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学者姓名：韩强
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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 ：
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 ：
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 ：
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 ：
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 ：
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 ：
The socket connection has been considered to be an effective connection for accelerated bridge construction (ABC) due to its promising advantages, i.e., higher construction tolerance rate, simpler connection method, easier quality control method, and better seismic performance when the socket depth is sufficient. To further facilitate the promotion of socket connections, a novel double-column piers system with socket connection was proposed, and the prefabricated piers and adjacent elements are connected using Ultra High-Performance Concrete (UHPC) grouting. Three 1:3 scale double-column pier specimens using novel type socket connection, ordinary grouted corrugated duct connection, and cast-in-place connection, respectively, were subjected to pseudo-static tests, aimed to compare the effects of connection methods on the damage development, failure mode, strain distribution, and seismic performance of the double-column pier. The test results indicate that all three double-column piers with three different connection forms exhibit good seismic performance, with the failure mode being the fracture of the longitudinal rebars of the piers. Compared with the piers fabricated with the other two connection forms, the piers with socket connection feature less residual displacement, and the damage is mainly concentrated at the bottom of the pier. Additionally, numerical analysis models were devel-oped and validated for the socket-connected double-column piers to facilitate further research in this area.
Keyword ：
Socket connection Socket connection Seismic performance Seismic performance Accelerated bridge construction Accelerated bridge construction Numerical model Numerical model Double -column piers system Double -column piers system
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| GB/T 7714 | Zhang, Guangda , Su, Sibo , Han, Qiang et al. Experimental and numerical investigation of seismic performance of prefabricated double-column piers used in accelerated bridge construction [J]. | ENGINEERING STRUCTURES , 2023 , 293 . |
| MLA | Zhang, Guangda et al. "Experimental and numerical investigation of seismic performance of prefabricated double-column piers used in accelerated bridge construction" . | ENGINEERING STRUCTURES 293 (2023) . |
| APA | Zhang, Guangda , Su, Sibo , Han, Qiang , Xu, Kun , Li, Zhipeng , Du, Xiuli . Experimental and numerical investigation of seismic performance of prefabricated double-column piers used in accelerated bridge construction . | ENGINEERING STRUCTURES , 2023 , 293 . |
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Abstract ：
The wide application of friction isolation bearings has led to a rapid increase in the number of frictional isolated bridges. Therefore, the traditional method of seismic fragility analysis based on nonlinear time-history analysis (NLTHA) may not suitable for bridge portfolios. For this purpose, this study developed a multivariable probabilistic seismic demand model (MV-PSDM) for friction isolation bearings conditioned on the earthquake parameters (peak pulse velocity, pulse period), bearing parameters (effective radius) and pier parameters (bending stiffness, pier numbers, pier height), in which a novel formula is adopted to calculate the seismic demand and the dispersion is also estimated. This MV-PSDM can be applied to investigate the influence of various parameters (earthquake parameters, friction bearing parameters, pier parameters) on the seismic demand, sensitivity and the vulnerable range of the bearing. Finally, an efficient parametric fragility prediction method for friction isolation bearing is proposed based on the MV-PSDM, and the flow chart is also provided. In this method, only earthquake parameters, bearing parameters and pier parameters are required to obtain the seismic fragility of friction isolation bearings, which avoids the FE modeling and NLTHA.
Keyword ：
Structural and pulse parameters Structural and pulse parameters Multivariable PSDM Multivariable PSDM Parametric fragility analysis Parametric fragility analysis Pulse-like GMs Pulse-like GMs Friction isolation bearing Friction isolation bearing
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| GB/T 7714 | Zhong, Jian , Zhu, Yuntao , Zheng, Xianglin et al. Multivariable probabilistic seismic demand models for parametric fragility prediction of isolated bridges portfolios under pulse-like GMs [J]. | ENGINEERING STRUCTURES , 2023 , 292 . |
| MLA | Zhong, Jian et al. "Multivariable probabilistic seismic demand models for parametric fragility prediction of isolated bridges portfolios under pulse-like GMs" . | ENGINEERING STRUCTURES 292 (2023) . |
| APA | Zhong, Jian , Zhu, Yuntao , Zheng, Xianglin , Han, Qiang . Multivariable probabilistic seismic demand models for parametric fragility prediction of isolated bridges portfolios under pulse-like GMs . | ENGINEERING STRUCTURES , 2023 , 292 . |
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Abstract ：
桥梁是交通基础设施工程系统的关键工程，必须具备一定的抗震韧性，这对震后交通生命线的抢通保通和灾区重建都具有重要意义。制定合理高效的抗震韧性决策框架，是实现桥梁网络抗震韧性提升的重要途径。文章在灾害管理全周期理念的基础上，引入考虑网络连通性和流量分配的双韧性指标，提出基于地震灾害管理的桥梁网络韧性决策框架。该决策框架将管理周期划分为预防养护、应急救援与恢复使用三个阶段，在预防养护阶段，依据桥梁网络鲁棒性指标识别关键桥梁，对其进行预防性抗震加固以及资源预分配；在应急救援阶段与恢复使用阶段，基于遗传算法实现震后修复次序的优化。在此基础上，结合桥梁网络算例进行验证。研究结果表明，决策框架有效解决了资源有限条件下的桥梁网络抗震韧性提升问题，量化了预防费用与震后修复资源的分配模式对桥梁网络的韧性提升效果。
Keyword ：
抗震韧性 抗震韧性 修复策略 修复策略 预防策略 预防策略 桥梁网络 桥梁网络
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| GB/T 7714 | 张望欣 , 韩强 , 温佳年 et al. 基于地震灾害管理的桥梁网络韧性决策框架 [J]. | 土木工程学报 , 2023 , 56 (04) : 72-82 . |
| MLA | 张望欣 et al. "基于地震灾害管理的桥梁网络韧性决策框架" . | 土木工程学报 56 . 04 (2023) : 72-82 . |
| APA | 张望欣 , 韩强 , 温佳年 , 杜修力 . 基于地震灾害管理的桥梁网络韧性决策框架 . | 土木工程学报 , 2023 , 56 (04) , 72-82 . |
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Abstract ：
节点连接的有效性和可靠性、施工便捷性和抗震安全性是桥梁下部结构预制装配的关键技术。为促进预制装配桥梁下部结构的快速施工和抗震设计，基于超高性能混凝土(Ultra High-performance Concrete, UHPC)灌浆材料，提出一种施工便捷、容错率高的预制桥墩-承台承插式连接节点构造。开展了1/3缩尺比的承插式桥墩-承台节点拟静力试验，探究了剪力键、截面宽度对节点失效模式和抗震性能指标的影响规律。基于ABAQUS程序，建立了新型节点精细化有限元模型，探明了节点区的应力分布规律，进而提出了承插式节点弯矩能力预测方法。研究结果表明：当承插深度不小于柱宽的80%时，承插节点的损伤发展集中在墩柱底部，失效模式为墩柱混凝土剥落后纵筋屈曲断裂，为典型的桥墩底部塑性铰延性破坏；同时，承台处于弹性状态，验证了节点良好的抗震性能；齿键可使节点区对墩柱锚固能力提高显著，但对节点整体承载力、抗震性能指标和失效模式没有明显影响；建立的数值模型可以较精确预测承插节点的失效模式和非线性滞回行为，提出的承插节点抗弯承载能力计算方法的精确性通过试验和数值结果得以验证。研究结果以期为承插节点在中高烈度区预制装配桥梁的抗震设计和推广应用提供参考。
Keyword ：
数值分析 数值分析 抗震性能 抗震性能 弯矩能力设计 弯矩能力设计 拟静力试验 拟静力试验 承插节点 承插节点 桥梁工程 桥梁工程
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| GB/T 7714 | 张广达 , 苏思博 , 韩强 et al. UHPC灌浆预制桥墩-承台承插节点抗震性能研究 [J]. | 中国公路学报 , 2023 , 36 (10) : 368-381 . |
| MLA | 张广达 et al. "UHPC灌浆预制桥墩-承台承插节点抗震性能研究" . | 中国公路学报 36 . 10 (2023) : 368-381 . |
| APA | 张广达 , 苏思博 , 韩强 , 何维利 , 李江龙 , 许坤 et al. UHPC灌浆预制桥墩-承台承插节点抗震性能研究 . | 中国公路学报 , 2023 , 36 (10) , 368-381 . |
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