research and forecasting model and computational fluid dynamics [J]. | THIN-WALLED STRUCTURES , 2024 , 205 . |
| MLA | Chen, Ziye et al. "Wind-induced response of saddle membrane structure under typhoon wind field by weather research and forecasting model and computational fluid dynamics" . | THIN-WALLED STRUCTURES 205 (2024) . |
| APA | Chen, Ziye , Liu, Changjiang , Huang, Weibin , Bao, Wei , Li, Dong , Liu, Jian et al. Wind-induced response of saddle membrane structure under typhoon wind field by weather research and forecasting model and computational fluid dynamics . | THIN-WALLED STRUCTURES , 2024 , 205 . |
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