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学者姓名：韩强
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Abstract ：
Self-centering structures have become the focus of current research in earthquake engineering due to their excellent re-centering capability. The re-centering capability primarily influences the residual displacement of structures that is an essential index for assessing the performance of post-earthquake functional and withstand subsequent seismic events of structures. The main purpose of this paper is to investigate the re-centering capability of partially self-centering structures with flag-shaped hysteretic behavior subjected to near-fault pulsed ground motion. To this end, the current provisions on residual displacement of structures were first introduced. Then two self-centering energy dissipation braces (SCEBs) with fully re-centering capability and partially centering capability are developed, and their hysteretic behavior are investigated by quasi-static cyclic loading tests. To capture the flag-shaped hysteretic behavior of such self-centering structures, a mathematical restoring force model based on the Bouc-Wen model is developed. It is found that the self-centering capacity of a partially self-centering structure is inversely related to the energy dissipation capacity, resulting in a reciprocal effect on the maximum and residual deformations of the structure under earthquakes. The influence of the critical parameters (including the energy dissipation ratio (beta), the post-yield stiffness ratio(alpha) and pulse period (Tp)) on the re-centering capability of the model is further investigated by using mathematical and statistical methods. Based on these results, the design recommended values of beta for models with different alpha are given, furthermore, a simplified calculation formula for residual displacement of partially self-centering structures is established based on mathematical statistics.
Keyword ：
Residual displacement Residual displacement Re-centering capability Re-centering capability Design recommendation value of beta Design recommendation value of beta Partially self-centering structures Partially self-centering structures Flag-shaped hysteretic behavior Flag-shaped hysteretic behavior
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| GB/T 7714 | Dong, Huihui , Wang, Chao , Han, Qiang et al. Re-centering capability of partially self-centering structures with flag-shaped hysteretic behavior subjected to near-fault pulsed ground motion [J]. | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2024 , 186 . |
| MLA | Dong, Huihui et al. "Re-centering capability of partially self-centering structures with flag-shaped hysteretic behavior subjected to near-fault pulsed ground motion" . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 186 (2024) . |
| APA | Dong, Huihui , Wang, Chao , Han, Qiang , Du, Xiuli . Re-centering capability of partially self-centering structures with flag-shaped hysteretic behavior subjected to near-fault pulsed ground motion . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2024 , 186 . |
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Abstract ：
桥墩结构的震后竖向承载力是评估梁式桥梁震后通行功能的重要指标，但其难以测量。为了快速定量地评估桥梁结构的震后通行能力，对评估梁式桥梁结构震后竖向承载力的最优工程需求参数(EDP)进行了系统地研究。首先选取与墩柱残余侧移和损伤相关的5个EDPs,通过对考虑了材料不确定性的RC桥墩进行Pushover分析和动力时程分析得到5个EDPs,进一步对震后的桥墩进行Pushdown分析获取震后竖向承载力。然后采用回归模型对所选EDPs与震后竖向承载力损失比的关系曲线进行回归分析，选取竖向承载力损失比关系曲线的最优回归模型为在ln(x)-y坐标系中的正态累积函数模型，进一步通过最优EDP评价准则对评估竖向承载力损失比的5个EDPs进行评价分析。评价结果表明：当考虑震后可计算性时，峰值侧移率最优；当考虑震后可测性时，残余侧移率最优；当考虑余震时，改进的Park-Ang指标最优。通过选取的最优EDP可以建立桥梁结构功能指标与抗震性能指标之间的联系，为进一步发展和完善桥梁结构的抗震韧性评估和设计提供参考。
Keyword ：
残余侧移率 残余侧移率 最优EDP 最优EDP 桥墩 桥墩 损伤程度 损伤程度 竖向承载力损失 竖向承载力损失 震后通行能力 震后通行能力
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| GB/T 7714 | 董慧慧 , 马睿 , 韩强 et al. 震后RC桥墩竖向承载力最优工程需求参数的选取方法 [J]. | 土木工程学报 , 2024 , 57 (04) : 59-70 . |
| MLA | 董慧慧 et al. "震后RC桥墩竖向承载力最优工程需求参数的选取方法" . | 土木工程学报 57 . 04 (2024) : 59-70 . |
| APA | 董慧慧 , 马睿 , 韩强 , 杜修力 . 震后RC桥墩竖向承载力最优工程需求参数的选取方法 . | 土木工程学报 , 2024 , 57 (04) , 59-70 . |
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Abstract ：
Dynamic displacement response is an essential indicator for assessing structural state and performance. Vision-based structural displacement monitoring is considered as a promising approach. However, the current vision-based methods usually only focus on certain application scenarios. This study introduces a Sparse Bayesian Learning-based (SBL) algorithm to enhance robustness, accuracy, and computational efficiency in target tracking. Furthermore, a robust and versatile Vision-based Dynamic Displacement Monitoring System (VDDMS) was developed, capable of monitoring displacements of varying application scenarios. The robustness of the proposed algorithm under changing illumination conditions is validated through a specially designed indoor experiment. The feasibility of field application of VDDMS is confirmed through an outdoor shear wall shaking table test. Furthermore, a large-scale bridge shaking table test is conducted to evaluate the reliability and versatility of VDDMS in monitoring natural feature targets on large structures subjected to different seismic excitations. The root mean square error, when compared to laser displacement sensors, ranges from 0.2% to 2.9% of the peak-to-peak displacement. Additionally, VDDMS accurately identifies multi-order frequencies in bridge structures. The study investigates the influence of initial template selection on accuracy, highlighting the significance of distinctive texture features. Moreover, two error evaluation schemes are proposed to quickly assess the reliability of vision-based displacement sensing technologies in various application scenarios.
Keyword ：
Shaking table tests Shaking table tests Illumination changes Illumination changes Dynamic displacement monitoring Dynamic displacement monitoring Large-scale structures Large-scale structures Vision-based sensing technology Vision-based sensing technology Natural feature targets Natural feature targets
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| GB/T 7714 | Zhang, Shengfei , Han, Qiang , Jiang, Kejie et al. Robust and versatile vision-based dynamic displacement monitoring of natural feature targets in large-scale structures [J]. | JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING , 2024 , 14 (8) : 1819-1837 . |
| MLA | Zhang, Shengfei et al. "Robust and versatile vision-based dynamic displacement monitoring of natural feature targets in large-scale structures" . | JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING 14 . 8 (2024) : 1819-1837 . |
| APA | Zhang, Shengfei , Han, Qiang , Jiang, Kejie , Lu, Xinzheng , Wang, Guoquan . Robust and versatile vision-based dynamic displacement monitoring of natural feature targets in large-scale structures . | JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING , 2024 , 14 (8) , 1819-1837 . |
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Abstract ：
In this paper, the shear mechanism of the novel Y-shaped (Y-S) connector encased in ultra-high-performance concrete (UHPC) was analyzed to reveal the steel-concrete interface separation mechanism and the interaction mechanism between the connector and UHPC. Subsequently, a validated finite element (FE) model was established for parametric analysis to investigate the effects of strength parameters and structural parameters on the shear performance of the Y-S connector, including the yield strength of the steel plate and penetrating rebar, the compressive strength of the concrete and UHPC, the diameter of the penetrating rebar, the effective width and thickness of the steel plate, and the dimensions of the UHPC shear pocket. The design method for the Y-S connector was finally developed and validated, including the improved shear capacity model, the shear stiffness model, the peak slip model, and the method for calculating the load-slip curves. The results indicate that the UHPC dowel in the holes experiences triaxial compressive stress, and the penetrating rebar undergoes deformation under the force from the top and bottom UHPC. The yield strength of the steel plate, as well as the effective width and thickness of the steel plate, have remarkable effects on the shear performance of the Y-S connector compared with other parameters. These analytical models can well predict the shear performance of the Y-S connector in the required precision range.
Keyword ：
Analytical models Analytical models Finite element (FE) model Finite element (FE) model Parametric analysis Parametric analysis Y-shaped (Y-S) connector Y-shaped (Y-S) connector Ultra-high-performance concrete (UHPC) Ultra-high-performance concrete (UHPC)
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| GB/T 7714 | Ni, Yulong , Hu, Menghan , Jia, Zhenlei et al. Numerical analysis and design method of Y-shaped connectors encased in UHPC for prefabricated composite bridges [J]. | ENGINEERING STRUCTURES , 2024 , 319 . |
| MLA | Ni, Yulong et al. "Numerical analysis and design method of Y-shaped connectors encased in UHPC for prefabricated composite bridges" . | ENGINEERING STRUCTURES 319 (2024) . |
| APA | Ni, Yulong , Hu, Menghan , Jia, Zhenlei , Han, Qiang . Numerical analysis and design method of Y-shaped connectors encased in UHPC for prefabricated composite bridges . | ENGINEERING STRUCTURES , 2024 , 319 . |
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Abstract ：
With the development of performance-based seismic design, the residual displacements of structures have become a key factor in determining the post-earthquake functionality and post-earthquake repair cost. However, the factors affecting the residual displacement responses of the RC structure and the corresponding influence laws have not been uniformly understood. This paper systematically investigates the influence of structural properties and ground motion characteristics on the residual displacements of the RC bridge columns, especially the near-fault pulsed ground motion characteristics. To this end, the ultimate quasi-static residual displacement and the dynamic residual displacement are first defined and introduced. Then, Bouc-Wen models and the finite element models of RC columns are selected as target models, and quasi-static analyses and dynamic time history analyses of the two models are performed to obtain the residual displacement responses. The results show that the structural properties and ground motion characteristics significantly affect the residual displacement responses of the RC bridge columns. The influence laws of structural properties on residual displacement responses of different models obtained by using different analysis methods are inconsistent, and it is also differences in the influence laws when using different residual displacement indexes. Furthermore, the residual displacement responses of the RC columns subjected to near-fault pulsed ground motions are larger compared with ground motions without pulses, and they increase with the increasing of the pulse period. The symmetrical pulsed ground motions result in higher residual displacement demands compared with antisymmetric pulsed ground motions.
Keyword ：
Residual displacement responses of RC columns Residual displacement responses of RC columns Finite element model Finite element model Bouc-Wen model Bouc-Wen model Near-fault pulsed ground motion Near-fault pulsed ground motion Quasi-static analyses Quasi-static analyses Dynamic time history analyses Dynamic time history analyses
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| GB/T 7714 | Dong, Huihui , Wang, Chao , Du, Xiuli et al. Residual displacement responses of RC bridge columns with degradation and pinching effect under near-fault pulsed ground motions [J]. | BULLETIN OF EARTHQUAKE ENGINEERING , 2024 . |
| MLA | Dong, Huihui et al. "Residual displacement responses of RC bridge columns with degradation and pinching effect under near-fault pulsed ground motions" . | BULLETIN OF EARTHQUAKE ENGINEERING (2024) . |
| APA | Dong, Huihui , Wang, Chao , Du, Xiuli , Han, Qiang . Residual displacement responses of RC bridge columns with degradation and pinching effect under near-fault pulsed ground motions . | BULLETIN OF EARTHQUAKE ENGINEERING , 2024 . |
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Abstract ：
To enhance the post-earthquake traffic flow capacity of bridge structures, various energy dissipation braces (EDBs) have been developed and applied. However, the effect of various EDBs on the improvement of the post-earthquake functionality of the bridge is difficult to evaluate mainly due to the imperfections in the functional indexes of bridge structures. This study aims to quantify the multi-level residual drift ratios of RC bridge piers based on traffic flow capacity, and to assess the seismic failure of RC bridge piers with different EDBs based on traffic flow capacity. To this end, the traffic flow was categorized into five levels based on the relationship between the traffic flow capacity and the seismic performance of the bridge. The post-earthquake performance states were evaluated on the basis of the residual drift ratio as a performance indicator, and the corresponding residual drift ratio thresholds for bridge structures under different function levels were determined as 0.06%, 0.24%, 0.49%, and 0.85% based on the numerical analysis results. Using traffic flow capacity as the limit states, the failure probabilities of the RC bridge bents with buckling restrained braces (BRBs) and self-centering energy-dissipation braces (SCEBs) were further investigated. The results show that traditional BRBs show better performance with respect to the maximum drift ratio while the SCEBs show better performance with respect to the residual drift ratio. It is indicated that the SCEB is much more effective in improving the repairability and post-earthquake traffic flow capacity of the bridge.
Keyword ：
Seismic resilience Seismic resilience Traffic flow capacity Traffic flow capacity Damage state Damage state Residual drift ratio Residual drift ratio Energy dissipation braces Energy dissipation braces RC bridge pier RC bridge pier
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| GB/T 7714 | Dong, Huihui , Huang, Hui , Ma, Rui et al. Quantification of multi-level residual drift ratios of RC bridge piers based on traffic flow capacity and its application in seismic failure assessment of RC bridge piers with EDBs [J]. | BULLETIN OF EARTHQUAKE ENGINEERING , 2024 , 22 (11) : 5917-5949 . |
| MLA | Dong, Huihui et al. "Quantification of multi-level residual drift ratios of RC bridge piers based on traffic flow capacity and its application in seismic failure assessment of RC bridge piers with EDBs" . | BULLETIN OF EARTHQUAKE ENGINEERING 22 . 11 (2024) : 5917-5949 . |
| APA | Dong, Huihui , Huang, Hui , Ma, Rui , Du, Xiuli , Han, Qiang . Quantification of multi-level residual drift ratios of RC bridge piers based on traffic flow capacity and its application in seismic failure assessment of RC bridge piers with EDBs . | BULLETIN OF EARTHQUAKE ENGINEERING , 2024 , 22 (11) , 5917-5949 . |
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Abstract ：
冲击荷载作用下混凝土响应与应力状态、应变率密切相关,数值分析存在本构模型理论复杂、参数繁多,工程应用困难等问题.基于弹塑性损伤帽盖模型,针对拉伸、压缩、剪切应力状态下混凝土的损伤特征,阐明了损伤参数取值与单元尺寸的依赖关系,提出了混凝土本构模型损伤参数及率效应参数的确定方法.然后,针对冲击作用下RC构件的弯曲与剪切损伤破坏行为,基于构件冲击试验分别从损伤参数的单元尺寸依赖性、剪胀损伤模拟必要性2个方面对混凝土弹塑性损伤帽盖模型参数取值的可靠性进行了验证,并对2种常用弹塑性损伤帽盖模型进行了对比.最后,基于某大桥船撞损伤破坏事故案例,进一步对大桥的船撞破坏过程进行了模拟验证.结果表明:采用所提出损伤参数标定方法可以很好地描述冲击作用下混凝土构件及结构在不同受力状态下的损伤演化过程及动态响应,解决了弹塑性损伤帽盖模型参数过多、取值困难而不便应用问题,可为混凝土桥梁结构冲击数值分析提供参考.
Keyword ：
混凝土桥梁 混凝土桥梁 仿真验证 仿真验证 弹塑性损伤帽盖模型 弹塑性损伤帽盖模型 参数标定 参数标定 桥梁工程 桥梁工程 低速冲击 低速冲击
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| GB/T 7714 | 宋彦臣 , 刘学鹏 , 王君杰 et al. 混凝土帽盖模型参数标定及桥梁冲击损伤模拟应用 [J]. | 中国公路学报 , 2024 , 37 (5) : 151-174 . |
| MLA | 宋彦臣 et al. "混凝土帽盖模型参数标定及桥梁冲击损伤模拟应用" . | 中国公路学报 37 . 5 (2024) : 151-174 . |
| APA | 宋彦臣 , 刘学鹏 , 王君杰 , 韩强 . 混凝土帽盖模型参数标定及桥梁冲击损伤模拟应用 . | 中国公路学报 , 2024 , 37 (5) , 151-174 . |
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Abstract ：
纤维增强复合材料(Fiber Reinforced Polymer,FRP)约束工程纤维增强水泥基复合材料(Engineered Fiber Reinforced Ce-mentitious Composites,ECC)轴压柱可显著提高其承载能力和延性,但偏压作用下FRP约束ECC柱的性能提升程度和作用机理有待研究.基于此,以偏心距(0、10、30、50 mm)和FRP层数(0、2、4层)为试验变量,对玻璃纤维增强复合材料(Glass Fiber Rein-forced Polymer,GFRP)约束ECC短柱展开了竖向加载试验,并对试验结果进行了分析.研究结果表明:小偏心破坏时受压侧FRP断裂、混凝土被压碎,大偏心破坏时受拉侧FRP撕裂与混凝土横向裂缝近乎同时出现.轴压作用下,轴向变形和抗压强度显著增大;偏压作用下,抗压承载力随着偏心距的增大而减小,而极限位移无明显变化规律.此外,承载力和延性都随着FRP层数的增加而增大.
Keyword ：
偏压试验 偏压试验 ECC短柱 ECC短柱 偏心距 偏心距 约束 约束 FRP层数 FRP层数 GFRP GFRP
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| GB/T 7714 | 史玉英 , 袁婉莹 , 韩强 . GFRP约束ECC短柱偏压试验研究 [J]. | 市政技术 , 2024 , 42 (9) : 10-18 . |
| MLA | 史玉英 et al. "GFRP约束ECC短柱偏压试验研究" . | 市政技术 42 . 9 (2024) : 10-18 . |
| APA | 史玉英 , 袁婉莹 , 韩强 . GFRP约束ECC短柱偏压试验研究 . | 市政技术 , 2024 , 42 (9) , 10-18 . |
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Abstract ：
纤维增强复合材料(Fiber reinforced polymer,FRP)已被广泛应用于既有混凝土结构的加固改造和新建结构中.FRP约束混凝土柱在地震作用下通常会受到轴压的往复循环作用,研究FRP约束混凝土在循环轴压作用下的应力-应变特性对于FRP在实际工程中的应用具有重要意义.该文提出了一种用于建模循环轴压下FRP约束混凝土柱应力-应变特性的神经网络预测模型,该模型采用长短期记忆(Long short-term memory,LSTM)单元对循环应力-应变曲线中的滞回特性进行建模,构件的物理参数被有效地集成在网络的输入中.该模型能以端到端的方式进行高效的训练且不依赖任何专家经验.制作了一个包含 166个FRP约束普通混凝土柱的循环轴压数据库,在该数据库上对模型的准确性和鲁棒性进行了充分的评估,结果表明测试集平均预测误差仅为0.32 MPa.此外,对网络结构和超参数的影响进行了详细的讨论,结果表明该模型具有出色的预测性能.
Keyword ：
机器学习 机器学习 LSTM LSTM 应力-应变曲线 应力-应变曲线 循环轴压 循环轴压 FRP约束混凝土 FRP约束混凝土
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| GB/T 7714 | 姜克杰 , 胡松 , 韩强 . 基于长短期记忆网络的FRP约束混凝土圆柱循环轴压应力-应变预测模型 [J]. | 工程力学 , 2024 , 41 (2) : 98-111 . |
| MLA | 姜克杰 et al. "基于长短期记忆网络的FRP约束混凝土圆柱循环轴压应力-应变预测模型" . | 工程力学 41 . 2 (2024) : 98-111 . |
| APA | 姜克杰 , 胡松 , 韩强 . 基于长短期记忆网络的FRP约束混凝土圆柱循环轴压应力-应变预测模型 . | 工程力学 , 2024 , 41 (2) , 98-111 . |
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Abstract ：
承插连接由于具有整体性能好、施工工序简单和拼装容许误差大等优点，成为预制装配桥墩节点的有效连接方式之一。为探明桩基础承插节点的冲切失效模式及承载力计算方法，采用ABAQUS有限元软件建立预制装配墩柱-桩基础承插节点数值计算模型，通过UHPC-NC直剪试验和墩柱-桩基础轴压试验进行了数值模型校验，研究了底板、接缝和承插连接参数对预制装配墩柱-桩基础承插节点的冲切传力机制、承载能力和失效模式的影响规律，提出了预制装配墩柱-桩基础承插节点冲切承载力计算公式。数值模拟结果表明，预制装配墩柱-桩基础承插节点的传力路径沿墩柱底部到桩的顶部；峰值荷载过后，承台底部混凝土开裂失效；接缝承载力和UHPC与混凝土之间的接触面积呈正相关，承台的冲切承载力与底板高度呈正相关。此外，当承插深度与底板高度之比由0.60增大到2.08时，接缝承载力提升了80.2%，而承插连接以及底板承载力分别降低了27.7%、52.9%，承插连接参数与底板参数具有相同的变化趋势，且底板承载力对承插连接承载力的占比较大，说明底板对承插节点承载力的贡献起主导作用。通过对已有试验和数值模拟分析，将底板和接缝的贡献系数分别取为1.00和0.92，为类似预制装配墩柱-桩基础承插节点冲切承载力的计算提供了依据。
Keyword ：
界面黏聚力 界面黏聚力 墩柱-桩基础 墩柱-桩基础 承插节点 承插节点 荷载传递路径 荷载传递路径 冲切性能 冲切性能 承载力分配关系 承载力分配关系
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| GB/T 7714 | 谢濠君 , 张广达 , 韩强 et al. 预制装配墩柱-桩基础承插节点冲切性能研究 [J]. | 市政技术 , 2024 , 42 (10) : 106-118 . |
| MLA | 谢濠君 et al. "预制装配墩柱-桩基础承插节点冲切性能研究" . | 市政技术 42 . 10 (2024) : 106-118 . |
| APA | 谢濠君 , 张广达 , 韩强 , 杜修力 . 预制装配墩柱-桩基础承插节点冲切性能研究 . | 市政技术 , 2024 , 42 (10) , 106-118 . |
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