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学者姓名：韩强
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Abstract ：
The task of identifying moving forces presents a challenging inverse problem for bridge health monitoring and condition assessment. Existing methods for identifying moving loads rely on complex structural response measurement equipment, resulting in inefficiency and elevated costs. To address these challenges, this study introduces an innovative intelligent identification method for moving forces on bridges using visual perception techniques. The proposed method utilizes cameras to capture displacement changes at specific points on the bridge surface to reconstruct moving forces in the time domain. Initially, numerical simulations were conducted to ascertain the feasibility and robustness of identifying moving forces based solely on the structural displacement response. This phase also investigates the influence of different measurement point combinations on identification accuracy. Subsequently, the accuracy of the proposed method in measuring the dynamic displacement response of the structure was carefully evaluated by an outdoor shaking table test. Furthermore, a meticulously designed simply supported beam model was fabricated, followed by the execution of precise vehicle-bridge coupling dynamic experiments. This phase rigorously validates the effectiveness and accuracy of the proposed moving force identification method at varying vehicle speeds. The obtained results substantiate the proposed approach's capability not only to comprehensively capture bridge response data for fullarea monitoring but also to consistently and reliably identify information on moving vehicle forces. This study underscores a pioneering application of intelligent visual perception technology in the field of identifying moving forces. The introduced noncontact intelligent identification method is an effective solution for monitoring moving forces on bridges, which has a wide range of applications in the future.
Keyword ：
Bridge health monitoring Bridge health monitoring Intelligent identification Intelligent identification Moving force identification Moving force identification Visual perception Visual perception Vehicle-bridge coupling Vehicle-bridge coupling
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| GB/T 7714 | Zhang, Shengfei , Ni, Pinghe , Wen, Jianian et al. Intelligent identification of moving forces based on visual perception [J]. | MECHANICAL SYSTEMS AND SIGNAL PROCESSING , 2024 , 214 . |
| MLA | Zhang, Shengfei et al. "Intelligent identification of moving forces based on visual perception" . | MECHANICAL SYSTEMS AND SIGNAL PROCESSING 214 (2024) . |
| APA | Zhang, Shengfei , Ni, Pinghe , Wen, Jianian , Han, Qiang , Du, Xiuli , Fu, Jinlong . Intelligent identification of moving forces based on visual perception . | MECHANICAL SYSTEMS AND SIGNAL PROCESSING , 2024 , 214 . |
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Abstract ：
The traditional reinforced concrete canopy using cast-in-place (CIP) technology, is associated with problems such as long construction period, high environmental pollution, and low construction quality. Prefabricated assembly technology, due to its modern and highly industrialized characteristics, provides a promising solution to address the mentioned challenges. In this study, an innovative Ultra High-Performance concrete (UHPC)-filled grouted corrugated duct connection (UGCDC) approach was introduced for prefabricated canopy beam-column joints, considering the structural characteristics of the canopy. To evaluate the seismic behavior of canopy beam-column joints utilizing the UGCDC method, three comprehensive full-scale quasi-static experiments were conducted. Meanwhile, relevant seismic behavior indexes were extracted from the hysteresis curve, and the seismic performance of canopy joints was assessed by analyzing the effects of different research parameters on seismic behavior indicators. In addition, based on the OpenSees platform, a fiber finite element model (FEM) was established that incorporated the bond-slip behavior at the UGCDC joint. The research results indicated that the seismic behavior of canopy beam-column joints using UGCDC is basically consistent with that of CIP joints, and setting a shear key in UGCDC joints can improve ductility by 22.4 %. In terms of bearing capacity, there is not much difference among the three specimens, but in terms of initial stiffness, the specimen using UGCDC and shear key and the specimen using UGCDC have increased by 6.0 % and 9.6 % compared to CIP specimen, respectively. The developed FEM can predict the hysteresis characteristic of canopy joints using UGCDC. UGCDC method is a reliable connection form for canopy beam-column connection joint, which is suitable for medium to high intensity earthquake areas. Finally, a seismic performance assessment method of prefabricated canopy beam-column joints using UGCDC was proposed.
Keyword ：
Prefabricated canopy Prefabricated canopy Seismic performance Seismic performance Beam-column joints Beam-column joints Simplified fiber model Simplified fiber model UHPC-Filled grouted corrugated ducts UHPC-Filled grouted corrugated ducts connection connection
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| GB/T 7714 | Su, Sibo , Zhang, Guangda , Han, Qiang et al. Quasi-static tests of full-scale precast canopy beam-column joints with UHPC-filled grouted corrugated ducts connection [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 96 . |
| MLA | Su, Sibo et al. "Quasi-static tests of full-scale precast canopy beam-column joints with UHPC-filled grouted corrugated ducts connection" . | JOURNAL OF BUILDING ENGINEERING 96 (2024) . |
| APA | Su, Sibo , Zhang, Guangda , Han, Qiang , Xu, Li , Zhou, Daxing , Du, Xiuli . Quasi-static tests of full-scale precast canopy beam-column joints with UHPC-filled grouted corrugated ducts connection . | JOURNAL OF BUILDING ENGINEERING , 2024 , 96 . |
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Abstract ：
This paper aimed to propose an analytical framework for assessing the postearthquake traffic flow capacity of girder bridges based on the loss model of vertical load-carrying capacity. For this purpose, a loss model of the vertical load-carrying capacity of a reinforced concrete (RC) column associated with the residual drift ratio and the damage level (i.e., the modified Park-Ang index) was developed to determine the postearthquake vertical load-carrying capacity accurately and quantitatively. Subsequently, the probability seismic demand analysis (PSDA) was performed to obtain the probability distribution functions (PDFs) of engineering demand parameters (EDPs) (i.e., the residual drift and the damage indicator) and the PDF of postearthquake vertical load-carrying capacity was determined based on the developed loss model. Furthermore, the reliability analysis was utilized to calculate the postearthquake reliability index of a bridge by adjusting the mean values of the live load (which reflects the traffic flow capacity), and the postearthquake traffic flow capacity could then be quantitatively determined based on the live load ratio at a target reliability index. Finally, the proposed framework was implemented on a single-column bridge to demonstrate its efficiency. Compared to traditional qualitative and subjective postearthquake functionality assessment of the damaged bridge, the proposed analytical approach offered a mathematical model for the decision-making process.
Keyword ：
Residual drift ratio Residual drift ratio Postearthquake traffic flow capacity of bridges Postearthquake traffic flow capacity of bridges Reliability indicator Reliability indicator Damage level Damage level Assessment framework Assessment framework Loss model of the vertical load-carrying capacity Loss model of the vertical load-carrying capacity
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| GB/T 7714 | Dong, Huihui , Ma, Rui , Han, Qiang et al. Quantitative Assessment Framework for the Postearthquake Traffic Flow Capacity of Bridges Based on the Loss Model of Vertical Load-Carrying Capacity [J]. | JOURNAL OF BRIDGE ENGINEERING , 2024 , 29 (3) . |
| MLA | Dong, Huihui et al. "Quantitative Assessment Framework for the Postearthquake Traffic Flow Capacity of Bridges Based on the Loss Model of Vertical Load-Carrying Capacity" . | JOURNAL OF BRIDGE ENGINEERING 29 . 3 (2024) . |
| APA | Dong, Huihui , Ma, Rui , Han, Qiang , Du, Xiuli . Quantitative Assessment Framework for the Postearthquake Traffic Flow Capacity of Bridges Based on the Loss Model of Vertical Load-Carrying Capacity . | JOURNAL OF BRIDGE ENGINEERING , 2024 , 29 (3) . |
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Abstract ：
Shape memory alloy (SMA) as a high-performance material with intelligent properties, has been recognized as a promising alternative solution for achieving self-centering of the structure. In this study, based on the excellent characteristics of SMA, SMA L-shaped plate was developed and applied to install on the rocking interface of the rocking column to enhance the seismic resilience, and the seismic performance of the self-centering rocking columns with SMA L-shaped plates was investigated through experiment and numerical simulation. To this end, the mechanical properties of SMA plate were firstly investigated experimentally. Then the quasi-static cyclic loading tests of the rocking column with SMA L-shaped plates were carried out, and its hysteresis behavior was investigated under different loading protocols with varying displacement amplitudes. For comparison, a rocking column with steel L-shaped plates was also tested. The experimental results showed that the rocking column with SMA L-shaped plates exhibited excellent flag-shape hysteresis behavior with satisfactory self-centering ability and stable energy dissipation capacity, and owned a large deformation capacity. Subsequently, the dynamic responses of the self-centering rocking column with SMA L-shaped plates were investigated by numerical simulation. It is found that compared to the steel L-shaped plates, the SMA L-shaped plates can effectively reduce the residual displacement responses of the rocking column and quickly restore to normal operation.
Keyword ：
Seismic performance Seismic performance Self-centering rocking columns Self-centering rocking columns SMA L-shaped plates SMA L-shaped plates Quasi-static cyclic loading tests Quasi-static cyclic loading tests Shape memory alloy (SMA) Shape memory alloy (SMA)
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| GB/T 7714 | Jia, Xianzhuo , Dong, Huihui , Su, Can et al. Seismic performance of the self-centering rocking columns with SMA L-shaped plates [J]. | STRUCTURES , 2024 , 60 . |
| MLA | Jia, Xianzhuo et al. "Seismic performance of the self-centering rocking columns with SMA L-shaped plates" . | STRUCTURES 60 (2024) . |
| APA | Jia, Xianzhuo , Dong, Huihui , Su, Can , Han, Qiang . Seismic performance of the self-centering rocking columns with SMA L-shaped plates . | STRUCTURES , 2024 , 60 . |
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Abstract ：
RC double-column medium height bents (DCMBs) are widely applied in the mountain areas as the substructure of highway bridges, and the two columns are normally connected by RC link beams to enhance the lateral stability. However, serious damage and/or large residual displacement were repeatedly observed in the DCMBs after many major earthquakes, which may make the bridges lose functionality and have to be demolished and rebuilt. In order to improve the seismic performance of the bridges, a novel self-centering variable friction dissipation brace (SCVFB) using SMA plates is developed to replace the traditional RC link beams in the DCMBs in this study. The mechanical properties of the shape memory alloy (SMA) plate were investigated experimentally. Then, the analytical model of the DCMBs with inverted-V SCVFBs (DCMB-SVFB) is built, and the corresponding design philosophies of the SCVFB in the DCMB are proposed based on the concept of structural fuse. Subsequently, the hysteretic behaviors of the DCMB-SCVFB in the transverse direction are analyzed, and the dynamic responses of the whole bridge under near-field ground motions are also investigated. For comparison, the seismic behaviors of the bridges with original bents (the bridges with and without link beams) and the bridges retrofitted with buckling restrained braces (BRBs) are also presented. The results show that the SCVFB has stable energy dissipation capability and excellent self-centering ability, even without the need of prestressing. Compared with the original bridge, the bridges with SCVFBs and BRBs are featured by higher strength, larger stiffness, better energy dissipation capacity, and less damage. In particular, the SCVFB can effectively reduce the residual displacement of the bridge and quickly restore the traffic capacity.
Keyword ：
Seismic performance Seismic performance Self-centering ability Self-centering ability Shape memory alloy (SMA) plate Shape memory alloy (SMA) plate Self-centering variable friction energy dissipation brace Self-centering variable friction energy dissipation brace RC bridges with double-column medium height bents RC bridges with double-column medium height bents
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| GB/T 7714 | Dong, Huihui , Hu, Xiao , Du, Xiuli et al. Seismic performance of RC bridges with double-column medium height bents retrofitted with SCEBs under near-field ground motions [J]. | BULLETIN OF EARTHQUAKE ENGINEERING , 2024 , 22 (5) : 2615-2641 . |
| MLA | Dong, Huihui et al. "Seismic performance of RC bridges with double-column medium height bents retrofitted with SCEBs under near-field ground motions" . | BULLETIN OF EARTHQUAKE ENGINEERING 22 . 5 (2024) : 2615-2641 . |
| APA | Dong, Huihui , Hu, Xiao , Du, Xiuli , Wen, Jianian , Han, Qiang . Seismic performance of RC bridges with double-column medium height bents retrofitted with SCEBs under near-field ground motions . | BULLETIN OF EARTHQUAKE ENGINEERING , 2024 , 22 (5) , 2615-2641 . |
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Abstract ：
To improve shear capacity, as well as reduce on-site casting and steel consumption, a novel Y-shaped perfobond rib (Y-PBL) shear connector with ultra-high-performance concrete (UHPC) grout was proposed. The shear behavior of the Y-PBL shear connector was investigated by six groups of pushout specimens. Their failure modes, load-slip curves, load-separation curves, strain analysis, and shear transfer mechanisms were discussed. Subsequently, finite-element analysis (FEA) models were established to study the effect of parameters on the shear behavior of the Y-PBL shear connector, as well as to compare the shear capacity contributions with straight-shaped PBL (S-PBL) shear connectors. Analytical models were proposed to predict the shear capacity of the Y-PBL shear connector. The results reveal that the proposed Y-PBL shear connector has superior shear capacity and stiffness. The contribution of the perforating rebar is minor compared with the end-bearing effect of UHPC. The analytical predictions agree well with the experimental and FEA results. This study can be used to guide the design and application of the Y-PBL shear connector in steel-concrete composite bridges.
Keyword ：
Ultra-high-performance concrete (UHPC) Ultra-high-performance concrete (UHPC) Perfobond rib shear connector Perfobond rib shear connector Analytical model Analytical model Shear behavior Shear behavior Shear transfer mechanism Shear transfer mechanism
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| GB/T 7714 | Ni, Yulong , Hu, Menghan , Jia, Zhenlei et al. Shear Behavior of Y-Shaped Perfobond Rib Shear Connector with UHPC Grout [J]. | JOURNAL OF STRUCTURAL ENGINEERING , 2024 , 150 (9) . |
| MLA | Ni, Yulong et al. "Shear Behavior of Y-Shaped Perfobond Rib Shear Connector with UHPC Grout" . | JOURNAL OF STRUCTURAL ENGINEERING 150 . 9 (2024) . |
| APA | Ni, Yulong , Hu, Menghan , Jia, Zhenlei , Han, Qiang . Shear Behavior of Y-Shaped Perfobond Rib Shear Connector with UHPC Grout . | JOURNAL OF STRUCTURAL ENGINEERING , 2024 , 150 (9) . |
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Abstract ：
The socket connection method is widely used in precast column, particularly in seismic regions. However, reducing the socket-depth to lower costs may lead to shear failure in the socketed part of the columns. To address this issue and achieve cost objectives, a new approach combines shallow sockets with corrugated pipes for column-footing joints. Comparative tests were conducted to investigate failure in columns with socketcorrugated pipe connections (SCPC), shallow sockets (SSC), and cast-in-place (CIP). Furthermore, finite element models were employed to validate the experimental and simplified model results. The findings suggest potential shear failure in shallow socket connections, which can be mitigated by using the combined socketcorrugated pipe method that alters force transmission paths. As the axial load ratio increases, both the ultimate lateral load capacity of the specimen and the local stresses at the column base increase. In addition, the ultimate lateral load capacity of the column and the stress of the connection reinforcement are increased by increasing the strength of the longitudinal reinforcement, consequently amplifying the extent of joint area damage. Finally, a simplified strut-and-tie model of the SCPC, validated against numerical and experimental data, accurately represents force paths, ultimate lateral load capacity and failure modes in socket joints.
Keyword ：
Socket-corrugated pipe combination Socket-corrugated pipe combination Prefabricated assembly column Prefabricated assembly column Strut-and-tie model Strut-and-tie model connection connection Force transmission path Force transmission path Numerical analysis Numerical analysis
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| GB/T 7714 | Si, Xiaolong , Song, Yanchen , Zhang, Guangda et al. Mechanical model analysis of column-footing joints with combined socket-corrugated pipe connection [J]. | COMPOSITE STRUCTURES , 2024 , 352 . |
| MLA | Si, Xiaolong et al. "Mechanical model analysis of column-footing joints with combined socket-corrugated pipe connection" . | COMPOSITE STRUCTURES 352 (2024) . |
| APA | Si, Xiaolong , Song, Yanchen , Zhang, Guangda , Han, Qiang , Du, Xiuli , Liu, Bin . Mechanical model analysis of column-footing joints with combined socket-corrugated pipe connection . | COMPOSITE STRUCTURES , 2024 , 352 . |
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Abstract ：
Reinforced concrete (RC) single-column piers (SCPs) and double-column piers (DCPs) are widely used in highway girder bridges. However, the seismic behavior of conventional RC DCPs has not received sufficient attention. This study aimed to investigate the seismic behavior of DCPs, especially the comparison of the failure mechanism, hysteretic behavior, and dynamic response between SCPs and DCPs. To this end, the critical performance parameters between SCPs and DCPs in the elastic phase were first calculated according to the simplified calculation formulas. Eight 1/3 scaled SCPs and DCPs were then fabricated and tested under quasi-static cyclic loading, and the effective height of the DCPs was twice that of the SCPs. The test results showed that the failure modes and damage mechanisms between the SCPs and DCPs are obviously different. In particular, the plastic damage states at the top and bottom of each column in the DCP were asymmetric, and this behavior was also observed on both sides of each plastic hinge region. Subsequently, the relationship between the performance parameters of SCP and DCP in the plastic phase differed from that of the elastic phase and was not proportional. Existing formulas for calculating the plastic hinge length of SCPs cannot effectively predict DCPs and may even underestimate it. Furthermore, numerical simulations were analyzed to investigate the effects of various design parameters and ground motions on the seismic behavior of the SCPs and DCPs.
Keyword ：
Plastic hinge length Plastic hinge length Quasi-static cyclic loading tests Quasi-static cyclic loading tests Hysteresis behavior Hysteresis behavior Reinforced concrete (RC) double-column piers Reinforced concrete (RC) double-column piers RC single-column piers RC single-column piers Failure mechanism Failure mechanism
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| GB/T 7714 | Dong, Huihui , Feng, Wenhao , Zheng, Zicheng et al. Experimental Investigation on Failure Mechanism and Hysteresis Behavior of RC Single- and Double-Column Piers [J]. | JOURNAL OF BRIDGE ENGINEERING , 2024 , 29 (12) . |
| MLA | Dong, Huihui et al. "Experimental Investigation on Failure Mechanism and Hysteresis Behavior of RC Single- and Double-Column Piers" . | JOURNAL OF BRIDGE ENGINEERING 29 . 12 (2024) . |
| APA | Dong, Huihui , Feng, Wenhao , Zheng, Zicheng , Han, Qiang , Du, Xiuli . Experimental Investigation on Failure Mechanism and Hysteresis Behavior of RC Single- and Double-Column Piers . | JOURNAL OF BRIDGE ENGINEERING , 2024 , 29 (12) . |
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Abstract ：
Accurate identification of impact loads is vital for structural assessment and design. Traditional methods rely on complex equipment, such as accelerometers or strain gauge, which can be expensive and prone to failure. This study introduces a non-contact intelligent identification approach incorporating visual sensing technology, providing a convenient means to identify impact loads. Numerical simulations explore the differences in identifying impact forces through acceleration and displacement responses, particularly by considering such variables as measurement noise and number of measurement points. A meticulously designed experiment verified the feasibility of the proposed method for measuring the displacement and velocity of rapidly moving targets, and evaluated its performance in terms of accuracy. A series of impact loading experiments were conducted on a simply supported girder bridge model to validate the effectiveness of the proposed impact force identification method. Results indicate strong agreement between displacement response measurements and percentile meters. The proposed non-contact method accurately identifies single or continuous impact loads, with a minimum peak relative error of 0.2%. This study represents a pioneering application of intelligent visual sensing technology in the field of impact load identification. Moreover, the current research introduces a novel approach to address the challenges faced by conventional methods in identifying impact loads. Future research can leverage the groundwork laid by this study to further optimize and expand the proposed method, enhancing its capabilities and fully harnessing its potential to offer advanced solutions in structural health monitoring.
Keyword ：
intelligent visual perception intelligent visual perception bridge impact loads bridge impact loads Structural health monitoring Structural health monitoring Tikhonov regularization Tikhonov regularization dynamic load identification dynamic load identification
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| GB/T 7714 | Zhang, Shengfei , Ni, Pinghe , Wen, Jianian et al. Non-contact impact load identification based on intelligent visual sensing technology [J]. | STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL , 2024 , 23 (6) : 3525-3544 . |
| MLA | Zhang, Shengfei et al. "Non-contact impact load identification based on intelligent visual sensing technology" . | STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL 23 . 6 (2024) : 3525-3544 . |
| APA | Zhang, Shengfei , Ni, Pinghe , Wen, Jianian , Han, Qiang , Du, Xiuli , Xu, Kun . Non-contact impact load identification based on intelligent visual sensing technology . | STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL , 2024 , 23 (6) , 3525-3544 . |
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Abstract ：
This study developed a novel prefabricated self-centering U-shaped SMA-Steel hybrid plate damper (SMA-SteelUD) based on the excellent characteristics of SMA, to reduce the residual deformation of the conventional Ushaped Steel plate damper under severe earthquakes. The developed SMA-Steel-UD consisted of U-shaped SMA plates (SMA-Us) and U-shaped steel plates (Steel-Us) assembled in parallel, and its working principle was introduced and the analytical model was established. Then, the mechanical properties of SMA plate were firstly investigated experimentally, and the test results showed that the SMA plate behaved large self-centering capacity and great deformability. Subsequently, the quasi-static cyclic loading tests of the components of the damper including U-shaped SMA plate damper (SMA-UD) and U-shaped Steel plate damper (Steel-UD) and the whole damper were carried out to investigate the hysteretic performance, and to further validate the established analytical model. The experimental results showed that the SMA-Steel-UD exhibited satisfactory flag-shape hysteresis behavior with excellent self-centering ability and stable energy dissipation capacity, and owned a large deformation capacity. Parametric studies were further performed to evaluate the influences of the key parameters of SMA-Steel-UD on the hysteretic performance. To ensure the excellent self-centering capacity of the damper, the total self-centering force of the U-shaped SMA plates should be greater than the total yield force of the U-shaped steel plates.
Keyword ：
Shape memory alloy (SMA) plate Shape memory alloy (SMA) plate SMA-steel-UD SMA-steel-UD Self-centering capacity Self-centering capacity Hysteresis performance Hysteresis performance Quasi-static cyclic loading test Quasi-static cyclic loading test
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| GB/T 7714 | Hu, Xiao , Dong, Huihui , Su, Can et al. Experimental and numerical studies on hysteresis performance of U-shaped SMA-steel plates damper [J]. | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 219 . |
| MLA | Hu, Xiao et al. "Experimental and numerical studies on hysteresis performance of U-shaped SMA-steel plates damper" . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 219 (2024) . |
| APA | Hu, Xiao , Dong, Huihui , Su, Can , Han, Qiang , Du, Xiuli . Experimental and numerical studies on hysteresis performance of U-shaped SMA-steel plates damper . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 219 . |
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