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Articles 481 - 510 of 591

Full-Text Articles in Structural Materials

Design And Development Of Two And Three Dimensional Integration System For Highway Based On Webgis, Che Defu, Zhou Huajun May 2023

Design And Development Of Two And Three Dimensional Integration System For Highway Based On Webgis, Che Defu, Zhou Huajun

Journal of China & Foreign Highway

To address the inefficiencies, lengthy cycles, and high resource demands in the process of determining the annual project database for highway maintenance quotas in Liaoning Province, a 2D and 3D integration system for highways based on WebGIS was designed and developed. This system not only provides a macroscopic view of the geographic distribution and overall characteristics of highways but also offers a detailed and intuitive representation of the spatial relationships and conditions of roadbeds and pavement damage. The system meets the needs of modern highway management and can serve as a reference for other highway maintenance quota tasks.

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Research On Influence Factors And Efficiency Analysis Of Expressway Maintenance Marketization, Zhong Wen, He Shoukui, Wang Xiaodong May 2023

Research On Influence Factors And Efficiency Analysis Of Expressway Maintenance Marketization, Zhong Wen, He Shoukui, Wang Xiaodong

Journal of China & Foreign Highway

To promote market-oriented reform of highway maintenance, this paper investigates its influencing factors and outcomes and proposes an evaluation model for assessing its effects. A panoramic analysis method within a three-dimensional framework was employed to determine the evaluation content. Drawing on the balanced scorecard concept, the analysis incorporates four dimensions: business, user, internal management, and learning and growth, with the innovative addition of a social responsibility dimension to construct an evaluation indicator system. Subsequently, a cloud-based extension model was developed to evaluate the effectiveness of expressway maintenance marketization and calculate the evaluation grade. Empirical analysis was conducted using data from …

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Analysis Of Expressway Routine Maintenance Performance Management Based On Dea, Li Yuhuan, Shi Xiaoli, Gao Nan May 2023

Analysis Of Expressway Routine Maintenance Performance Management Based On Dea, Li Yuhuan, Shi Xiaoli, Gao Nan

Journal of China & Foreign Highway

To allocate maintenance resources efficiently and improve management levels, this paper examines the maintenance performance and improvement strategies of routine maintenance projects for 23 expressways in Shaanxi Province using 2018 operational maintenance data and data envelopment analysis. The results show that for some inefficient subsidiaries, traditional radial- and slack-based performance improvement methods are challenging and impractical in the short term. Therefore, a scenario-dependent model-based long-term incremental improvement strategy is proposed. By leveraging relative improvement values, this strategy enables phased improvements for inefficient subsidiaries. It provides a feasible approach for subsidiaries to set lower short-term performance improvement targets while achieving gradual …

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Study On The Minimum Radius Of Vertical Curve Of Highway Main Line Entrance Section Based On Merging Sight Distance, Li Yang, Zhao Yemei, Chen Tianxing May 2023

Study On The Minimum Radius Of Vertical Curve Of Highway Main Line Entrance Section Based On Merging Sight Distance, Li Yang, Zhao Yemei, Chen Tianxing

Journal of China & Foreign Highway

Given the limited research on the vertical curve radius of highway mainline entrance sections and the lack of differentiation between entrance and exit sections in existing studies, this paper identifies merging sight distance as the primary influencing factor for the vertical curve radius of entrance sections. Using merging sight distance as the control condition, the vertical curve radius of entrance sections was studied. A safety merging sight distance calculation model for highway mainline entrance sections was established by analyzing the traffic behavior characteristics of vehicles on the entrance mainline and considering drivers’ psychological and physiological characteristics. The sight distance model …

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Analysis On Influence Factors Of Swelling Deformation Of Gravel Pile In Soft Soil Area Based On Orthogonal Numerical Test, Fan Liujun, Lu Xiaoming, Miao Peng Mar 2023

Analysis On Influence Factors Of Swelling Deformation Of Gravel Pile In Soft Soil Area Based On Orthogonal Numerical Test, Fan Liujun, Lu Xiaoming, Miao Peng

Journal of China & Foreign Highway

The gravel pile composite foundation is usually accompanied by swelling deformation when vertical settlement deformation occurs. The research on the swelling deformation characteristics and influencing factors of gravel pile composite foundations is of great importance for analyzing the settlement rule and deformation mechanism of gravel pile composite foundations. Based on an orthogonal numerical test, this paper used the finite element software Midas GTS to analyze the main influencing factors of the swelling deformation of the gravel pile and used range and variance analysis to analyze the sensitivity and significance of each influencing factor. Finally, through regression analysis, the optimized swelling …

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Study On Ultimate Bearing Capacity Characteristics Of Overlying Shell Foundation, Bian Guirong, Li Fuyou, Qian Xiaotong, Xie Ke Mar 2023

Study On Ultimate Bearing Capacity Characteristics Of Overlying Shell Foundation, Bian Guirong, Li Fuyou, Qian Xiaotong, Xie Ke

Journal of China & Foreign Highway

For the calculation of the ultimate bearing capacity of the overlying hard crust foundation, based on the theory of Meerhoff and Hanna’s impact and shear failure, the sealing effect and stress diffusion effect of the overlying hard crust foundation were considered, and the formula for calculating the ultimate bearing capacity of the overlying hard crust double-layer foundation was derived and verified by an actual engineering example. The maximum error between the measured value and the calculated value of Hansen’s weighted average method, diffusion angle method, and Meerhoff and Hanna’s method was 74.2%, 31.5%, and 15.2% respectively, while the error was …

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Analysis On Pavement Early Damage Characteristics And Influence Factors Of Baiyin Section Of National Highway 109, Shi Fuzhou, Han Fei, Tang Dandan, Liu Wuwen, Zhang Jinyuan Mar 2023

Analysis On Pavement Early Damage Characteristics And Influence Factors Of Baiyin Section Of National Highway 109, Shi Fuzhou, Han Fei, Tang Dandan, Liu Wuwen, Zhang Jinyuan

Journal of China & Foreign Highway

In order to explore the cause of early damage of highway asphalt pavement in Baiyin area of Gansu Province, this paper analyzed the main factors that affected the performance of asphalt pavement and investigated the use of asphalt pavement in this area, climate environment, and traffic conditions. By taking Baiyin section of National Highway 109 as an example, the specific data were deeply analyzed. Based on the investigation of pavement use, the situation and decay rule of local asphalt pavement were summarized. According to the investigation of the climate environment, the influence of solar radiation, temperature difference, and other conditions …

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Test And Finite Element Analysis On Flexural Properties Of Steel Plate‒Uhpc Composite Beam, Huang Yun, Zhao Hua, Tu Lei Mar 2023

Test And Finite Element Analysis On Flexural Properties Of Steel Plate‒Uhpc Composite Beam, Huang Yun, Zhao Hua, Tu Lei

Journal of China & Foreign Highway

In order to study the flexural properties of steel plate-ultra-high performance concrete (UHPC) composite beams, the static test of the flexural properties of a steel sheet-UHPC composite beam was first carried out. Then, Abaqus finite element software was used to simulate the whole process of static loading of the specimen, and different ways were used to simulate the studs in the composite beam. The most appropriate model was thus selected. Finally, based on the calibrated finite element model, the parameters of the steel plate-UHPC composite beam were analyzed, the main parameters included: UHPC compressive strength, steel plate strength, and stud …

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The Calculation Theory Of Humidity For Subgrade ：A Perspective Review Mar 2023

The Calculation Theory Of Humidity For Subgrade ：A Perspective Review

Journal of China & Foreign Highway

Subgrade humidity has a significant impact on its stiffness, deformation, and other properties. The theoretical calculation method of humidity field has always been one of the key issues in road engineering as a research method to evaluate its evolution law and mechanism. This paper reviewed and summarized the control equation of subgrade humidity calculation, hydraulic characteristics of unsaturated subgrade soil, and influencing factors of humidity. It was found that there were few studies on the coupling effects of multiple fields and factors such as stress, seepage, vegetation, and atmosphere in the whole calculation method system. It is suggested to carry …

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Field Experiment On Deep Response Of Slope Subjected To Different Rainfalls In Plateau Mountainous Area Of Northwest Yunnan, Chen He, Lu Zhiqiang, Li Guo, Chen Zhengyu Mar 2023

Field Experiment On Deep Response Of Slope Subjected To Different Rainfalls In Plateau Mountainous Area Of Northwest Yunnan, Chen He, Lu Zhiqiang, Li Guo, Chen Zhengyu

Journal of China & Foreign Highway

In order to investigate the characteristics and mechanism of deep response of slopes subjected to different rainfalls in plateau mountainous area of Northwest Yunnan, remote real-time monitoring devices were deployed to carry out slope prototype field tests, analyze the effects of natural rainfalls in different forms and intensities on deep displacement and groundwater level changes, and put forward suggestions for landslide monitoring and early warning. The results show that the characteristics of heavy rainfall, steep slope, and rock fragmentation during flood season can induce the frequent fluctuation of groundwater level in the deeper part of the slope, which results in …

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Experimental Study On Shear Strength Of Ehp Piles, Wang Nanjiang, Liu Jianlong, Qiu Chengchun, Zhang Yuting, Tao Xiaoyu Mar 2023

Experimental Study On Shear Strength Of Ehp Piles, Wang Nanjiang, Liu Jianlong, Qiu Chengchun, Zhang Yuting, Tao Xiaoyu

Journal of China & Foreign Highway

The new environmental homogeneous plastic (EHP) pile improves the construction technology of traditional soil-cement mixing piles. It mixes the soil-cement slurry evenly in advance and then pours it into holes, so as to form piles with controllable physical properties. In order to test the strength of EHP piles, direct shear tests were carried out on field core sampling, field stirring sampling, and laboratory sampling, and the effects of pile depth, cement content, age, and curing conditions on shear strength were discussed. The test results show that the shear stress-displacement curve of the in-situ core sample is strain-softening; the shear strength …

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Review And Outlook For Long‐Life Asphalt Pavement, Xu Xizhong, Wei Jincheng, Yan Xiangpeng, Zhang Zhengchao Mar 2023

Review And Outlook For Long‐Life Asphalt Pavement, Xu Xizhong, Wei Jincheng, Yan Xiangpeng, Zhang Zhengchao

Journal of China & Foreign Highway

In order to make clear the research status of long-life asphalt pavement in China and abroad, this paper summarized the development characteristics, pavement structure, design index, pavement material, dynamic response analysis of pavement, fatigue performance estimation, and other hot issues of long-life asphalt pavement, compared the structural characteristics of long-life asphalt pavement in various countries, and summarized the results of pavement material design and optimization. The research progress of the dynamic response of asphalt pavement was summarized, and the development direction of long-life asphalt pavement was discussed. The comprehensive analysis shows that long-life asphalt pavement is the development trend of …

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Application Of Digital Image Processing In Cracks Of Concrete Pavement, Gao Fan, He Chunguang, Wang Pengzhang, Qin Yanping, Duo Huaqiong Mar 2023

Application Of Digital Image Processing In Cracks Of Concrete Pavement, Gao Fan, He Chunguang, Wang Pengzhang, Qin Yanping, Duo Huaqiong

Journal of China & Foreign Highway

The image obtained by using the traditional crack detection method of concrete pavement has some problems, such as low contrast and high noise, which makes it difficult to meet the requirements of modern road engineering management or non-destructive testing. In order to eliminate the interference in crack images, digital image processing technology was used to improve the image quality through computers. This paper took digital image processing as the core and introduced its development and application in pavement cracks. Based on the research progress and achievements of digital image processing on pavement cracks in recent years, the principles and characteristics …

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Study On Modulus Characteristics Of Semi‐Flexible Pavement, Cai Yubin, Gong Minghui, Xiong Zijia, Deng Cheng, Peng Gang, Zhang Lihua, Hong Jinxiang Mar 2023

Study On Modulus Characteristics Of Semi‐Flexible Pavement, Cai Yubin, Gong Minghui, Xiong Zijia, Deng Cheng, Peng Gang, Zhang Lihua, Hong Jinxiang

Journal of China & Foreign Highway

Semi-flexible pavement has the advantages of good bearing capacity and strong shear deformation resistance and is an effective means to solve the rutting disease of intersections, bus stops, and other sections. However, due to the difference in mechanical properties, semi-flexible pavement can not completely refer to the design method of cement concrete pavement or asphalt concrete pavement, and one of the important tasks of establishing a design system suitable for semi-flexible pavement is to analyze the material modulus characteristics of pavement. In this paper, the dynamic modulus, indirect tensile stiffness modulus, and rebound modulus of laboratory forming and coring specimens …

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Analysis And Evaluation Of Application Effect Of Hot Mix Plan Regeneration Technology In Asphalt Pavement, Yang Yanhai, Cui Hong, Yang Ye, Qian Baitong Mar 2023

Analysis And Evaluation Of Application Effect Of Hot Mix Plan Regeneration Technology In Asphalt Pavement, Yang Yanhai, Cui Hong, Yang Ye, Qian Baitong

Journal of China & Foreign Highway

In order to evaluate the practical application effect of plant-mixing hot regeneration technology, this paper, based on the actual project of plant-mixing hot regeneration technology in Liaoning Province, analyzed the use status, technical performance, and construction technology of pavement materials made by plant-mixing hot regeneration technology via measuring the volume index, asphalt content, grading composition, and strength of pavement core samples. The results show that the strength characteristics, high temperature stability, and low temperature crack resistance of the pavement materials made by plant-mixing hot regeneration technology can meet the normal use requirements of asphalt pavement under moderate traffic volume. The …

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Research On Bridge Technical Condition Evaluation System Based On Bim, Xia Zili, Jing Qiang, Gao Wenbo, Huang Liguan, Wu Xiaodong Mar 2023

Research On Bridge Technical Condition Evaluation System Based On Bim, Xia Zili, Jing Qiang, Gao Wenbo, Huang Liguan, Wu Xiaodong

Journal of China & Foreign Highway

There are some practical difficulties in bridge technical condition assessment, such as low visualization degree, strong subjectivity of assessment, low efficiency of disease location, and poor continuity of assessment data. In view of the requirements of bridge technical condition assessment and the above-mentioned problems, this paper reviewed the standard system of bridge technical condition assessment in China and the application of BIM in bridge operation and maintenance, analyzed the modelling points and assessment business processes of bridge BIM model, and designed the overall framework and business module functions of the BIM-based technical condition assessment system. The bridge technical condition assessment …

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Study On Reliability Of Special Shaped Arch Bridge With Spatial Three‐Cable‐Plane Inclined Suspenders Under Live Load, Zhu Liming, Shen Kun, Wang Xingyun Mar 2023

Study On Reliability Of Special Shaped Arch Bridge With Spatial Three‐Cable‐Plane Inclined Suspenders Under Live Load, Zhu Liming, Shen Kun, Wang Xingyun

Journal of China & Foreign Highway

Because the structure of a special shaped arch bridge is complicated, there are few studies on the fatigue reliability of its suspender. In order to study the fatigue reliability of the suspender of complex shaped arch bridges under live load, the actual project of a 157 m through-type steel arch bridge with three-cable-plane inclined suspenders with special shaped tie bars was studied. The fatigue reliability formula based on Weibull distribution was applied to analyze the fatigue reliability of the suspender under different live load conditions. The results show that the design live load ensures a higher safety reserve and meets …

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Study On Pavement Structure Performance Based On Polymer Alloy Material For Steel Deck Pavement, Yang Bo, He Zhaoyi, Liu Pan, Li Kai, Sheng Xingyue, Li Lu Mar 2023

Study On Pavement Structure Performance Based On Polymer Alloy Material For Steel Deck Pavement, Yang Bo, He Zhaoyi, Liu Pan, Li Kai, Sheng Xingyue, Li Lu

Journal of China & Foreign Highway

Based on the characteristics of light weight and high strength of polymer alloy materials, three new steel bridge deck pavement structures based on polymer alloy materials were proposed in this paper. Their high temperature performance, interface bonding performance, fatigue resistance, and skid resistance were investigated, and the performance performance was compared with that of traditional pavement structures. The test results show that the thickness of the pavement layer has a greater influence on the high temperature performance of “polymer alloy material + high-elasticity modified asphalt concrete SMA10” but has less influence on the high temperature performance of “polymer alloy material …

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Comparative Study On Steel Bridge Maintenance And Technical Specifications Of China And The United States, Yang Yi, Li Chenghuan, Liu Duo, Zhang Jiandong Mar 2023

Comparative Study On Steel Bridge Maintenance And Technical Specifications Of China And The United States, Yang Yi, Li Chenghuan, Liu Duo, Zhang Jiandong

Journal of China & Foreign Highway

By systematically investigating the relevant codes of bridge maintenance in China and the United States, this paper compared the relevant regulations of steel bridge maintenance from the three aspects of steel bridge inspection, damage assessment, and maintenance and reinforcement and summarized the reference points of the existing maintenance codes for steel bridges, which has important reference value for improving the technical standards of steel bridge maintenance and enhancing the technical level of maintenance.

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Influence Of Curvature Radius On Mechanical Properties Of Small And Medium Span Continuous Rigid Frame Bridge During Construction Stages, Xie Yangfu, Ye Yuansheng, Gui Shuirong, Yang Yu Mar 2023

Influence Of Curvature Radius On Mechanical Properties Of Small And Medium Span Continuous Rigid Frame Bridge During Construction Stages, Xie Yangfu, Ye Yuansheng, Gui Shuirong, Yang Yu

Journal of China & Foreign Highway

In order to study the mechanical properties and the influence of curvature radius on the mechanical properties of curved rigid frame bridge constructed by span-by-span assembly method, this paper took the continuous rigid frame bridge with a two-box standard section (35 + 35 + 35) m of Hongdu Overpass in Nanchang City as the engineering background. By changing the curvature radius, the influence of curvature radius on the mechanical properties of small- and medium-span continuous rigid frame bridges constructed by span-by-span assembly method during construction was studied. The results show that the mechanical properties such as the main beam stress, …

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Research On Monitoring And Control Of Demolition Construction Of Prestressed Concrete Continuous Beam Bridge, Bai Yinghua, Tang Xu Mar 2023

Research On Monitoring And Control Of Demolition Construction Of Prestressed Concrete Continuous Beam Bridge, Bai Yinghua, Tang Xu

Journal of China & Foreign Highway

The demolition of an old bridge is a complex dynamic process. In order to ensure the safety of the structure in the process of bridge demolition and ensure the smooth and safe demolition of the old bridge, this paper took the demolition construction of a three-span prestressed concrete continuous beam bridge as an example, established the space model of the whole bridge through the finite element simulation modeling software Midas Civil, and calculated the stress and deformation of the structure at each construction stage. At the same time, the stress and linear changes of the main beam at each construction …

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Analysis On Local Relative Deformation Of Vertical And Horizontal Split Block Section Of Ultra Wide Steel Box‐Girder, Liu Li, Peng Chengming, Luo Hang Mar 2023

Analysis On Local Relative Deformation Of Vertical And Horizontal Split Block Section Of Ultra Wide Steel Box‐Girder, Liu Li, Peng Chengming, Luo Hang

Journal of China & Foreign Highway

In order to meet the requirement that the channel should not be occupied during the construction of the 4th Bridge over the Panama Canal, an innovative construction scheme was proposed for the erection of the ultra-wide overweight steel box girder with central double cable planes (standard section length of 13 m, width of 51 m, and weight of about 370 t), or in other words, the steel box girder was divided into two horizontal segments after vertical segmentation and then horizontally lifted onto the bridge deck through the cable tower. The steel box girder was moved to the bridge deck …

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Design And Experimental Study On Special Spherical Support Of Pingtang Bridge, Tang Zhi, Ma Baihu, Du Bin, Xu Xiangdong, Xia Junyong Mar 2023

Design And Experimental Study On Special Spherical Support Of Pingtang Bridge, Tang Zhi, Ma Baihu, Du Bin, Xu Xiangdong, Xia Junyong

Journal of China & Foreign Highway

The vertical bearing capacity of the 16# pier of Pingtang Bridge is 10 000 kN, and the horizontal bearing capacity along the bridge is 12 000 kN, which is 120% of the vertical bearing capacity. The support angle needs to reach the technical parameter requirements of 0.05 rad, which far exceeds the requirements of 10–40% horizontal force of conventional highway supports. According to the specific engineering situation, a new type of support with a large horizontal bearing capacity was designed. Firstly, the finite element model of the support was established to analyze the mechanical properties of the support, and the …

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Study On Practical Method Of Safety Assessment For Bridges Under Heavy‐Cargo Transportation, Jiang Xu, Wang Wanfeng, He Zhensheng, Gao Xuefeng Mar 2023

Study On Practical Method Of Safety Assessment For Bridges Under Heavy‐Cargo Transportation, Jiang Xu, Wang Wanfeng, He Zhensheng, Gao Xuefeng

Journal of China & Foreign Highway

In order to meet the requirements of the industry for the high efficiency, safety, and reliability of the traffic safety assessment of heavy-duty vehicles, this paper proposed a method that combined a real-time monitoring system with a finite element method for the traffic safety assessment of heavy-duty vehicles on bridges and verified the method through practical projects. The paper evaluated the bridge’s technical condition level before the heavy-duty vehicle passes and determined the resistance reduction factor considering the bridge’s technical condition level. The finite element analysis model of the bridge was established, and the reliability of the model was verified …

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Research On Vibration Reduction Measures Of Short‐Hole Blasting For Pile Group Foundation Of Bridge, Long Lidun, Ji Zhongyan, Li Shaofang, Zhou Xu Mar 2023

Research On Vibration Reduction Measures Of Short‐Hole Blasting For Pile Group Foundation Of Bridge, Long Lidun, Ji Zhongyan, Li Shaofang, Zhou Xu

Journal of China & Foreign Highway

In the construction of pile hole blasting of group pile foundation of bridges, due to the small clear distance between piles, the blasting vibration will have adverse effects on the wall protection of adjacent pile holes and the poured pile core concrete. Measures thus should be taken to control the seismic wave vibration velocity. In view of the inapplicability of conventional blasting vibration reduction measures such as reducing charge and setting isolation ditch in the construction of pile group foundation of the bridge, this paper proposed vibration reduction measures such as setting isolation holes and using air bags to replace …

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Installation Construction Technology Of Composite Girder Cable‐Stayed Bridge Superstructure In Deep‐Cutting Gorge, Ren Lei, Lu Liang, Dong Zhengliang Mar 2023

Installation Construction Technology Of Composite Girder Cable‐Stayed Bridge Superstructure In Deep‐Cutting Gorge, Ren Lei, Lu Liang, Dong Zhengliang

Journal of China & Foreign Highway

In view of the installation problems of superimposed beam cable-stayed bridge across the deep canyon, this paper studied the superimposed beam lifting, transport on beam, and superimposed beam installation and proposed three kinds of lifting technology with tower truss crane, beam lifting door crane, and large tower crane, as well as two kinds of installation technology including piecemeal assembly by full rotating deck crane and whole segment assembly truss deck crane. It also made a relative comparative analysis, solving the difficulty in vertical lifting on such bridges and providing a reference for the construction of the same type of cable-stayed …

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Research And Analysis On Controlled Blasting Demolition Of Continuous Thin‐Walled Box Ribbed Arch Bridge, Ma Shaojun, Chen Huibin, Chai Wendong, Zhang Chunquan, Wang Yuan Mar 2023

Research And Analysis On Controlled Blasting Demolition Of Continuous Thin‐Walled Box Ribbed Arch Bridge, Ma Shaojun, Chen Huibin, Chai Wendong, Zhang Chunquan, Wang Yuan

Journal of China & Foreign Highway

The 1st bridge of the Jialing River in Pengan County is erected over the Jialing River, a tributary of the Yangtze River. Due to earthquakes and perennial high load operation, the overall technical condition is “Class Ⅴ”, which cannot meet the requirements of the design load grade. This bridge is the longest highway bridge dismantled in Sichuan Province. Its structure is a multi-span continuous thin-walled box ribbed arch bridge. In addition, there are obvious diseases, so the demolition is difficult, and the safety risk is great. For the demolition of the bridge by controlled blasting, numerical simulation, shaped charge cutting …

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Analysis Of Influence Parameters Of Steel Corrugated Plate‐Concrete Composite Arch Culvert, Zhang Haijun Mar 2023

Analysis Of Influence Parameters Of Steel Corrugated Plate‐Concrete Composite Arch Culvert, Zhang Haijun

Journal of China & Foreign Highway

In order to explore the parameter effect of a composite arch culvert with corrugated steel plate and concrete, based on the engineering background of a composite arch culvert, the influence rules of four parameters, namely fill height, pipe diameter, wall thickness, and uneven settlement, on the stress and deformation of the arch culvert were analyzed based on the control variable method. The results show that the deformation and stress of the arch culvert are positively correlated with the fill height h and pipe diameter R. When h < 25 m, the deformation and stress increase linearly with the increase in the fill height, and when h > 25 m, the deformation and stress increase in a curve form. When R …

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Research On Reasonable Completion State And Construction Stage Of Fenghuang Road Bridge, Chen Qiang, Gao Libao, Du Hongliang Mar 2023

Research On Reasonable Completion State And Construction Stage Of Fenghuang Road Bridge, Chen Qiang, Gao Libao, Du Hongliang

Journal of China & Foreign Highway

In order to study the reasonable completion state of Fenghuang Road Bridge and analyze the construction stage, the finite element model was first established by Midas/Civil, and the correlation matrix was extracted. The minimum strain energy of Fenghuang Road Bridge was used as the objective function, and the mathematical optimization model was established by Matlab to determine the reasonable completion state and construction sequence of the bridge. To ensure reasonable cable force of the bridge, the construction cable force was solved by the forward assembly iteration, and the law of the construction cable force was basically the same as that …

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Research On Damage Location Based On Time Reversal And Ultrasound‐Probability Imaging Algorithm, Yin Xinfeng, Yang Jinyi, Zhang Ming Mar 2023

Research On Damage Location Based On Time Reversal And Ultrasound‐Probability Imaging Algorithm, Yin Xinfeng, Yang Jinyi, Zhang Ming

Journal of China & Foreign Highway

In order to study the location of structural damage, an improved time-reversal (TR)-based ultrasound-probabilistic imaging (TRPDI) algorithm was proposed in this paper. The electrical signal was applied to the piezoelectric ceramics (PZT) attached to the surface of the aluminium plate to generate an ultrasonic Lamb wave with good propagation performance in the aluminium plate. Based on Lamb wave theory and TR theory, the damage index was optimized, and the damage imaging algorithm was used to analyze the damage degree of the specimen and locate the damage. Three different data processing methods were used to obtain the active components in the …

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