bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Power Grid Enterprises’ Investment Strategies on Incremental Power Distribution Projects in China
Authors: Wu Zechen , Yang Su , Xue Song , Hu Yuan 
Published: March 2020

Abstract
As the highlight of China’s new round of power reform, incremental power distribution reform has attract wide public attention. In order to adapt to the situation of reform, power grid enterprises need to develop investment strategies on the pilot projects, and determine the criteria for controlling, participating in or abandoning shares. This paper analyzes influencing factors for power grid enterprises’ investment decision, and build a investment-assisted decision-making model for incremental distribution reform. The investment-assisted decision-making model covers 5 dimensions of economic efficiency, project importance, development potential, government attitude, and image influence, with a total of 12 evaluation indexes. The authors also take four projects as examples for quantitative evaluation, proving the feasibility of decision-making model.
A Momentum-Based Method for the Mass Concentration Measurement of Pneumatically Conveyed Solid: Computational Verification
Authors: Liu Guanqing 
Published: March 2020

Abstract
A momentum-based method is proposed to measure the mass concentration of solids in pneumatic pipelines. The mechanism relies on the fact that particles flowing with the fluid will exert drag force and thus induce pressure increase on the fluid phase when they decelerate as approaching a static object or space in the flow domain. The pressure increase is expected to increase with the mass concentration of particles and the fluid velocity, and is also affected by the particles size and density. A conversion factor that indicates the extent to which particle momentum is converted to the fluid static pressure increase was defined. Computational verification of the mechanism was carried out with pulverized coal flow around a one-end closed tube with its opening facing towards the incoming flow. The pressure increase was quantitatively comparable to the fluid dynamic pressure when the solid-to-fluid mass ratio was of the same order of magnitude. The conversion factor was found insensitive to particle size over a wide range, which is advantageous since particle size distribution are usually not known in advance. Compared to most existing techniques, current mechanism is more robust and economic in industry field measurements.
Response characteristics of transient electromagnetic of fault structures in shallow stratum of underground space and its exploration
Authors: Zhang Pingsong , Ou Yuanchao , Hu Xiongwu , Li Shenglin 
Published: March 2020

Abstract
The key to detecting underground faults in shallow stratum of the city with transient electromagnetic method is the determination of the fault location and the characteristics of accurate underground parameters. In order to establish a field data acquisition device and method parameters suitable for the exploration of the fault structure in the shallow layer of the city, the corresponding numerical model is established based on the Shungeng mountain fault structure with shallow depth. The finite difference method is used to simulate and calculate the response characteristics of the transient electromagnetic field in the fault structure zone, which provides the basis for the field application of the method and technique. Then, based on the surface geological conditions of Dongshan section of the Shungeng mountain fault, by using the short-circuit transient electromagnetic method, field data acquisition observing system and relevant parameters suitable for transient electromagnetic prospecting of urban shallow fault structures were established through experiments on site technical conditions, and the geoelectric section. The structure and characteristics of shallow buried faults are judged and explained. The results show that the response characteristics of transient electromagnetic in the fault fracture zone are significant, and the location and structure of transient electromagnetic field can be easily distinguished. It can provide references for similar geological conditions.
Numerical simulation of consolidation settlement of the embankment of the Nansi Lake
Authors: Wang Zhenyu , Yang Lingqiang , Li Xiudi 
Published: March 2020

Abstract
The consolidation settlement of the lake embankment engineering under long-term load is very large. It makes the structure can’t work normally and even leads to severe damage. Therefore, it is very important to analyze the settlement of soft soil foundation for the stability and safety of the lake embankment. The mechanical parameters of soil in this area, based on the geological investigation report of the lake embankment, are used to analyze the engineering characteristics of lacustrine soil. The embankment of the Nansi Lake is selected as an object to analyze the consolidation deformation characteristics of the lake embankment. The consolidation settlement of the lake embankment is simulated by the finite element analysis software. The simulation data and analysis results are very important for studying local geological characteristics and hydraulic construction.
Dynamic response analysis of machine bridge of spillway gate
Authors: Wang Zhenyu , Yang Lingqiang , Sun Naidong 
Published: March 2020

Abstract
Under the action of earthquake, the seismic property of the machine bridge directly affects the normal use of spillway gate. At the same time, the type of infilled wall affects the seismic capacity of the machine bridge. To decrease the damage possibility of the machine bridge under earthquake, three finite element models are established by finite element software, and the dynamic time history analysis of the machine bridge is carried out. The stress and displacement of different models are obtained through the dynamic time history analysis. The best type of infilled wall is judged by comparing the seismic responses of three models. Based on the analysis results, the mechanical characteristics of the machine bridge under earthquake action are analyzed and the weak position of the structure is found. Therefore, some measures can be taken to further improve the seismic performance of the machine bridge. The calculation results have important significance for practical engineering.
Analysis of creep process of marine concrete
Authors: Sun Naidong , Yang Lingqiang , Liu Xiangxin 
Published: March 2020

Abstract
The use of marine concrete is increasingly common with the rapid development of marine economy. The corrosion and fracture of concrete in marine building structures are relatively serious, due to the strong corrosiveness of sodium and chlorine ions in seawater. Therefore, it is of great significance to study the creep laws of concrete in marine environment. A marine concrete pier is taken as the analysis object, and the elastic theory and concrete creep theory are combined to build a model of that. The creep curves of concrete in marine environment are obtained by using finite element method, and it can be compared with the creep curves of ordinary concrete in theoretical analysis. The results show that the stress relaxation of marine concrete is greater and the stress state is more unstable than that of ordinary concrete under the same conditions. The time for marine concrete to reach the same stress state is about 6-9 years earlier than that of concrete in normal environment. In addition, it takes a longer time for the stress state of marine concrete to tend to be stable.
Study on utilization access control mechanism of resources in geological cloud environment
Authors: Zhang Qine , Zhao Jinhui 
Published: March 2020

Abstract
In order to solve the problem in access control of open geological cloud resources, from the view of usage an access control model was proposed based on trust and role. Firstly, geological cloud resources were divided into five categories according to the actual usage of geological cloud resource, and the access control needs of various resources were analyzed in detail. Secondly, a layered access control model of geological cloud resource was designed, in which the access control process was defined and the evaluation method of user trust based on set pair analysis was given. Finally, the results and safety analysis showed the rationality and validity of proposed model.
Comparative Analysis on Artificial Freezing Design Scheme of Vertical Underground Garage
Authors: Zhang Ji-Wei , Song Zhang , Liu Shu-Jie , Hua Wang 
Published: March 2020

Abstract
Based on 7m length×7m weight×50m depth vertical underground garage of old residence communities in Shanghai China, the new article ground freezing (AGF) method— Box-frozen method was studied. The elastic theory calculation and numerical simulation showed that the thickness of straight (hq
) and bottom (hd
) frozen wall are 2.8m and 10m respectively, which can meet load bearing and water insulation requirements. Three artificial freezing design schemes and parameters were proposed according to different freezing hole layout, namely, 1) double row holes and cutting bottom holes;2) double row holes and leave bottom holes;3) single row holes and leave bottom holes. Evolution law of temperature field of different Box-frozen design schemes was checked by numerical simulation. The results showed that, during maintenance freezing period, both of double row holes and cutting bottom holes and single row holes and leave bottom holes schemes appear thaw phenomenon at bottom of frozen wall while double row holes and leave bottom holes stops thaw tendency basically. Three Schemes are compared in four aspects including construction period, cost, excavation difficulty and risks, which prove that double row holes and leave bottom holes scheme are a most suitable article ground freezing method due to less construction period and low risk.
Numerical Study of TBM Excavated Coal Mine Roadway Support Design
Authors: Tang Bin , Wang Zhenhua , Tang Yongzhi , Wang Chuanbin , Li Yanqing , Yu Yan , Dai Mai 
Published: March 2020

Abstract
In TBM excavation projects of Zhangji coal mine which is the first application of TBM at deep underground coal mine, computational modelling was conducted in surrounding rock stability study and support design of coal mine TBM excavated roadway due to lack of experience in similar projects. This paper presents a support design methodology of TBM excavated roadway at deep underground coal mine. A three-dimension finite element model was established, and the non-uniform tectonic stress filed was also been simulated in the model. Stress redistribution, displacement and plastic zone range of surrounding rock under different support patterns were analyzed and support design of the roadway was made on the base of simulation results. During roadway excavation, instrument rock bolts were installed for monitoring stress distribution and roadway convergence. The monitoring results suggest that computational simulation results correspond with in-situ monitoring data, horizontal stress concentrates on the roof and floor of roadway and vertical stress concentrates on lateral sides. The roadway convergence increased significantly after excavation and then slowed down and finally stopped after 40 days.
Improved population initialization method and its application in bridge optimization
Authors: Yang Ronghao , Zhao Yunpeng , Si Haipeng , Li Zhigang , Wang Ruizheng , Peng Kai 
Published: March 2020

Abstract
When solving bridge optimization problems by traditional genetic algorithms, a random method is often used to generate the initial population, which can’t ensure that the initial population is evenly distributed in the solution space and reasonably represents the solution space. In order to solve the shortcomings of random method, an improved population initialization method is proposed by combining random method with good point set. Based on it, aimed at the characteristic of implicit non-linear objective function or constraint function in bridge structure optimization, a BP neural network is used to simulate the relations between the objective function or constraint function and design variables. Then this paper takes a steel truss bridge as an example of optimization. Taken the allowable deflection of bridges as limit and aiming at minimizing the amount of steel, optimization model of bridge is established. Finally, the improved population initialization method is applied to solve the optimization model. The results show that the improved population initialization method can not only improve the uniformity of the population, but also be suitable for optimization design of bridges.
Optimal Sensor Arrangement for Cable-Stayed Bridge Based on Multiple Algorithms
Authors: Liang Jianjun , Peng Kai , Li Kai 
Published: March 2020

Abstract
The arrangement of sensors is one of the key points in health monitoring of long-span bridge structures. In this paper, eight algorithms are applied to the optimal sensor arrangement of a long-span cable-stayed bridge and compared. Firstly, eight algorithms and four criteria are introduced, then eight algorithms are applied to optimize the layout scheme, finally, four criteria are used to evaluate the algorithms comprehensively according to the same weight. The results show that in the optimal arrangement of sensor measuring points, it is necessary to combine the engineering practice, comprehensively consider the weight ratio of different criteria, and choose the best optimization scheme.
Analysis of Linear Influence of Long-span PC Continuous Rigid Frame Bridge during The Winter Break
Authors: Li Zhigang , Song Yifang , Zhao Yunpeng 
Published: March 2020

Abstract
In the construction of large-span PC continuous rigid frame bridges, linear changes occur during the winter. In order to study the influence of the girder linear change on the monitoring line shape of the bridge, the actual bridge under construction was selected as the research object. Based on the finite element analysis software combined with the measured deformation data of bridges, the main influencing factors of the main beam linear deformation during the winter break are analyzed. When the latest construction section of the cantilevered beam is untensioned and retains the beam-end hanging basket to enter the cantilever wintering stage, the final analysis results show that the linear deformation of the main beam during the period of the winter break is as follows. When the length of cantilevered beam is less than 13L/32, the linear deformation of the cantilevered main beam during the winter break period has a little influence on bridge alignment; when the length of the cantilevered main beam exceeds 13L/32, the girder will gradually produce the downward deflection during the winter break. In order to avoid the continuous downward deflection of the main beam during the winter, the prestressed reinforcement of the latest construction section need to be tensioned to reduce the amount of deflection of the main beam during the winter break.
Design of Drilling Turbine Generator under Coalmine Well
Authors: Zhang Jiguan , Chen Long , Gao Jun 
Published: March 2020

Abstract
Aiming at solving the problem of low endurance of detection instruments under coalmine well, a turbine generator, which relied on water drive to generate electricity in drilling, was designed based on the explosion-proof requirements of coal mine equipment. The generator structure, turbine structure, overall structure and circuit design of the turbine generator were discussed in detail. By setting up the test platform, the speed of the prototype and the driving performance of the water flow were tested. The test data shows that the prototype accords with the design goal and it can meet the requirements of underground drilling detection instrument in coal mine.
Bridge Technology Condition Degradation Prediction Based on Bayes Dynamic Model
Authors: Zhao Xiangyu , Zhang Yang 
Published: March 2020

Abstract
Establishing appropriate degradation model of bridge performance is the precondition of preventive maintenance. A Bayes dynamic model is proposed to predict the future performance of bridge. Bayes factor is used to evaluate whether the prediction mode is reasonable. The Bayes factors of Bayes dynamic models are tested through practical engineering. The results show that the Bayes dynamic model is fit for the bridge technology condition degradation prediction.
Parametric Analysis and Research on Full-range Mechanical Behavior of Curved Twin-I Girder Composite Bridges
Authors: Han Xiaodong , Song Yifan , Shen Chuandong , Gong Xiangjian , Liu Manhui 
Published: March 2020

Abstract
In order to further study the full-range mechanical behavior of the curved and small-and-medium span twin-I steel girder composite bridges, the combination of experimental verification and numerical analysis was used to study the stability safety at construction stage and ultimate strength at finished stage of the curved continuous composite beam of 35m standard span. Firstly, using the experimental data in the literature, the ABAQUS nonlinear numerical model was verified from the aspects of failure load and mid-span deflection. Secondly, the stability safety factor and the ultimate live load coefficient were used as indicators to compare and evaluate the mechanical performance of the full bridge structure with different spans and different curvature radius. The results show that the stability safety of three-span bridge improved obviously compared with the simply supported beam, but ultimate strength of bridges with different spans is similar at finished step. The stability safety and ultimate bearing capacity increased with the increase of the radius during the whole process. When the curvature radius is greater than 460m, the bearing capacity is significantly improved. According to the difference of live load coefficient of inner and outer curved girder, the design could be referred to different inner and outer girder height.
Numerical Simulation of the Influence of Cutting Slope Rate on the Stability of Highway Slope in Loess Area
Authors: Song Pei Yuan , Mao Yan Long , Huang Heng Xing 
Published: March 2020

Abstract
The highway project in the loess area of northern Shaanxi is to balance the earthwork and save costs, and a large number of excavation slopes are set. In the loess area, the soil is soft. If there is a structural surface, it is easy to cause damage to the airspace, causing huge losses to highway construction and transportation on the heavy rain and other working conditions, especially the roadside slope. Taking the high loess slope of a section of Zhidan-Nanliang Red Tourism Highway as an example, the indoor parameters are used to determine the appropriate parameters. The Midas-GTS NX strength reduction method is used to analyze the slope stability under different slope cutting rates.
Study on Underpinning Scheme of Shield Tunnel Crossing Pile Foundation of Viaduct
Authors: Zhang Liangliang , Liu Yan , Wang Yidi 
Published: March 2020

Abstract
With the increasingly dense distribution of urban metro network, it will inevitably lead to the problem of intersection between metro line and existing Viaduct Pile foundation. In order to ensure the normal operation of viaduct and complete the construction task of Metro at the same time, pile underpinning technology has been successfully applied to such projects. On the basis of theoretical analysis and relying on the ramp of Jinan Metro Line R2 production station to Lihuang station, this paper carries out numerical simulation of underpinning construction and tunnel underpass through finite element software, studies the deformation law of underpinning structure, determines the engineering risk points, and verifies the underpinning scheme to be adopted. The results show that the overall settlement of underpinning structure and the horizontal deformation of pile body presents “bow” shape. The structural deformation is mainly affected by underpinning construction, and the deformation of underpinning beam and the top of pile is the largest. The influence area of the surface is 4 m outside the underpinning beam. The above deformations meet the requirements of the code, that is, the scheme of manual piling. And the process of pre jacking up→ chisel pile→construction of underpinning beam and pile cap→passage of shield machine are safe and feasible.
Design method and detailing requirements of a new type of fully assembled beam-column joints
Authors: Zhai Wei , Jiang Wen , Yang Jinhu , Yang Junfen , Qu Kai , Chen Lei 
Published: March 2020

Abstract
With the innovation of steel structural joints, requirements for the reasonable design methods tend to be intensified to guarantee the effectiveness of joints’ working performance. To provide a certain reference for the design of assembled joints, related checking calculation methods and detailing requirements of a new type of fully assembled beam-column joints are given based on experimental phenomenon and according to related standards.
Study on seismic performance of high pier multi-span beam bridge
Authors: Liu Manhui , Han Xiaodong , He Yiyang , Li Zhigang , Niu Zhe , Li Zihao 
Published: March 2020

Abstract
Girder bridge with high piers has obvious advantages in crossing deep gorges, and is commonly applied to highway construction in the western mountainous area of China. In Qinghai province, the earthquake response is very complicated, and the seismic design is absolutely necessary. In this paper, the seismic performance of the typical span of a high-pier-girder bridge in seismic zone of Qinghai province is analyzed by the time-history analysis method based on the existing seismic design code. The seismic response characteristics and development rules of the bridge are obtained, and the methods to effectively improve the integrating stiffness and seismic performance of the bridge are discussed. The results can provide references for the seismic design of the same kind of bridges.
Layout research of settling slurry velocity distribution in vertical pipeline
Authors: Tieli Wang 
Published: March 2020

Abstract
Based on the research results of slurries, the author sets out from momentum transfer, and analyses the momentum change of liquid and solid particle, and puts forward calculation model of settling slurry velocity distribution, liquid velocity distribution and solids particle velocity distribution in vertical pipeline. The vertical slurry experiment has been done to obtain the data about slurry velocity distribution, liquid velocity distribution and solids particle velocity distribution. At last simple verification has been made for the calculation model which has been put forward, and it is proved that the prediction value of the author’s model is accurate.
Checking and Optimum Design of Damping Hole in Lubricating Oil Circuit of DCT Complex Valve Body
Authors: Wang Li , Qin Yiwei 
Published: March 2020

Abstract
The complex hydraulic valve body in the DCT is an important controlling and influencing factor to realize the function of dual clutch transmission. This paper took a damping hole in the cooling lubricating oil circuit of DCT as the research object, analyzed the flow field of the oil circuit based on the modeling software of CATIA and Fluent, discussed the influence of the size of the damping hole on pressure establishment of the complex valve body related oil circuit, checked the structural design of damping hole in lubricating oil circuit, and proposed the scheme and method of structure optimization. The analysis results after optimization reached the expected inlet pressure of the damping hole, which proved the rationality of the optimized structure.