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学者姓名：杨晓强
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Abstract ：
Concrete filled steel tube (CFST) column is widely applied in shear frame structure in seismic-prone area owing to its superior earthquake resistant performance. However, CFST column might still suffer damage under a severe earthquake. This paper proposes a novel tuned-mass type column-in-column (CIC) system to improve the seismic behavior of the CFST column and hence protect the structure. The CIC system is formed by splitting the CFST column into a primary column and a secondary column, while the overall cross section area and hence the load- bearing capacity is not changed. By optimally selecting the springs and dashpots to interconnect the two columns, the CIC can act as a non-conventional tuned mass damper (TMD) to reduce seismic vibrations of structures. To demonstrate the proposed CIC concept, a single-story and a five-story frame structure with and without control are designed. Nonlinear time history analyses are performed to study the seismic responses of these structures considering different seismic design levels, earthquake ground motions and CIC control schemes. Numerical results show that the CIC system can effectively reduce the seismic induced story acceleration, displacement and drift ratio of frame structures with the reduction ratios approximately between 21 % and 30 %, and the ratios on reducing the base shear force and bending moment are between 27 % and 31 %, and between 34 % and 49 %, respectively. The proposed CIC control concept is a new solution for mitigations of seismic responses of CFST frame structures.
Keyword ：
CFST frame structure CFST frame structure Column-in-column Column-in-column FE modelling FE modelling Seismic response analysis Seismic response analysis Vibration control Vibration control
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| GB/T 7714 | Fang, Xiaojun , Hao, Hong , Bi, Kaiming et al. Seismic response control of shear frame structure using a novel tuned-mass type composite column [J]. | ENGINEERING STRUCTURES , 2025 , 322 . |
| MLA | Fang, Xiaojun et al. "Seismic response control of shear frame structure using a novel tuned-mass type composite column" . | ENGINEERING STRUCTURES 322 (2025) . |
| APA | Fang, Xiaojun , Hao, Hong , Bi, Kaiming , Ding, Hao , Yang, Xiaoqiang , Song, Jian et al. Seismic response control of shear frame structure using a novel tuned-mass type composite column . | ENGINEERING STRUCTURES , 2025 , 322 . |
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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
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| 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 . |
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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
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| 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 . |
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Near-field underwater explosions generate complex load forms and cause destructive strikes on ships. To investigate the damage characteristics of ships under the combined effect of multiple loads, local and overall damage modes were first investigated through the combination of experimental tests and numerical simulation. Then a series of numerical simulations of full-scale ships subjected to near-field underwater explosions with different stand-off distances, equivalents, and detonation positions were carried out. The damage effects of shock wave, bubble pulsation, after flow, and water jet loads on ships were analyzed. The results show that the combined effects of different loads lead to different damage modes. Shock waves and after flow loads are the main cause of local damage and hogging damage, while pressure difference and bubble adsorption are the main reasons for the hogging damage. Finally, a criterion was proposed to determine the damage modes of ships under near-field underwater explosions.
Keyword ：
CEL method CEL method Full-size ships Full-size ships Near-field underwater explosion Near-field underwater explosion Numerical simulation Numerical simulation Ship damage modes Ship damage modes
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| GB/T 7714 | Huang, Ruiyuan , Jiang, Yipeng , Qin, Jian et al. Investigation on the coupling damage effects of ships subjected to near-field underwater explosion loads [J]. | MARINE STRUCTURES , 2024 , 98 . |
| MLA | Huang, Ruiyuan et al. "Investigation on the coupling damage effects of ships subjected to near-field underwater explosion loads" . | MARINE STRUCTURES 98 (2024) . |
| APA | Huang, Ruiyuan , Jiang, Yipeng , Qin, Jian , Meng, Xiangyao , Chi, Hui , Yang, Xiaoqiang et al. Investigation on the coupling damage effects of ships subjected to near-field underwater explosion loads . | MARINE STRUCTURES , 2024 , 98 . |
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The current research on the cavitation phenomenon in the underwater explosion process is focused on the shock wave phase. In this study, it was found that there was also significant cavitation during bubble pulsation. Underwater explosion experiments were carried out at the bottom of a sheet using 2.5 g of TNT, which also showed that: (a) Cavitation lasts for the same duration as the bubble contraction time, (b) A cavitation closure pressure, the peak of which is greater than the bubble pulsation pressure, is produced by the closing of the cavitation zone. A tensile cut-off model was introduced to simulate the cavitation phenomenon during bubble pulsation, and the formation mechanism was investigated. The numerical simulation results show that: (a) The cavitation phenomenon is visible when the sheet above the explosive and the explosion distance are between 0.93 and 1.17 times the radius of the largest bubble, or between 0.69 and 1.85 times the maximum radius of the bubble when the sheet below the explosive, (b) The cavitation region and cavitation closure pressure increase and decrease with increasing explosion distance, peaking at a value close to one times the theoretical maximum bubble radius, and (c) The cavitation zone shrinks and the cavitation closing pressure drops as sheet thickness increases.
Keyword ：
Bubble pulsation Bubble pulsation Cavitation Cavitation Near-field Near-field Underwater explosion Underwater explosion
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| GB/T 7714 | Wen, Yanbo , Qin, Jian , Lai, Zhichao et al. Experimental and numerical simulation investigation of cavitation phenomenon during bubble pulsation process [J]. | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2024 , 186 . |
| MLA | Wen, Yanbo et al. "Experimental and numerical simulation investigation of cavitation phenomenon during bubble pulsation process" . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 186 (2024) . |
| APA | Wen, Yanbo , Qin, Jian , Lai, Zhichao , Meng, Xiangyao , Yang, Xiaoqiang , Chi, Hui et al. Experimental and numerical simulation investigation of cavitation phenomenon during bubble pulsation process . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2024 , 186 . |
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The cavitation phenomenon caused by near-field underwater explosion imposes a secondary loading on ship structures. Studying the cavitation effects of plates during underwater explosions has implications for ship protection since plate is a typical structure of ships. This paper experimentally investigated the behavior of fixed square plates subjected to near-field underwater explosions. Experimental results indicated that cavitation existed in both shockwave and bubble pulsation stages; and the cavitation closure load at bubble pulsation stage was measured. To further investigate the cavitation phenomenon and the load characteristics at the bubble pulsation stage, finite element models were developed. The numerical results show that cavitation will increase the bubble load impulse by 47 % under specific conditions. These models were then used to investigate the influence of the stand-off distance and charge weight on cavitation area and load characteristics. An empirical formula was finally proposed to predict the coupled impulse of cavitation closure, bubble pulsation and water jet. This research has practical guidelines for the protection design of ship structures.
Keyword ：
Bubble pulsation Bubble pulsation Cavitation Cavitation Impulse Impulse Load Load Underwater explosion Underwater explosion
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| GB/T 7714 | Huang, Ruiyuan , Chen, Yufan , Qin, Jian et al. Investigation on cavitation phenomena and load characteristics of fixed square plates subjected to near-field underwater explosion [J]. | OCEAN ENGINEERING , 2024 , 295 . |
| MLA | Huang, Ruiyuan et al. "Investigation on cavitation phenomena and load characteristics of fixed square plates subjected to near-field underwater explosion" . | OCEAN ENGINEERING 295 (2024) . |
| APA | Huang, Ruiyuan , Chen, Yufan , Qin, Jian , Meng, Xiangyao , Wen, Yanbo , Yang, Xiaoqiang et al. Investigation on cavitation phenomena and load characteristics of fixed square plates subjected to near-field underwater explosion . | OCEAN ENGINEERING , 2024 , 295 . |
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The torsional effect of prestressed corrugated steel-concrete composite girders (PCSCCG) is more prominent due to its low torsional stiffness, which is therefore crucial to be clarified for safe design. This paper proposed a theoretical model based on the combined actions softened-membrane model (CA-SMM) to predict the torsional response of PCSCCG. The equilibrium, compatibility and constitutive equations were established to consider the characteristics of corrugated steel webs (CSW) and prestressing effect, where a reasonable shear strain assumption was presented to determine the force behavior of concrete slabs and CSW, and the thickness of shear flow in concrete slabs was corrected. An optimized algorithm using the gradient descent method was established to improve the insufficiency and stability. Based on this, a simplified design method was proposed to rapidly evaluate the torque and twist of PCSCCG. Finally, the feasibility of the proposed model and simplified design method was verified by available tests. The superiority of the analytical model in predicting the full torsional performance of PCSCCG was proved, and the reasonability and simplicity of the simplified method in capturing the cracking, yield, and ultimate torques and twists were observed.
Keyword ：
Combined actions softened-membrane model Combined actions softened-membrane model Composite girder Composite girder Corrugated steel webs Corrugated steel webs Optimized algorithm Optimized algorithm Simplified design method Simplified design method
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| GB/T 7714 | Zhang, Hao , Zhao, Qiu , Chen, Yiyan et al. Analytical model and design method of corrugated steel-concrete composite girders under torsion [J]. | STRUCTURES , 2024 , 70 . |
| MLA | Zhang, Hao et al. "Analytical model and design method of corrugated steel-concrete composite girders under torsion" . | STRUCTURES 70 (2024) . |
| APA | Zhang, Hao , Zhao, Qiu , Chen, Yiyan , Fang, Xiaojun , Yang, Zhaohui , Yang, Xiaoqiang . Analytical model and design method of corrugated steel-concrete composite girders under torsion . | STRUCTURES , 2024 , 70 . |
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为了研究高强双钢板-UHPC组合剪力墙的轴压性能，进行了8片组合剪力墙的轴向受压试验，试验参数包括截面稳定系数、钢板厚度、钢板屈服强度和混凝土类型。试验结果表明：钢板的破坏形态受截面稳定系数的影响可分为弹性屈曲破坏和塑性屈曲破坏两种类型；截面稳定系数从0.6增加到1.2时，组合剪力墙的承载力下降了33.6%;钢板厚度从3 mm增加到5 mm时，组合剪力墙的承载力增加了16.7%;屈曲参数k取0.8时，采用欧拉公式可以很好地预测钢板的临界屈曲应变。最后，对比了中国GB/T 51340—2018《核电站钢板混凝土结构技术标准》和美国AISC 360-22对组合剪力墙承载力的计算结果，发现美国AISC 360-22可以较好地估算高强双钢板-UHPC组合剪力墙的轴压承载力。
Keyword ：
组合剪力墙 组合剪力墙 超高性能混凝土 超高性能混凝土 轴压承载力 轴压承载力 静力试验 静力试验 高强钢 高强钢
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| GB/T 7714 | 姚鹏宇 , 赖志超 , 杨晓强 . 高强双钢板-UHPC组合剪力墙轴压性能试验研究 [J]. | 建筑结构学报 , 2024 , 45 (S1) : 228-235 . |
| MLA | 姚鹏宇 et al. "高强双钢板-UHPC组合剪力墙轴压性能试验研究" . | 建筑结构学报 45 . S1 (2024) : 228-235 . |
| APA | 姚鹏宇 , 赖志超 , 杨晓强 . 高强双钢板-UHPC组合剪力墙轴压性能试验研究 . | 建筑结构学报 , 2024 , 45 (S1) , 228-235 . |
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Impacts have the distinctive characteristics of diverse conditions, low frequency, repeated occurrence, and high hazard; as such, they have emerged as a leading factor in bridge collapses. Ultra-high-performance concrete (UHPC)-filled high-strength steel tubular members are the preferred choice for large-span and high-pier bridges whose vulnerability to impacts cannot be ignored. Nine UHPC-filled high-strength square steel tubular specimens were designed in this study to explore their axial impact resistances and residual bearing capacities using a drop hammer and a hydraulic testing machine, respectively. The influence of impact energy and UHPC steel fiber content on key performance indicators including impact force, deformation, energy absorption, residual capacity, and residual rate were subsequently evaluated. The results show that the impact resistance and residual capacity of a UHPC-filled high-strength steel tubular member are significantly higher than those of a high-strength concrete-filled high-strength steel tubular member and that UHPC members can withstand greater levels of axial impact energy. Furthermore, the strong bonding behavior between the steel fibers and concrete matrix, as well as the resulting fiber network skeleton, can effectively improve the strength, crack resistance, ductility, and energy dissipation capacity of UHPC. Indeed, the incorporation of steel fibers significantly reduces the peak displacement and residual deformation of components subjected to axial impact by up to 14. 3% and 31. 4%, respectively, and an increase in steel fiber volume content from 0% to 2% increases the energy absorption per unit deformation by 38. 4%. In addition, when a specimen does not suffer severe damage from the axial impact, its residual bearing capacity and residual rate increase significantly by up to 28. 3 % and 12. 4 %, respectively. Therefore, an appropriate increase in fiber content (up to 2 %) can improve the axial impact resistance and residual bearing capacity of a UHPC-filled high-strength square steel tubular member. However, the steel fiber contents considered in this study align with conventional engineering practice, and a more comprehensive assessment and analysis should be conducted for scenarios beyond this scope. © 2024 Chang'an University. All rights reserved.
Keyword ：
Bearing capacity Bearing capacity Benchmarking Benchmarking Energy absorption Energy absorption Energy dissipation Energy dissipation High performance concrete High performance concrete High strength steel High strength steel Steel fibers Steel fibers Steel testing Steel testing Tubular steel structures Tubular steel structures
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| GB/T 7714 | Yang, Xiao-Qiang , Zhang, Qiang , Lai, Zhi-Chao et al. Axial Impact and Residual Behavior of UHPC-filled High-strength Square Steel Tubular Members [J]. | China Journal of Highway and Transport , 2024 , 37 (5) : 234-245 . |
| MLA | Yang, Xiao-Qiang et al. "Axial Impact and Residual Behavior of UHPC-filled High-strength Square Steel Tubular Members" . | China Journal of Highway and Transport 37 . 5 (2024) : 234-245 . |
| APA | Yang, Xiao-Qiang , Zhang, Qiang , Lai, Zhi-Chao , Chen, Jian-Qing , Ma, Wen-Shuo . Axial Impact and Residual Behavior of UHPC-filled High-strength Square Steel Tubular Members . | China Journal of Highway and Transport , 2024 , 37 (5) , 234-245 . |
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冲击具有作用源多样、低频多发、危害性大等鲜明特征,已成为桥梁垮塌的主要原因之一.高强钢管超高性能混凝土(UHPC)作为大跨高墩桥梁的优选构件之一,其受冲击作用的风险不可忽视.设计制作了9根高强方钢管UHPC短柱,以期研究其轴向冲击性能及冲击后剩余性能.采用落锤试验机和液压试验机分别开展轴向冲击试验及冲击后剩余承载力试验,主要考虑冲击能量和钢纤维掺量2种参数,探究冲击力、变形、能量吸收、剩余承载力和剩余率等关键性能指标的变化规律.结果表明:高强钢管UHPC构件的抗冲击性能和剩余性能明显优于高强钢管高强混凝土构件,能够应对更大能量的轴向冲击作用;钢纤维与混凝土基体之间的黏结锚固作用及其形成的纤维网骨架能有效提高UHPC的强度、抗裂性、延性与耗能能力,这一特性使得构件在冲击作用下的峰值位移和残余变形随着钢纤维掺量的增加而显著降低;2％钢纤维掺量时,峰值位移与残余变形的降低幅度分别可达14.3％和31.4％,单位变形耗能最大提升了38.4％;在未发生严重损伤的情况下,构件的剩余承载力和剩余率随着钢纤维掺量的增加显著提高,分别可达28.3％和12.4％;在0～2％范围内,钢纤维体积掺量的增加可显著提高钢管混凝土构件的抗轴向冲击性能与冲击后剩余力学性能.需要指出,考虑的钢纤维掺量仅针对工程设计中常用范围,超出研究范围时需进一步论证分析.
Keyword ：
UHPC UHPC 剩余承载力 剩余承载力 桥梁工程 桥梁工程 试验研究 试验研究 轴向冲击 轴向冲击 钢纤维体积掺量 钢纤维体积掺量 高强钢管 高强钢管
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| GB/T 7714 | 杨晓强 , 张强 , 赖志超 et al. 高强方钢管UHPC构件轴向冲击与冲击后剩余性能 [J]. | 中国公路学报 , 2024 , 37 (5) : 234-245 . |
| MLA | 杨晓强 et al. "高强方钢管UHPC构件轴向冲击与冲击后剩余性能" . | 中国公路学报 37 . 5 (2024) : 234-245 . |
| APA | 杨晓强 , 张强 , 赖志超 , 陈剑清 , 马文硕 . 高强方钢管UHPC构件轴向冲击与冲击后剩余性能 . | 中国公路学报 , 2024 , 37 (5) , 234-245 . |
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