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学者姓名：胡昌斌
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Abstract ：
The motion inertia load of truck in curved road sections has significant oscillation and impact characteristics. Based on the dynamic simulation method by TruckSim and the field test of truck load, five types of standard curved road sections and load characteristic parameters were defined. The influence of the combination of curve type, radius, vehicle speed, and driving behavior on the motion inertia load is mainly studied. The research shows that the inertial load of truck in curved road sections has complex characteristics such as bifurcation, multiple motion modes, and oscillation effects, and basic characteristics such as eccentric loading, multi-directional combination of loading, and impact. Bifurcation is the most important load characteristic in curved road sections, which has complex coupling relationship with vehicle speed, curve radius and superelevation, and has critical speed effect. There are many kinds of motion modes such as lateral motion, roll motion, and yaw motion in curved road sections, and the inertial impact load is induced by the suspension spring. There are longitudinal acceleration and deceleration, braking motion, and multiple sway motion for the S-type, isotropic type, reverse type, and generalized type, and the load has oscillation effect after the curve is out. Bifurcation behavior, eccentric load, and excessive inertia impact were the main causes of premature and complex failure mode. The calculation method of load bifurcation, the value range of eccentric load, vertical and horizontal lateral impact coefficient were proposed to provide supports for pavement design and management. © 2024 Tsinghua University. All rights reserved.
Keyword ：
Automobile driver simulators Automobile driver simulators Automobiles Automobiles Automobile testing Automobile testing Bifurcation (mathematics) Bifurcation (mathematics) Highway administration Highway administration Magnetic levitation vehicles Magnetic levitation vehicles Suspensions (components) Suspensions (components) Trucks Trucks
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| GB/T 7714 | Hu, Chang-Bin , Lin, Miao , Tong, Sheng-Hao . STUDY ON FORMATION MECHANISM AND CHARACTERISTICS OF INERTIA LOAD OF TRUCK IN CURVED ROAD SECTIONS [J]. | Engineering Mechanics , 2024 , 41 (8) : 185-200 . |
| MLA | Hu, Chang-Bin 等. "STUDY ON FORMATION MECHANISM AND CHARACTERISTICS OF INERTIA LOAD OF TRUCK IN CURVED ROAD SECTIONS" . | Engineering Mechanics 41 . 8 (2024) : 185-200 . |
| APA | Hu, Chang-Bin , Lin, Miao , Tong, Sheng-Hao . STUDY ON FORMATION MECHANISM AND CHARACTERISTICS OF INERTIA LOAD OF TRUCK IN CURVED ROAD SECTIONS . | Engineering Mechanics , 2024 , 41 (8) , 185-200 . |
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弯道路段货车运动惯性荷载具有显著的振荡冲击特性,基于车辆多体系统TruckSim动力学仿真方法结合货车荷载现场试验,定义了 5类标准弯道类型和荷载特性表征参数,重点对弯道类型、半径、车速和驾驶行为等因素组合对运动惯性荷载的影响开展了研究.研究显示弯道路段货车运动惯性荷载具有分岔、多种运动模式和振荡效应等复杂特性以及偏载、荷载多向组合和冲击基本特性.分岔特性是弯道路段最重要的荷载特性,与车辆速度、弯道半径和超高存在复杂的耦合关系,且具有临界速度效应.弯道路段车辆存在侧向运动、侧倾运动和横摆运动等多种运动模式,并通过悬架弹簧诱发产生复合运动惯性冲击荷载,对于S型、同向型、反向型和广义型弯道存在纵向加减速、制动运动以及多次摇摆运动,且在出弯后荷载具有振荡效应.分岔行为、偏载和过大惯性冲击是诱发弯道路段过早复杂破坏模式和磨损的主要成因,并给出了荷载分岔计算方法、偏载、竖向和水平侧向冲击系数值域,以期为路面设计和管理提供支持.
Keyword ：
弯道路段 弯道路段 形成机制 形成机制 荷载特性 荷载特性 运动惯性荷载 运动惯性荷载 道路工程 道路工程
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| GB/T 7714 | 胡昌斌 , 林淼 , 童生豪 . 弯道路段货车复杂运动惯性荷载特性与机制研究 [J]. | 工程力学 , 2024 , 41 (8) : 185-200 . |
| MLA | 胡昌斌 等. "弯道路段货车复杂运动惯性荷载特性与机制研究" . | 工程力学 41 . 8 (2024) : 185-200 . |
| APA | 胡昌斌 , 林淼 , 童生豪 . 弯道路段货车复杂运动惯性荷载特性与机制研究 . | 工程力学 , 2024 , 41 (8) , 185-200 . |
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Compaction directly affects concrete's strength and durability. In this paper, the relationship between vibration parameters and compactness is modeled by using colored aggregates and image methods to analyze the compactness of concrete characterized by pore structure. Experiments were conducted to investigate the effects of vibrating frequency and duration on the aggregate distribution coefficient, segregation rate, and porosity of slipform concrete. The test results showed that the smaller the aggregate size under high-frequency pounding, the better the concrete compactness. In addition, the aggregate segregation rate and concrete strength increased and then decreased with the pounding length, and the greater the pounding frequency, the more pronounced the trend. Lastly, the concrete's internal porosity increased and then decreased with the pounding length. This study obtained the control range of aggregate segregation rate and porosity through analysis, and established equations for the optimal vibration parameters and paving speed of sliding form concrete to guide the reasonable control of actual sliding form paving and vibration construction processes.
Keyword ：
hole structure hole structure intensity of the concrete intensity of the concrete sliding form concrete sliding form concrete vibrating process vibrating process
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| GB/T 7714 | Chai, Min , Hu, Changbin , Cheng, Mingyue . Study on the Effect of Vibrating Process on the Compactness of Slipform Concrete [J]. | APPLIED SCIENCES-BASEL , 2023 , 13 (14) . |
| MLA | Chai, Min 等. "Study on the Effect of Vibrating Process on the Compactness of Slipform Concrete" . | APPLIED SCIENCES-BASEL 13 . 14 (2023) . |
| APA | Chai, Min , Hu, Changbin , Cheng, Mingyue . Study on the Effect of Vibrating Process on the Compactness of Slipform Concrete . | APPLIED SCIENCES-BASEL , 2023 , 13 (14) . |
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High rainfall environmental conditions can easily cause erosion or collapse of the granite residual soil slope. However, traditional slope reinforcement methods have drawbacks such as poor landscape effect, high energy consumption of raw materials, and environmental pollution. This study studied the application of microbial-induced calcite precipitation (MICP) in the reinforcement of granite residual soil. The consolidation effect of various methods was investigated, and the influence of cementing liquid concentration and pH value on consolidation under optimal curing conditions was explored. The results showed that the bacteria concentration reached OD600 = 3.0 and urease activity was 31.64 mM/min, which positively impact the production of calcium carbonate and the stability of crystal morphology. In addition, the soaking method was found to have the most effective consolidation effect on the surface soil samples, with the lowest disintegration rate. On the other hand, the peristaltic pump grouting method is the most effective in strengthening depth. This method resulted in a 513.65% increase in unconfined compressive strength (UCS), a 297.98% increase in cohesion, and a 101.75% increase in internal friction angle. This study also found that after seven rounds of grouting, the highest UCS was achieved in consolidated soil samples with a 0.5 mol/L cementing solution concentration, reaching 1.602 MPa. The UCS of soil samples increases as the pH value of the cementing fluid increases within the range of 6-8. As the pH value reaches 8-9, the strength increases and stabilizes gradually. These research findings can serve as an experimental basis for strengthening granite residual soil slopes and a guide for improving microbial geotechnical strengthening methods.
Keyword ：
cementing solution concentration cementing solution concentration granite residual soil granite residual soil MICP MICP strengthen strengthen urease activity urease activity
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| GB/T 7714 | Wang, Rong , Li, Huawei , Chen, Zichuang et al. Strength and Mechanism of Granite Residual Soil Strengthened by Microbial-Induced Calcite Precipitation Technology [J]. | APPLIED SCIENCES-BASEL , 2023 , 13 (15) . |
| MLA | Wang, Rong et al. "Strength and Mechanism of Granite Residual Soil Strengthened by Microbial-Induced Calcite Precipitation Technology" . | APPLIED SCIENCES-BASEL 13 . 15 (2023) . |
| APA | Wang, Rong , Li, Huawei , Chen, Zichuang , Liu, Fang , Wei, Muwang , Liu, Feiyu et al. Strength and Mechanism of Granite Residual Soil Strengthened by Microbial-Induced Calcite Precipitation Technology . | APPLIED SCIENCES-BASEL , 2023 , 13 (15) . |
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Airport pavements are prone to early defects during the construction phase, and their early performance during the construction phase is significantly affected by the external temperature field. This article takes the concrete pavement of Xiamen Xiang'an New Airport as an example and uses a three-dimensional (3D) humidity simulation program for cement concrete pavement to study the evolution behavior of the early stage humidity field of the pavement in a humid and hot climate environment. The results indicate that the evolution law of the humidity field of the concrete pavement slab was consistent with the environmental field, presenting a 24 h periodic variation. The environmental field had a significant impact on the humidity of the surface layer of the pavement slab, and the humidity decreased rapidly with time. There was a humidity gradient on both the horizontal plane and the cutting plane of the slab, the horizontal humidity was concentrated from the boundary into the middle of the slab, and the sectional humidity was concentrated from the top to the bottom of the slab. Environmental parameters, construction parameters, and material and structural parameters all influenced humidity through humidity exchange or by changing the saturated vapor pressure inside the slab. The humidity field was most sensitive to environmental humidity and maintenance methods, but less sensitive to material parameters and structural parameters. Through analysis, it is advisable to avoid hot seasons, choose periods of increased environmental humidity, adopt appropriate maintenance methods during construction to reduce humidity stress on the slab, and therefore decrease early stage deterioration and improve service life.
Keyword ：
cement concrete pavement cement concrete pavement early stage early stage humid and hot climate humid and hot climate humidity field humidity field
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| GB/T 7714 | Chai, Min , Hu, Changbin , Wang, Lijuan et al. Study on the Evolution Behavior of Humidity Fields in Cement Concrete Pavements of a Coastal Airport During Early Stages in Humid and Hot Areas [J]. | MATERIALS , 2023 , 16 (16) . |
| MLA | Chai, Min et al. "Study on the Evolution Behavior of Humidity Fields in Cement Concrete Pavements of a Coastal Airport During Early Stages in Humid and Hot Areas" . | MATERIALS 16 . 16 (2023) . |
| APA | Chai, Min , Hu, Changbin , Wang, Lijuan , Chen, Tao . Study on the Evolution Behavior of Humidity Fields in Cement Concrete Pavements of a Coastal Airport During Early Stages in Humid and Hot Areas . | MATERIALS , 2023 , 16 (16) . |
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Cement concrete pavement is prone to early deterioration during the construction phase, and the early performance during the construction phase is significantly affected by the external temperature and humidity field. This article selects meteorological parameters in the Fuzhou area as a typical representative of a humid and hot climate and develops a three-dimensional humidity simulation program based on Fick's law and the finite difference method to study the evolution behavior of the humidity field in early age of cement concrete pavement. It discusses the humidity distribution characteristics of road panels and analyzes the influence and sensitivity of cement type, construction conditions, and road panel structural parameters on road panel humidity. Research has shown that the evolution law of the humidity field of road panels shows a 24-h periodic change with the external environment. The environmental field has a significant impact on the surface humidity of road panels. The horizontal humidity of the panel is concentrated from the boundary to the middle of the panel, and the tangential humidity is concentrated from the top to the bottom of the panel. The humidity field of road panels is the most sensitive to environmental humidity and maintenance methods, but less sensitive to material and structural parameters. Therefore, during construction, it is possible to avoid the hot season and choose a time period when the environmental humidity increases to pour concrete. Appropriate maintenance methods are adopted to reduce the humidity stress of the panels, reduce early age deterioration, and improve their service life.
Keyword ：
cement concrete pavement cement concrete pavement early age early age hot and humid regions hot and humid regions humidity humidity
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| GB/T 7714 | Chai, Min , Wang, Lijuan , Hu, Changbin et al. Investigation into the Impact of Humidity on Early Age Cement Concrete Pavement Behavior in Hot and Humid Regions [J]. | APPLIED SCIENCES-BASEL , 2023 , 13 (18) . |
| MLA | Chai, Min et al. "Investigation into the Impact of Humidity on Early Age Cement Concrete Pavement Behavior in Hot and Humid Regions" . | APPLIED SCIENCES-BASEL 13 . 18 (2023) . |
| APA | Chai, Min , Wang, Lijuan , Hu, Changbin , Chen, Tao . Investigation into the Impact of Humidity on Early Age Cement Concrete Pavement Behavior in Hot and Humid Regions . | APPLIED SCIENCES-BASEL , 2023 , 13 (18) . |
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Premature damage to heavy-duty pavement has been found to be significantly caused by the vehicle-highway alignment interaction, especially in mountainous regions. This phenomenon was further verified by field pavement damage investigations and field tests. In order to elucidate the potential mechanism of this interaction, it is important to address the vehicle dynamic loads generated by the interaction between vehicle and pavement. Based on this, the paper realizes a new method of vehicle dynamic load prediction using data mining techniques, namely artificial neural network (ANN) and support vector machine (SVM)). The data, including dynamic loads and highway geometric characteristics, were collected by a wheel force transducer (WFT) and global positioning system (GPS), respectively. The coefficient of determination (R-2) and root mean square error (RMSE) were used to evaluate the performance of the prediction models. The results showed that the proposed dynamic load prediction model established by ANN was better than that by SVM. Moreover, the model implied that dynamic loads were highly correlated with curvature and longitudinal grade, and furthermore, curvature was found to have a larger effect. The proposed dynamic load prediction technique provides a feasible and rapid approach to identify pavement damage under complex vehicle-highway alignment interactions.
Keyword ：
data mining techniques data mining techniques dynamic loads dynamic loads pavement engineering pavement engineering prediction model prediction model vehicle-highway alignment interaction vehicle-highway alignment interaction wheel force transducer wheel force transducer
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| GB/T 7714 | Lin, Miao , Hu, Changbin , Easa, Said M. et al. A New Approach to Predict Dynamic Loads Considering Highway Alignment Using Data Mining Techniques [J]. | APPLIED SCIENCES-BASEL , 2022 , 12 (11) . |
| MLA | Lin, Miao et al. "A New Approach to Predict Dynamic Loads Considering Highway Alignment Using Data Mining Techniques" . | APPLIED SCIENCES-BASEL 12 . 11 (2022) . |
| APA | Lin, Miao , Hu, Changbin , Easa, Said M. , Jiang, Zhenliang . A New Approach to Predict Dynamic Loads Considering Highway Alignment Using Data Mining Techniques . | APPLIED SCIENCES-BASEL , 2022 , 12 (11) . |
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Based on a creep model for microprestress-solidification theory, considering the influence of material, structure and environmental parameters, a three-dimensional simulation program for early-age mechanical behavior of pavement was established, and the creep effects mechanism of three-dimensional pavement structure were analyzed. The results show that creep is a relaxation effect on early-age pavement, which significantly reduces the early-age curling and stress. The influence magnitude of creep on early-age behavior of pavement is similar to that of temperature gradient and that of edge constraint. Creep effect is also significantly affected by edge constraint, temperature gradient, humidity gradient and overall temperature conditions, and has spatial position non-uniform distribution characteristics. Under the effect of creep, the maximum relaxation position of stress is close to the middle of the restricted edge. The creep relaxation effect has significant time-dependent characteristics. It is most significant in the first 7 days and tends to be stable after 60 days. Creep relaxation effect increases significantly with temperature gradient and overall temperature increasing. Theoretical comparison shows that, ignoring the influence of temperature will underestimate the creep effect under high temperature and overestimate the creep effect under low temperature. It is recommended to use creep effect design to reduce early-age curling and stress in pavement engineering. Copyright ©2022 Engineering Mechanics. All rights reserved.
Keyword ：
Concrete pavements Concrete pavements Creep Creep Highway engineering Highway engineering Solidification Solidification Thermal gradients Thermal gradients
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| GB/T 7714 | Hu, Chang-Bin , Sun, Zeng-Hua , Wang, Li-Juan . Early-age creep effects of cement concrete pavement [J]. | Engineering Mechanics , 2022 , 39 (4) : 123-137 . |
| MLA | Hu, Chang-Bin et al. "Early-age creep effects of cement concrete pavement" . | Engineering Mechanics 39 . 4 (2022) : 123-137 . |
| APA | Hu, Chang-Bin , Sun, Zeng-Hua , Wang, Li-Juan . Early-age creep effects of cement concrete pavement . | Engineering Mechanics , 2022 , 39 (4) , 123-137 . |
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基于室内水泥水化热试验及其现场工程应用，对道路水泥的早期水化程度和水化放热特性进行了研究。研究结果表明，C_3A含量越高，其初始水解期的放热峰值和放热量越高，且水泥水化的诱导持续时间明显增加；水化加速期的放热特征主要取决于C_3S含量与水泥细度；通过控制水泥中C_3A和C_3S的含量，可有效降低道面混凝土的水化热，而提高C_4AF含量能改善道面耐磨性能；A5水泥为更适合机场道面使用的低水化热水泥，与普通水泥相比，道路水泥具有更好的抗裂和耐磨性能。
Keyword ：
收缩耐磨 收缩耐磨 水化热 水化热 水泥组分 水泥组分 道面水泥 道面水泥
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| GB/T 7714 | 陶磊 , 胡昌斌 , 刘庆全 . 道路水泥水化热特性及其应用研究 [J]. | 福建建材 , 2022 , 4 (07) : 4-7 . |
| MLA | 陶磊 et al. "道路水泥水化热特性及其应用研究" . | 福建建材 4 . 07 (2022) : 4-7 . |
| APA | 陶磊 , 胡昌斌 , 刘庆全 . 道路水泥水化热特性及其应用研究 . | 福建建材 , 2022 , 4 (07) , 4-7 . |
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依托装配式光伏路面试验段项目，将光伏路面系统设计分为装配式发电系统设计与装配式光伏路面结构设计两个部分并提出一套设计方法，同时通过试验将装配式光伏路面的建造总结为装配式光伏路面板块预制、基坑准备、混凝土配重层施工、柔性夹层施工、水电线路施工、板块平铺安装、发电系统检测共7道工序的施工方法。装配式光伏路面的应用场景可应用于山区海岛、服务区停车区、园区道路和临时道路，可依据不同应用场景进行个性化设计。
Keyword ：
光伏路面 光伏路面 工程应用 工程应用 系统设计 系统设计 装配式 装配式
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| GB/T 7714 | 何肖斌 , 胡昌斌 , 张培旭 et al. 装配式光伏路面系统设计及工程应用 [J]. | 福建交通科技 , 2022 , 6 (05) : 7-12 . |
| MLA | 何肖斌 et al. "装配式光伏路面系统设计及工程应用" . | 福建交通科技 6 . 05 (2022) : 7-12 . |
| APA | 何肖斌 , 胡昌斌 , 张培旭 , 胡序久 . 装配式光伏路面系统设计及工程应用 . | 福建交通科技 , 2022 , 6 (05) , 7-12 . |
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