bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the computer system of train set shunting plan safety optimization of the hub type high-speed railway station
Authors: Guo Bin , Zhu Xiaoning , Wu Wanjing 
Published: May 2020

Abstract
Because the high-speed railway lines have connected into a network in China, the research of safety optimization of train set shunting plan of the hub type high-speed railway station is of great practical significance. To solve this problem, a time-space conflict resolution algorithm is proposed to minimize the total wait time of the train set on the station track, to optimize the timing and route of the train set shunting operation in two dimensions, and thus eliminate the route conflict. A computer system is developed based on the algorithm, a real world case study shows that the algorithm can eliminate the train route conflicts, ensure the safety of the plan, and the total wait time of the train set on the track is significantly decreased, and the utilization efficiency of the track is improved.
Study on Asymmetric Closure Scheme of Rigid Frame-Continuous Beam Composite System Bridge
Authors: Sun Hao , Zhang Xiao , Sun Jimei 
Published: May 2020

Abstract
The rigid frame-continuous beam composite system bridge has many spans, and the pier layout is different, and the demolition of temporary anchorage of pier and beam needs to undergo system transformation. Therefore, different closure sequence and the demolition time of temporary anchorage of pier and beam will have certain influence on the internal force and alignment of the main girder after completion of the bridge. Based on the practical engineering of the rigid frame-continuous beam composite system bridge constructed by asymmetric closure, four closure schemes were designed from two aspects: asymmetric closure sequence and temporary anchorage and demolition sequence. Based on the finite element model, the internal force and alignment of the main girder of the four closure schemes were compared and analyzed, and the general rules of closure of this type of bridge construction were summarized. The analysis and comparison results showed that the internal forces of the main girders are basically the same with different closure schemes, and the final linear shape of the main girders is different with different closure sequence. The results of this study can provide technical reference for sunhao2006@foxmail.com similar bridge construction decision-making and closure scheme determination.
Contribution of RC slabs to progressive collapse resistance of RC frame structures
Authors: Hou Jian , Sun Xiaoguang 
Published: May 2020

Abstract
The present study investigated the contribution of RC (reinforced concrete) slabs to progressive collapse resistance of RC frame structures based on experiment and numerical calculation. During the progressive collapse of a RC frame structure under a center column removal, the damage of floor slabs was obviously observed. This indicates that the RC slabs have a significant effect to the progressive collapse performances of the frame structures. Based on the failure phenomenon of RC slabs and its resistance mechanism of progressive collapse, a simplified calculation model of progressive collpase resistance of RC slabs was proposed. The contribution to collapse resistance and the proposed model of RC slab were verified using experimental and numerical calculation results with and without slabs.
Discussion on Monitoring Method for Horizontal Displacement of Supporting Pile Top of Deep Foundation Pit in Urban Rail Transit Project
Authors: Xu Yiteng , Yuan Fanglong , Wang Dayong , Yu Zhifa , Li Lixin 
Published: May 2020

Abstract
The horizontal displacement monitoring of the supporting piles plays a vital role in the safety judgment of deep foundation pit excavation and construction of main structure. In urban rail transit engineering, the monitoring of horizontal displacement of retaining pile top of deep foundation pit should be carried out according to the characteristics of the project, formulated a scientific monitoring plan, and selected a reasonable monitoring method. If necessary, the monitoring methods should be optimized and integrated, so as to get the real and effective monitoring data, which can reflect the change of the horizontal displacement of the foundation pit support structure to the greatest extent. By analyzing several common methods of deep foundation pit monitoring in current urban rail transit projects, the advantages and disadvantages of each method are summarized, and reasonable suggestions are proposed for accurate monitoring.
Influence of the pier heights on the seismic response of large rigid frame bridges in mountain regions
Authors: Li Xiaoqiong , Hung Lam Louis Chi 
Published: May 2020

Abstract
In recent years, several large rigid frame bridges with piers over 100 meters have been built in mountain regions in China. However, few studies are focused on the influence of the height of piers on the seismic performance of these bridges. Based on the sizes of piers of the existing large continuous rigid frame bridge in the world, finite element models with different pier heights of the bridges are established and dynamic analysis are conducted subjected to three-dimensional multi-support excitation. The seismic response of the structures is studied with the change of pier heights and natural periods. The results show that in actual engineering designs, it is strongly recommended that the adjacent piers with similar heights or very different heights should be avoided. The conclusion also provides suggestion to the design of large rigid frame bridges afterwards.
Effect of Carbon Nanofibers on Strength and Pore Structural Characteristics of Concrete
Authors: Zhang Hengbo , Xu Jinyu , Nie Liangxue 
Published: May 2020

Abstract
In order to investigate the influence of carbon nanofibers (CNFs) on the strength and internal pore structural characteristics of concrete, the carbon nanofibers reinforced concrete (CNFC) specimens with the content of 0%, 0.1%, 0.2%, 0.3% and 0.5% were prepared. The characteristics of the internal pore structure of specimens in each group were analyzed by the method of mercury intrusion porosimetry (MIP). The results show that the appropriate amount of CNFs has a significant enhancement effect on the strength of concrete, but the excessive amount of CNFs (0.5%) will weaken the performance of concrete; CNFs can effectively reduce the total pore volume and average pore size of concrete, and the internal pore structure of concrete can be improved reasonably.
Analysis of Urban Landscape Planning Based on Haze Environment
Authors: Zhang Yaoyao 
Published: May 2020

Abstract
With the acceleration of the urbanization process, the domestic economy has achieved rapid growth, but with the deterioration of the atmospheric environment, especially in cities with rapid industrial development, haze has been the primary air pollutant in recent years. All cities have been hit by haze. Frequent haze weather has seriously affected the lives of urban people, which makes us have to pay attention to how to deal with the haze problem. This article starts with the dangers of haze, analyzes the design principles of urban landscape planning, the active role of plant greening in the management of haze, and the method of arranging landscape plants. It shows that whether from the perspective of aesthetics, or from the function of anti-haze and environmental protection, the selection of a landscape design method that suits local conditions in the design will definitely be one of the major trends in urban landscape planning.
Energy Method on Dynamic Buckling of Elastic Bar with Clamped-Free boundary Condition subjected to Impact of Rigid Mass
Authors: Zhi Chaoyuan , Han Zhijun 
Published: May 2020

Abstract
Considering the effect of stress wave, the dynamic buckling problem of elastic bar with clamped-free boundary condition subjected to impact of rigid mass is studied using the energy method. The Lagrange function is built. Both of the trial function that satisfy the boundary conditions and the Lagrange function are substituted into the second Lagrange equation. After that an analytical expression of critical impact velocity can be deduced. By the analytical expression, it is obtained that the critical impact velocity is related to the impact mass of rigid block, the critical length and the inertia radius of the bar. The result show that the critical velocity decreases by increasing the impact mass and critical length, while increases by the increasing of inertia radius.
Characteristics of spontaneous commercial spaces in urban villages: a case study of three urban villages along Wuhe Avenue, Shenzhen City, China
Authors: Chen Shan , Zeng Qingyou 
Published: May 2020

Abstract
The mode of urban village renewal has changed from large-scale demolition and construction to organic renewal. The renewal of urban villages, especially commercial spaces, needs to be studied. Taking three urban villages along Wuhe Avenue in Longgang District, Shenzhen City, as examples, this study analyzed the characteristics of spontaneous commercial spaces and their existing problems. The study suggests that, for urban village renewal, the spontaneity and vitality of urban village businesses should be maintained and the environments of public spaces should be improved.
Sustainable Renewal of Recent-Past Detached House Based on Dynamic Development
Authors: Chen Wenchao , Yang Yifan 
Published: May 2020

Abstract
Through the analysis on the concept and characteristics of the recent-past detached houses, the necessity of sustainable renewal was expressed. On this basis, it analyzes the specific objects and technical routes of sustainable renewal of recent-past detached houses from multiple levels. Based on the aspects of building entities, external environment, and living form, this paper proposes a preliminary sustainable renewal strategy for the recent-past detached house.
Experimental study on static and dynamic mechanical properties of slag concrete
Authors: Chen Zhenfu , Li Shengbin 
Published: May 2020

Abstract
The slag concrete with 15%, 30% and 45% admixtures was prepared by the equal displacement cement method. The quasi-static mechanical properties of slag concrete were studied using a TYE-2000B pressure testing machine, and the dynamic mechanical properties of slag concrete under different strain rates were studied using a Φ100mm split Hopkin, and compared with ordinary concrete. Studies have shown that under quasi-static loading conditions, the compressive strength of slag concrete increases with the increase of slag content. Under dynamic load conditions, the strain rate sensitivity of slag concrete is significant. As the strain rate increases, the peak stress, strength enhancement factor and peak strain of slag concrete are significantly improved. In addition, the amount of slag is in the range of 0% to 45%. As the amount of slag increases, the dynamic compressive strength of the slag concrete increases.
Mechanical Property Study on the rigid deck pavement based on Midas/civil finite element software
Authors: Li Zilong , Yang Jianming , Kang Fulong , Wu Qiongfang 
Published: May 2020

Abstract
In recent years, with the rapid development of China’s economy, the traffic volume is also increasing, and more and more rigid deck pavement has been damaged in advance. This not only affects the beauty of the bridge, causes economic losses, but also seriously endangers traffic safety. By using Midas/civil finite element software to simulate the stress state of the rigid deck pavement, with the help of the data obtained from the analysis, it can be concluded that the rigid deck pavement is easy to be crushed in the middle of the span, and easy to be pulled and cracked on both sides.
Application of Construction Waste Mixture in Jingzhong Road Subbase
Authors: Liu Haitao 
Published: May 2020

Abstract
In order to test the usage of recycled mixture of concrete and brick slag in the road subbase, engineering test was carried out. By improving the construction technology of subgrade mixture, recycled concrete and recycled brick are mixed together with a weight ratio of 8:2 that applied to the municipal road subbase, and the purpose of reasonably utilizing construction waste and meeting the demand of municipal road base could be achieved. It was a beneficial attempt to the recycling of construction waste.
Particle shape effect on the mechanical properties of the granular material using novel 3D angular ellipsoid
Authors: Hu Fang , Hu Peng 
Published: May 2020

Abstract
Particle shape has long been a key issue for engineering. However, the underlying microscopic mechanism of this effect is not well understood, and thus the connection between the particle shape and mechanical behaviour of the particulate system remains empirical and qualitative. This study intends to obtain desired shape descriptors that govern the mechanical behaviour of a granular material at the particulate level and deduce a possible underlying micro-macro relationship between the particle shape parameters and the mechanical characteristics of the assembly of the particles. A modified open-source 3D discrete element code, Yade is used to simulate a series of tri-axial compression tests on specimens composed of angular ellipsoids. The mechanical behaviour such as the shear strength, the anti-deformation ability are obtained. The results show that the shear strength increases with the angularity. However it first increases then drops with the increase of the aspect ratio. The anti-deformation ability decreases with the increase of the aspect ratio and angularity. This study provides insight into the micro-macro relationship between mechanical properties and particle shape parameters.
Research on design of electromagnetic compatibility shielded anechoic chamber
Authors: Guo Shichao , Guo Dandan , Zhang Qiongyu , Wu Nankai 
Published: May 2020

Abstract
The electromagnetic compatibility(EMC) shielded anechoic chamber is a necessary place for the equipment to conduct electromagnetic compatibility testing. This article introduces the reasons for building an EMC anechoic chamber, and elaborates the problems that need attention in the construction of the shielded room. In particular, the key parts of the shielding shell design, the design of the absorbing material, and the electrical performance indicators were discussed in detail, and the construction of the anechoic chamber size requirements, ground installation, lighting system, and filter settings were prompted. At the same time, this article briefly introduces the use of anechoic chamber after completion.
Construction monitoring analysis on concrete continuous beams across Hanyi Expressway
Authors: Lv Yujie , Su Huifeng , Li Renzhuang 
Published: May 2020

Abstract
The Han-Yi high-speed railway bridge is a concrete continuous beam bridge, of which the Han-Yi expressway on the upper span is a (40 + 64 + 40) m two-line continuous beam, and the crossing distance between the center of the left line and the highway is DK1254 + 228.63. The intersection angle is 85 degrees. In order to ensure that the bridge closes smoothly, this article uses the finite element software Midas / Civil to build a finite element model, adopts a cyclic feedback construction monitoring scheme, and implements the control of the cross-section stress and deflection of the main beam in real-time during construction and feedback. In the whole construction process, the main beam elevation and stress are used as the main control indicators. The elevation mainly controls the line shape to ensure that the final bridge line shape and the design line shape are consistent; the stress is mainly found in a timely manner through the regular monitoring and analysis of abnormal conditions that may exist in the construction, and early warning is provided to ensure construction safety.
Establishment of Low Water Runoff Forecast Model in Yichun River Basin by Multiple Linear Regression Method
Authors: Xie Shiyao , Zhang Kaiwen , Li Yang , Dai Changlei 
Published: May 2020

Abstract
In this paper, the dry season runoff forecast equation model of the Yichun River Basin is established. Based on the analysis and study of the basin climate, meteorological characteristics, and dry season runoff inflow rules, the multiple linear regression method is used to screen the runoff forecast factors of the Yichun River basin during dry season, Measured hydrological sequence data. The model was tested using the measured data, and its prediction was very accurate. It can provide a reference for related dry river runoff forecast schemes of similar rivers.
Study on 3D Terrain Generation and Lightweighting Method of Highway
Authors: Chen Yinghao , Zhou Leisheng , Xia Jianping 
Published: May 2020

Abstract
BIM technology is widely used in highway engineering projects. During the transformation of 2D design and application to 3D, especially for special strip projects such as highways, 3D terrain has problems such as large loading efficiency and low efficiency. Based on the Beijing-Shanghai Highway reconstruction and expansion project, this paper studies the three-dimensional terrain generation and lightweight conversion methods of highway. The terrain construction method is optimized during the formation phase of the terrain, and the polygon is triangulated using the triangular surface growth algorithm. By generating the PHM (Polyhedral Mesh) terrain surface, a three-dimensional terrain model with no deviation, small volume and high generation efficiency is realized. The lightweight 3D terrain model generated by the modeling software can further simplify the 3D terrain and realize the pyramid terrain model with different loading accuracy with different sight distance through grid conversion and tin buffer generation. At the same time, the terrain is projected on satellite images, and The surrounding scenes are deeply fused. The results show that the lightening of terrain in the modeling stage is conducive to improving the modeling efficiency, eliminating the problems of large volume and stuttering of conventional terrain models, and improving the efficiency of terrain export. In the application phase, format conversion and pyramid loading are performed on the terrain, and the lightweight loading of the terrain model is truly realized. The terrain model is seamlessly integrated with the BIM road and other models, and at the same time, it covers elements such as satellite films, enabling real-time browsing based on the B / S (Brower/Server).
Experimental on electro-osmotic consolidation of bentonite reinforced by nano-Fe3O4
Authors: Li Gang , Zhang Rui , Liu Jia , Li Huanhuan , Liu Rui 
Published: May 2020

Abstract
In order to study the effect of nano-Fe3O4 on the electro-osmotic consolidation of bentonite, four groups of electro-osmotic consolidation tests (T1, T2, T3 and T4) of bentonite with different content of nano-Fe3O4 (0‰, 1‰, 2‰ and 3‰) were carried out with self-design electro-osmotic test device, and the change laws of current, potential, drainage, water content, pH value and shear strength during the test were analyzed. The results showed that the current and effective potential decreased with the increasing of time. After 48 hours, the current of T1-T4 decreased by 99.48%, 97.60%, 96.81% and 95.77%, respectively. The effective potential of T2 decreased the slowest, and the potential loss was significantly lower than the other groups. During the test, the drainage rate increased with the increasing of time. T2 has the largest drainage volume and the fastest drainage rate, and its water content is the lowest. The pH value increased with the increasing of the distance from the anode, while the shear strength decreased with the increasing of the distance from the anode. The results showed that nano-Fe3O4 could significantly increased the consolidation and drainage effect of bentonite.
Exploring the Design and Construction of Aluminum Formwork Based on BIM Technology
Authors: Zhang Longbo 
Published: May 2020

Abstract
Aluminum formwork is a new type of formwork system. It is easy to install and disassemble, can be turned over many times, has good forming effect, and has the advantages of green environmental protection. The application of aluminum formwork construction in construction projects can improve engineering construction efficiency and ensure project quality. BIM technology has the advantages of visualization, simulation and synergy. Combining the design and construction of aluminum formwork with BIM technology can give full play to the advantages of both, and use BIM technology to design, mold and construct aluminum formwork, effectively improving the design efficiency, optimization of the model. And in order to improve the level of aluminum formwork management, we can standardize the operation of construction personnel through the three-dimensional cross, so as to improve the level of construction technology. In view of this, this paper will summarize the application of BIM technology in the design and construction of aluminum formwork. The matters needing attention in the light of the BIM technology and the concept of aluminum template, combined with the principle and characteristics of BIM technology, and briefly analyze its economic benefits.
Zoning and Evaluation of Geological Disaster Vulnerability Based on Multi-source Data Integration in Loess Area of East Gansu --Taking Xifeng District as an Example
Authors: Hu Aiping , Wang Yun 
Published: May 2020

Abstract
Xifeng District, Qingyang City, Gansu Province is located in the hinterland of Dongzhi tableland in the East Gansu Loess Plateau. The common geological disasters in here are landslides, unstable slopes, and debris flows. From the multi-source data, 14 factors with obvious influence are selected to constitute the index system, and the weight of each factor is obtained by using the AHP method. Based on the multi-source data integration method, the 14 factors are superimposed to obtain the geological hazard-prone zoning and evaluation in this area. The evaluation results show that the area is divided into 3 areas prone to geological disasters, and 9 sub-areas. (1) The high-prone area accounts for 48.96% of the total area, and the geological disasters mainly are unstable slopes. (2) The medium-prone area accounts for 22.64% of the total area. (3) The low-prone area accounts for 28.4% of the total area. The results not only provide a theoretical and practical basis for the establishment of a geological hazard assessment system in the East Gansu Loess Region, but also provide an important basis for the urban planning development and environmental coordination in Qingyang City.
Mechanical and Thermal Behaviors of Cement Stabilized Compressed Earth Bricks
Authors: Chen Ronglin 
Published: May 2020

Abstract
Cement stabilized compressed earth brick is an important industrial raw material, and its mechanical and thermal properties have not been fully studied. The mechanical properties can be characterized by compressive strength index and thermal properties can be characterized by thermal conductivity index. The experimental scheme is arranged to solve the relationship between the performance of cement stabilized compressed earth brick and the influencing factors. The experimental results show that the compressive properties of cement stabilized compressed earth bricks are negatively correlated with the water binder ratio, positively correlated with the m (cement): m (water), and not significantly correlated with the m (earth): m (cement + water) and the fiber content. The thermal conductivity of raw soil cement curing mechanism brick is negatively correlated with m (earth): m (cement + water), positively correlated with water binder ratio, and not significantly correlated with m(cement): m (water) and fiber content.