Deep Learning Techniques For Efficient Evaluation Of Asphalt Pavement Condition,
2023
Public Works Department, Faculty of Engineering; Ain Shams University; Cairo; Egypt
Deep Learning Techniques For Efficient Evaluation Of Asphalt Pavement Condition, Kamel Mahdy, Ahmed Zekry, Mohamed Moussa, Ahmed Mohamed, Hassan Mahdy, Mohamed Elhabiby
Mansoura Engineering Journal
For the last few decades, researchers have been devising a simple and cost-effective method to evaluate pavement distresses to give decision-makers adequate feedbacks about the pavement condition of a certain road. Fortunately, with the evolution and progression of computer vision tools and techniques, good results had been achieved regarding the detection, classification, and quantification of road distress. In this paper, a new efficient process of road distress analysis using deep learning models is introduced. This new process was tested on a collected road dataset to evaluate the efficiency and speed of this low-cost road maintenance system. Promising results were obtained …
Skills Matter – Up-Skilling Across Construction Stakeholders For Emerging Roles,
2023
Solas
Skills Matter – Up-Skilling Across Construction Stakeholders For Emerging Roles, Avril Behan, Paul Mccormack, Barry Mcauley
Conference Papers
The EU’s Climate Target Plan To 2030 (European Union 2020b) of achieving at least 55% reduction in Green House Gas emissions from 1990 levels, delivering towards a climate-neutral economy by 2050, requires systems-level change in the way we design, construct, and operate our built assets. Funding initiatives, such as co-ordinated by BUILD UP Skills, aim to deliver upskilling to the market but targets set by the European Skills Agenda may not be reached at current achievement levels. This paper presents the results of one completed and the progress of one ongoing Horizon 2020 funded project, BIMcert and ARISE, respectively. Learning …
An Occupant-Centric Energy Modeling And Simulation In Office Buildings,
2023
Louisiana State University and Agricultural and Mechanical College
An Occupant-Centric Energy Modeling And Simulation In Office Buildings, Seddigheh Norouziasl
LSU Doctoral Dissertations
Building energy use is highly sensitive to occupants’ energy-related behaviors, including their presence and interaction with different building systems. Modeling and simulation of occupants’ energy-related behavior play an essential role in accurately predicting building energy consumption. Simplifying occupancy parameters in building performance simulation tools can lead to discrepancies between the simulated and actual building energy performance. The main goal of this research is to simulate the occupants’ energy-related behavior in office buildings and utilize the occupancy data to accurately predict building energy performance. Our objective is to increase building energy efficiency and reduce energy consumption while ensuring occupants' comfort, especially …
Analyzing The Labor Shortage In The Construction Industry And The Best Practices To Increase Worker Satisfaction,
2023
California Polytechnic State University, San Luis Obispo
Analyzing The Labor Shortage In The Construction Industry And The Best Practices To Increase Worker Satisfaction, Cade Batchman
Construction Management
The construction industry is facing a significant labor shortage, which has far-reaching implications for the industry and the economy. This paper explores the causes of the shortage and the practices being implemented to address it. Economic changes, technological advancements, union/open shop dynamics, educational shifts, and the industry's image all contribute to the shortage. The economic rebound from the 1980s recession and the lack of new entrants into the field have created a demand-supply gap. Additionally, slow adoption of technology and the perception of construction work as physically demanding and risky have deterred potential workers. The decline in union membership has …
The Extent Of Drone Education Being Taught In Asc Schools To 4-Year Construction Students,
2023
Clemson University
The Extent Of Drone Education Being Taught In Asc Schools To 4-Year Construction Students, Cheran Teja Dumpati
All Theses
The technology of Unmanned Aircraft Systems (UAS) is growing rapidly in many fields and has become one of the skills in demand in the industry. Universities are one of the primary sources of teaching drone technology with a career-oriented approach. The goal of this study is to investigate the content of the drone curriculum being taught in Associated Schools of Construction (ASC) schools. This includes the topics covered, practical training offered, and the key deliverables taught. This information serves as a foundation for the schools that are looking forward to start drone courses in their department. The research found that …
Correlation Analysis Between External Damages And Transverse Load Distribution Capacit Y Of Hollow Slab Bridges,
2023
1. Anhui Communications Holding Group Co., Ltd., Hefei, Anhui 230088, China;
Correlation Analysis Between External Damages And Transverse Load Distribution Capacit Y Of Hollow Slab Bridges, Cao Hao, Sun Dunhua, Wang Zichen, Zhao Fuli, Sun Haipeng, Xiong Wen
Journal of China & Foreign Highway
To correctly evaluate the service status of prefabricated hollow slab girder bridge, based on the measured data of apparent disease and load test of hollow slab girder bridge in reconstruction and expansion project, this paper first analyzed the data characteristics of the beam body, hinge joints, and support disease samples and obtained their statistical distribution rules. Then, according to the typical diseases (transverse cracks and hinge cracks at the bottom of the beam), the BP neural network was used to build a correlation model for them, and the close correlation between the two typical diseases of hollow slab girder bridge …
Research Of Disease Analysis And Reinforcement Technology For Typical Orthotropic Bridge Deck,
2023
1. State Key Laboratory of Health and Safety of Bridge Structures, Wuhan, Hubei 430034, China; 2. China Railway Bridge Research Institute Co., Ltd., Wuhan, Hubei 430034, China
Research Of Disease Analysis And Reinforcement Technology For Typical Orthotropic Bridge Deck, Guo Fukuan, Zhou Shangmeng
Journal of China & Foreign Highway
In order to effectively solve the disease problem of orthotropic steel bridge decks, this paper relied on a steel box girder cable-stayed bridge deck reinforcement project to carry out steel bridge deck disease analysis and reinforcement technology research. The results show that the main disease of steel bridge decks is fatigue cracking. The fatigue cracks are numerous, short, and deep, and they continuously grow and cause more severe disease. The excessive fatigue stress amplitude is the main factor leading to the fatigue cracking of steel bridge decks. Once the crack occurs, the stress amplitude of the crack tip increases continuously, …
Review Of Research Progress Of Frame Beam Anchore D Structure In Slope Supporting,
2023
School of Transportation Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China
Review Of Research Progress Of Frame Beam Anchore D Structure In Slope Supporting, Zhang Junhui, Zhou Qinwei, Li Feng, Zhang Shiping
Journal of China & Foreign Highway
This paper summarized the research status of frame beam anchored structures in slope supporting and reinforcement engineering in China and abroad. It analyzed the results of structural design, model test, and field construction. Through induction and analysis, it is found that the current design of frame beam anchored structure has certain limitations, and it is necessary to form a universal design theory and method. The model test of frame beam anchored structure in slope supporting is limited by the test equipment and conditions and fails to be carried out on a large scale. The key points and standards of the …
Experimental Study On Interface Fatigue C Haracteristics Of Asphalt P Avement Pothole Patch Under External Factors,
2023
1. School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China; 2. Sichuan Key Laboratory of Road Engineering, Chengdu, Sichuan 610031, China;
Experimental Study On Interface Fatigue C Haracteristics Of Asphalt P Avement Pothole Patch Under External Factors, Ai Changfa, Shao Zhutao, Huang Yangquan, Ren Dongya
Journal of China & Foreign Highway
After the asphalt pavement patch for potholes is put into use, the interface joints around it are prone to fatigue and durability problems under the action of external factors such as the natural environment and driving load effect. In order to analyze the fatigue characteristics of the repaired interface joints under the action of external factors, the four-point bending fatigue test and pull-out test, combined with the results of orthogonal analysis, were used to determine the best bonding scheme of the repaired interface. The influence of external factors such as temperature, frequency, and strain level on the fatigue life of …
Case Study Of Steel Wire Corrosion In Hoist Cable Of Half ⁃Through Arch Bridge,
2023
School of Civil Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China
Case Study Of Steel Wire Corrosion In Hoist Cable Of Half ⁃Through Arch Bridge, Xu Hongsheng, Jiang Lei, Yan Donghuang
Journal of China & Foreign Highway
In order to understand the causes and development rules of steel wire corrosion diseases inside the hoist cable of half⁃through and through arch bridges, this paper systematically studied the defects and loopholes of the protection system for the hoist cable of two half⁃through steel arch bridges by disintegrating the old hoist cables of Yuehai Bridge in Yinchuan and Xiangjiang Bridge in Heishipu Street in Changsha City. It probed into the distribution rules of corrosion diseases of steel wire inside the hoist cables. The main reasons leading to the difference in steel wire corrosion disease inside the old hoist cables of …
Influence Of Proximity Construction Of A New Pile Foundation On Adjacent Metro Tunnel,
2023
School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, China
Influence Of Proximity Construction Of A New Pile Foundation On Adjacent Metro Tunnel, Jin Shengji, Mu Anxin, Bi Bo, Xu Chao, Yu He
Journal of China & Foreign Highway
The construction of a bridge pile foundation and cap not only causes disturbance to its foundation and surrounding soil but also has a certain influence on adjacent existing structures. In order to study the influence of new pile foundation proximity construction on tunnels adjacent to subway sections, this paper took the pile foundation construction process of auxiliary bridge extension on both sides of Shenyang Changqing Bridge as the research object and adopted Midas/GTS finite element numerical simulation and construction monitoring methods to study the influence of new pile foundation proximity construction on tunnels adjacent to subway sections. The results show …
Research On Cyclic Accumulative Strain Characteristics Of Structured Soft Clay,
2023
1. School of Civil Engineering, Shaoxing University, Shaoxing, Zhejiang 312000, China; 2. Department of Civil Engineering, Hangzhou City University, Hangzhou, Zhejiang 310015, China
Research On Cyclic Accumulative Strain Characteristics Of Structured Soft Clay, Ding Zhi, Yu Jiangang, Sun Miaomiao, Wang Jiawei, Ye Ke
Journal of China & Foreign Highway
Due to its structural properties, natural soft clay is prone to produce large cumulative deformation under cyclic loads such as traffic, which has a great impact on engineering. In order to solve the deformation problem caused by structural failure of soft clay under dynamic action, dynamic characteristics of undisturbed soft clay near a highway in Hangzhou were tested by the dynamic triaxial device under cyclic loading, and the dynamic characteristics of saturated undisturbed soft clay under different effective consolidation confining pressures, vibration frequencies, and dynamic stress ratios under K0 (static earth pressure coefficient) consolidation conditions were studied. The results show …
Experimental Study On Time ⁃Varying Characteristics Of Saturated Water Content Of Granite Residual Soil In Acid⁃Etched Environment,
2023
1. China Communications Fourth Highway Engineering Bureau Co., Ltd., Beijing 100022, China;
Experimental Study On Time ⁃Varying Characteristics Of Saturated Water Content Of Granite Residual Soil In Acid⁃Etched Environment, Zhang Maolin, Xie Qingzhong, Fu Helin, Zhang Meng, Li Qinglong, Dong Hui
Journal of China & Foreign Highway
In order to clarify the correlation between saturated water content variability and slope stability, characteristic tests on saturated water content of granite residual soil affected by acid were carried out. Direct shear tests were carried out to test the variation rule of saturated water content and its characteristic value under the influence of vertical loading and acidification time, and the internal causes of variation were deduced based on the structural characteristics obtained by microscope electron microscopy. The results show that: ① The vertical pressure σ = 300 kPa is the turning point of the linear and nonlinear relationship, and under …
Effect Of Activator On Compressive Strength Of Steel Slag Powder Cement Soil,
2023
1. Shanxi Transportation Construction Engineering Quality Detection Center, Taiyuan, Shanxi 030000, China;
Effect Of Activator On Compressive Strength Of Steel Slag Powder Cement Soil, Chen Fei, Wang Yanchun, Du Sujun
Journal of China & Foreign Highway
In order to reasonably solve the environmental pollution caused by steel slag, steel slag powder was used to improve cement soil. The optimal mix ratio was determined by a laboratory unconfined compressive strength test to prepare steel slag powder cement soil. In view of of low activity and limited compressive strength enhancement effect of steel slag powder, three kinds of activators including sodium hydroxide, silica fume, and calcium chloride were selected to be added to steel slag powder cement soil, so as to study the strength variation rule. The results show that the strength of cement soil can be improved …
Influence Of Steel Fiber And Polymer Emulsion On Mechanical Properties And Microstructure Of Concrete,
2023
1. Zhongjiao Road and Bridge South Engineering Co., Ltd., Beijing 101121, China;
Influence Of Steel Fiber And Polymer Emulsion On Mechanical Properties And Microstructure Of Concrete, Guo Guanglei, Sun Shiqiang, Li Ying, Zheng Yiwei, Mei Yingjun
Journal of China & Foreign Highway
The microstructure and mechanical properties of concrete were improved by adding steel fiber and polymer emulsion. The working properties and mechanical properties of steel fiber concrete, polymer emulsion-modified concrete, and steel fiber polymer concrete were tested at 3 d, 28 d, and 90 d. Nitrogen adsorption test, mercury injection test, and density method were used to obtain the total pore volume, median pore size, and closed porosity of concrete. The influence of steel fiber and polymer emulsion on the microstructure and mechanical properties of concrete was analyzed. The results show that the compressive strength of concrete after adding steel fiber …
Research On Budget Quota Of Highway Bridge Crack Treatment,
2023
CCCC First Highway Consultants Co. Ltd, Xi’an, Shaanxi 710075, China
Research On Budget Quota Of Highway Bridge Crack Treatment, Chang Ding, Yu Licun
Journal of China & Foreign Highway
In view of the lack of a unified budget quota for concrete structure crack treatment, a large number of measured data and fuzzy analytic hierarchy process were used to calculate the consumption of budget quota through the amplitude difference coefficient of construction quota. According to the technical specifications of highway bridge reinforcement engineering, reasonable crack treatment methods and engineering contents were determined, and the quota of structure crack treatment was prepared by using the physical quantity. The quota cost was compared with actual engineering cases. The results show that the quota cost and the actual project cost are basically at …
Effect Of Nano ⁃Metakaolin On Frost Resistance Of Concrete,
2023
Guangdong Communication Planning & Design Institute Group Co., Ltd, Guangzhou, Guangdong 510507, China
Effect Of Nano ⁃Metakaolin On Frost Resistance Of Concrete, Li Zhenfa
Journal of China & Foreign Highway
The denudation per unit area, relative dynamic elastic modulus, mechanical strength, and fracture characteristics of concrete with different nano-metakaolin contents before and after freezing and thawing were studied. The results show that nano-metakaolin can significantly improve the freezing resistance of concrete, and the denudation per unit area and relative dynamic elastic modulus loss rate of modified concrete are significantly improved compared with the reference group. The mechanical strength and fracture properties of nano-mekaolin-modified concrete before and after freezing and thawing are higher than those of the control group, and the mechanical strength, fracture toughness, and fracture energy loss rate are …
Research Progress On Properties Of Fiber Modified Asphalt Mixture,
2023
1. School of Transportation Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China; 2. National Engineering Research Center of Road Maintenance Technologies, Changsha, Hunan 410114, China
Research Progress On Properties Of Fiber Modified Asphalt Mixture, Liang Bo, Zhang Haitao, Liu Zheng, Liao Wei
Journal of China & Foreign Highway
As a kind of asphalt mixture additive and stabilizer, fiber can effectively improve the performance index of asphalt pavement and extend the service life of asphalt pavement. Based on the analysis of relevant literature in China and abroad, this paper summarized the action mechanism of fiber modified asphalt and asphalt mixture, the effect of fiber content on properties, and the characteristics of different types of fiber modified asphalt. Fiber can effectively improve the high temperature property, low temperature property, and fatigue property of asphalt mixture, especially the resistance to low temperature and fatigue cracking of asphalt mixture. The modification effect …
Optimization Design Of Uhpc ⁃Nc Continuous Box Girder Bridge Based On Response Surface Method,
2023
1. Foshan Jianying Development Co., Ltd, Foshan, Guangdong 528315, China;
Optimization Design Of Uhpc ⁃Nc Continuous Box Girder Bridge Based On Response Surface Method, Guan Weiyi, Duan Luqi
Journal of China & Foreign Highway
In order to solve the two major problems of mid-span deflection and cracking in the late stage of the long-span bridge, a UHPC-NC hybrid beam design scheme was proposed, and some design parameters were optimized based on the response surface method. By optimizing the local parameters, namely the thickness of the roof, web, and bottom plates of the mid-span section, and the overall parameters, such as the UHPC replacement ratio, the number of beam curves, and the height of the mid-span beam, the optimal parameter combination was obtained as follows: roof thickness of 22 cm, web plate thickness of 25 …
Thickness Detection Of Reinforced Concrete Protective Layer Based On Environ Mental Calibration,
2023
1. Zhejiang Scientific Research Insitute of Transport, Hangzhou, Zhejiang 311305, China; 2. Zhejiang Provincial Key Laboratory of Road and Bridge Inspection and Maintenance Technology, Hangzhou, Zhejiang 311305, China
Thickness Detection Of Reinforced Concrete Protective Layer Based On Environ Mental Calibration, Hong Hua, Xu Jianhong, Cao Sugong, Fu Junlei
Journal of China & Foreign Highway
In order to solve the problem of inaccurate detection of reinforced concrete protective layer thickness in engineering, this paper studied and formed a reasonable and perfect method and calibration procedure for the detection of reinforced concrete protective layer thickness in highway and water transportation engineering by using the analysis of influencing factors. The results show that the accuracy of measuring the protective layer thickness of reinforced concrete in practical engineering can be effectively improved. The production of standard instrument calibration specimens can be saved, and the testing process can be standardized.
