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学者姓名：赖志超
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Abstract ：
The current AISC specification (AISC 360-22) does not permit using high-strength materials in steel plate-concrete composite (SC) walls due to limited research. This paper uses three steps to address this. In the first step, experimental tests on 13 high-strength SC walls are conducted. The test parameters are stud spacing, thickness of steel plate, yield stress of steel, and compressive strength of concrete. Results from the tests indicate that the axial compressive strength of SC walls increases when the material strength increases or when the slenderness ratio (i.e., ratio of the stud spacing to the thickness of steel faceplate) decreases. In the second step, finite element (FE) models are developed and benchmarked. Parametric studies are then conducted to further validate the findings from the tests and to develop effective stress-strain relationships for the steel faceplate. The resulting effective stress-strain relationship can be used in fiber-based analysis programs for better accuracy, since it implicitly accounts for the influence of local buckling and yielding. Finally, the effective stress-strain relationship is used to revise the equation in AISC 360-22. The accuracy of the revised equation is verified using results from both the experimental tests and FE parametric studies.
Keyword ：
Composite wall Composite wall Design Design High-strength steel High-strength steel Steel plate-concrete composite (SC) Steel plate-concrete composite (SC) Strength Strength Ultra-high-performance concrete (UHPC) Ultra-high-performance concrete (UHPC)
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| GB/T 7714 | Yao, Pengyu , Shi, Yuzhi , Lai, Zhichao et al. Experimental Test, Analysis, and Design of High-Strength SC Walls Subjected to Axial Compression [J]. | JOURNAL OF STRUCTURAL ENGINEERING , 2025 , 151 (4) . |
| MLA | Yao, Pengyu et al. "Experimental Test, Analysis, and Design of High-Strength SC Walls Subjected to Axial Compression" . | JOURNAL OF STRUCTURAL ENGINEERING 151 . 4 (2025) . |
| APA | Yao, Pengyu , Shi, Yuzhi , Lai, Zhichao , Guo, Juntao . Experimental Test, Analysis, and Design of High-Strength SC Walls Subjected to Axial Compression . | JOURNAL OF STRUCTURAL ENGINEERING , 2025 , 151 (4) . |
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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). © 2024 Institution of Structural Engineers
Keyword ：
Columns (structural) Columns (structural) Compressive strength Compressive strength Fiber reinforced concrete Fiber reinforced concrete Fiber reinforced plastics Fiber reinforced plastics Pressure vessels Pressure vessels Steel fibers Steel fibers Structural design Structural design Tubular steel structures Tubular steel structures
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| 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 . |
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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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This paper proposed a novel high-strength steel-UHPC-clad steel composite wall (HS-UHPC-CS composite wall) and investigated its axial compressive behavior through experimental and numerical methods. A total of 18 axial compressive tests and finite element (FE) analyses, including parametric studies of 120 cases, were conducted. It was shown that the stud spacing-to-plate thickness ratio and the normalized slenderness ratio notably affected the strength and local buckling, while their influence on the initial stiffness was minor. The strength and initial stiffness were improved, while the ductility was compromised by the presence of ultra-high-performance concrete (UHPC). Steel fiber was critical to the HS-UHPC-CS composite wall, while the lack of steel fiber could trigger premature brittle failure. The influence of the strength of concrete was higher compared to steel plate. The critical buckling stress of the steel plate was calculated using Euler's buckling formula for the clad steel plate of the HS-UHPC-CS composite wall. The results were compared with the ordinary composite wall database. In addition, strength from test results, FE results, and the database were compared were compared with strength calculated by design provisions. It was found that the calculated strength was close but not safe. It was recommended that different concrete contribution coefficients should be applied for HS-UHPC-CS composite walls with different normalized slenderness ratios.
Keyword ：
Clad steel Clad steel Composite wall Composite wall Finite element Finite element High -strength steel High -strength steel UHPC UHPC
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| GB/T 7714 | Wang, Ying , Li, Xiang , Liao, Tianyu et al. Axial compressive behavior of high-strength steel-UHPC-clad steel composite walls [J]. | THIN-WALLED STRUCTURES , 2024 , 197 . |
| MLA | Wang, Ying et al. "Axial compressive behavior of high-strength steel-UHPC-clad steel composite walls" . | THIN-WALLED STRUCTURES 197 (2024) . |
| APA | Wang, Ying , Li, Xiang , Liao, Tianyu , Lai, Zhichao , Fang, Chenxi , Zuo, Junbo . Axial compressive behavior of high-strength steel-UHPC-clad steel composite walls . | THIN-WALLED STRUCTURES , 2024 , 197 . |
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The spatial variability of soil properties is pervasive, and can affect the propagation of seismic waves and the dynamic responses of soil-structure interaction (SSI) systems. This uncertainty is likely to increase the damage state of a structure and its risk of collapse. Additionally, conducting multiscale simulations efficiently in the presence of uncertainties is a pressing concern that must be addressed. In this work, a 3D probabilistic analysis framework for an SSI system considering site effects and spatial variability of soil property (i.e., elastic modulus, E) has been proposed. This framework is based on the random finite element method (RFEM) and domain reduction method (DRM). A multiscale model of a five-story reinforced concrete (RC) frame structure was developed on an ideal 3D slope to verify the effectiveness of the proposed framework. The dynamic responses of the structure were analyzed, and the peak floor acceleration (PFA) and peak interstory drift ratio (PSDR) were selected to estimate the damage state of structures. It was found that the proposed method significantly improves computational efficiency approximately 20 times compared with the direct method. In the regional models, with the increase of the coefficient of variation (COV) of E, the energy of seismic waves becomes more concentrated at the crest and the response spectrum value of medium and long periods increases. In the local SSI model, the soil variability increases the mean value of PSDR, resulting in a more severe damage state compared to the results from the deterministic analysis. Consequently, this study provides some suggestions for engineering practice, and the importance of probabilistic analysis considering spatially variable soils in the SSI problem is highlighted.
Keyword ：
Domain reduction method-random finite element method (DRM-RFEM) Domain reduction method-random finite element method (DRM-RFEM) Random field Random field Seismic amplification effect Seismic amplification effect Soil-structure interaction Soil-structure interaction Spatial variability Spatial variability
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| GB/T 7714 | Fang, Hongjie , Lai, Zhichao , Qu, Chuanxiang . Investigation of Seismic Amplification on Soil-Structure Interaction Problems Based on a 3D DRM-RFEM Framework [J]. | ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART A-CIVIL ENGINEERING , 2024 , 10 (1) . |
| MLA | Fang, Hongjie et al. "Investigation of Seismic Amplification on Soil-Structure Interaction Problems Based on a 3D DRM-RFEM Framework" . | ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART A-CIVIL ENGINEERING 10 . 1 (2024) . |
| APA | Fang, Hongjie , Lai, Zhichao , Qu, Chuanxiang . Investigation of Seismic Amplification on Soil-Structure Interaction Problems Based on a 3D DRM-RFEM Framework . | ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART A-CIVIL ENGINEERING , 2024 , 10 (1) . |
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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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在高压作用下,一些具有无定型相的水泥基粉末材料会发生接触硬化现象,粉末颗粒在压力作用下发生缩聚运动,并在粉末颗粒间形成结构键,进而快速形成具有一定强度及耐水性的人造石材.本文综述了压力作用下水泥基粉末材料接触硬化的成键机理以及粉末水分含量、干燥条件、钙硅比、压制过程对其接触硬化性能影响的研究进展.相关研究结果表明,压力作用下粉末颗粒间会形成氢键、范德华力、固体桥键等结构键;粉末水分含量是影响接触硬化性能的重要因素,在压力作用下,水分可以改变粉末颗粒的表面性质并影响颗粒之间的结合,进而改变压制成品的力学性能;钙硅比对接触硬化性能的影响显著,不同粉末材料在压制时的最佳钙硅比亦是不同;摩擦力的存在降低了压制效率,造成压制成品密度、强度分布不均匀,润滑剂的加入可以有效降低摩擦力的影响;此外,降低压制模具高径比并使用双面压制可有效提升压制成品的质量.
Keyword ：
压制工艺 压制工艺 接触硬化 接触硬化 无定型相 无定型相 水分含量 水分含量 水泥基粉末材料 水泥基粉末材料 结构键 结构键 钙硅比 钙硅比
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| GB/T 7714 | 张超 , 张子龙 , 黄伟 et al. 高压作用下水泥基粉末材料的接触硬化研究综述 [J]. | 材料导报 , 2024 , 38 (16) : 117-125 . |
| MLA | 张超 et al. "高压作用下水泥基粉末材料的接触硬化研究综述" . | 材料导报 38 . 16 (2024) : 117-125 . |
| APA | 张超 , 张子龙 , 黄伟 , 潘阿馨 , 赖志超 , 吴天赐 et al. 高压作用下水泥基粉末材料的接触硬化研究综述 . | 材料导报 , 2024 , 38 (16) , 117-125 . |
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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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人工模拟地震动是目前开展海洋工程结构抗震分析的主要地震输入分析。强度包络函数是人工模拟地震动的重要参数，决定了地震动的强度非平稳性特性，并对地震动持时起控制作用。目前的地震动强度包络模型均是基于陆域地震动记录统计分析得出，无法准确反应海域地震动的强度特性。因此，基于日本K-Net强震动观测台网的实测地震数据库，分析海域地震动在时域中强度分布特性；提出适用于海域地震动的三段式强度包络模型，回归得到震级M、震中距R及关键参数上升段t_1、强震平稳段t_s、下降段衰减率c（无量纲）的计算表达式；研究震级、震中距对海域地震动强度包络模型的影响规律，并探讨海域地震动与陆域地震动强度包络模型的异同。研究结果表明：海域地震动强度包络模型中关键参数上升段t_1、强震平稳段t_s、下降段衰减率c的取值范围分别为[13～52 s],[12～79 s],[0.037～0.173]；震级对关键参数（t_1、ts、c）的影响要大于震中距；与陆域地震动相比，海域地震动的强度包络模型的下降段衰减率c相差显著，且各关键参数的分布范围更大。
Keyword ：
三段式模型 三段式模型 强度包络模型 强度包络模型 海域地震动 海域地震动 相模湾地区 相模湾地区 衰减关系 衰减关系
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| GB/T 7714 | 张超 , 陈昽 , 武程 et al. 海域地震动强度包络模型研究 [J]. | 防灾减灾工程学报 , 2024 , 44 (03) : 506-517 . |
| MLA | 张超 et al. "海域地震动强度包络模型研究" . | 防灾减灾工程学报 44 . 03 (2024) : 506-517 . |
| APA | 张超 , 陈昽 , 武程 , 杜修力 , 赖志超 , 王丕光 . 海域地震动强度包络模型研究 . | 防灾减灾工程学报 , 2024 , 44 (03) , 506-517 . |
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In this study, underwater explosion tests with 2.5 g trinitrotoluene explosive under different fixed plates with prefabricated holes were conducted. The experimental results showed that the air inflow from the prefabricated hole caused the bubble to collapse earlier with an increase in the hole diameter. In addition, the deformation mode of the thin plate transitioned from "convex" to "concave" (up to down). Next, the coupled Eulerian-Lagrangian method was used to perform the corresponding numerical simulation. The accuracy of the numerical simulation method was verified through a comparison with the experimental data. In addition, a series of numerical simulations were conducted with different prefabricated-hole diameters, blast distances, and prefabricated-hole shapes. The results showed that the bubble-pulsating water jet substantially influenced the deformation of the thin plate when the diameter of the prefabricated hole was within the theoretical maximum bubble radius. When the blast distance was within the theoretical maximum bubble radius, the thin plate was subjected to only a single bubble pulsation owing to the air inflow from the prefabricated hole.
Keyword ：
Bubble pulsation Bubble pulsation Fixed plate Fixed plate High-speed camera High-speed camera Hole Hole Underwater explosion Underwater explosion
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| GB/T 7714 | Chen, Si , Qin, Jian , Meng, Xiangyao et al. Study on the mechanism of near-field underwater explosion on supported thin plates with prefabricated holes [J]. | ACTA MECHANICA SINICA , 2024 , 40 (8) . |
| MLA | Chen, Si et al. "Study on the mechanism of near-field underwater explosion on supported thin plates with prefabricated holes" . | ACTA MECHANICA SINICA 40 . 8 (2024) . |
| APA | Chen, Si , Qin, Jian , Meng, Xiangyao , Lai, Zhichao , Wen, Yanbo , Huang, Ruiyuan . Study on the mechanism of near-field underwater explosion on supported thin plates with prefabricated holes . | ACTA MECHANICA SINICA , 2024 , 40 (8) . |
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