Query：
学者姓名：赖志超
Refining：
Year
Type
Indexed by
Source
Complex
Co-
Language
Clean All
Abstract ：
在结构动力冲击响应分析中,通常采用动力放大系数(DAF)简化计算结构的动力响应.但是,目前工程结构中对DAF的取值还存在争议.针对此问题,本文推导了多自由度(MDOF)体系的DAF解析表达式,分析了DAF大于2.0的前提条件;分别通过单自由度(SDOF)体系和MDOF体系算例模型验证了解析表达式的准确性,解释了MDOF体系的DAF大于2.0的原因.基于所提出的DAF解析表达式分析了张弦梁剩余结构在断索冲击作用下的DAF分布规律.分析结果表明:当某一阶模态振型的分量与静力响应值反向时,张弦梁的DAF可能会大于 2.0;即使在有阻尼情况下,张弦梁的DAF也可能会大于2.0.
Keyword ：
动力放大系数 动力放大系数 多自由度体系 多自由度体系 张弦梁 张弦梁 断索冲击 断索冲击
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 张超 , 周桢干 , 赖志超 et al. 多自由度体系的动力放大系数解析研究 [J]. | 振动工程学报 , 2025 , 38 (3) : 550-557 . |
| MLA | 张超 et al. "多自由度体系的动力放大系数解析研究" . | 振动工程学报 38 . 3 (2025) : 550-557 . |
| APA | 张超 , 周桢干 , 赖志超 , 付馨迪 , 杨晓强 . 多自由度体系的动力放大系数解析研究 . | 振动工程学报 , 2025 , 38 (3) , 550-557 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
As the novel wind turbine tower structure, the concrete-filled double-skin tubular (CFDST) wind turbine system shows an excellent mechanical performance compared with conventional steel tubes. This paper performs a comprehensive investigation to better understand structural dynamics and aeroelasticity of CFDST wind turbine system against typhoons. A series of aeroelastic wind tunnel model tests are initially conducted, featuring the tower-blade-nacelle coupled system in simulated typhoon fields. Then, a two-way coupled numerical model is developed, by applying the k-omega SST model to simulate the turbulent flows and aerodynamic loads of the CFDST wind turbine system. The effects of blade rotation, turbulence, and wind speed on the aerodynamic characteristics of the CFDST wind turbine system are discussed based numerical simulations. The results indicate that the dynamic response of the CFDST wind turbine system is dominated by the harmonic excitation from blade rotation (i.e., 1 P and 3 P), especially in the crosswind direction (i.e., 90 degrees and 270 degrees). The structural dynamic response would be significantly amplified with the increasing reduced wind speed and turbulence intensity. Consequently, the maximum mean and fluctuating wind pressure coefficients rise up to 4.23 and 3.2, respectively, at Iuu= 24 % and Ur= 10.7. Correspondingly, the RMS values of lift and drag coefficients reach maximum values of 0.38 and 1.15, respectively. This study gains insight into the aerodynamic behavior of the integrated wind turbine system with CFDST tower.
Keyword ：
Aerodynamic characteristics Aerodynamic characteristics Computational fluid dynamics (CFD) Computational fluid dynamics (CFD) Concrete-filled double-skin tubular (CFDST) Concrete-filled double-skin tubular (CFDST) Dynamic response Dynamic response Wind tunnel test Wind tunnel test
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Li, Dong , Fang, Shijing , Sun, Chuang et al. Aeroelastic wind tunnel study and numerical simulation of Concrete-Filled Double-Skin Tubular (CFDST) wind turbine system [J]. | STRUCTURES , 2025 , 74 . |
| MLA | Li, Dong et al. "Aeroelastic wind tunnel study and numerical simulation of Concrete-Filled Double-Skin Tubular (CFDST) wind turbine system" . | STRUCTURES 74 (2025) . |
| APA | Li, Dong , Fang, Shijing , Sun, Chuang , Xu, Fujie , Zhao, Jie , Lai, Zhichao . Aeroelastic wind tunnel study and numerical simulation of Concrete-Filled Double-Skin Tubular (CFDST) wind turbine system . | STRUCTURES , 2025 , 74 . |
| 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 ：
High-performance concrete-filled steel tube (CFST) members consisting of high-strength steel and ultra-high performance concrete (UHPC) are more and more widely applied in modern engineering structures. These structures/structural components may suffer from axial impact loading during its life cycle such as impact induced by the collapse of top-level floors. However, the design and evaluation methods for axial impact resistance remain unclear for these structures. This paper presented a systematic study on both the impact and post-impact resistances of high-performance CFST members subjected to axial impact. A database of CFST members subjected to axial impact was first compiled, and a finite element (FE) model was established and verified by the test results from the compiled database. The effects of key parameters on the impact resistances and residual capacity of square UHPC-filled high-strength steel tubes under axial impact were clarified. By employing 420 FE models of square CFST columns subjected to axial impact with random parameters, equations for predicting the maximum axial displacement under axial impact and axial residual bearing capacity after axial impact that are suitable for conventional and high-performance CFST columns (fy <= 960 MPa and fcu <= 200 MPa) were developed with reasonable accuracy. Finally, a maximum deformation limit was recommended for CFST components subjected to axial impact, which provides a reference for anti-impact design and evaluation for general high-performance CFST members.
Keyword ：
Axial impact resistance Axial impact resistance Concrete-filled steel tube Concrete-filled steel tube High-strength steel High-strength steel Prediction method Prediction method Residual capacity Residual capacity
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Yang, Xiaoqiang , Zhu, Liguo , Bi, Kaiming et al. Design and evaluation methods for CFST members with high-performance materials subjected to axial impact [J]. | ENGINEERING STRUCTURES , 2025 , 327 . |
| MLA | Yang, Xiaoqiang et al. "Design and evaluation methods for CFST members with high-performance materials subjected to axial impact" . | ENGINEERING STRUCTURES 327 (2025) . |
| APA | Yang, Xiaoqiang , Zhu, Liguo , Bi, Kaiming , Zhao, Hui , Zhu, Yong , Lai, Zhichao . Design and evaluation methods for CFST members with high-performance materials subjected to axial impact . | ENGINEERING STRUCTURES , 2025 , 327 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
高强方钢管超高性能混凝土构件在大跨桥梁、超高层建筑等工程中均有着广泛的应用前景.为研究高强方钢管超高性能混凝土短柱的轴压力学性能,设计制作了 16根方钢管混凝土短柱,并对其开展轴压试验,研究了混凝土抗压强度、钢管屈服强度、截面宽厚比等参数对其轴压性能的影响.通过ABAQUS有限元软件对试件进行非线性有限元分析和参数分析,以明确高强方钢管超高性能混凝土轴压短柱的受力机理.研究结果表明:高强方钢管超高性能混凝土短柱轴压性能良好;提高混凝土抗压强度可显著提升轴压承载力和刚度,且对延性影响不大;提高钢材屈服强度可提升承载力,但对轴压刚度和延性的影响较小;减小截面宽厚比可提升轴压承载力、刚度和延性,并延缓局部屈曲和剪切破坏.最后,将已有试验统计数据和所得试验结果与中国规范GB 50936-2014、欧洲规范EC4(2004)和美国规范AISC 360-22中相关公式的计算结果进行对比,发现GB 50936-2014对高强方钢管超高性能混凝土短柱轴压承载力的预测偏差较大,欧洲规范EC4(2004)的预测不够安全,且无法考虑钢管局部失稳的影响;美国规范AISC 360-22的计算结果与试验结果较为接近,且考虑了钢管局部失稳的影响.
Keyword ：
方钢管混凝土 方钢管混凝土 桥梁工程 桥梁工程 超高性能混凝土 超高性能混凝土 轴压试验 轴压试验
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 赖志超 , 董翠芬 , 林玉煌 et al. 高强方钢管超高性能混凝土短柱轴压性能研究 [J]. | 中国公路学报 , 2025 , 38 (3) : 343-353 . |
| MLA | 赖志超 et al. "高强方钢管超高性能混凝土短柱轴压性能研究" . | 中国公路学报 38 . 3 (2025) : 343-353 . |
| APA | 赖志超 , 董翠芬 , 林玉煌 , 王莹 , 陈宝春 , 李文勃 . 高强方钢管超高性能混凝土短柱轴压性能研究 . | 中国公路学报 , 2025 , 38 (3) , 343-353 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
This study investigates the cyclic behavior of high-strength square concrete-filled steel tube (HS-SCFST) beamcolumns through experimental testing of 9 specimens and complementary finite element analysis. The specimens were subjected to constant axial load and cyclic flexural loading, with test parameters including axial compression ratio, steel yield stress, concrete compressive strength, and width-to-thickness ratio. The finite element models were benchmarked for parametric studies. The results showed the axial compression ratio influenced ultimate strength and envelope curve shape, while increased steel/concrete strength improved strength and energy dissipation capacity. However, higher slenderness and width-to-thickness ratios decreased strength, ductility, and stiffness notably. Evaluation of building codes GB50936, EC4, AISC360-16, and AIJ showed EC4 was most reasonable, GB50936 most conservative as it neglects stress distribution between steel and concrete, and AISC 360-16 conservative as it excludes concrete contribution. The study indicates existing code provisions need improvement for calculating HS-SCFST member strength. Additionally, a simplified calculation model was proposed to determine envelope curves for HS-SCFST beam-columns based on the experimental and FE results. In summary, the study provided data on HS-SCFST cyclic behavior and code evaluations, proposing enhancements for design.
Keyword ：
Beam-columns Beam-columns Concrete-filled steel tube (CFST) Concrete-filled steel tube (CFST) Cyclic behavior Cyclic behavior Experimental tests Experimental tests Finite element analysis Finite element analysis High-strength materials High-strength materials
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Lai, Zhichao , Han, Wenbing , Wang, Ying et al. Cyclic behavior of high-strength square concrete filled steel tube (HS-SCFST) beam-columns [J]. | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2025 , 227 . |
| MLA | Lai, Zhichao et al. "Cyclic behavior of high-strength square concrete filled steel tube (HS-SCFST) beam-columns" . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 227 (2025) . |
| APA | Lai, Zhichao , Han, Wenbing , Wang, Ying , Lin, Xueying , Yang, Yuxing , Zeng, Xiaoyong . Cyclic behavior of high-strength square concrete filled steel tube (HS-SCFST) beam-columns . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2025 , 227 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
This paper investigates the axial compressive behavior of concrete-filled steel tube (CFT) columns with embedded FRP tubes by the following three steps: (i) compiling a comprehensive experimental database consisting of 47 tests, (ii) conducting 294 parametric analyses using benchmarked FE models to investigate the effect of relative strength factor on the strength enhancement ratio, and (iii) evaluating current design equations using the results from the database and FE parametric analyses. The insufficiencies of current equations were identified, leading to the development of a new unified design equation. This proposed design equation explicitly accounts for the strength enhancement achieved by embedding FRP tubes into CFT columns, providing improved accuracy in estimating the axial compressive strength of SCFC columns over a wider range of material strength and geometric parameters (e.g., yield strength of steel and compressive strength of concrete up to 960 MPa and 100 MPa, respectively).
Keyword ：
Columns Columns Concrete-filled steel tube (CFT) Concrete-filled steel tube (CFT) Fiber reinforced polymer (FRP) Fiber reinforced polymer (FRP) Finite element analysis Finite element analysis Unified design equation Unified design equation
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Yan, Jie , Lai, Zhichao , Jiang, Longfeng et al. Unified design equation of square concrete-filled steel tube columns with embedded circular FRP tubes [J]. | STRUCTURES , 2025 , 71 . |
| MLA | Yan, Jie et al. "Unified design equation of square concrete-filled steel tube columns with embedded circular FRP tubes" . | STRUCTURES 71 (2025) . |
| APA | Yan, Jie , Lai, Zhichao , Jiang, Longfeng , Zhu, Xianhao . Unified design equation of square concrete-filled steel tube columns with embedded circular FRP tubes . | STRUCTURES , 2025 , 71 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
The purpose of this study was to systematically evaluate the performance advantages of the Long Short-Term Memory (LSTM) in predicting the axial compressive capacity of short rectangular concrete-filled steel tube (RCFST) columns and to assess its effectiveness in interpreting structural mechanical responses. For the purpose of emphasizing the availability of the LSTM model, a controlled experimental design was implemented: first, the Back Propagation Neural Network (BPNN) was established as a benchmark model, and subsequently, the prediction results of both models were compared with theoretical calculations derived from existing formulas across multiple indexes. Through a quantitative analysis of experimental data from the literature, this research conducted a sensitivity analysis of key parameters in the prediction model (such as cross -sectional area of steel and yield stress of steel), comparing and evaluating the influence of each parameter on bearing capacity. The results indicate that, compared to the BPNN model, the LSTM model offers significant advantages, demonstrating higher accuracy and reduced discretization. More importantly, the weight distribution characteristics of the LSTM model align more closely with the structural mechanical mechanisms, providing a valuable reference for predicting the mechanical properties of structures.
Keyword ：
Back Propagation Neural Network Back Propagation Neural Network Long Short-Term Memory Long Short-Term Memory RCFST columns RCFST columns Sensitivity analysis Sensitivity analysis The axial compressive strength The axial compressive strength
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Lai, Zhichao , Zhang, Shiji , Lu, Deren et al. Evaluating neural network models for load-bearing capacity of RCFST columns [J]. | STRUCTURES , 2025 , 76 . |
| MLA | Lai, Zhichao et al. "Evaluating neural network models for load-bearing capacity of RCFST columns" . | STRUCTURES 76 (2025) . |
| APA | Lai, Zhichao , Zhang, Shiji , Lu, Deren , Zhang, Chao , Chen, Zhidong . Evaluating neural network models for load-bearing capacity of RCFST columns . | STRUCTURES , 2025 , 76 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
With larger rotors and taller towers developed to capture more wind energy, the wind turbine structures are becoming more flexible with aspect ratio increasing. However, there remains a strong gap of dynamic analysis of fully coupled high-aspect-ratio wind turbine tower system. This study employed the IEA 15 WM wind turbine as a reference prototype, and designed a scaled model based on the geometric, kinematic, and dynamic similarity principles. Then, the systematic investigations of dynamic behavior of coupled wind turbine tower system were performed tested combined wind tunnel tests with computational fluid dynamics (CFD) modelling. The dynamic behavior was analyzed in terms of acceleration and displacement responses, motion trajectories, and dynamic characteristics in both crosswind and downwind directions. In CFD modelling, the aerodynamic characteristics were revealed in terms of the average pressure coefficient, fluctuating pressure coefficient, and lift and drag forces. Parameter discussions were performed including the blade rotation, turbulence intensity and wind speed. The results indicate that turbine vibrations are highly sensitive to variations in wind speed and turbulence. As wind speed and turbulence increase, the range of vibration data expands, with peak responses amplified by 249.70 % and 59.63 %, respectively, and lift forces increasing by over 40 %. Furthermore, blade rotation increases the average pressure coefficient by up to 42.09 %. Compared to the previous studies of low-aspect-ratio wind turbine tower case, high-aspect-ratio wind turbine tower exhibit significantly more intense vibrations in the same operating cases, with an increase in the root mean square (RMS) of acceleration up to 52.50 %. Additionally, the slender tower structures are more susceptible to higher-order frequency excitations induced by fluid solid interactions during operation.
Keyword ：
Aerodynamic behavior Aerodynamic behavior Computational fluid dynamics (CFD) Computational fluid dynamics (CFD) High aspect ratio High aspect ratio 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 , Lv, Zhihao et al. Dynamic response analysis of wind turbine tower with high aspect ratio: Wind tunnel tests and CFD simulation [J]. | THIN-WALLED STRUCTURES , 2025 , 211 . |
| MLA | Li, Dong et al. "Dynamic response analysis of wind turbine tower with high aspect ratio: Wind tunnel tests and CFD simulation" . | THIN-WALLED STRUCTURES 211 (2025) . |
| APA | Li, Dong , Sang, Yuan , Lv, Zhihao , Wu, Keda , Lai, Zhichao . Dynamic response analysis of wind turbine tower with high aspect ratio: Wind tunnel tests and CFD simulation . | THIN-WALLED STRUCTURES , 2025 , 211 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Shock waves inflict catastrophic impacts and severe damage on ships. To investigate the following bubble dynamics near damaged ship structures subjected to shock waves, underwater explosion experiments were conducted using 2.5 g TNT detonated beneath clamped elastoplastic plates with varying hole dimensions and shapes. The experimental results indicated that the dimension and shape of these holes significantly influence the morphology of resulting water jets. A finite element model was developed and validated, followed by a series of numerical simulations to systematically investigate the evolution of water jets and the dynamic response of clamped elastoplastic plates across varying stand-off distances, hole dimensions, and explosive equivalents. The findings reveal that the interaction of various loads and boundary conditions lead to distinct water jets: upward, counter, and downtown water jets. Based on these findings, a criterion was proposed to classify jet morphologies beneath clamped elastoplastic plates. Finally, full-scale ship numerical simulations were performed at varying distances to assess the damage modes associated with various jet types. This investigation offers certain guidance for the blast-resistance ship design.
Keyword ：
Clamped elastoplastic plate Clamped elastoplastic plate Full-size ships Full-size ships Hole Hole Underwater explosion Underwater explosion Water jet Water jet
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Jiang, Yipeng , Qin, Jian , Lai, Zhichao et al. Experimental and numerical investigation on bubble dynamics near plates with a hole under near-field underwater explosion [J]. | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2025 , 200 . |
| MLA | Jiang, Yipeng et al. "Experimental and numerical investigation on bubble dynamics near plates with a hole under near-field underwater explosion" . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 200 (2025) . |
| APA | Jiang, Yipeng , Qin, Jian , Lai, Zhichao , Meng, Xiangyao , Wen, Yanbo , Huang, Ruiyuan . Experimental and numerical investigation on bubble dynamics near plates with a hole under near-field underwater explosion . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2025 , 200 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Export
| Results： |
Selected to |
| Format： |
