bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on Fracture Characteristics of Asphalt Pavement with Longitudinal and Transverse Cracks under the Influence of Real Temperature Field
Authors: Zhao Kang , Yan Guannan , Li Jianfeng , Wang Linbing 
Published: April 2021

Abstract
In order to study the influence of the actual temperature field of asphalt pavement on the fracture characteristics of asphalt pavement structure, the finite element(FE) software ABAQUS is used to simulate the temperature field of asphalt pavement in summer and winter, and then the temperature field corresponding to specific time period is introduced into the thermal mechanical coupling analysis. The effects of different loading speeds (10, 20 m/s) and different loads sizes (0.7, 1.2 MPa) on the stress intensity factors (SIF) of top-down (longitudinal) and base reflective (transverse) cracks were studied, and the crack propagation characteristics were discussed. It is found that in summer, the top-down cracks in the surface layer mainly propagate in mode II, and the value increases with the increase of load. In winter, the low temperature promotes the propagation of mode I crack, and the sign of K? value in winter is opposite to that in summer. For the reflection crack of base course, the coupled field promotes the propagation of mode II crack at high temperature in summer. However, in winter, the base is prone to mode I expansion, and increases with the increase of load. When there is no coupling field, the speed has little effect on crack propagation, but the location of SIF peak value changes in time. In the coupled field, the SIF value increases with the decrease of speed. Therefore, considering the real temperature field, heavy load and slow speed have the greater damage to the pavement.
Force Characteristic Analysis of Different Steel Deck Pavement under Temperature Load Coupling Situation
Authors: Zhou Yan , Song Jun-chao , Meng Lingyue , Li Xiang 
Published: April 2021

Abstract
In order to investigate the force characteristic of different steel deck pavement under extreme temperature and load coupling situation, we established the three dimensional extreme high temperature and extreme low temperature field of simple supported beam bridge, the paving structure were double layered SMA, double layered epoxy concrete, SMA+GA, using material elastic modulus changing with temperature. Analysis indicated that the maximum value of high temperature normal stress occurred in the epoxy upper layer pavement, the maximum value of shear stress occurred in the epoxy lower layer pavement, the maximum value of high temperature strain occurred in the upper layer of double layered SMA pavement. The maximum value of low temperature stress occurred in the SMA+GA lower layer pavement, the maximum value of low temperature strain occurred in the SMA+GA upper layer pavement, the maximum value of shear strain occurred in the SMA lower layer pavement. The maximum value of high temperature stress usually occurred in the bottom of pavement layer, maximum strain usually occurred on top of pavement layer. The maximum value of low temperature shear stress and shear strain usually occurred in the bottom of pavement layer, normal strain occurred on top of pavement layer. The stress difference between the upper and lower layers in SMA+GA pavement structure is very large which adversely affected the structural force.
Analysis of the Influence of Underground Traffic Tunnels by the Explosion Seismic Effect of the Storage Yard
Authors: Hu Guangxia 
Published: April 2021

Abstract
The dynamic response of the existing deep underground traffic tunnel under the seismic effect of dangerous goods explosion is an important issue that should be actively considered before the construction of the container yard. In order to ensure the safety of the tunnel, this paper first introduces the goods to be stored in the newly built container yard of dangerous goods and their dangerous characteristics. Then, the vibration response of the tunnel wall under the explosion of 1 t, 2.6 t and 6 t TNT is simulated by using Midas GTS finite element analysis software. When the explosive equivalent is 2.6 t, the vibration speed of the tunnel wall is in a safety critical state. The simulation results provide reference suggestions for the types of engineering design stockpiles and limited stockpiles and control the influence of dangerous goods container yard on traffic tunnel from the source.
State -of -the -Art and Development of Seismic Analysis for Complex Bridges
Authors: Chen Yang , Wang Qiuliang 
Published: April 2021

Abstract
Due to the complexity of dynamic response characteristics of complex bridges, it is difficult to give uniform regulations to give comprehensive and complete guidance for its seismic analysis. In order to promote the development of seismic analysis of complex bridges, the research status and progress of complex bridge seismic analysis were discussed in detail. Firstly, the characteristics of the commonly used seismic analysis methods for bridges and their applicability to complex bridges were summarized. Secondly, the selection and synthesis methods of far-field and near-field seismic used for bridge seismic analysis were concluded. Meanwhile, the seismic input methods and the most unfavorable input direction of curved bridges were discussed. Then, the anti-seismic analysis model of the main components of bridges were summed up, and the medium-structure interaction (including pile-soil-structure interaction, abutment-soil-structure interaction and water-structure interaction, etc.) were investigated. Finally, on this basis, the unsolved problems and the future development directions in this research field were pointed out. It is concluded that the seismic analysis of complex bridges still has some shortcomings, which needs to be improved and developed.
Research on Maintenance Management of Flexible Pavement Based on C-LTPP
Authors: Cheng Chunru , Wang Linbing , Yang Hailu , Miao Yinghao 
Published: April 2021

Abstract
Based on the Canadian Long-Term Pavement Performance (C-LTPP) data, this paper chooses the road performance related data as variable factors. According to the Dipstick detection results, the characteristic values such as rut depth, wheel track width and cross section area are extracted to describe the rutting. This paper established the relationship between the pavement rutting and the cumulative service time, determined the rutting evaluation index, and proposed the pavement maintenance time threshold. Comparing the flexible layer overlay repair schemes used in various test points, it provides a reference for the pavement performance management decision-making and the road repair scheme design after repair.
Static Strain Analysis of CRTS I Bi-Block Ballastless Track
Authors: Zeng Zhiping , Ye Mengxuan , Wang Weidong , Guo Wuji , Meng Xiaobai 
Published: April 2021

Abstract
In this paper, relying on the National Engineering Laboratory of High-Speed Railway Construction Technology, a full-scale model of the double-block ballastless track structure is established, and the strain analysis of the layered track structure under different static loads is carried out, which has a certain practical significance for the design and maintenance of the high-speed railway ballastless track in our country. Research conclusion: (1) Under the action of static load, the sleeper directly under the rail is under compression; the four corners of the sleeper are tensile strain; (2) The strain at each measuring point on the surface of the track slab around the sleeper is compressive strain; the edge of the top surface of the track slab is compressive strain; The longitudinal strain at the bottom of the side of the track slab is tensile strain; (3) Under static load, the longitudinal strain measurement point on the top surface of the base plate is tensile strain at a distance of two sleepers from the static load position; the longitudinal strain at the bottom of the side of the base plate is tensile strain.
Analysis of the Influence of the Unsymmetrical Surface Surcharge on the Structure of the Subway Tunnel
Authors: Gu Xueying , Huang Tianrong , Shen Zhongyuan , Shi Gang , Wu Jianxun 
Published: April 2021

Abstract
Field case of staggered jointed lining of metro shield tunnel with an unexpected unsymmetrical surface surcharge is introduced in details at first. The finite element model of beam-spring is used to reproduce the surface surcharge process. Results show that the tunnel deviates from the surface surcharge under the action of unsymmetrical surface load. The displacement of adjacent rings A and B is different, which caused tunnel disease such as segment dislocation and water leakage. In the design state, the bending moment and axial force of A and B rings are close to each other, after unsymmetrical surface surcharge, the bending moment of ring B with key segment on the lower surface pressure side is larger than ring A. When the crack width is 0.2 mm, the corresponding horizontal expansion and vertical convergence are 33 mm (5.3D ‰) and 34 mm (5.5D ‰). When the horizontal expansion value is greater than 50 mm (8D ‰), ring B will enter into the stage of rapid development of cracks, which should be closely monitored and treatment measures should be taken when necessary. The bearing capacity of ring A and ring B is different after surface surcharge, which is suggested to be considered in the subsequent structural reinforcement.
Numerical Analysis for Earthquake Response of Polar Crane
Authors: Wang Zhiyun , Li Shouju , Yu Shen 
Published: April 2021

Abstract
To evaluate seismic properties of polar crane in nuclear power station, the earthquake responses of polar crane are analyzed. The first order frequency of polar crane fixed on containment wall is 2.44 Hz. The first order mode shape of polar crane is transverse horizontal deformation of two horizontal parallel main girders. El Centro earthquake loading and Los Angeles earthquake loading are used as input loadings on bottom the containment wall. The maximum accelerations of time histories of earthquake loading are normalized. The numerical simulation investigation shows that the maximum Mises stresses in mid-span of girder of polar crane under the action of El Centro earthquake loading and Los Angeles earthquake loading are 131 MPa and 133 MPa respectively, and they are less than permissible stress of material. The numerical simulations indicate that the wheels on polar crane don’t derail during earthquake process because the wheel pressure is always compressive state. Considering the El Centro earthquake loading, the maximum vertical acceleration on polar beam of containment wall is 3.3 m/s2 and less than gravity acceleration (9.8 m/s2).
Stability and Failure Analysis of Zhaoshuling Landslide under the Reservoir Water and Earthquake
Authors: Xie Biting , Zhang Xiuli , Wang Hao , Jiao Yuyong 
Published: April 2021

Abstract
Due to the reservoir impoundment, the geological environment in Three Gorges Reservoir area deteriorates, consequently inducing a series of geological hazards. Zhaoshuling landslide is one of the most important landslides in Three Gorges Reservoir area, and its safety seriously affects the planning and construction of the new-established Badong city. The unfavourable change of hydraulic condition, accompanied with earthquake, may cause landslide instability. In this paper, the stability and failure features of Zhaoshuling landslide under the reservoir water and earthquake are researched by discontinuous deformation analysis (DDA) method. The simulated results show that Zhaoshuling landslide is globally stable under the reservoir water and VII earthquake, while considering the degradation effect of rainfall and reservoir water on the strength of the sliding zone, the landslide may be damaged. The landslide damages more seriously at a low water level, the failure mode is creep and traction, and the failure mainly happens at the head and middle of landslide. Therefore, the head and middle of landslide is the key section of prevention and treatment.
Evaluation of Metro Fire Emergency Response Ability Based on WRSR
Authors: Jiang Xiaoshu , Dong Sihui 
Published: April 2021

Abstract
In order to clarify the status of subway fire emergency response capability, a comprehensive evaluation method based on the weighted rank-sum ratio method is proposed. Firstly, the factors affecting the emergency response capability of subway fire accidents was put forward on the basis of the current relevant laws and regulations, and a subway fire emergency response capability evaluation system was also built; secondly, the Analytic Network Process (ANP) was used to calculate the weight of each indicator in the system; then, the weighted rank sum ratio method (WRSR) is used to evaluate the overall status of the subway fire accident emergency response capability, and the sub-range of each subway emergency response capability is obtained; finally, model verification was conducted with 8 typical subways in Central China. The results show that C1, C3, C16, C20 and C29 constitute important indicators of subway fire emergency response capabilities; the constructed model can comprehensively evaluate the subway fire emergency response capabilities and facilitate its safety management.
Exploration into the Anti-Seismic Technologies in the Museum
Authors: Tian Jingneng , Song Maomao , Zhang Mansheng , Pan Jiao 
Published: April 2021

Abstract
The overall seismic isolation structure is adopted for Yunnan Provincial Museum. The paper explores anti-seismic technologies for both museum buildings and collections, offers seismic protection analysis and design for precious museum collections by taking into account seismic waves, buildings, exhibition facilities and collections as a whole. Based on the demand for protecting museum collections from earthquakes, the paper discusses proper anti-seismic technologies for the museum structure, exhibition facilities, showcases and collections; it offers the dynamic time-history analysis of seismic isolation structure in rare earthquakes, and gives anti-seismic analysis and design for collections based on the acceleration response of the floor on different levels. Conclusions: The seismic protection for museum collections shall take into consideration seismic transmission from the venue and structure to exhibition facilities, showcases and collections. Under seismic actions, the acceleration response of the floor of exhibition halls on different levels of the museum varies greatly, the seismic response of showcases reinforced with anti-seismic measures decreases significantly, which ensures the safety of museum collections in earthquakes. The paper focuses on the anti-seismic technical route, technical measures, assessment results and implementation suggestions, offering reference for the construction of new museums and the seismic preventive conservation of collections.
Simulation Analysis of Earthquake Resistance and Isolation of 220kV GIS Equipment in Tianjin
Authors: Li Shiyong , Tang Jipeng , Zhang Xiaoliang , Sun Nan , Zhang Fuheng 
Published: April 2021

Abstract
The anti-seismic and isolation simulation analysis of a 220 kV GIS equipment is carried out using finite element software. The response spectroscopy method is used to simulate the displacement and acceleration dynamic response of the whole structure under the two working conditions before and after the isolation device is installed, and to analyze the change of the natural frequency of the structure. The results show that the relative deformation of 220 kV GIS equipment is smaller than before isolation, and the vibration characteristics of the overall structure are close to the single-particle model, and the structure’s seismic performance is significantly enhanced for the maximum acceleration of the overall structure is reduced by 90%.
Application of Statistical Prediction Model to the Reservoir Induced Seismic Risk Analysis of Aqing Hydropower Station in Xizang
Authors: Zhou Chenghao , Zhang Lifen , Li Jinggang , Wang Yajie 
Published: April 2021

Abstract
Based on field seismic geological survey and previous research results, this paper analyzed tectonic background, seismicity and hydrogeological conditions of Aqing hydropower station in Xizang respectively, then calculated the probability of reservoir induced seismicity. The results showed that it is possible for the reservoir induced seismicity occurring, whose probability is 0.455. In detail, the probabilities of occurring moderate-strong, weak, and micro earthquake are 0.089, 0.070, and 0.296 respectively. Under these circumstances and based on the intensity attenuation relationship of reservoir induced seismicity, it can be deduced that the moderate-strong earthquake would occur with epicentral intensity VII, and the lengths of major axis and minor axis are 6.5 km and 3.3 km respectively.
Seismic Optimization Study of Substation Bus-Bar Connecting Circuit
Authors: Liu Zhenlin , Xue Yaodong , Zhang Xiaojun 
Published: April 2021

Abstract
Bus-bar is an important power transmission channel in substation. To improve the safety performance of bus under the action of earthquake, the finite element simulation calculation is carried out for the bus-bar circuit in UHV substation. And this study analyzes the influence of structural design parameters such as tube bus layout and bracket span on earthquake response of pillar insulator in the circuit. The results show that the seismic performance of the bus-bar connecting circuit can be optimized by using independent tubular bus layout for each span, increasing insulator support and reducing the span of single tubular bus.
Experience of Urban Solid Waste Management in Russia under the Concept of Smart City and Its Enlightenment to Shenyang
Authors: Wang Qiufei , Li Siyu 
Published: April 2021

Abstract
Using digital technology and artificial intelligence to improve the level of municipal solid waste management and to explore the new path orientation of urban management with Chinese characteristics is an important and key task of smart city construction. There are many similarities between Russia and China in urban construction, economic development and so on, so the experience of municipal solid waste management is of great significance to China’s urban construction. This paper analyzes the basic situation and reform process of Russian municipal solid waste, investigates the practice of Russian municipal solid waste management in the process of smart city construction, and sums up its successful experience on this basis, combined with the present situation of Shenyang, this paper puts forward some suggestions on the treatment of municipal solid waste under the background of the construction of smart city.
The Simulation and Optimization of Flow Field in the Low Temperature SCR Reactor
Authors: Wang Shuqin , Wang Jing , Wang Xin 
Published: April 2021

Abstract
The uniformity of flue gas velocity at the inlet of selective catalytic reduction denitrification reactor can improve the denitrification efficiency, and the reasonable layout of guide plate can improve the flue gas flow rate. Fluent is used to analyze the flow field in the inlet flue of denitrification reactor, and the flue gas velocity in the guide plate reactor arranged in different ways is simulated. The optimized layout mode is the form of radian plus straight plate, which is helpful to uniform flue gas velocity, improve denitrification efficiency, and help students to improve the understanding of reactor flow field uniformity.
Numerical Simulation of a Certain Engineering Vehicle Gearbox under Low Temperature Conditions
Authors: Feng Suli , Zhang Hongzhuang , Ma Changzheng 
Published: April 2021

Abstract
The gearbox is an important part of the reducer. Its components must have high bearing capacity and reliability. Cracks often appear in the gearbox body in the actual work, so it is necessary to carry on the structure analysis to the gearbox body performance. In this paper, a 3-D model of an engineering vehicle gearbox is established by using Solidworks software. Based on the model, the stress State and maximum displacement of the gearbox under low temperature conditions are analyzed. According to the calculation, the structure of the gearbox meets the design requirements. The analysis results provide a theoretical basis for the structural optimization of the gearbox.
Analysis of Landslides Stability Influenced by the Heavy Rainfall and Drawdown of Reservoir Water Level in Three Gorges Reservoir
Authors: Liu Yi , Zhao Binbin , Kong Xiaoang , Yang Zhi 
Published: April 2021

Abstract
Heavy rainfall and reservoir drawdown rate are primary factors when evaluating landslide stability. This paper intends to ensure the feasibility of increasing reservoir drawdown rate before flood season influenced by those two factors in the Three Gorges Reservoir (TGR) area. At first, a heavy rainfall was calculated by Pearson type ? distribution (PE3) using rainfall data of 20 counties from 1960 to 2010. Based on the reservoir operation, annual rainfall data was divided into four groups and calculated separately. The parameters of PE3 were estimated by curve fitting method and validated by Kolmogorov-Smirnov test. Then a reservoir drawdown model was proposed considering the actual regulation of reservoir. At last, a seepage-slope analysis was carried out using extreme rainfall and reservoir drawdown model on Sifangbai landslide. The extreme rainfall results show that the extreme rainfall during flood season was 2.5, 1.4 and 2.2 times greater than that in other three parts. Stability analysis showed that the landslide stability was mainly influenced by reservoir drawdown. Total time and elevation in rapid drawdown model would reduce with the increase of reservoir drawdown rate. With extreme rainfall data and reservoir drawdown model provided in this paper, similar partially submerged landslides in the TGR can be evaluated before increasing reservoir drawdown rate.
Perception Measurement of Interface Transparency on the Side of Living Commercial Streets in North China
Authors: Li Danyang , Fu Yao , Liu Yutong 
Published: April 2021

Abstract
Street space is a place where residents engage in daily activities, and its environmental design plays an important role in regulating the physical and mental comfort of people. However, the visual environment of street space is complex with many design elements, which is not conducive to grasping the design focus. Based on visual perception of comfort, the study deconstructs street space design into four basic elements: interface transparency, storefront density, interface colors and interface materials, and builds a virtual scene using SU software. The combination of human factors experiments and questionnaires is used to study the perception of street transparency, providing basic information and new research methods for the humanized design of the visual environment of street space.
Structural Characteristics and Properties of Polylactic Acid (PLA) and Cellulose Triacetate (CTA) Fibers for Heat-Not-Burn (HNB) Cigarettes
Authors: Ke Weichang , Miao Mengyu , Liu Bing , Wu Qiao , Liu Tong 
Published: April 2021

Abstract
In this work, two commonly used filter fibers for heat-not-burn (HNB) cigarettes, polylactic acid (PLA) and cellulose triacetate (CTA) fibers, have been extensively investigated by characterizing their morphologies, thermal and wetting properties. It is found that plenty of small pores can be observed in PLA fibers, which can provide more effective surface areas for the adsorption of mainstream smoke than CTA fibers with smooth surface. At the same time, thermal properties results including differential scanning calorimetry data, thermogravimetry data, and thermal conductivities of PLA and CTA fibers indicate that CTA fibers have an amorphous phase, while PLA fibers present a mixture of amorphous phase and crystalline phase with better thermal properties. Additionally, wetting properties demonstrate that PLA fibers have better adsorption properties than CTA fibers.