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Full-scale experimental and numerical investigation on performance enhancement of slab bridge based on arched corrugated steel exoskeleton

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Structures 2025年 78卷

作者： Wang, Xiaoming Chen, Yu Liu, Liang Zhao, Jianling Wu, Qian Sun, Chenjing Qiu, Hongjie Key Laboratory of Transport Industry of Bridge Detection Reinforcement Technology Chang'an University Shaanxi Xi'an710064 China School of Highway Chang'an University Shaanxi Xi'an710064 China National Key Laboratory of Bridge Safety and Resilience Beijing University of Technology Beijing100124 China China Railway Design Corporation Tianjin300142 China

As a widely used structure for small-span bridges, concrete slab bridges face an increasingly prominent risk of deterioration and even collapse due to heavy vehicle load and environmental corrosion, posing a serious threat to bridge safety. To address these challenges and meet growing transportation demands without disrupting traffic, an innovative active reinforcement method for small-span slab bridges based on Arch Corrugated Steel Exoskeleton (ACSE) is proposed in this paper. The proposed reinforcement approach enhances the load-bearing capacity by applying precompression to ACSE, allowing it to actively share both the dead and live load of the slab bridge. The reinforcement procedure and connections of ACSE to slab bridges are carefully designed. To evaluate the performance of this method, three full-scale experiments were conducted on 5-meter-span slabs. The results show that the ACSE method increases the flexural ultimate bearing capacity of the slab by 22.78 % and shares up to 60.00 % of the slab's self-weight. Additionally, a numerical model for ACSE reinforcement is validated using experimental data and utilized to explore the feasibility of different ACS-slab connections as well as different arched corrugated steel (ACS) corrugations. Further parameter analysis reveals that the bearing capacity of the test slabs increases when the thickness and corrugation of the ACS increase. The dead load sharing effect of the ACSE is not significantly influenced by the connection type but is heavily affected by the applied precompression and the stiffness of the ACS. Moreover, the live load sharing effect becomes more pronounced with larger ACS plate thicknesses and cross-sectional sizes. © 2025 Institution of Structural Engineers

关键词： Concrete slabs

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Boundary self-adaptive harmony design for accelerated system transformation construction of self-anchored suspension bridges

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Structures 2025年 77卷

作者： Wang, Xiaoming Li, Chenxi Zhang, Jiesheng Sun, Yuan Tao, Pei Yang, Wenjie Huo, Xuejin Luo, Xiaoyu Key Laboratory of Transport Industry of Bridge Detection Reinforcement Technology Chang'an University Shaanxi Province Xi'an710064 China The First Engineering Co. Ltd. of CTCE Group Anhui Province Hefei230000 China School of Civil and Hydraulic Engineering Huazhong University of Science and Technology Wuhan Province Hubei430074 China Gansu Provincial Transportation Planning and Surveying Design Institute Co. Ltd Gansu Province Lanzhou730000 China China Railway Major Bridge Reconnaissance & Design Institute Group Co. Ltd Hubei Province Wuhan430056 China

The key step in constructing a self-anchored suspension bridge (SASB) is system transformation, in which the stiffened girder is gradually connected to the cable system via hanger installation to form a complete structure. This stage, with multiple nonlinearities, generally involves cumbersome procedures, lengthy time periods, and serious interference, to a great extent, due to a lack of efficient handling of permanent boundary displacement effects. In this study, the reasons for these effects, identified as pull-out, deflection, and shear, along with their impacts on structural safety and construction plans, are analytically investigated. An innovative boundary self-adaptive harmony design is then proposed to mitigate those effects by forcing the system to an optimal self-balancing state at each stage while shortening the system transformation cycle for accelerated construction. To achieve this aim, three self-adaptive devices, namely, the bearing connection device, rolling saddle device, and displacement adjustment device, are developed. The feasibility and effectiveness of the design are demonstrated through real examples. © 2025 Institution of Structural Engineers

关键词： Structural analysis

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Comparison and Applicability Research of Prestressed Duct Pumpness Contemporary Major Nondestructive detection technology

Comparison and Applicability Research of Prestressed Duct Pu...

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2018年先进电子材料、计算机与材料工程国际学术会议（AEMCME 2018）

作者： CHEN Jianzhang ZHANG Kechao ZHENG Yi Research Institute of Highway Ministry Transport Key Laboratory of Old Bridge Detection and Reinforcement Technology Ministry of Transport

ISBN: (纸本)9781510874466

Prestressed reinforcement is one of the most hidden and important project in bridge enginerring. It directly determines the structure of the bending, shear, anti vibration, anti impact performance, it also has influence on the safety and durability of the structure. To evaluate old bridge structure, it is required to detect the internal reinforced distribution(quantity, specifications, protection layer thickness). In addtition, due to poor construction quality, position of prestressed tendons biased, and grouting can not get guarantee, which leads to serious corrosion of prestressing tendons, consequently in potential safety hazard. All above indicate that by using nondestructive method, it is significant to locate the prestressed tendon and define the quantative and distribution in structure. Then, it is required to evaluate the grouting condition of prestressed ducts, and regrouting for the flaw ducts. This paper focuses on several current famous prestressed grouting nondestructive detection methods, combining the characteristics of the actual bridge structure, and the accuracy of each method is obtained. Results is compared with applicability and pertinency. Research results provide method and basis for detecting subsequent prestressed bridge.

关键词： red Comparison and Applicability Research of Prestressed Duct Pumpness Contemporary Major Nondestructive detection technology

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Research on the influence of the aerodynamic measure on the flutter derivative of the steel truss suspension bridge

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2012 2nd International Conference on Materials Science and Information technology, MSIT 2012

作者： Hua, Bai Wei, Guo Wei, Li Yu, Li Key Laboratory of Ministry of Communications for Bridge Detection and Reinforcement Technology Chang'an University Xi'an 710064 China

ISBN: (纸本)9783037854389

Flutter derivative is a significant index of the structure flutter stability. Identifying flutter derivative precisely contributes to the bridge flutter stability analyzing. In this paper, we take a research on the Liujiaxia bridge in Gansu Province, China. Different flutter derivatives, which were got via segment model vibration tests with different aerodynamic measures, were classified, and made comparison in order to get the law of how different aerodynamic measures effect on the flutter derivative. The results show that, setting central stabilized plate, Build-in deflector, flange plate all affect flutter derivative significantly, which leads to changes in the flutter critical wind velocity of the structure. Setting central stabilized plate above the deck contributes to identify the flutter derivative of the 0° and positive attack angle, while setting central stabilized plate will contribute to flutter derivative identification at negative angles. It will make it difficult to identify the flutter derivative at 0° and -3° if the built-in deflector was set. Wind plate contributes to the identification of the flutter derivative at +3°, however, it will make it harder to identify the flutter derivative at 0° and -3°. © (2012) Trans Tech Publications, Switzerland.

关键词： Suspension bridges

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Fuzzy comprehensive evaluation for dampers of inclined cables

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2013 3rd International Symposium on Chemical Engineering and Material Properties, ISCEMP 2013

作者： Xue, Xiao-Feng Xue, Xiao-Jie Li, Yang Wu, Xian-Hui Key Laboratory of Ministry of Communications for Bridge Detection and Reinforcement Technology Chang'an University Xi'an 710064 China

ISBN: (纸本)9783037858363

Installing, seismic affections cost and complexity of maintenance are different due to the different mechanical of dampers. With the data collected from experts, this paper calculates the weight of indexes by the method of Delphi firstly, and then evaluates dampers of cables by fuzzy comprehensive method. Conclusions are drawn as follows: (1) Reliability is the most important factor to evaluates dampers;(2) Oil damper and MR damper are weak in reliability, economics and complexity of maintenance compare with other dampers;(3) High damping rubber, viscous damper and friction damper lead the top three of all the dampers. Meaningful references are provided for engineers to select dampers for cables according the character of cable stayed bridges. © (2013) Trans Tech Publications, Switzerland.

关键词： Cable stayed bridges

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Wind tunnel test and the analysis of buffeting performance of free-standing tower of cable-stayed bridge under yaw wind

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2012 2nd International Conference on Materials Science and Information technology, MSIT 2012

作者： Zhao, Guohui Li, Yu Bai, Hua Key Laboratory of Ministry of Communications for Bridge Detection and Reinforcement Technology Chang'an University Xi'an 710064 China

ISBN: (纸本)9783037854389

The buffeting performance of free-standing tower of JiangHai Navigation Channel bridge, a cable-stayed bridge, under yaw wind is investigated by means of wind tunnel test of aeroelastic model. It is found that the variation of buffeting response of free-standing tower with wind yaw angle is not monotonous. The lateral buffeting response on the top of the free-standing tower reach their minimal values and maximal values at around 150°and 180°of wind yaw angle respectively and the longitudinal buffeting response attain their maximal values at around 90°of wind yaw angle. Also, at the 2/3 height of the tower the lateral buffeting response and torsional buffeting response get their minimal values at around 150°of wind yaw angle, and at around 180°achieve the maximal values. It is also seen that, the buffeting response changes with the wind speed at a conic curve approximately. © (2012) Trans Tech Publications, Switzerland.

关键词： Towers

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The stress monitoring analysis of PC continuous beam bridge

The stress monitoring analysis of PC continuous beam bridge

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International Conference on Machine Tool technology and Mechatronics Engineering, ICMTTME 2014

作者： Yang, Ya Xun Fan, Wei Ya Key Laboratory for Old Bridge Detection and Reinforcement Technology of Ministry of Transportation Chang’an University Xi’anShaanxi China

ISBN: (纸本)9783038352464

According to the structure and construction characteristics of PC continuous beam bridge and combined with the construction monitoring method of continuous beam bridge, this paper introduces the girder stress strain test technology and method of prestressed concrete continuous box girder bridge, also analyzes the various factors which affect the stress test. After monitoring LinGang big bridge, draw the conclusion through the analysis of its stress and strain. © (2014) Trans Tech Publications, Switzerland.

关键词： Box girder bridges

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Research on Transverse Restraint System of Cable-stayed bridge under Ultra High Performance Concrete Deck Pavement 14

Research on Transverse Restraint System of Cable-stayed Brid...

引用

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

作者： Zhou, M. Liu, Y. Gao, M. Zhu, G.Q. Key Laboratory for Bridge Detection and Reinforcement Technology of the Ministry of Transportation Chang'an University Shanxi Xi'an710064 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. © 2022 Institute of Physics Publishing. All rights reserved.

关键词： Cable stayed bridges

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The linear monitoring analysis of PC continuous beam bridge

The linear monitoring analysis of PC continuous beam bridge

引用

International Conference on Machine Tool technology and Mechatronics Engineering, ICMTTME 2014

作者： Yang, Ya Xun Gong, Gao Key Laboratory for Old Bridge Detection and Reinforcement Technology of Ministry of Transportation Chang’an University Shaanxi Xi’an China

ISBN: (纸本)9783038352464

According to the structure and construction characteristics of prestressed concrete (PC) continuous beam bridge and combined with the construction monitoring method of continuous beam bridge, this paper introduces the girder deflection test technology and method of prestressed concrete continuous box girder bridge, also analyzes the various factors which affect the linear monitoring. And draw the conclusion through the analysis of the deflection and linear monitoring of LinGang big bridge. © (2014) Trans Tech Publications, Switzerland.

关键词： Prestressed concrete

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Research on the impact of damping to the flutter derivatives of steel truss suspension bridge

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2012 2nd International Conference on Materials Science and Information technology, MSIT 2012

作者： Hua, Bai Cheng, Fang Yu, Li Key Laboratory of Ministry of Communications for Bridge Detection and Reinforcement Technology Chang'an University Xi'an 710064 Xi'an China

ISBN: (纸本)9783037854389

The flutter derivative is the important basic tache of bridge flutter stability analysis. Taking the Liujiaxia bridge in Gansu province as the research object, this dissertation studies the impaction of damping ratio on the flutter derivatives and the critical wind speed through different series of section model vibration test. The results showed that the change of vertical bending and torsional damping ratio have no obvious regular influence on the eight flutter derivatives. But the changing of vertical bending and torsional damping ratio have the greatly impact on the critical wind speed at 0° and -3° angle of attack. When it is at 0° angle of attack, the vertical bending damping ratio ζh is increased by 23%,the torsional damping ratio is increased by 0.63%, the flutter critical wind speed is increased by 4%;when the ζh is increased by 1.04%, the ζα is increased by 0.87%, the flutter critical wind speed is increased by 7%. When it is at -3° angle of attack, the vertical bending damping ratio remained around 0.8%, the torsional damping ratio is increased from 0.65% to 1.05%, the flutter critical wind speed is increased by 14%;when the ζα is increased from 0.65% to 2.05%, the flutter critical wind speed is increased by 24 %.When it is at +3 °angle of attack, the vertical bending and torsion damping ratio have little effect on the flutter critical wind speed. © (2012) Trans Tech Publications, Switzerland.

关键词： Angle of attack

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