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SSRN 2024年

作者： Zhou, Mi Zhao, Xiaonan Song, Jianwei Xu, Zitao Yin, Shujun Zhu, Guoqiang Key Laboratory for Old Bridge Detection and Reinforcement Technology Ministry of Transportation Chang’an University Xi’an710064 China Department of Civil Structural and Environmental Engineering University at Buffalo BuffaloNY14260 United States

To develop an effective pile foundation scheme for earthquake-prone regions, this study introduces a novel pile structure that integrates ultra-high-performance concrete (UHPC) with traditional prestressed high-strength concrete (PHC) pipe piles. The research focuses on assessing the impact of various connection forms between the pile and cap beam on the seismic performance of bridge substructures. Two 1/3-scale specimens were meticulously designed and tested: one featuring a cast-in-place (CIP) connection and the other incorporating precast assembly (PA) connection between the pipe pile and cap beam. Pseudo-static tests were conducted to evaluate the failure mode, lateral capacity, ductility, energy dissipation ability, and residual displacement of UHPC pipe piles with the two connection forms. The results indicate that the specimen with a CIP connection exhibits a higher horizontal load capacity and stronger energy dissipation ability, while the specimen with the PA connection displays superior self-centering ability, increased ductility, and causes less damage to the cap beam. Finally, finite element models were developed to analyze the effects of design parameters on the seismic performance of the pile connected by the two methods. This research may provide valuable design guidance for incorporating UHPC in pile foundations. To facilitate its practical implementation in engineering projects, further theoretical and experimental research is recommended in this paper. © 2024, The Authors. All rights reserved.

关键词： Piles

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Study on reasonable restraint system of double-deck frame bridge subjected to seismic action 14

Study on reasonable restraint system of double-deck frame br...

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14th International Conference on Intelligent Computation technology and Automation, ICICTA 2021

作者： Zong, X.M. Liu, Y. Yang, F. Wu, J. Wang, X.D. Zhou, M. China United Northwest Institute for Engineering Design and Research Co. Ltd Shanxi 710077 China Key Laboratory for Bridge Detection and Reinforcement Technology of the Ministry of Transportation Chang'an University Shanxi Xi'an710064 China Guangdong Communication Planning &Design Institute Co. Ltd. Guang Dong Guangzhou510507 China

In this paper, in order to improve the seismic performance of frame type double deck overpass bridge under seismic action, the most reasonable restraint system of frame double-deck overpass is studied. Based on the typical frame-type double-deck continuous overpass-hushen bridge, the finite element analysis model of the solid bridge is established. Then, from six different directions, eight different constraint combinations are established. Finally, through the analysis of the bridge direction control point of the internal force, displacement and other parameters, research and contrast the frame double-deck overpass under different constraints of the seismic response. The results show that the combination of rubber bearing, steel wire rope and concrete block can effectively limit the relative displacement between piers and beams, and reduce the internal force response of Piers and residual deformation of supports. © 2022 Institute of Physics Publishing. All rights reserved.

关键词： Piers

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Fluid-solid coupling effect of different forms of deep-water piers under earthquake

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Zhendong yu Chongji/Journal of Vibration and Shock 2022年第21期41卷 7-18页

作者： Zhou, Mi Jiang, Run Li, Jiulong Key Laboratory for Old Bridge Detection and Reinforcement Technology The Ministry of Transportation Chang'an University Xi'an710064 China Zhejiang Jiaogong Advanced-Grade Highway Maintenance Co. Ltd. Hangzhou310051 China China Design Group Co. Ltd. Nanjing210014 China

Under action of earthquake, water-structure interaction effect makes submerged part of structure produce hydrodynamic pressure. Here, to study effects of hydrodynamic effect on seismic responses of different forms of piers, and distribution laws of hydrodynamic pressure on piers, taking a large round pier, a rectangular pier and a pile group foundation with high pile cap as examples, fluid-solid coupling numerical calculation models for 3 examples were established by using the finite element method based on potential fluid, and their natural vibration characteristics analyses, seismic response analyses and hydrodynamic pressure analyses under different water depth conditions and different seismic wave inputs were performed. The results showed that increase in water depth can reduce natural vibration frequencies and increase internal force responses of 3 pier-forms;upstream surface of rectangular pier in direction of earthquake input is plane, interaction between rectangular pier and water is more obvious than that between circular pier and water, and this interaction can produce larger hydrodynamic pressure;when a certain water depth is reached, hydrodynamic pressure on circular and rectangular piers firstly increases and then decreases along pier height;hydrodynamic pressure at center position of upstream surface is the largest and gradually decreases to both sides;seismic response and hydrodynamic pressure of middle pile of pile group foundation with underwater high pile cap are smaller than those of side piles;after water depth submerges pile cap, pile cap bears most of hydrodynamic pressure, and action point of total hydrodynamic pressure on pile foundation is at position of 0.6 pile length. © 2022 Chinese Vibration Engineering Society. All rights reserved.

关键词： Seismic response

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Experimental study on the sensitive parameters of non-destructive test method for the cable based on the leakage magnetic principle 2

Experimental study on the sensitive parameters of non-destru...

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2nd International Conference on Environmental Prevention and Pollution Control Technologies, EPPCT 2020

作者： Dong, Zhenhua Fan, Ping Li, Pengfei Mao, Yan Bridge and Tunnel Research Center Research Institute of Highway Science of Transport Ministry Beijing100088 China Key Laboratory of Old Bridge Inspection and Reinforcement Technology Industry Beijing100088 China

The nondestructive testing (NDT) technique of steel rope based on the leakage magnetic principle has been extensively applied to the cable. In view of the difference of geometric characteristics, structures, loading between steel rope and cable, the applicability of the leakage magnetic NDT and the sensitive parameters on detection accuracy should be studied. So a cable specimen with local defects was designed and fabricated, and then the leakage magnetic testing technique was applied. The experimental electrical signal output of the cable were compared and analyzed. The results show that the accuracy of the test results is strictly related to the geometric characteristics of the test instrument, the depth of internal defects, the height of sensor removal, the sensitivity coefficient of the magnetically sensitive element, the defect spacing, etc., and the qualitative evaluation and individual quantitative index of the cable defects are proposed. The above conclusions can provide data support for the test quantitative index and the application of nondestructive testing technique. © 2020 IOP Publishing Ltd. All rights reserved.

关键词： Magnetic leakage

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Seismic response of rocking double-column bridge bents with external hysteretic dissipaters

Seismic response of rocking double-column bridge bents with ...

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2020 International Conference on Intelligent transportation, Big Data and Smart City, ICITBS 2020

作者： Zhou, Yulong Zhang, Jinquan Cheng, Shoushan He, Haifang Dong, Zhenhua Qiang, Han Key Laboratory of Old Bridge Inspection and Reinforcement Technology Industry Research Institute of Highway Science of Transport Ministry Beijing100088 China Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of Technology Beijing100124 China

ISBN: (纸本)9781728166971

Rocking bent is a potential alternative for seismic resistant and post-earthquake resilience of bridges. In order to study the seismic response of rocking double-column bridge bents with external hysteretic dissipaters, this paper developed an analytical model considering the impact and dissipater fracture. The benefits of dissipaters for rocking bridge bents were validated compared with the free-rocking bent. The influence of the hysteretic dissipater parameters on the seismic response of rocking bridge bent were also analyzed. The analysis considers far-field and near-field earthquake records. The study results show that the external hysteretic dissipaters have attractive benefit on the seismic response and stability of rocking double-column bridge bents. The dissipater fracture and overturning are sensitive to the distinctive pulses of near-field records, which is crucial from the design point of view. © 2020 IEEE.

关键词： Seismic response

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Experiment of Shear Performance of Epoxy Resin Joints with Single keys in Precast Concrete Segmental bridges 5

Experiment of Shear Performance of Epoxy Resin Joints with S...

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2020 5th International Conference on Minerals Source, Geotechnology and Civil Engineering, MSGCE 2020

作者： Xiaorong, Yao Hao, Chen Gao, Cheng Jilin Communications Polytechnic Changchun Jilin Province China School of Highway Chang'an University Xi'an Shaanxi Province China Key Laboratory of Bridge Detection Reinforcement Technology Ministry of Communications Xi'an Shaanxi Province China

In order to research the effect of epoxy resin thickness on the shear capacity of the epoxy resin joints of precast concrete segmental bridges, segmental bridges, one group of 6 full-depth single shear key specimens were cast and tested. Based on the experimental results, ultimate shear loads were recorded, cracking patterns and failure modes were observed. The normalized shear stress-vertical relative slip curves were investigated, and some design formulas for assessing the shear capacity of epoxy resin joints were compared and analysed. It is found that the thicker the epoxy resin thickness with the single keys is, the higher the shear capacity of epoxy resin joints is, the larger the normalized shear stress is, and the better plastic deformation capacity of epoxy resin joints is. BUYUKOZTURK O formula overestimates the shear capacity of epoxy resin joints with single keys, and several other design formulas underestimate shear capacity of epoxy resin joints with single keys;it is not appropriate to ignore the effect of epoxy resin thickness on the shear capacity of the epoxy resin joints. © Published under licence by IOP Publishing Ltd.

关键词： Epoxy resins

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Research on Transverse Restraint System of Cable-stayed bridge under Ultra High Performance Concrete Deck Pavement

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Journal of Physics: Conference Series 2022年第1期2158卷 012020页

作者： M Zhou Y Liu M Gao GQ Zhu Key Laboratory for Bridge Detection and Reinforcement Technology of the Ministry of Transportation Chang'an University Xi'an 710064 Shanxi China

In order to explore the optimal lateral restraint system for long-span cable-stayed bridges under ultra-high performance concrete deck pavement. This paper takes a UHPC deck pavement cable-stayed bridge as an example, selects four different lateral restraint systems, calculates the stress of each key section of the cable-stayed bridge under the action of an earthquake, and then selects the optimal lateral Constraint system. The research results show that when ultra-high performance concrete is used as the bridge deck pavement, the increase in the quality of the bridge deck system will have a greater adverse effect on the seismic performance of the bridge. Compare the internal force response and displacement response at each key section of the bridge under four different lateral restraint systems under earthquake action. Compared with the other three systems, the internal force response and displacement response value of the horizontal cable system is smaller, and the energy dissipation and shock absorption effect is better. For cable-stayed bridges using ultra-high performance concrete as the deck pavement, in the selection of the lateral restraint system, a restraint system of cables is set between the towers and beams, which can better reduce the impact of the increase in the quality of the bridge deck on the seismic performance of the bridge, is the most reasonable horizontal restraint method. Considering the internal force and displacement response of the bridge structure and the safety of the support under the earthquake, the parameter selection of the cable support is k = 135000 kN / m and S = 0.4 m.

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Experiment of Shear Performance of Epoxy Resin Joints with Single keys in Precast Concrete Segmental bridges

Experiment of Shear Performance of Epoxy Resin Joints with S...

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作者： Yao Xiaorong Chen Hao Cheng Gao Jilin Communications Polytechnic School of Highway Chang'an University Key Laboratory of Bridge Detection Reinforcement Technology Ministry of Communications

In order to research the effect of epoxy resin thickness on the shear capacity of the epoxy resin joints of precast concrete segmental bridges,segmental bridges,one group of 6 full-depth single shear key specimens were cast and *** on the experimental results,ultimate shear loads were recorded,cracking patterns and failure modes were *** normalized shear stress-vertical relative slip curves were investigated,and some design formulas for assessing the shear capacity of epoxy resin joints were compared and *** is found that the thicker the epoxy resin thickness with the single keys is,the higher the shear capacity of epoxy resin joints is,the larger the normalized shear stress is,and the better plastic deformation capacity of epoxy resin joints *** O formula overestimates the shear capacity of epoxy resin joints with single keys,and several other design formulas underestimate shear capacity of epoxy resin joints with single keys;it is not appropriate to ignore the effect of epoxy resin thickness on the shear capacity of the epoxy resin joints.

关键词： Experiment of Shear Performance of Epoxy Resin Joints with Single keys in Precast Concrete Segmental bridges

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Experimental study on the sensitive parameters of nondestructive test method for the cable based on the leakage magnetic principle

Experimental study on the sensitive parameters of nondestruc...

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作者： Zhenhua Dong Ping Fan Pengfei Li Yan Mao Bridge and Tunnel Research Center Research Institute of Highway Science of Transport Ministry Key laboratory of old bridge inspection and reinforcement technology industry

The nondestructive testing(NDT) technique of steel rope based on the leakage magnetic principle has been extensively applied to the cable. In view of the difference of geometric characteristics, structures, loading between steel rope and cable, the applicability of the leakage magnetic NDT and the sensitive parameters on detection accuracy should be studied. So a cable specimen with local defects was designed and fabricated,and then the leakage magnetic testing technique was applied. The experimental electrical signal output of the cable were compared and analyzed. The results show that the accuracy of the test results is strictly related to the geometric characteristics of the test instrument, the depth of internal defects, the height of sensor removal, the sensitivity coefficient of the magnetically sensitive element, the defect spacing, etc., and the qualitative evaluation and individual quantitative index of the cable defects are proposed. The above conclusions can provide data support for the test quantitative index and the application of nondestructive testing technique.

关键词： Experimental study on the sensitive parameters of nondestructive test method for the cable based on the leakage magnetic principle

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Retraction notice to "Study on damage rules on concrete under corrosion of freeze-thaw and saline solution" [Constr. Build. Mater. 304 (2021) 124617] (Construction and Building Materials (2021) 304, (S0950061821023722), (10.1016/***.2021.124617))

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Construction and Building Materials 2025年 474卷

作者： Chen, Dingshi Deng, Yuang Shen, Jiyang Sun, Guorui Shi, Jun School of Civil Engineering Central South University Changsha410075 China National Engineering Laboratory for High Speed Railway Construction Changsha China Bridge Design Institute CCCC First Highway Consultants Co. Ltd. Shaanxi Xi'an710075 China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education School of Civil Engineering Harbin Institute of Technology Harbin150090 China Key Laboratory of Bridge Detection and Reinforcement Technology of Ministry of Transport Chang'an University Shaanxi Xi'an710064 China

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://***/locate/withdrawalpolicy). This article has been retracted at the request of authors with approval of the Editor-in-Chief. Following correspondence with the corresponding author requesting to retract this paper over an authorship dispute, it was determined that significant content in this paper is based on a 2019 Chang'an University Master's thesis "Study on Damage Rules of Concrete under Corrosion of Freeze-Thaw and Saline Solution" [https://***/KCMS/detail/***?dbname=CMFD202001&filename= ***] submitted by Su Youbiao and supervised by Dr. Hu Dalin. The specimens reported as "schemes 0 through 9" in this paper are taken directly from the Chang'an University Master's thesis. Results for schemes 0 through 9 are fully reported in the Chang'an University Master's thesis (Chapter 3). No indication or acknowledgement of the source of this data is provided. Neither Su Youbiao nor Hu Dalin is credited as a coauthor. The authors agree with the need to retract this paper in order to uphold and maintain the highest standards of academic integrity. © 2025 Elsevier Ltd

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