Query：
学者姓名：李栋
Refining：
Year
Type
Indexed by
Source
Complex
Co-
Language
Clean All
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
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
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
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
To explore the potential application of concrete-filled double-skin steel tubular (CFDST) structures in wind turbine towers, this study carried out wind tunnel tests to explore the aerodynamic behavior of CFDST tower-based wind turbine systems. Two scaled models including traditional steel tower-based and CFDST tower-based wind turbine systems were designed and tested in the field of typhoons. Then, the vibration characteristics in both the downwind and crosswind directions were systematically investigated, in terms of acceleration and displacement response, motion trajectory, dynamic characteristics, etc. The findings demonstrate that CFDST structures can have significantly improved performance against both blade harmonic excitation and external environmental excitation. Compared to traditional steel towers, CFDST towers exhibit a substantial reduction in aerodynamic response. In particular, the reduction in the RMS value can be over five times in the resonance case and 457.69% in the non-resonance case. The CFDST towers predominantly exhibited converged motion trajectory and concentrated on lower vibration modes. The energy dissipation capability was remarkably enhanced, with the damping ratio increasing up to 40.98%. Overall, it was experimentally demonstrated that CFDST towers can efficiently address the dynamic problems of large-scale wind turbine towers in engineering.
Keyword ：
aerodynamic behavior aerodynamic behavior CFDST CFDST typhoons typhoons wind tunnel tests wind tunnel tests wind turbine towers wind turbine towers
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Li, Dong , Sang, Yuan , Fang, Shijing et al. Wind Tunnel Test Research on the Aerodynamic Behavior of Concrete-Filled Double-Skin Steel (CFDST) Wind Turbine Towers [J]. | BUILDINGS , 2024 , 14 (8) . |
| MLA | Li, Dong et al. "Wind Tunnel Test Research on the Aerodynamic Behavior of Concrete-Filled Double-Skin Steel (CFDST) Wind Turbine Towers" . | BUILDINGS 14 . 8 (2024) . |
| APA | Li, Dong , Sang, Yuan , Fang, Shijing , Sun, Chuang , Wang, Haicui . Wind Tunnel Test Research on the Aerodynamic Behavior of Concrete-Filled Double-Skin Steel (CFDST) Wind Turbine Towers . | BUILDINGS , 2024 , 14 (8) . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
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.
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
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
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
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
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
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)
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
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)
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
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
Cite：
Copy from the list or Export to your reference management。
| 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 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Extreme winds, such as typhoons, can lead to serious vibration and damage for flexible membrane roofs. An understanding of the aeroelastic behavior experienced by membrane structures during typhoons is therefore significant to allow well designed in practice. This paper investigates the aeroelastic response of umbrella shaped membrane structures under typhoon experimentally and numerically. The flexible scaled model is tested in typhoon field simulated in wind tunnel to investigate the aeroelastic characteristics varying with wind velocities and wind directions, including displacement response, non-Gaussian characteristics, frequency, modal shape and damping ratios et al. The full coupled fluid-structure interaction numerical model proposed is benchmarked and expanded in parameter discussions. The results indicate that non-Gaussian characteristics appear significant with positive skewness in pressure region and negative skewness in suction region. The probabilistic distribution proves leptokurtic type with kurtosis beyond three. The displacement response in statistics increases almost linearly with wind velocity while the non-Gaussian characteristics remain robust. The high-order mode shapes can be excited in typhoon, and their frequencies and damping ratios vary with wind velocities. The effects of both wind velocity and membrane pretension are proved to be more remarkable than rise-span ratio. This study can address the deficiency of current studies and provisions on the dynamic response of membrane structures in typhoons.
Keyword ：
Aerodynamic characteristics Aerodynamic characteristics Flexible model Flexible model Typhoon Typhoon Umbrella membrane structure Umbrella membrane structure X -flow X -flow
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Li, Dong , Lu, Leiyu , Huang, Hongwei et al. Investigation on typhoon-induced aero-elastic response of membrane structures by wind tunnel test and numerical simulation [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 98 . |
| MLA | Li, Dong et al. "Investigation on typhoon-induced aero-elastic response of membrane structures by wind tunnel test and numerical simulation" . | JOURNAL OF BUILDING ENGINEERING 98 (2024) . |
| APA | Li, Dong , Lu, Leiyu , Huang, Hongwei , Qiu, Yi , Deng, Xiaowei , Liu, Changjiang . Investigation on typhoon-induced aero-elastic response of membrane structures by wind tunnel test and numerical simulation . | JOURNAL OF BUILDING ENGINEERING , 2024 , 98 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Export
| Results： |
Selected to |
| Format： |
