bluuebunny/crossref_metadata_2025 huggingface dataset:
Modeling the Thermal Comfort of Internal Building Spaces in Hospital
Authors: Volkov Andrey , Sedov Artem , Chelyshkov Pavel , Kulikova Ekaterina
Published: July 2014

Creating a comfortable indoor environment has been one of the mainconcerns when it comes to the design and operation of buildings. Buildings are a crucial part of our daily life, on average people spends 85 % of their time performing activities inside of buildings and therefore the quality of the indoor environment is a critical factor affecting the happiness and productivity of building users.The indoor environmental quality has a strong relationship on the thermal conditions of a space which is directly affected by the amount of heat lost or gained due to the properties of the materials used, the external environmental conditions and the inner sources of heat; In consequence, efforts have to be made to maintain proper thermal conditions by means of using natural and mechanical strategies to provide heating, cooling and ventilation. While the thermal comfort is an important aspect for the average user of a building, it becomes a critical aspect when it comes to population highly sensitive to thermal conditions. Children under and patients in hospitals with low levels of immune system are more likely to feel discomfort under certain operational conditions of ventilation, cooling and heating delivery systems.Particularly in this study have been investigated the thermal comfort and thermal comfort parameters for children, toddlers and hospital patients in three locations during the typical operation of systems in late spring.
Modeling the Thermal Comfort of Internal Building Spaces in Kindergarten
Authors: Volkov Andrey , Sedov Artem , Chelyshkov Pavel , Kulikova Ekaterina
Published: July 2014

Creating a comfortable indoor environment has been one of the mainconcerns when it comes to the design and operation of buildings. Buildings are a crucial part of our daily life, on average people spends 85 % of their time performing activities inside of buildings and therefore the quality of the indoor environment is a critical factor affecting the happiness and productivity of building users.The indoor environmental quality has a strong relationship on the thermal conditions of a space which is directly affected by the amount of heat lost or gained due to the properties of the materials used, the external environmental conditions and the inner sources of heat; In consequence, efforts have to be made to maintain proper thermal conditions by means of using natural and mechanical strategies to provide heating, cooling and ventilation. While the thermal comfort is an important aspect for the average user of a building, it becomes a critical aspect when it comes to population highly sensitive to thermal conditions.
Research on Window Cleaning Methods for High-Rise Residences in Severe Cold Zones
Authors: Chen Bing Li
Published: July 2014

With the increasing height of buildings, cleaning the glass of high-rise residential buildings represents a lot of potential safety hazards. The difficulty for households to clean their windows has become a concern for everyone. To solve the problem fundamentally, we need to start from the architectural design and make technical improvements to the traditional practices. This paper raises specific measures on this subject and discusses the possibilities of these measures.
Residential Typology on Contemporary City-Complex
Authors: Liu Han Zhou
Published: July 2014

City-complex, a highly definite stage, usually presents to the lager city of the developed capitalism countries with high urbanization degree. However, there have appeared the upsurges of the complex’s development and construction in China, which is still in lower urbanization degree. In this article, author set about from the city-complex's perceive definition, and reviewed the developed characteristics of city-complex during deferent history periods, then analyzed contemporary city-complex’s design forms and development tendency in China.
Environment Redesigned for Crime Prevention with CPTED Strategies — A Case Study of Typical Chinese Community
Authors: Liu Cheng
Published: July 2014

Old communities suffer increasing crime rates in China. The original environment layout can not meet the needs of living safety and needs redesign for crime prevention. The theory of Crime Prevention Through Environmental Design or CPTED is based on one simple idea that crime results partly from the opportunities presented by physical environment. It is possible to alter the physical environment so that crime is less likely to occur. This paper focuses on CPTED strategies applied to a typical Chinese community for neighborhood renewal. The physical environment problems associated with community crime and fear of crime are first identified. Four distinct ways to implement CPTED strategies are emphasized and discussed in detail individually in the research: community layout, traffic, landscaping and buildings. The paper ends with pending issues and a major lesson that CPTED must be tailored to the specific problems occurring in particular settings.
Research on the Ecological Concept of Traditional Villages in the Yellow River Basin
Authors: Ma Jing , Wu Wen Cong , Hou Ting Ting
Published: July 2014

The traditional village which located in the Yellow River Basin is the origin of Chinese traditional culture and traditional roots. It contains rich ecological culture concept and build wisdom. Not only the traditional village has the function of the historical and cultural heritage, but also has important value on promoting the construction of ecological civilization. The paper applies field investigation method of the traditional village in the Yellow River Basin, analyzes the traditional village ecological construction concept and aims at providing theoretical references and examples for the new rural construction and the coordinated development of ecological environment.
Conservation and Application of the Chinese Historical and Cultural Building Concept
Authors: Dong Zheng Lei
Published: July 2014

To convert the ecological value into a physical presence of contemporary architecture, it’s required to find out the modern elements and materials in the traditional architectural form as well as their modern use and development in technology; besides, the traditional architectural form and function shall reach a perfect harmony with the modern lifestyle, thus the “conversion of diversity” in form will be completed based on the generalization of traditional forms and by using the method of variant deconstruction and reconstruction.
Impact Analysis Lingnan Vernacular Architecture on New Buildings Subtropical from the Perspective of Ventilation and Insulation
Authors: Pan Ying , Zou Qi
Published: July 2014

According to the subtropical natural conditions that Lingnan vernacular architecture remain in, local people construct buildings which are suited to the local climatic conditions. In this paper, the impact Lingnan vernacular architecture on new buildings subtropical is revealed through the analysis of the vernacular ventilation and insulation techniques combined with certain cases.
Study Based on Mixed Scanning Method-Taking Gongqing Digital Eco City as an Example
Authors: Li Xiao Qiong , Zhang Wei , Tao Chun Yuan , Wang Ying Xiang
Published: July 2014

Mixed scanning method is one of the main methods of modern city planning, it considers both the whole and the key. Mixed scanning method is especially suitable for. The study on the relationship between Gongqing DigiEcoCity Gongqing city. Gongqing city is the background of Gongqing DigiEcoCity whose planning must be based on overall framework of Gongqing city, so that economic and social development has complementary effect, and achieve a win-win situation.
Development Length Comparison between Australian Codes and Chinese Code on 500MPa Steel Bars
Authors: Su Jing Wen , Li Hai Tao , Liu Li Xin , Deeks A.J. , Wu Fan , Zhang Ling Fei , Li Shu Heng
Published: July 2014

This paper presents development length comparison between Chinese and Australian codes study on HRB500 steel bars in concrete. After introducing the existing code provisions about the anchorage length and experimental investigation of tensile HRB500 steel bars, the calculation approaches in different codes are compared with the test data. Additionally, the development length of tensile HRB500 reinforcement bars in AS3600-2001, Proposed Revision of AS3600, GB50010-2010 and the calculation equation proposed from test results are compared with each other in beams and slabs. It is proved that AS3600-2001 is inconsistent with other standards and the tests results and needs to be revised, while the Proposed Revision of AS3600 provided a good agreement with the test data and brings the code into line with other international codes, particularly Eurocode 2. Moreover, the Proposed Revision of AS3600 is a significant improvement on the method in AS3600-2001. The anchorage length formula in GB50010-2010 can still be used for designing HRB500 steel bar.
A Cracked-Comminuted Response Model of Confined Concrete Based on Griffith Strength Theory
Authors: Wan Fan , Jiang Zhi Gang , Zhen Ming
Published: July 2014

A dynamic spherical cracked-comminuted response model was proposed for the penetration into confined concrete targets with finite radius and lateral elastic confinement. The material was described by linear pressure-volumetric strain relation and Griffith strength theory in the comminuted region, and described as incompressible in the cracked region. Numerical results show that the cracked-comminuted interface velocity and the cavity expansion stress increase with the increase of cavity expansion velocity, the ratio of targets radius to comminuted region radius and the lateral confining rigidity.
Finite Element Analysis on the Fire Resistance of the Effect of Thickness of Elliptical Steel Tubular Columns Filled with Concrete at Elevated Temperature
Authors: Fan Te Wei
Published: July 2014

elliptical Concrete-filled steel tubular (ECFT) columns are often used as the main supporting columns for high-rise buildings and has become a topic of academic concern. The past research about ECFT most focused on its ultimate strength and mechanical behavior. The experiment method which is usually expensive and time-consuming. Other research methods include combining experimental data with appropriate theory to design or calculate the structural properties, and these methods tend to have a conservative assessment of the results. Therefore, some researches have been developing finite element model to simulate and analyze the ultimate strength and buckling condition of ECFT and its component behavior. In this paper, finite element analysis is used to explore the mechanical behavior of ECFT during exerting axial compression load. Contact pair settings and friction coefficient settings were compared with different pattern to investigate the accuracy of simulation and the mechanical behavior of ECFT columns. Study found that the ultimate strength for ECFT columns obtained by finite element analysis can achieve good accuracy, and in the meantime the mechanical behavior simulation of ECFT columns with proper finite element settings could be achieved.
Transformation and Rebirth of “Wayao” Creative Park
Authors: Qiu Xiao Xia , Zhao Qing
Published: July 2014

In the critical situation that industrial architectures might be removed, transformed, renovated or just disappeared naturally, a combination of creative industry with heritage industry can bring new vitality to the disappearing architectures. This paper analyzes Wayao Creative Industrial Park which is transformed from Shanxi Polyester Plant in such perspectives as planning, architecture and landscape, to fully demonstrate its present status and future development trends.
Bearing Behavior Study of Rammed Cement-Soil Pile Compounded Foundation in Collapsible Loess
Authors: Li Yue Hui , Gao Xiao Juan
Published: July 2014

The rammed cement-soil pile compounded foundation is widely used in collapsible loess of northwest China. There are many factors influencing the bearing capacity of compounded foundation. The calculation result with empirical formula are usually not accurate. The influence factors on bearing capacity of compounded foundation are analyzed with finite element method based on the static load results. The result show that pile body elastic modulus has little effect on the bearing capacity of compounded foundation. This is quite different from bearing behavior of single pile. However, the soil parameters, such as soil elastic modulus, soil internal friction angle and soil cohesion have significant impact on compounded foundation bearing capacity.
The Feasibility Study of Infering Steel Strength with Leeb Hardness
Authors: Zhang Shu Xun , Wang Hao , Wang Yong , Ding Bei Dou , Feng Zhao Ping
Published: July 2014

Applling Leeb hardness tester D punch, examined the steel hardness by two different ways of clamping method and coupling method respectively, studied the correlation of Leeb hardness and steel strength, compared the research results with related literature and Jiangsu province construction standard of DGJ32/ TJ116-2011. Through the research, the conclusion is larger that this research results and related literature, the reliability is very low which be used to infer steel tensile strength with the D punch testing Leeb hardness .
The Research of Test on Stress-Strain Constitutive Relations of Straw Concrete
Authors: Liu Wei , Xi Wei , Zhang Yi Lu
Published: July 2014

As a new green building material, straw concrete are introduced about its mechanical properties and characteristics. Mechanical properties test such as prism compressive strength, elastic modulus and Poisson's ratios use standard prismatic blocks. Under different rate of corn straw, cement, sand and fly ash, test gets the full stress-strain curve. Results show that with increase of volume of corn straw, the prism compressive strength reduces significantly. Comparing with natural concrete, elastic modulus of straw concrete can reduces greatly. Poisson’s ratio reduces with increase of volume of corn straw. Fly ash could improve property of the material and replace cement, but excessive replacement will reduce the strength of material.
Analysis on the Shape Features and Heat Consumption of the Qing-Official-Style Archaized Buildings
Authors: Wang Sa , Zhao Jun
Published: July 2014

Three variables of the Dou-kou size, the Cuan-dang number and the Bu-jia number are summarized according to the official style of wooden buildings in Qing dynasties. The heat consumption index of archaized buildings has the following rules: 1. Heat transfer index of building envelope is independent of the size of Dou-kou and decreases as the increase of building lengths and widths with the decrease of reduction ratio; 2. Heat consumption index of air infiltration appears linear growth with the change of Dou-kou size and increases along with the increase of the length and width with the growth rate decreases; 3. According to different size of the Qing-official-style archaized buildings, conclude the critical values of three variables that decide which parts is the main way of energy loss in the total heat consumption.
Experimental Study on Controlling Rail Corrugation by Tuning Rail Damper
Authors: Zhang Heng , Jiang Liang , Li Yu Jie , Meng Lei , An Xiao Shi
Published: July 2014

At a serious rail corrugation line along Beijing metro Yi-zhuang line, one experiment of controlling rail corrugation has done. Based on the test and analysis of rail vibration decay rate, rail surface roughness and vibration acceleration on the rail and track bed before and after install TRD, it is concluded that install TRD on rail waist could improve rail damping, enhance rail vibration decay rate, speed up vibration wave propagation decay in the rail, reduce the vertical vibration of rail and track bed, and control the development of rail corrugation.
Study on Failure Mechanism and Prevention Measures of Typical Rock Slope in Tibetan Plateau
Authors: Zhao Jie
Published: July 2014

The special geographical, climatic conditions and geological structure in Tibetan Plateau making high steep rock slopes along the valleys wide-spread in this area, and they are especially common in the construction of highways. In this study, geological genesis and potential sliding mode are discussed firstly, then numerical model results as well as actual data are used to analyze the cause and influence depth of unloading fissures. Finally, common problems exist in rock slope are summed up. Based on these, natural state, disturbed state and steady state after reinforcement are analyzed respectively. It is believed that rock slopes in this area should be considered to minimize unloading, changing their shapes, and should try to reinforce actively or take positive reinforcement measures, so that the disturbance caused by rock soil environment will be effectively controlled, and the ecological restoration work will be done.
Three-Dimensional Finite Element Analysis on Subgrade Dynamic Stress Response under Moving Load
Authors: Xu Zhong Qi , Liu Da Peng , Wang Jing
Published: July 2014

Subgrade stress under static vehicle load is different from that under moving load. In order to study the law of subgrade dynamic stress under moving vehicle load, the paper established the three-dimensional analysis model with finite element software and calculated the subgrade dynamic stress of different depth. It is concluded that subgrade dynamic stress decreases with the increase of depth and the smaller the depth is, the faster the degradation is. To a certain depth, subgrade dynamic stress changes a little. Meanwhile, the paper analyzed the effect of surface layer modulus and thickness, roadbase modulus and the thickness, subgrade modulus on subgrade dynamic stress. It is concluded that surface layer modulus and thickness have little effect on subgrade dynamic stress , subgrade dynamic stress decreases when roadbase modulus and the thickness increase, especially for the depth of the subgrade is relatively small. Subgrade dynamic stress increases with the increase of subgrade modulus. Increase trend is more obvious when the depth is small.
Time-Domain Simulation of High-Speed Railway Track Irregularity
Authors: Du You Fu , Chen Chu Yang , Li Xiang Na
Published: July 2014

It was more convenient to describe track irregularity by the spatial frequency.The conventional frequency-domain transfer function can not effectively solve the vibration equation when anlysis of the vibration response to structure of vehicle-track dynamic coupling system, the time domain numerical integration must be used to solve it.The trigonometric series superposition method can be used to convert track irregularity spectrum into time domain frequency power spectral density function, and then turn the simulated irregularity samples into spectral density by the Inverse Fast Fourier Transform (IFFT), which compared with the theoretical spectral density to test the reliability of the sample. The results show that the simulated sample have the same characteristics with the given power spectral density function, which demonstrate the high reliability of this sample and it can be used as the external excitation of the locomotive vehicle system.
Grey Relational Analysis of Fiber Asphalt Mixture Based on Pavement Performance and Economic Benefits
Authors: Zhang Hua , Du Xiao Hu , Hao Pei Wen , Liu Li
Published: July 2014

In order to explore performance and economic benefits of the most commonly used fiber asphalt mixture, four types of fiber asphalt mixture were studied in this paper through a series of capability tests, such as water stability, high stability, low temperature crack resistance and fatigue stability test. Based on dynamic stability, low temperature bending strain, freeze-thaw splitting strength ratio, fatigue life and cost per square meter as the evaluation index, Grey Relational Analysis (GRA) was proposed in this study to determine the best performance and economic benefits of fiber asphalt mixture. The results show that Fiber B asphalt mixture only has better anti-cracking performance in low temperature and fatigue life,but fiber C asphalt mixture has better performance and economy than the other three fiber asphalt mixtures under the same conditions with grey relational analysis.
Modulus Back-Calculation Based on FWD Dynamic Deflection Basin for Semi-Rigid Base Asphalt Pavement
Authors: Zhuang Chuan Yi , Ye Ya Li
Published: July 2014

To study semi-rigid base asphalt pavement response characteristics, two structural APT test roads of cement stabilized aggregate and lime fly-ash stabilized aggregate were constructed, and accelerated loading test was developed. After certain number of wheel loads (70,000 times) pavement deflection basin parameters were detected by using the falling weight deflectometer, then modulus of each pavement layer was back-calculated, dynamic response was analyzed. Studies have shown that the modulus of semi-rigid base decay faster, and with decreasing thickness of the semi-rigid base, the greater the rate of decay of modulus; cement stabilized aggregate decay rate is greater than that of lime fly-ash stabilized aggregate.
Analysis and Reference of Local Railway Operation and Management Mode
Authors: Guo Xiong , Sun Hong Sheng , Wang Xi Fu
Published: July 2014

Local railway is mainly constructed by local investment or joint investment with other railways. It shoulders the transportation of local public passengers and short distance of railway goods, and bears the task of boosting local economy and domestic demands [1]. Choosing suitable local railway operation management mode could help to realize maximal economic benefits with least amount of investment, and best management. Through the analysis of China's local railway company operation and management model, this paper proposes five methods to guide how to choose local railway operation and management mode.
Analysis of Settling Character and Prediction Result of the Red Sandstone Dynamic Compaction Embankment
Authors: Ren Yuan Yuan , Wang Jing
Published: July 2014

The particles of red sandstone will be softened under the dry-wet-cycle condition which leads to the decrease of red sandstone strength. In addition, the roadbed of red sandstone shows larger post construction settlement and differential settlement under mixing effects of the external load and the soil weight. For this reason, the research on the change of characteristics of settlement of red sandstone dynamic compaction embankment was conducted, adopting unequal interval grey model and equal-dimensional new information prediction model to predictively analyze the result of settlement variation. The results show that the results of equal-dimensional new information prediction model is much closer to the measurement, which means this prediction model is more applicable for the settlement prediction of dynamic compaction embankment. Consequently, practical reference could be provided for analogous project.
Application of Bentley Power Rail Track Software in the BIM Railway Design
Authors: Sheng Xi , Luo Hua Peng , Wang Ping
Published: July 2014

Belonging to the Bentley Microstation series which work as one of the BIM platforms, the Bentley Power Rail Track shows huge advantages in the railway design for its visibility, high efficiency, advance, reliability and so on. This paper introduces the way to build the digital terrain model, alignments, cross sections, turnouts and to display the three-dimensional model of the railway for the Bentley Power Rail Track 3D railway design software. It provides application preparation for the BIM railway design and achieves the preliminary exploration of BIM applications. Bentley Power Rail Track proves capable of the BIM railway design.
Application of Stress Absorbing Layer in Project
Authors: Li Hai Zhan
Published: July 2014

To study the anti-cracking mechanism of stress absorbing layer. This paper, which determines the parameter of the sand asphalt mix design of AC-5 and proceeds the mix design, is based on Xinyang freeway (The bid section 1 of Huazhuang-Xincai section). Asphalt content is tested by ignition oven asphalt content test.Screening aggregate recovered from ignition oven asphalt content test .Using roughness, thickness, compaction in field evaluation.The results show that the positive S model of aggregate gradation and reasonable construction temperature and construction technology are contributed to anti-cracking of stress absorbing layer.The impermeable SBS modified asphalt stress absorbing layer could prevent the base and subgrade from eroding.
Quantitative Analysis in the Coordinated Development of Human Settlements Environment and Economy for Guizhou
Authors: Li Lu , Xue Xian Gui
Published: July 2014

This paper used the objective method by principal component analysis and fuzzy mathematics method to assess the coordination degree of human settlements environment and economy since 2005 in Guizhou.Combined with the reality to propose the main countermeasure to realize the regional sustainable development.
Design and Behavior of RPC Slab Track
Authors: Yang Jian , Wang Jin Sheng , Peng Xin
Published: July 2014

Reactive Powder Concrete is proposed to be used in the ballastless track for its excellent material properties due to existing problems of high speed railway ballastless track. Three different unit types of RPC frame slab track were proposed through optimization design and the mechanical behavior of these frame slab track was analyzed. The results show that the RPC slab track meet the requirements of bearing capacity, the suggested type of RPC slab track is a frame slab with increased thickness because of its higher techno-economic advantages.
Design Countermeasures of Preventing Frost Heaving of the Airport Cement Concrete Pavement in Cold Area
Authors: Shi Bao Hua , Mei Ping , Zhang Ya Men , Cao Bing
Published: July 2014

In order to guarantee the design quality of the pavement in a cold area, by analyzing the nature conditions in the area, such a cold and long winter, short summer and high altitude, based on the reason of road frost damage, not only submit the design measure according to the basic performance requirements of structure of materials and the thickness of frost layer, but also submit the design measures according to provision of drainage system, isolated layers and blocking groundwater sources..
The Initial Study of Evaluation System in Hot-Summer and Warm-Winter Region
Authors: Ni Yi Lan , Fang Li Wei , Zhou Yi Xi , Huang Ming Si
Published: July 2014

In over decades, the architectural evaluation system is playing an more important role in the building energy-saving after the implementation and modification of all evaluation systems. Most of current green architectural evaluation systems remain in the level of single building evaluation, so a set of comprehensive and effective green architectural evaluation system is needed. This paper has analyzed the domestic and oversea evaluation systems of the Green Residence, considering regional characteristics, and examined the indicators of the Hot-summer and Warm-winter Region Evaluation System for providing a reference to the development of Chinese regional residence evaluation system. Some suggestions for the development of Chinese green residential evaluation system are provided through analyzing advantages and disadvantages of evaluation systems in guiding the construction of ecological residential.
Detection and Assessment Methods for the Planeness of Planes' Asphalt Road Runway
Authors: Huang Wei Ye , Shi Bao Hua , Zhang Ya Men , Zhou Wei
Published: July 2014

To guarantee the safe use of road runway for planes (hereafter referred to as road runway), based on the concept of planeness, not only three meters' straight edge, continuous planeness measuring equipment, vehicular jolt-integrator and evaluation variables mean square error were analyzed, but also conducted a comparative analysis to the roughness evaluation methods of functional road pavement, civil airports and military airports. Combining with the usage condition of ideograph in China, it offered an evaluation method for the asphalt pavement's roughness of road runway, which can provide references for the usage management of road runway.
Dynamic Consolidation Ground Reclamation Vibration Transmission Mechanism and Impact Studies on Composite Foundation
Authors: Li Yan Feng , Zhang Jing Juan , Dou Yuan Ming , Guo Zeng
Published: July 2014

Combined with dynamic consolidation Caofeidian area of land reclamation project examples, Vibration transmission mechanism of dynamic consolidation and reclamation of the foundation were explored, obtaining acceleration attenuation law, and studying and analyzing the impact of strong vibrating composite foundation. Research provide important theoretical basis to guide Dynamic Consolidation coastal reclamation foundation design and construction.
Effect of Reinforcing the Base of Pavement with Steel Geogrid
Authors: Matveev Sergey A. , Martynov Evgeny A. , Litvinov Nikolai N.
Published: July 2014

The report carries the information about tests of crushed-stone and sand sub-base of pavement reinforced with steel geogrid. As a result we have deformation characteristics of the base of pavement, the effect of reinforcing and deformation regularities of reinforced crushed-stone-sandy structures. We have determined the reinforcing coefficients of steel geogrid.
Effect of Temperature on Volumetric Parameters of Rubber Modified Asphalt Mixture
Authors: Bi Xu Bing
Published: July 2014

In this study, contrasted rubber modified asphalt and SBS modified asphalt, the mixture of AC-13C, SMA-13 and AR-AC13 are used for compaction test in the range of 120~200 °C as to covering the actual road construction compaction temperature. It can simulated the road compaction performance.The results showed that the temperature is a great influence on the volume parameter of rubber modified asphalt mixture. In the range of 160~180 °C, the void fraction, VMA and VFA of modified asphalt mixture is not sensitive to temperature, improving mixing temperature is not meaningful to improve the quality of compaction. When the temperature dropped to below 160 °C, the VMA rise rapidly, VFA falling rapidly, the increase of void fraction also present a "linear" trend, at this stage to improve mixing temperature can improve the compaction quality.
Microscopic Analysis of Rutting Formation of Dense Graded Asphalt Concrete
Authors: Li Yan Li
Published: July 2014

In this paper, digital image processing technology (DIP) is adopted to study the image particle characteristics and mobile trajectory of coarse aggregate. The results show that the DIP particle motion distance accords with the rut test experimental results. The mobile trajectory of coarse aggregates was vertically downward firstly, then to move on both sides at an angle. For dense graded asphalt concrete, the contribution of the asphalt mortar is larger than the coarse aggregates, when resisting vehicular loads.
Newly-Constructed Cement Concrete Pavement Crack Renovation Technique
Authors: Liu Ying , Luo Zhu
Published: July 2014

This paper addresses cracks arising on a newly-constructed cement concrete pavement, which need to be treated prior to handover acceptance. They should be renovated by taking different treatment measures, depending on their number, form and location. After the cracks are renovated, the service performance of the pavement can be enhanced and its service life extended.
Case Study on Composite Bridge Pier Construction Method
Authors: Lin Jih Shao , Cheng Shao Tsai , Liu I Tsen
Published: July 2014

In recent years, Taiwan launched railway reconstruction projects to promote urban renewal and rural development. As the area of reconstruction projects is adjacent to the railway in operation, there are hidden risks to construction personnel and safety of the railway operations. The composite pier engineering method can improve construction safety and reduce risk. This paper presents a case study and discussion on risk management to provide the lesson learn for reference.
Orthogonal Test Research on Molding and Curing for Cold Recycle Mix with Emulsified Asphalt
Authors: Yang Yan Hai , Yang Ye , Shen Yang
Published: July 2014

Cold recycle mixture with emulsified asphalt is a material which is economical, environmental and energy saving. Now it is widely applied to road recycling engineering, while there is no unified standard for its molding and curing methods. The orthogonal test shows that cold recycle mix with emulsified asphalt can get the better technical indicators after the molding and curing methods. At first, each side 50 times compaction after mixture putting into mold. Then put specimen side in the 60°C wind drying oven at least 40 hours. Next take the specimen out and compact each side 25 times immediately. Finally put specimen side on the ground at least 12 hours at room temperature, and then take the test-piece from the mold for test.
Research and Analysis of Temperature Anti-Rutting Performance Evaluation Index for Asphalt Pavement
Authors: Wu Rui Jun
Published: July 2014

In order to solve current airfield asphalt road surface high temperature performance evaluation index defective problem, through the hamburg wheel tracking test, general rutting test and uniaxial penetration to test three gradation mixture, and comprehensive analysis of dynamic stability, creep slope and the shear strength index. So suggest using dynamic stability and hamburg wheel tracking creep slope, rutting depth combination evaluation mixture at high temperature performance advantages and disadvantages.
Research on the Behavior of Rigid Pavement of Basalt Fiber Reinforced Dowel Bar under the Condition of Variable Temperature
Authors: Zhang Ya Ting , Zhou Chun Xiu , Huang Zhi Yi , Wang Jin Chang , Wu Gang Bing , Jiang Shan
Published: July 2014

This paper analyzed temperature field and temperature stress of cement concrete pavement under periodic variable low temperature using finite element method modeling technique in ABAQUS. And discussed the effect of wind speed, surface thermal conductivity coefficient on temperature field. Cracking and warping at the joint of concrete panel was simulated to analyze pavement deformation and mechanical characteristics. Results show that at lower temperature, concrete face will appear horizontal longitudinal displacement, causing the appearance of cracking; and warping effect will appear at the concrete panel, leading to concrete pavement void. It is revealed that dowel bar has not occurred plastic deformation, that is, bending strength meets the requirements.
Review of the Influencing Factors of Pressure Exert on Compartment by Bulk Goods
Authors: Feng Xiao Jing , Wei Tong , Zuo Zhong Yi
Published: July 2014

The pressure on the wagon body is generated for stochastic vibration of train or vehicle. The value and variation of this dynamic pressure are great significance in the study of the fatigue strength of the wagon body. This paper reviews the various influencing factors of the pressure distribution and also summarizes its simulation and prediction method based on the sufficiently literature reading.
Static Contact Characteristics Analysis of Wide Base Tire against Hot Asphalt Pavement
Authors: Wu Ren Zhi , Du Wei , Shao Lin Qiang , Mi Zhi Nan
Published: July 2014

In order to analyze mechanism of pneumatic tire rollers compacting against hot asphalt pavement, taking the process of wide base tire of rollers compacting against hot asphalt pavement as research object, the wide base tire is loaded up with inflation pressure and axial force to study the contact characteristics. Two finite element contact models are established by ANSYS, one of which is for the contact of wide base tire against rigid pavement, and the other is for the contact of wide base tire against hot asphalt pavement. The static contact characteristics of wide base tire against hot asphalt pavement are achieved though FEA method, including whole deformation of tire, formation variation of contact patch, and stress distribution of contact area.
Study on the Design Method of Prestressed Concrete Sleeper Based on Chinese and American Criteria
Authors: Luo Hua Peng , Sheng Xi , Chen Pan , Wang Ping
Published: July 2014

For the design of prestressed concrete sleeper, design methods and standards in different countries are different. America and China design sleeper by the allowable stress method, UIC design by probability limit design method. China has design II-sleeper by the method of reliability, but the theory is not immature so that II-sleeper appeared a lot of cracking problem. In recent years, designing IIIa-sleeper still use the allowable stress method. By contrast of process of designing IIIa-sleeper in China and America, include design load moment, the prestress loss, bearing capacity of structure, test and so on. Get the main difference of designing sleeper in China and America, and the rationality and practicability of different design method.
Study on the Effect of WMA Additive to the Asphalt Technical Properties
Authors: Liu Zhan Liang , Du Yu Lin , Du Li Feng
Published: July 2014

This paper studied the influence of WMA to asphalt technical properties through the three indexes and the viscosity experiment of asphalt. It showed that the asphalt properties were affected in different degree with the addition of the WMA additive, and the base asphalt is more sensible to WMA additive than the SBS modified asphalt to it.
Study on the Resistance to Water of CA Mortar Used in CRTSII Ballastless Slab Track
Authors: Sun Hong You , Ma Xu Feng , Wang Ping
Published: July 2014

This paper studied mechanical properties and microscopic changes of CRTSⅡtype CA mortar under the roles of the conditions of water immersion, acid soaking, wet and dry cycling, etc. The results show that: under the role of water immersion, the relative compressive strength decreases and elastic modulus decreases firstly and then increases with the extension of the time; under the role of acid soaking, the relative compressive strength and elastic modulus both decrease with the extension of the time; under the role of wet and dry cycling of short period, the relative compressive strength and elastic modulus both decrease with the increasing of cycling times, but CA mortar exists serious brittleness phenomenon under the role of wet and dry cycling of long period.
The Base Material Segregation Control Technology Research of Strong Interlocked Skeleton Dense Graded Aggregate
Authors: Yong Song
Published: July 2014

Compared with the traditional framework dense structure, strong embedded squeeze skeleton dense cement stabilized crushed stone has a stronger embedded squeeze force, the more excellent mechanical properties.This article briefly describes strong embedded squeeze the skeleton dense cement stabilized crushed stone grading design and mechanical properties, and strong embedded squeeze Framework Grading cement stabilized crushed stone in the construction of many materials Segregation. Through the experimental contrast research with traditional construction method, the new method almost eliminate the problems of mixture segregation, which can be used for reference in construction application.
The Study of Rheological Behavior about High-Modulus Modified Asphalt
Authors: Li Xu Dong
Published: July 2014

Research shows that rheological property of asphalt relates directly to pavement property. To get a grip on the influence of different factors on rheological property of high modulus asphalt, this paper makes a systematic study of different temperatures, loading frequency, strain 70# base asphalt and rheological property of high modulus asphalt by the method of DSR measurement, and compared their anti-fatigue performance. The experiment’s results shows that high-modules asphalt has a low sensitivity of temperature. Compare with the base asphalt, the high-modules modified asphalt’s G*/sinδ will have a slower decrease rapid under the condition of temperature increase. Both asphalt’s G*/sinδ would decrease with the decrease of load frequency, high-modules asphalt has a higher G*/sinδ than base asphalt especially at the high temperature and low frequency.
Discussion about Technical Problems in CBR Test
Authors: Zhao Wei Ping , Fan Cai Xia
Published: July 2014

This paper describes the importance of CBR test in the highway construction control. According to theoretical and practical experiments for many years, we put forward own opinions for technical problems occurring in the CBR test.
Numerical Simulation for the Seasonal Change of the Temperature and Humidity Field of Embankment in Moist Heat Areas
Authors: Que Yun , Chen Jia
Published: July 2014

Taking the meteorological data in Fuzhou area in 2011 as an example, this paper investigate the seasonal change of the temperature and humidity field of embankment in moist heat areas based on the finite difference technology programmed Moisture-heat coupled procedure. The results show that the highest temperature in the soil surface of embankment is near 40°C and the highest temperature gradient is up to 0.22°C/cm in summer. The lowest temperature is near 10°C and the highest temperature gradient is up to-0.21°C/cm in winter. Fluctuation range of the water content in the surface of the embankment (0cm~10cm) is between 3% and 20%, and fluctuation range of the water content of the shallow soil layer of embankment (10cm~50cm) is between 10% and 20%, and the water content in the deep layer of embankment (50cm~250cm) changes not apparently with season. If the temperature gradient of soil is 0°C/cm and the yearly fluctuation range of the water content of the embankment is 2%, the temperature and humidity of the embankment that can be affected by the climate of the Fuzhou area is in the depth of about 4.0m and 2.5m respectively.
Study on Water Stability Improvement of Granite Asphalt Mixture
Authors: Peng Zi Mao , Lin Meng Jie , Liu Qin Qin
Published: July 2014

Granite is a kind of acid stone which has the advantages of high strength, high wear resistance, etc. However, the poor adhesion between the granite and asphalt often fail to meet the corresponding design requirements, and the application of granite asphalt mixture is often affected. Based on the analysis of the comparative tests of common treatment methods in projects, the paper tried to explore the best countermeasures to improve the water stability of granite asphalt mixture, and provide guidance for engineering practice.
Management of the Investment Potential of Sustainable Development of the City
Authors: Stupishin Leonid , Sevrukova Larisa V. , Moshkevich Maria L
Published: July 2014

The term "sustainable development" appeared not so long ago. The growing concentration of industrial enterprises situated on urban areas, the uncontrolled increase in the scale of development, reduction the share of the recreational areas, replacing the areas of industrial purpose and new lines of transport and engineering service lines, has led to imbalance of technogenic and natural environment. The larger and more comfortable become the city, the more resources they need and the higher risk the natural of irreparable harm for the environment. This problem is connected, firstly, with the concentration of large numbers of people in one place, secondly, to human psychology, and ethics. It is hard to realize that the consumption of resources may be limited and you should think about the needs of future generations. In contrast to this tendency the idea about the need to rethink the traditional principles of urban development and forming the new basic principles of urban development, was put forward. It called the concept of sustainable development. This concept is based on a combination of economic, social and environmental criteria, which take into account the interests of future generations.
WJ-8 Rail Fastener of Ballastless Track Torque Test Research
Authors: Zeng Zhi Ping , Yuan Jia Yu , He Xian Feng , Liu Can , Zhu Kun Teng
Published: July 2014

WJ-8 fasteners are widely used in passenger dedicated line in China. Ballastless track structure is required due to the special line for passenger transport. Fasteners for fixed rail, adjust orbit deformation, etc. Therefore, study the changing rule of the fastener performance especially fastener torque for the design and maintenance of track structure has important theoretical and practical significance. Combined with the force of the track structure, this article through the fatigue test was carried out on the track structure. A simulated train bogie of loading. Research WJ-8 fastener torque as the change of fatigue loading two million times. To provide reference for design and maintenance of Ballastless track.
Research on Numerical Simulation of Roadway Deformation under the Influence of Mining
Authors: Xue Hua Jun , Xue Jun Long , Xu Xiao , Kong Jie , Liang Ming
Published: July 2014

The buried depth of gateroad in a mine mining, belongs to typical deep-seated roadway in soft strata. Due to the influence of mining, the deformation of roadway was serious. To ensure the stability of roadway surrounding rock during mining, roadway deformation damage law under the influence of mining was studied by FLAC3D numerical simulation. The results show that under the influenced of deep three “high” and one “disturbance”, the surface surrounding rock of roadway destroyed quickly, made a wide range of plastic failure zone. After the roadway excavation, the trend of deformation and deformation rate increased evidently under the influence of mining. And the closer distance of working face, the faster change trend. In 40m from working face, the deformation rate decreases relatively affected by periodic weighting. From working face 10m, the deformation rate is largest.
Evaluation and Utilization of Kuantan Clayey as Material Embankment for Roadway
Authors: Fauzi Achmad , Djauhari Zuraidah , Fauzi Usama Juniansyah
Published: July 2014

In general, clayey soil was used as material embankment for increasing road way level before road structure being constructed. Some types of clay are expansive soil, its have been contributing to pavement failures and subsequently causing increased annual maintenance expenditure of the road. The pavements design/redesign methods are found to be the primary cause of these failures. Thus, it is quite important to propose the Kuantan clay engineering properties chart for design criteria that can improve the embankment performance. Thus, it is quite important to investigate the Kuantan clay properties so that can improve the embankment performance.
This paper was evaluated and utilized of the engineering properties of Kuantan Clayey as material embankment for roadway. The research were conducted soil engineering properties, standard compaction, four days soaked California Bearing Ratio (CBR) test to ten clayey samples from various sites in Kuantan. The 4 days soaked CBR of clayey samples were prepared at optimum water content. The chemical element was investigated by Integrated Electron Microscope and Energy-Dispersive X-Ray Spectroscopy (SEM-EDS) and linear regression analysis were used to anlyzing relation among engineering properties variables.
An Analysis of the Impact of the Natural Void Radio of Cohesive Soil on the Calculation of the Backwater Height of the Highway Bridge
Authors: Dong Zhi Sheng
Published: July 2014

We discussed the impact of the natural void radio of cohesive soil on the calculation of the backwater height of the highway bridge. Firstly, we discussed the principle of the calculation of the backwater height and the method to calculate the backwater height of the highway bridge which was used by the design unit. Secondly, we analyzed the impact of natural void radio of cohesive soil by using a true project. We found that the method to calculate the backwater height which was used in the Hydrological Specifications for Survey and Design of Highway Engineering was not perfect. Finally, we should correct the parameter of the mean median grain which was decided by the natural void radio of cohesive soil.