bluuebunny/crossref_metadata_2025_split huggingface dataset:
Static load test of RC T-beam bridge flexural strengthening with externally bonded steel plates
Authors: Zheng Xilong , Du Hao , Zhang Runbo , Ma Qinglin , Gao Hongshuai 
Published: June 2021

Abstract
Externally bonding steel plates is a common method for strengthening old bridges. Structural features and diseases of T-beam bridge are described. The strengthening project of Erdao River Bridge was taken as an example. Based on static load test, changes of deflection and stress are studied at the bottom of RC T-beams strengthened by externally bonding steel plates in the loading process. Numerical simulation is also carried out. The results of static test show that bearing capacity, bending stiffness and deformation can be improved of T-beams strengthened with bonding steel plates. This paper provides good engineering practice experience for the reasonable application of bridge with externally bonding steel plate strengthening method.
Research on the Operation Mode of Infrastructure Projects Based on “REITs+PPP”
Authors: Jin Yu , Xu Ren 
Published: June 2021

Abstract
Based on the complex international situation and the continued impact of the epidemic, infrastructure investment has become an important means to promote domestic economic recovery, combined with infrastructure public offering REITs policy documents, constructing an operation mode combining “REITs+PPP”, analyzing the operation process and applicable project scope of the operation model, Finally, the main problems existing in the model are explained and corresponding solutions are proposed.
Effect of curing method on compressive strength of rapid hardening sulphoaluminate cement mortar at -10 °C
Authors: Wang Zhihang , Bai Erlei , Wang Han , Meng Xin , Luo Xin , Huang He 
Published: June 2021

Abstract
Rapid hardening sulphoaluminate cement has been widely studied and applied under low temperature, normal temperature and high temperature conditions, but the research under negative temperature conditions has just started. Through three curing methods: constant negative temperature curing, negative temperature changing positive temperature curing, and pre-curing, the influence of different curing methods on the compressive strength of rapid hardening sulphoaluminate cement mortar at -10 °C is discussed. The results show that pre-curing measures can significantly improve the early compressive strength of rapid hardening sulphoaluminate cement mortar. The longer the pre-curing time, the greater the compressive strength. Under the condition of -10 °C, the rapid hardening sulphoaluminate cement can still be continuously hydrated, and the hydration products remain unchanged.
Analysis of Influence on the Super-Large-Diameter Shield Tunnel by Stockpile Unloading
Authors: Wang Sheng , You Guangming , Liu Nian , Zhang Yazhou , Yu Chunlong 
Published: June 2021

Abstract
As the super-large-diameter shield tunnel sprouts up, there will be more and more constructions adjacent to the super-large-diameter shield tunnel. As the newly-built structure changes the existing stress field, it will inevitably deform the super-large-diameter shield tunnel and bring hazard. Based on the soil stockpile adjacent to Ying Bin San Lu shield tunnel in the flight area of Shanghai Hongqiao Airport, the digital model was established by PLAXIS finite element analysis software to analyze the influence on the super-large-diameter shield tunnel by the soft soil area and different stockpile unloading time sequence. According to the findings, it’s recommended to carry out massive stockpile unloading adjacent to the shield tunnel in section and in layer and conduct unloading first when far from the tunnel, thereby minimizing influence on the shield tunnel.
Transportation organization design of Tangshan West Comprehensive Passenger Terminal
Authors: Sun Jingcheng 
Published: June 2021

Abstract
Tangshan West Comprehensive Passenger Terminal is an important passenger terminal of Tangshan West Railway Station. The purpose of this paper is to make a scientific and reasonable transportation organization design for Tangshan West Comprehensive Passenger Terminal Station, in order to improve the passenger travel service capacity of Tangshan West Comprehensive Passenger Terminal Station, and provide a good travel experience for the passengers. Based on the analysis and introduction of the internal structure of Tangshan West Comprehensive Transportation Hub Station, the paper designs the traffic organization of Tangshan West Comprehensive Transportation Hub Station according to the existing design scheme. The author through to the passenger flow and traffic flow, traffic flow data of field investigation, and analyzes the passenger’s behavior characteristics, and after consulting relevant literature, calculate and determine the passenger’s travel of the law on passenger station may arrived. At the end of the article, the passenger emergency evacuation plan is proposed and the specific implementation content is designed according to the corresponding situation.
Research on Shanghai Port Logistics Based on VAR Model
Authors: Ji Weiwei 
Published: June 2021

Abstract
This article mainly analyzes how to use the vector autoregressive VAR model to study the development of Shanghai port logistics. First, the use of co-integration test to analyze the long-term co-integration relationship between Shanghai port logistics and the regional economy; Then, by constructing a vector autoregressive model of port cargo throughput and Shanghai’s GDP, construct an impulse response function to analyze the dynamic mechanism between the two; Then analyze the contribution rate between the two through variance decomposition.
A LMM-based seismic fragility analysis method for bridges
Authors: Liu Xiaolu 
Published: June 2021

Abstract
The common seismic fragility analysis methods are mainly inaccurate due to assumptions made in derivation process or time consuming because of large sample analysis. A new approach based on lognormal mixture model (LMM) is presented for seismic fragility analysis of long-span bridges, where LMM is used to calculate the structural demand distributions and the seismic fragility is obtained through cumulative distribution function. To demonstrate the feasibility of the present approach, seismic fragility analysis is carried out on a long-span suspension bridge with a main span of 1200m. The results show that the present approach has higher accuracy than the classical approach.
Research on the Development of Microcapsules and Their Potential Applications in Tibet Plateau
Authors: Wang Tingting , Li Xin , Liu Hao , Wang Shifeng 
Published: June 2021

Abstract
Microcapsule refers to some miniature containers or packages with polymer wall shells developed from natural or synthetic polymer materials. The shape is generally spherical, and the particle size is generally from a few microns to a few hundred. Microcapsule is a micro packaging technology that can wrap solids, liquids, and gases. The process of preparing microcapsules is called microencapsulation, which has the advantages of isolating the core material to reduce the influence of external environmental factors, enhancing the stability of the core material, concealing unpleasant odors, reducing the toxicity of the core material, increasing the utilization rate of the core material. With the continuous development of technology, the application prospects of microcapsules are gradually broad in the fields of food, cosmetics, medical engineering, production and construction, textiles and other fields. In this paper, firstly the development, fabrication techniques of microcapsules, and the materials forming cores and walls were reviewed. Secondly the applications of microcapsules in various areas were summarized. Because of the wide range of application scenarios, they hold great potential for the environmental applications in Tibet Plateau, such as the water treatment, nutrient regulation of the characteristic plants for Tibetan medicine.
Comparative Analysis of Civil Engineering Quantity Calculation Based on Glodon GTJ and Revit
Authors: Hongyan Wang , Wen Wen 
Published: June 2021

Abstract
Diversified BIM software have been generated in recent years with the high-speed economic development and fast progress of computer technology in China. BIM technologies have been widely applied in construction engineering, e.g., the calculation of engineering quantities, where the modeling method and data importing method in 3D graphics quantity calculation software have been mainly used. In this study, the technical features of Glodon GTJ and Revit software as well as the possible errors of the two software in the engineering quantity calculation were analyzed. Taking the civil engineering of Ganglin C-01 Phase II high-standard plant as an example, the two software were used for the civil engineering modeling, the concrete engineering were calculated, the reasons for the errors in the engineering quantities were analyzed according to the calculation results, and through the extensive analysis and calculation, it was finally obtained that the errors were not only related to the limitations of two software but more correlated with the professional quality of technical personnel.
Research status of new reinforced concrete box structure
Authors: Zhang Xiaomeng , Wang Qiaji , Ren Qingying , Liu Wenting , Ding Weilun 
Published: June 2021

Abstract
This paper presents a new type of prefabricated concrete structure system and the corresponding shear wall structure. The development status of the new shear wall system in various countries is described, and the advantages and disadvantages of the new shear wall as well as the research status are analyzed.
Influence of microcapsules on rheological properties of asphalt mortar
Authors: Guo Zhaotu , Fang Xiangzheng , Hu Yonglin , Si Botong 
Published: June 2021

Abstract
In order to study the effect of microcapsules on the rheological properties of asphalt mortar, microcapsules were prepared by interfacial polymerization and mixed with 70# matrix asphalt and SBS modified asphalt in different proportions to prepare two kinds of microcapsule asphalt mortars. The rheological properties of asphalt mortar were measured by dynamic shear rheological experiment and curved beam rheological experiment. The test results show that the microcapsules prepared by the interfacial polymerization method have a smooth surface, a high coating rate, and an average particle size of about 14.3μm; in the high temperature rheological properties, the rutting factor of the two asphalt mortars showed varying degrees of reduction with the increase of the microcapsule content. When the content of microcapsules is greater than 0.6%, the high temperature rheological properties of the microcapsule asphalt mortar do not change significantly; in the low temperature rheological properties, the creep stiffness modulus S gradually decreases with the increase of the microcapsule content, and the creep rate m gradually increases with the increase of the microcapsule content.
Evaluation of risk for construction safety of fabricated buildings based on analytic hierarchy process
Authors: Feiyu Cheng , Yisheng Liu 
Published: June 2021

Abstract
In order to assist the construction safety risk control of fabricated building, 17 safety risk factors were identified from the five dimensions of man, machine, material, management, and environment. The safety risk evaluation index system of the fabricated building construction stage is constructed based on the AHP (Analytic Hierarchy Process). The risk level is divided according to weight. The results show that the focus should be on the on-site safety staffing, the professional ability of the operators, the quality of additional tools, and the overhaul and maintenance of mechanical equipment. Enough attention should be paid to material storage and maintenance, operator safety awareness, deployment of safety protection measures, transportation protection measures, operator protection work, mechanical equipment selection, natural environment, safety inspection work plan, prefabricated component production quality, mechanical equipment installation, and removal. General attention should be paid to the surrounding environment, the safety production responsibility system, and the construction site environment.
Demand Analysis of Emergency Rescue Engineering Machinery Based on AHP and QFD
Authors: Jiao JingYi 
Published: June 2021

Abstract
Aiming at the problem of emergency rescue engineering machinery and equipment demand analysis, the demand analysis method based on AHP and QFD is used to establish an index system. Through the analysis of the AHP method and the construction of the house of quality method, the mapping relationship between user needs and equipment performance requirements is completed. It better solves the processing relationship from user needs to equipment performance requirements, and provides a reference for the system design of rescue engineering machinery.
A study on characteristics of flow field around vehicle body
Authors: Zhao Ruochen , Liu Zhen , Liu Yinzhen , Luo Xiaobo , Sun Yanan 
Published: June 2021

Abstract
A numerical simulation calculation is performed using large eddy simulation method to investigate the characteristics of flow field around vehicle body, analyze the change rules of the velocity and pressure of the three-dimensional flow field around the vehicle body, as well as the frequency domain characteristics of the aerodynamic coefficients in the vehicle body. The results reveal that with the gradually expanding distance from the rear of the vehicle body, the velocity in the flow field around the vehicle body gradually recovers and reaches the incoming flow velocity at 0.9m from the rear of the vehicle body. Within the range of 0∼50HZ, the resistance coefficient and lift coefficient undergo a peak attenuation to about 20%, with a fluctuation of aerodynamic coefficient mainly within the range of 0∼500HZ. The research results are of certain significance and value for analyzing and applying the characteristics of flow field around vehicle body.
Analysis of the influence of erection of scissor braces on the bearing capacity of the wheel-buckled steel pipe supporting formwork system
Authors: Jia Shilong , Meng Xiangrui , Chen Zhongliang , Zhao Lei , Su Yanming , Li Hang 
Published: June 2021

Abstract
The supporting formwork system as one of the most commonly used temporary structures in the process of building construction, its safety accidents frequently occur. The wheel-buckled steel pipe supporting formwork system is a new type of system developed under this background, and scissor brace as a kind of component in the system, have played an important role in improving the bearing capacity of the system. This paper uses ABAQUS finite element analysis software to establish an accurate simulation model of the foundational frame, and on the basis of this model, explores the influence of different erection methods of vertical and horizontal scissor braces on the overall bearing capacity of the frame. When erecting vertical scissor braces to reinforce the foundational frame, priority should be given to erect on the outer facades around the frame, and secondly consider satisfying the arrangement on the three facades. In the process of erecting horizontal scissor brace, the priority of the erected horizontal layer should be considered, that is the sub-bottom horizontal layer, sweeping rod horizontal layer, middle horizontal layer, sub-top horizontal layer, top horizontal layer.
Performance-based Rapid Evaluation Method for Post-earthquake Traffic Capacity of Bridge System
Authors: Li Zihao , Ren Leping , Yuan Haoyun 
Published: June 2021

Abstract
As the key node of highway transportation line, bridges are easy to be damaged under earthquake. When bridge earthquake damage occurs, traffic will often be interrupted, resulting in traffic network paralysis in disaster areas, seriously affecting the development of post-earthquake rescue work, thereby further aggravating the loss of personnel and property. In this paper, a performance-based method for evaluating the post-earthquake capacity of bridge system is proposed, and the post-earthquake operational status of the bridge system is evaluated. The results show that the performance-based assessment of bridge capacity after earthquake is of great value in evaluating the operation status of bridge system and making operational management decisions. Based on the fragility analysis of bridge components, the I-PCM method can be used to quickly establish the fragility curve of bridge system; meanwhile, combined with the performance-based evaluation model of seismic damage bridge capacity, the rapid evaluation of bridge capacity after earthquake is completed.
Research on the Efficiency of Beijing Tianjin Hebei Logistics Industry Based on Three Stage DEA Model
Authors: Zhang Jie , Li Yanxia 
Published: June 2021

Abstract
In order to explore the impact of external environmental factors on the efficiency of logistics industry in Beijing Tianjin Hebei region, this paper uses Three-stage DEA method to study the efficiency of logistics industry in Beijing Tianjin Hebei region from 2013 to 2017. The results show that the overall logistics efficiency of Beijing Tianjin Hebei region is in a good state, but it does not reach the optimal state. After the adjustment, the pure technical efficiency and scale efficiency have obvious changes, which indicates that the external environmental factors such as the consumption level of residents, the total amount of telecommunications business and the total retail sales of regional social consumer goods have a significant impact on the efficiency of the logistics industry, Relevant departments can put resources in a targeted way to promote the efficiency of Beijing Tianjin Hebei logistics industry.
Analysis on the structure of port collection and distribution in China
Authors: Xu Dongyuanfang 
Published: June 2021

Abstract
On October 29, 2015, Xi Jinping’s speech at the Second Plenary Session of the Fifth Plenary Session of the Eighteenth Central Committee of the Communist Party of China clearly put forward the development concept of innovation, coordination, green, openness and sharing. The new development concept conforms to my country’s national conditions and conforms to the requirements of the times. In the development of the port and shipping industry, green shipping is becoming a new trend in the development of the port and shipping industry. The adjustment of the transportation structure of the port collection and distribution system is an important aspect of green shipping. The “Railway to Railway” policy aims to improve the comprehensive transportation network through government intervention and market guidance. By optimizing the transportation structure, reducing road transportation and increasing railway transportation, more goods are transferred from road transportation to railway, thereby promoting the adjustment of transportation structure, to achieve the goal of green sustainable development and a strong transportation country. Promoting the implementation of the “Railway Transfer” policy is actually related to the implementation of the structural reforms on the supply side of transportation, and is an important guarantee for the sustained and healthy development of my country’s economy.
The Current Situation and Development Suggestion of Highway Instrument and Equipment Measurement Management
Authors: Lu Liu , Heng Qiao , Guangwu Dou 
Published: June 2021

Abstract
The application of automation and intelligent technology in highway instrumentation equipment has gradually become the main factor that affects highway engineering test results. This article summarizes the characteristics of highway instrument and equipment measurement, and analyzes the main problems existing in the current highway professional measurement work from two aspects: measurement service and measurement submission. Suggestions for the development of highway professional metrology in response to the above problems. These suggestions include improving the legal system, exerting the strength of industry technical organizations, striving for more measurement authorizations, improving technical levels, and strengthening talent training.
Research and Application of a New Encryption Transmission Technology of Internet of Things Based on PLC Power Line Carrier Communication
Authors: Lingzhi Pan , Yizhu Zhang , Di Zhao , Jianguang Wang , Limin Deng , Lingwen Sun 
Published: June 2021

Abstract
Information transmission is an important part of the Internet of things. At present, the different devices produced by IOT (Internet of things) manufacturers give rise to the various connection modes, such as infrared, Wi-Fi, network cable, Bluetooth, ZigBee, VB IOT, Lora and LTE, making the market in chaos. In view of the above situation, this paper proposed a new way of IOT communication by using PLC power line carrier for encrypted transmission. It covered the IOT network to all power supply terminals by using wires in the unit of the area. In this way, the IOT devices can be powered, solving the problem of the last kilometer of network signal transmission.
Discussion on the Citation of Accelerator Standards and Testing Methods
Authors: Xiaolong Chen , Zhenxing Li , Benqing Gu , Zhitang Li , Zeqin Li , Kaihong Zhong 
Published: June 2021

Abstract
As several standards are available for the accelerator test, the influence of different standards on accelerator test result was studied. Results showed that cement components and cement type had a significant effect on the accelerator test results. In addition, the impact of different batches of benchmark cement and w/c ratio on accelerator test results was investigated. Moreover, reasons of benchmark cement affected the test results of accelerator was analyzed. Standards for accelerator testing and principles of selection of standards were also discussed in this paper.
Research on the Measurement of Muzzle Shock Wave Pressure Field for a Naval Gun
Authors: Qiankun Chen , Panfei Li , Qi Zhou , Xuefeng Wang , Meng Li 
Published: June 2021

Abstract
The shock wave test of naval gun is of great significance to the safety of the appraisers and the impact on other equipment and parts around the muzzle. In order to test the size and distribution of the muzzle shock wave of a naval gun, a set of shock wave testing system is built, and the test of ammunition under high or low temperature is carried out. On this basis, three interpolation methods of equal pressure surface are analyzed. Finally, we adopt the B-spline method to draw the isobaric field surface and isobaric curve of muzzle shock wave. The results show that the maximum pressure appears at 1 m behind the muzzle, and then the shock wave pressure decreases rapidly, and the attenuation velocity of the shock wave behind the muzzle is significantly greater than that in front of the muzzle; The isobaric line density near the muzzle is higher than that in other areas, conforming to the distribution characteristics of shock wave, and verifying the correctness of the test method; When launching ammunition with high temperature, the density of isobars near the muzzle is much higher than that of low temperature ammunition. The distribution of isobars can provide reference for evaluating the impact of shock wave on other equipment and parts around the muzzle.