bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation of Environmentally Friendly Microspheres Based on Starch
Authors: Miao Zong Cheng , Wang Fang , Deng Deng , Zhao Yu Zhen , Liang Peng Xia , Wang Lei
Published: June 2012

Starch microsphere is artificial starch derivative, can be synthesized by cross-linking reaction from crude starch and modified starch. In this study, a new type of crosslinked starch microspheres with degradability was prepared by crosslinking reaction of soluble starch with N, N'-methylenebisacrylamide (MBAA) in inverse suspension using K2S2O8-Na2SO3 as initiator. The microsphere size and size distribution of the starch microsphere were determined, and the structures were studied by SEM and FT-IR. And then, the starch microsphere was expected to been used in nasal drug delivery system, artery embolization, radiotherapy, immunoassay and so on.
The Research on the Development and Application of the Exterior Heat Insulation Material System in China
Authors: Cao Shuang Mei
Published: June 2012

This thesis analyzes the current situation of the heat insulation system of composite wall in China. Through comparison, it points out that heat insulation system is the trend of the development for heat preservation and energy saving, and meanwhile, it gives direction for further research to several different new type heat insulation systems.
Synthesis of Spherical Assembly Composed of MnO2 Nanoparticles Using Spent Zn-Mn Batteries
Authors: Yang Ming , Zhang Guan Liu , Li Peng Fei , Li Xiao Ying , Chen Cheng
Published: June 2012

Spherical assembly composed of MnO2 nanoparticles with an average diameter of 0.8-2.0 μm have been prepared using spent Zn-Mn batteries. The product was characterized by X-ray powder diffraction and scanning electron microscope. The adsorption performance of spherical assembly composed of MnO2 for methyl red was investigated. The adsorbent showed high efficiency for the removal of methyl red in water. The equilibrium of adsorption was achieved within 30 min. The isotherm adsorption data obeyed the Langmuir model, with a maximum adsorption capacity of 92.6 mg g-1.
The Current Situation of Pollution Control and Management of the Liao River Basin
Authors: Gao Yu Nan , Zhang Ping Ping , Fu Jin Xiang
Published: June 2012

The current situations of water environmental problem, water quality, water pollution prevention and control of the Liao River are analyzed and evaluated in this paper. The results show that a serious current situation of the Liao River water quality. The main pollution sources are: grave mountain forest vegetation destruction; serious soil and water loss; densely populated city; great pressure of sewage treatment; low coverage rate of the urban sewage pipe network; serious phenomenon for sewage straightly discharge and level of recycled water reuse. This paper aims at putting forward more attention on the work of basin pollution prevention and treatment; fundamentally relieve water source-oriented supply pressure.
The Possible Mechanisms of Cadmium Accumulation in Tagetes erecta L. under Macronutrient Deficiency
Authors: Feng Qian , Tai Pei Dong , Fu Sha Sha , Li Pei Jun , Zhang Yin Qiu
Published: June 2012

An experiment was conducted under hydroponic culture conditions to determine effects of nutrient deficiencies on cadmium (Cd) accumulation of Tagetes erecta L. and its possible mechanisms. Seedlings of similar size were pre-cultured in either N- or P- deprived nutrient solution for 7 days before exposure to 0.1 mg Cd L-1. The control plants had normal nutrient supply before and during Cd exposure. The plants were harveste after 7 days exposure to Cd. In N-deprived plants, Cd levels in roots, stems and roots were significantly reduced, which was consistent with a decrease of phytochelatins (PCs) in roots. Cd accumulation was the lowest in N-deficient plants, corresponding to substantial decreases in organic acids. In P-deprived plants, the obvious increase of Cd content in the root and stem and decrease of Cd content in the leaf accorded with increases of citric acid in the root and malic acid in the stem, supporting the suggestion that organic acids sequester soluble Cd and reduce Cd transport into the leaf.
Selection and Impact Mechanism of Washing Agents for Chromium Contaminated Building Waste
Authors: Wang Xing Run , Zhang Yan Xia , Shu Jian Min
Published: June 2012

With the building wastes contaminated by chromium in Haibei Chemical Plan in China as objects, it studied the contents of total Cr and Cr (Ⅵ) of different sizes, analyzed the effect of 6 different washing agents, discussed the removal mechanisms of 6 different washing agents for Cr in various forms, and finally selected applicable washing agent. As the results, particle size had little impact on the contents of total Cr and Cr (Ⅵ); after one washing with water, the removal rate of total Cr and Cr (Ⅵ) was 75% and 78%, respectively, and after the second washing with 6 agents, the removal rate of citric acid was the highest, above 90% for total Cr and above 99% for hexavalent chromium; the pH of building wastes were reduced by citric acid, and under acid condition, hexavalent chromium was reduced to trivalent chromium spontaneously by organic acid, which led to better removal rate of acid soluble Cr and reducible Cr; due to the complexing action, citric acid had best removal rate for oxidizable trivalent chromium. In conclusion, citric acid is the most applicable second washing agent for building wastes.
Energy-Saving Effect Evaluation Research of the Existing Residential Building in North China Area Based on Unascertained Measure Theory
Authors: Liu Da Jiang
Published: June 2012

Evaluating energy-saving effect plays an important role during the transformation on existing residential buildings for energy saving in cold area of north China. A relative index evaluation system of the energy efficiency in residential buildings is formed according to relevant energy-saving standards of the Ministry of Construction of China and the present situation in this area . Then a comprehensive evaluation model is built based on entropy and Unascertained Measure theory, and through an example to verify the applicability and feasibility of the model.
The Research of Pavement Damage Investigation Method Based on GPS Mode
Authors: Cheng Yong Chun , Bai Ri Hua
Published: June 2012

The quality of pavement damage investigation is a main factor that can affect the outcome of pavement performance evaluation. Thus, the investigation plays a key role in such evaluation. This research developed a new manual pavement damage investigation method by using modern measure technology and GPS positioning technology. According to this method, data has been saved in a computer and it can be used as pavement performance evaluation and design purpose directly. Therefore, the work efficiency will be improved dramatically by adopting this method.
Research on Test & Detection Data Report Format of Quality Control for Road Capital Projects
Authors: Gong Bai Yan , Lu Yu Hong , Bao Zuo Jun
Published: June 2012

The data report format and contents between the various laboratories differ in a thousand and one ways. The project quality information cannot be compared with the others. The quality control and management is severely affected. By studying capital and normal data report format, a set of data report format is drew up for site laboratory, which will standardize the representation of test & detect data, which will be benefit to control quality and file the engineering data. The goal of standardized management and scientific management will finally be achieved.
Research on Wind Energy Exploitation in Buildings Environment
Authors: Chen Hua Shu , Hu Guang Hong , Tu Ming Chiu
Published: June 2012

The flow fields in different monsoon periods of Shanghai Mengqing Garden were analyzed by computational fluid dynamic (CFD) simulation method. At the same time, the wind energy value in the Shanghai Mengqing Garden was also evaluated by CFD method. And the suggested wind turbines arrangement was proposed based on the wind field results. Safety of the buildings around the garden was analyzed by comparing the change of the wind pressure coefficient. At last, the results show that the wind field in urban building environment is available for wind energy exploitation.
Application of Context Sensitive Design for Meihe Freeway
Authors: Tao Xu
Published: June 2012

Increasing public interest and concern about transportation projects impacts on the national environment. Context Sensitive Design (CSD) is among the most significant concepts to emerge in highway project planning, design, and construction in recent years. However, CSD needs to be felt its way to effectual practice through a multitude of trials and misconceptions in China. The objective of paper is to summarize activities and finding in the CSD field during Meihe Freeway construction. Meihe Freeway is a successful CSD project. As a Meihe CSD team number, the author presents the CSD approach, addresses context sensitive solutions to CSD issues with flexible concepts. The paper illustrates issues and lessons learned from CSD alignment design with consideration of constrained budget, stakeholder values, ecological balance and environmental protection.
Silt Embankment Reinforced by Sleeve Valve Barrel Fracturing Grouting
Authors: Zhu Deng Yuan , Zhang Qing Tao
Published: June 2012

Abaqus finite element method and experimental study are carried out to research the silt embankment reinforced by sleeve valve barrel fracturing grouting method. Numerical model is determined based on the construction methods and mechanism, the calculation parameters are determined by experimental research. The displacement, force, and plastic are analyzed through comparative analysis of safety factor of attenuated embankment before and after reinforcement. The results show that the Reinforcement effect of sleeve valve barrel fracturing grouting method to stability attenuated roadbed is remarkable.
Research on Typical Structures of Asphalt Pavement in African Desert District
Authors: Kan Yu Heng , Qiu Xin , Lin Xia Yi , Luo Xiao Hua , Fu Yu Fei
Published: June 2012

Based on natural climate characteristics, road building conditions and traffic situations in African desert district, the problem of typical structure of asphalt pavement was studied by data investigation. Considering the principle of road structure and design, the optimal values of thickness and materials of structural layers were recommended. The research results establish a guideline for the design of asphalt pavement structures and provide a sufficient technology support to develop pavement infrastructures in African desert districts.
Study on Safety Measures for Construction of Foundation Pit close to Existing Railway Lines
Authors: Zhang Xiao Hui , Gong Quan Mei , Zhou Shun Hua
Published: June 2012

The finite-element method is adopted to analyze the impact of foundation pit construction on close-by railway lines, and related measures are studied to ensure the safety of railway operation during the pit construction. Eventually, cost-effective reinforcement method is recommended, therefor providing a reference for construction of similar foundation pit close to railway lines to determine reinforcement method. The conclusions indicate that under the existing structure design and basal reinforcement design of the foundation pit, the largest settlement of high-speed railway lines is 23.48mm, which does not meet the relative requirements. To reduce the settlement, three rows of high pressure jet grouting piles reinforcement outside the foundation pit and 0.15m away from waterproof curtain is recommended, and 18.0m is considered as the cost-effective reinforcement depth. With the effect of the proposed reinforcement measures, the largest settlement magnitude of high-speed railway subgrade is reduced by 25% to 14.0mm, which meets the relative requirement.
The Cascaded Utilization of Geothermal Resources
Authors: Li Qi Min
Published: June 2012

The geothermal resource is a clean complex resource, which can be changed into sustainable energy guided by the science theories. Demonstrating the heating engineering of a immigration village in Tianjin, the intention of this paper is to survey the sustainable utilization of geothermal resource meeting basic heating load, containing: (1) the dynamic prediction technologies of the production–reinjection of geothermal wells; (2) the design of inclined geothermal well; (3) the technologies of cascaded utilization of geothermal resource; and (4) the project appraisal. The results show geothermal resource is sustainable, and yield good economic returns and social benefits.
Study on the Major Factors Causing Road Slope Strong Deformation of the Shuiluo River Transmission Project in Sichuan
Authors: Hao Lian Cheng , Li Yu Sheng
Published: June 2012

The access road slope of Shuiluo River 500KV transmission project has a loose earth-rock structure which is in a continuous state of slight creep deformation in natural conditions. Road construction period was coincided with the rainy season. On August 18, 2011, after several days of continuous rain, dramatic deformation of engineering slope occurred in the road K0 +305 ~ K0 +345 segment. Gradually a sliding deformation body was formed that vertical length is about 80m, horizontal width is 30 ~ 50m, the front and back edge height difference is 50m, the total volume is about 6.0 million m3. Finite element numerical simulation and limit equilibrium calculation show that the overall deformation and local landslide collapse of the engineering slope was caused by two factors: paring slope and concentrated rainfall. On the one hand, the position of engineering slope was mainly in the anti-sliding section of the potential sliding body, slope excavation reduced the effective stabilizing force; On the other hand, construction was coincided with the period of concentrated rainfall, groundwater level raised significantly due to excess supply of rainfall (120mm/d), the state of slip soil changed from unsaturated to saturated. Slip soil strength decreased due to softening of water, and effective stress of sliding surface lowered due to the raise of pore water pressure, so slope stability was leaded to a sharp decrease.
The Comparison between Ecological Engineering Method and Conventional Engineering Method for the Mountain Area Roadway Design
Authors: Chen Tung Tsan , Lin Cheng Shih , Kuo Tsen I
Published: June 2012

This study shows that the traditional engineering method of mountain road construction has not only caused local ecological disturbance directly, but also through each of the stages of the preparation, such as material gathering, construction, continual maintenance, and the diminishing of recycling potential, whereas ecological engineering method, with safety as its main priority, could offer a better ecological condition for construction projects. Through studying the local environmental features and using the proper construction method, the most suitable, corresponding engineering method ought to be adopted. This research uses Analytic Hierarchy Process (AHP) with surveys completed by field experts. This research contains three dimensions: Road Characteristics, Roadside Characteristics, Biological Characteristics. Additionally, actual samples of practical application of ecological engineering would also be discussed to further prove the result and the accuracy of the AHP. Research shows that in the overall planning of a mountain road construction project, ecological engineering method serves to be the better approach.
The Application of the Improved TOPSIS Method in Bid Evaluation of Highway Construction
Authors: Meng Qing Ying , Zhang Cai Li , Song Ti , Li Ning Li
Published: June 2012

By analysising the disadvantages of the current bid evaluation methods used in highway project,the article builds up TOPSIS model based on coefficient of entropy to evaluating bidding units. First,the weight of each index is calculated by means of entropy weight coefficient method. Then it makes comprehensive assessment about bid evaluation with entropy weight coefficient method and TOPSIS method. The proposed method is applied to evaluating information system integration solutions and satisfactory results are abtained.
Comparative Study on Water Aging of Rubber Asphalt and TOR Rubber Asphat
Authors: Xiao Peng , Wu Mei Ping , Shi Shan Shan , Jiang Dean
Published: June 2012

Brookfield Viscometer, Dynamic Shear Rheometer (DSR) and Bending Beam Rheometer (BBR) are employed to analyze properties of rubber asphalt and TOR rubber asphalt after water aging. Through simulating, the influences of parameter changes of water on the performances of asphalts after aging were studied. The results show that the PH value and sodium chloride content of water affects the aging properties of asphalt, and as the parameter changes, the high temperature performance of TOR rubber asphalt are better than rubber asphalt. DSR and BBR tests reveal that the higher the acidity (or the lower PH value) and the sodium chloride content of water are, the more seriously rubber asphalt and TOR rubber asphalt age in water aging; the lower the temperature is, the larger the S value and the smaller the m value become, and the worse the low temperature performance and dissipation of temperature stress of rubber asphalt and TOR rubber asphalt get.
Analysis of Dynamic Deviator Stress of Reinfored Subgrade under Traffic Loading
Authors: Wang Shi Chuan
Published: June 2012

In order to study the influence of reinforcement on the distribution of dynamic deviator stress along the depth of subgrade, reinforced and unreinforced subgrade of graded-broken-stone-based asphalt concrete pavement under traffic loading was modeled by implicit dynamic FEM. Analytical results show that reinforcement can improve the vertical compressive stress distribution, and decrease shear stress transmitted to the surface of subgrade. The deviator stress on the upper part of reinforced subgrade is reduced distinctly, which is one of the key factors that can cause residual deformation. Therefore, reinforcement can restrain the development of residual deformation of subgrade induced by traffic loading.
Study on Shearing Stress of Asphalt Surface on Lean Concrete Base
Authors: Suo Li Jun
Published: June 2012

In order to study the shearing stress of asphalt surface on lean concrete base, first of all, three–dimension finite element model of the asphalt pavement is established. The main objectives of the paper are investigated. One is calculation for shearing stress of asphalt surface in transverse contraction joint of lean concrete base, and the other is analysis for relationship between load stress of asphalt surface and parameters, such as thickness, modulus. The results show that maximum shearing stress, which is caused by load, is evident in asphalt surface which is located in transverse contraction joint of lean concrete base of asphalt pavement. Maximum shearing stress decrease, decrease, decrease and increase respectively with increase of the surface’s modulus, the surface’s thickness, base’s thickness and ratio of base’s modulus to foundation’s modulus.
Research on the Dynamic Characteristic of the Bogie in Dynamic Track Stabilizer under the Excitation of the Track Irregularities
Authors: Wang Li Hua , Liu Guang Wei , Huang An Ning , Huang Ya Yu
Published: June 2012

With the large-scale speed-up of the railway, the dynamic track stabilizer will play an important role on the track overhauling and railroading of new line in our country. Bogie is one of the major critical components of the dynamic track stabilizer; its vibrating characteristic will affect the vibrating characteristic of the dynamic track stabilizer directly. The method of numerical simulate was used, based on the spectral density of the track irregularities, the time domain loads of the track irregularities were gained. Then the vibrating characteristics of the dynamic track stabilizer bogie under the excitation of the track irregularities were analyzed on the bases of the ANSYS/LS-DYNA. And the lateral, dilation, ups and downs, nod, swing and anti-rolling vibrating characteristics of the bogie on the six degree of freedom were obtained. The analysis results of this paper will provide foundation for the research on the stationarity and security of the dynamic track stabilizer.
Discussion of Goaf Critical Depth Calculation Methods under Freeway
Authors: Jin Ai Bing , Lei Xiao Juan , Sun Jin Hai
Published: June 2012

Goaf critical depth is used to describe the influence of buried goaf on upper structures, that is to say, if the goaf burial depth is less than the goaf critical depth, the goaf must be emphatically treated, and if the burial depth is greater than the critical depth, but less than one and half of the critical depth, the goaf also need to be treated, and if the burial depth is greater than one and half of the critical depth, the goaf need no treatment. Nowadays, mechanic balance method has been using to calculate the goaf critical depth, which considers the upper rock as the loose structure, and the destroy plane is vertical. Based on the discussion of critical depth calculation methods, the critical depth calculation method thinking of the cohesive strength of the part upper rock was put toward. The method was applied to the goaf treatment engineering of Chengtang Freeway of Hebei province, and was proved by the monitor results. The critical depth calculation method can reduce the engineering quantity of goaf treatment.
Numerical Simulation Modeling of GPR on Road Disease
Authors: Zhai Bo , Gong Zhi Min
Published: June 2012

Numerical simulation of ground penetrating radar is an effective way of analyzing and studying high frequency electromagnetic wave propagation rules in the underground media. In this paper, Finite-Difference Time-Domain (FDTD) method is used for numerical simulation to form radar records reflection profile about road disease such as loose disease. The purpose is to study and sum up the radar wave propagation rules and reflection signal characters in this diseases media, in order to provide reliable theory support for road maintenance and evaluation.
Experimental Study on Solar Assisted Heat-Pump Water Heating System
Authors: Dai Yuan De , Yu Na
Published: June 2012

Solar assisted heat-pump water heating system combines the advantages of Solar Utilization Technology and heat pump water heating technology, it is a new water heating system with energy conservation and environmental protection. Under the premise of putting up experimental system, some performance parameters have been tested, such as the heating rate, the heat collecting efficiency of the system and the influence of indoor air temperature on the outlet water temperature and the energy efficiency ratio of the water heating system. The experimental results show that solar assisted heat-pump water heating system has the advantages of high energy efficiency ratio, shorter consuming time than traditional solar water heating system when heating water, and it can be concluded that this new water heating system should be applied in the future.
Construction of Adjustment Model of Traffic Volume Forecast in The Latter Part of Expressway Operating
Authors: Li Ming Shun , Zhu Zuo Hui
Published: June 2012

This paper focuses on the problem of serious deviation about predicted traffic flow on the feasibility study stage of expressway,puts forward an idea to compare and analyse the predicted traffic flow in feasibility study stage and the actual traffic after project operation,introducts least square method model, and finds out the linear relationship between them, thus predicts traffic flow of expressway operation. Finally, the calculation is made by combining with concrete expressway project,which proves that this method is usefull to improving the accuracy of the traffic flow forecast.
The Experimental Research about Vibration Compacting Load Transfer Spread in Roadbed
Authors: Huang Bao Tao , Liu Ding , Wang Fang , Li Jie
Published: June 2012

In this paper, the caustics method was used to explore the distribution of contact forces inside a packing of discrete square cells submitted to a compressive load. The self making subroutine 3-D generation algorithm about irregular particle generation and particle contact interface generation were adopted, and irregular particles were randomly generated in the designated categories with this algorithm. The vibration compacting load diffuse and transfer law with different media dense state were analyzed. The test results show that the vibration load caused the effective compaction region was changed vertical long axis oval into the level long axis oval. The study provides an idea to research and employs a new over-loading road which better repels tired retrogression under the dynamic load.
The Method to Determine the Optimal La3+ Doping in DSSC Electrode for BIPV
Authors: Tian Han Min , Chen Ai Hua , Duan Wen Feng , Tian Feng Lan
Published: June 2012

Dye-Sensitized Solar Cell (DSSC) is noticed to be proper for BIPV for cheaper, more transparent, and able to realizevarious colored. Researchers constantly strive to improve the power conversion efficiency of DSSCs for this cell’s practicability by doping TiO2Subscript text with inorganic substance, metal ions, or processed with organic, as TiO2 electrode is the core of DSSC to generate photovoltage effection. Here reported a method to determine the optimal La3+ doping proportion of TiO2 by the equivalent circuit parameters estimated corresponds to the reported experment I-V curve. Thus, the concentration of La3+ doped TiO2 thin films of 0.5% of DSSC can get the most out of the photoelectric conversion efficiency.
Load Distribution Form of Soil between Piles in Geosynthetic Reinforced Pile-Supported Embankment
Authors: Jia Yu , Yang Long Cai
Published: June 2012

The strict control standards for post-construction settlement of high-speed railway require high accuracy of settlement calculation. Harmonizing the contradiction that settlement calculation theory lags far behind the engineering practice, the computational method of additional stress of foundation urgently needs improvement. For Geosynthetic Reinforced Pile-Supported (GRPS) embankment, as the stress caused by the load acting on soil between piles is an essential part of the whole, the computed results of additional stress of foundation largely depend on the load magnitude and load distribution form of soil between piles. Starting with the mechanical behavior of GRPS embankment, this paper analyzes the classic assumptions of soil arch form and their computation theory of load acting on soil between piles, and then deduces the distribution function of parabolic load, which can provide basis for further research on calculating the additional stress.
Research and Application on the Urban Public Transport Route Accounting System
Authors: Han Zhi Ke , Pan Quan , Yang Bo Wen
Published: June 2012

Bus route accounting system with basic accounting methods and financial accounting principles of double-entry bookkeeping, the use of passenger daily, real-time billing, supplies, human resources systems to provide real-time data to a single line of commercial vehicles and accounting unit of revenue, costs , costs of collection, and ultimately accurate reflection of Busroutes, the fleet of the company's production operations financial condition.
Bike Sharing System in Foshan: Planning & Practice
Authors: Zeng Xiao Ming , Zhang Yu Hong
Published: June 2012

Foshan bike sharing system has been planed in order to optimize the urban transportation structure, alleviate traffic jam and parking difficulty ,deal with the environmental pollution and so on,as well as to build a sustainable green traffic system.Through analysing the actual situation of the development of the bike sharing in Chancheng, Foshan,we have given the corresponding public bicycle station, bicycle lanes and operation management, and other aspects of the planning scheme.
Effects of the Visibility on Traffic Flow
Authors: Bai Ke Zhao , Yang Li , Huang Jian , Zheng Rong Sen , Kuang Hua
Published: June 2012

Based on the NaSch model, an extended cellular automaton model is proposed to simulate traffic flow by considering the effects of visibility. Under the open boundary condition, the influences of the injection probability, disappearance probability and visibility are discussed. The simulation results show that the injection probability and disappearance probability within a certain range have an important effect on the flux, density and velocity. And traffic jams often occur in poor visibility areas, which can become a road bottleneck. Furthermore, in order to effectively decrease the occurrence of traffic jams, the injection probability and disappearance probability should be set up reasonably.
Simulation and Experiment for Highway Toll Station
Authors: Kuang Xian Yan , Zhou Sha , Xu Lun Hui
Published: June 2012

Toll station is the bottleneck of the highway. The simulation method is effective to analyze the traffic characteristics of highway toll station. The microscopic simulation model and the structure of toll station are built. The vehicle generation model, car-following model based on minimum safety distance, and the vehicle driving track selection model are analyzed. The simulation system is developed using VC++. The experiments with a dynamic adjustment method are studied using the simulation system, and the service level and vehicle passage rate are analyzed. The results show that the simulation system is suited to the real traffic characteristics and is an effective tool for highway toll station traffic analysis.
The Study on Force Behavior of Concrete Filled Steel Tube Lattice Wind Turbine Tower with Three Limb Columns
Authors: Wen Yang
Published: June 2012

This paper refers to currently the 1.5MW cone tube type wind-driven generator tower, design the model of the concrete-filled steel tube wind turbine tower with three limb columns, and research on the force performance, such as the change of internal force, the process of failure, hysteretic behavior, bearing capacity, ductility and energy dissipation capacity by the pseudo-static experiment on the scale model of wind turbine tower. The study shows that the P- hysteretic curve of lattice concrete-filled steel tube wind-driven generator tower with three limb columns is asymmetric, relatively full “spindle” and the phenomenon of “knead shrink” is not obvious, which account for it has good force behavior and energy dissipation capacity. This kind of tower structure, of which the reverse bearing capacity is greater than the positive, and the reverse ductility coefficient is less than the positive, indicates that it’s reverse plastic deformation ability of the tower structure is weaker than it’s positive.
The Classified Management of Transport of Dangerous Goods Section
Authors: Feng Shu Min , Yin Guo Qiang
Published: June 2012

The classified management of transport of dangerous goods section, not only can reduce the possibility of transport of dangerous goods accident, but also reduce the severity of the consequences of the accident, has a more far-reaching significance to the security of the urban transport of dangerous goods. Fuzzy clustering method is applied to the classified management of transport of dangerous goods section, according to the different sections of the length, risk, as well as dangerous goods traffic, which sections of classification based on fuzzy clustering analysis method, an example of Pingxiang City of Jiangxi is given to illustrate the calculation process of the method. The category management and the corresponding management strategies is proposed suitable for transport of dangerous goods according to the classification results, and provide a viable basis for the government sector. Category management of transport of dangerous goods section, enabling the transport of dangerous goods more standardized, laid the foundation for the development of urban transport of dangerous goods industry.
Urban Mass Transit Network Project Selection Using the Fuzzy Expandable Engineering Optimization Model
Authors: Li Qian , Shen Liang Feng
Published: June 2012

Abstract. Mass transit line network’s option is a fuzzy optimization problem. Its line network evaluation is multi-objective and multi-hierarchy and the evaluation subsystems are incompatible. First, considering the urban development coordination, construction implementation, rationality of urban mass transit line network structure and comprehensive effect, researches established the appraisal index system of urban mass transit network using an assistant decision-making tool of system-analysis. Second, the study established extension and fuzzy optimization model with a vague idea of fuzzy mathematics, the knowledge of extenics and TOPSIS, explored the fuzzy and incompatibility issues on urban mass transit line network evaluation. The study introduced negotiation theory into weight construction, expanded single AHP to multi-experts weighting methods and combined it with entropy theory to form a new weight construction method. Last, as a validation, Changsha urban mass transit line network were evaluated and verified the feasibility and practicality of the model and method mentioned above.
Scenario Analysis of City Residential Electricity Consumption Based on the Time-Series Forecast - Taking Quanzhou City as an Example
Authors: Hou Xiang Chao , Zhu Lu Jie
Published: June 2012

In this paper, the development scenarios of electricity consumption of city residents living were analyzed by using the prediction method of time-series smoothing. The simulation calculation to the future development scenarios of electricity consumption forecasts the electricity consumption values of residential building in this case area from 2010 to 2050. The conclusion, that controlling living area per person is most effective measure, has reference significance for the future residential building energy efficiency work.
The Research of Emergency Rescue Sites Layout During the Highway Reconstruction
Authors: Ni Long He , Zuo Jun Zhong , Lv Hua Bing
Published: June 2012

To determine the service distance L in limited rescue time of emergency rescue site，main factors influence the speed of emergency rescue vehicle during the time of highway reconstruction is analyzed，and using multi-level fuzzy evaluation method to obtain comprehensive speed. Based on the considering of arriving accident field in the minimum time first，emergency rescue sites are arranged on black-spot. Then the distance between adjacent emergency rescue sites are compared with service distance L，Amend the possible situation of the spares or dense placement, and take the service facility such us service area and toll station into consideration, then optimize the layout scheme. Finally take the layout of emergency rescue sites of the Jingla Expressway reconstruction project as an example to analyze.
The Research of New City Road Network Level Structure Based on Supply and Demand Balance
Authors: Chen Kun , Wang Jian Jun , Han Fei , Qiu Li Ping
Published: June 2012

In recent years, as the rapid development of society and local economy, the urbanization level increases, many city carrying capacity approaching the limit, so the new city district construction become the new growing point of city. In the new city district construction process, the level of road construction mileage most can reference to related standards, but to determine the level of road network structure often lack of scientific and effective way. This paper, based on the transport turnover, supply and demand balance as the basic principle, utilize the balance between the infrastructure of the new urban district in future and transportation demand to establish model to work out a new city road network level structure, not pursue supply capacity absolute terms maximization, but with the actual matching, establish the optimal way level structure.
The Investigation and Analysis of Hangzhou Transportation Status
Authors: Huang Bin , Shen Ming Xia
Published: June 2012

In our country, the number of cars is increasing faster than that of the road, and it becomes harder to satisfy the traffic needs. The traffic congestion has become the bottleneck, which restricts the development of the medium-sized and large cities in the country. In recent years, the traffic conflict in Hangzhou is increasingly prominent with the rapid economic development. In order to solve the traffic problems in Hangzhou, the paper made a deep investigation into Hangzhou’s current traffic status and sums up causes of and measures in solving problems in the traffic of Hangzhou.
The Measures of Realizing Urban Public Bicycle System
Authors: Zhao Xiao Ju , Li Jian Yi , Li Li Feng
Published: June 2012

In this paper, the urban public bicycle traffic was studied and the measures of realizing urban public bicycle system based on a new traffic idea of green traffic was put forward.
Effect of Toll Rate for Toll-by-Weight Expressway on Vehicle Volume
Authors: Wei Lian Yu , Hou Jue , Chen Liang , Zhang Jin Bang
Published: June 2012

First of all, the influence of toll-by-weight road traffic and truck models was analyzed, and the flow which choose the expressway and ordinary road was obtained by the separation model ; then the rate influence on different traffic flow types was analyzed by applying sensitivity analysis; finally, developed the empirical analysis of Hebei section of Expressway Jing-Hu, and the proposal for highway management department whose aims at balance the traffic flow in road net , stabilize the fees amount of management department and increase the expressway users benefit to draw up the reasonable rate based on the relationship above has been raised.
Dynamic Analysis of Trebling-Pivot Vehicle on Undulate Pavement
Authors: Cao Yuan Wen , Yi Yan Li , Qin Min
Published: June 2012

Model of heavy truck was built with the ADAMS dynamics simulation software. Dynamic loads between the wheels and the pavement with different loads and different speeds and different road surfaces were analyzed comparatively. Results indicate that the dynamic load between the wheels and the pavement will be increased with the speed increase; the dynamic loads between the wheels and the pavement will be increased with the pavement amplitude increase; Under the same conditions, the dynamic load of fully loaded vehicle was larger than that of no-load vehicle.
A Case Study on Hangzhou’s Public Bicycle System in Relieving Pressure on Road Transport
Authors: Huang Bin , Shen Ming Xia
Published: June 2012

Abstract. The global economic development facilitates the process of urbanization, during which more private cars are used, resulting in traffic jams and also more air pollution. It is important to provide an energy-saving public transport means in order to relieve pressure on road transport, reduce emission, and even to offer a new alternative of transport to non-local tourists in their traveling, and public bicycles are such a choice. This article investigates into the public bicycle system in Hangzhou, an extension of the existing public transport, analyzes current utilization of public bicycles, problems we have already encountered, well as suggestions and countermeasures for further improvement, in the hope of providing a good example to other cities in the world in their public transport development
Analysis on the Old and New Reinforced Concrete Beam Shrinkage and Creep Difference Effect of Broadened Bridge
Authors: Meng Jiang , Yang Xiao Dong
Published: June 2012

In order to analyze the shrinkage, creep effect of the old and new concrete beam after small and medium-sized span concrete slab bridge was broadened, slab beam was taken as an example, and the vertical stress of the old and new beam caused by beam body shrinkage and creep effect was analyzed, and the influence of the different construction conditions on the vertical stress of cement slab was compared by making use of different calculation methods.At the same time,the redistribution of the stress at the juncture caused by the different shrinkage, creep of the new and old concrete beams because of the time difference was analyzed. The analysis results show that the longitudinatensile stress on the new beam caused by shrinkage and creep may lead to longitudinal crack of new beams.
Theoretical and FEM Research on Inelastic Displacement of Assembled Truss Bridge with Cable Reinforcement
Authors: Zhou Yin Zhi , Jiang Ke Bin , Ding Yong , Yang Jian Kui
Published: June 2012

This paper presents theoretical and finite element investigations on inelastic displacement of assembled truss bridge with cable reinforcement (hereinafter referred to as ATCR). A method based on the Principle of virtual work for the determination of the inelastic displacement of ATCR is proposed. Finite element analysis was conducted on the specimen models using the ANSYS program, in order to obtain the inelastic displacement of ATCR and to compare with theoretical results. This study focuses on Bailey bridge under the self-weight load and prestressing force on cable. This paper analyzes various specimens to obtain inelastic displacement in different cases. The approximations of a relation between the inelastic displacement and prestressing force on cable are found. It can be seen that the method in this paper can both calculate the inelastic displacement of traditional truss and prestressed truss (ATCR). Based on both the theoretical and the finite element results, it can be concluded that the relation curve between inelastic displacement and prestressing force is stepwise.
Identification of Significant Failure Modes under Traffic-Load for an Arch Bridge System
Authors: Gao Xin , Wang Lei , Qin Wei Hang
Published: June 2012

An important part of system reliability estimation is to identify the subset of significant failure modes. A new identification method was proposed for the combination of failure modes of a concrete filled steel tubular arch bridge. The innovative method was based on critical strength branch and bound algorithm and implemented in the combination with the finite element package ANSYS and the MATLAB procedure. The results reveal various combinations of failure modes in significantly reduced time and efforts comparing to the previous conventional method. Additionally, the suggested method can be used for the verification of the system reliability with more specific predictions of the failure mode.
The New Analytical Theory of Distortion of Thick-Walled Concrete Box Girder Bridge
Authors: Xu Xun , Ye Hua Wen , Qiang Shi Zhong
Published: June 2012

Directed toward the feature of distortion of concrete box girder bridge, the layered approach of analyzing distortion is put forward, displacement model and geometric equation are established by using the generalized coordinates principle, and the formula of distortion shear stress is derived, and then a analytical theory of distortion of thick-walled box girder is established based on the mixed variational principle. The numerical experiment indicate that it cannot be neglected that thick-walled effect of distortion of concrete box girder bridge and the predicted results by the new theory are accurate.
Discussion on Curve Prestressed Reinforcement Simulation in FEA
Authors: Huang Wen Xiong , Tan Li Ying , Yang Hong Yin , Zhang Hai Long
Published: June 2012

Considering the slender property, the reinforcement is always simulated by linear element in conventional FEA of concrete structures. But to the curve prestressed reinforcement, it will lead to the problem that the calculated result of local stress distribution is greatly affected by element size, because of the tectonic stress concentration by the coupling between the linear element and body element. To eliminate the harmful effect, the curve prestressed reinforcement can be simulated by body element. The result shows that it will solve the problem thoroughly, and the calculated result is truthful and reliable. Certainly, as a kind of slender component, there are some key point must be recognized when the curve prestressed reinforcement is simulated by body element. To reflect the mechanical properties of prestressed reinforcement and solve the key challenges of modeling, some key techniques of modeling and some special notices about element property settings are discussed detailedly in this paper.
Reinforcement Calculated Method Based on Disease Model of DongFu Bridge
Authors: Liu Peng Jun
Published: June 2012

On the basis of the static and dynamic testing of the bridge, the original structure model and the model based on stiffness reduction of Dongfu Bridge were analyzed and calculated with the finite element method. The main problem that the anti-shear area of the section in the middle pivot position is not enough is found. On the basis of combination of the passive and active reinforcement styles, a reasonable and feasible reinforcement plan on the girder beam of the main bridge is raised. These conclusions have an important reference value on the bridge reinforcement.
Research and Discussion on Energy-Saving of Existing Buildings in Northwest of Liaoning Province
Authors: Wu Ya Jun , Ma Yu
Published: June 2012

Abstract. In view of the status of existing buildings in northwest of Liaoning, most of which are lack of energy-saving practices and appear poor comfort, this paper starts from the energy saving concept, aims at figuring out the energy saving measures for cold regions, such as northwest of Liaoning province. The research includes analyzing energy-saving methods, steps and initiatives. Based on these, this paper also proposes specific technical practices to overcome the shortcomings of the existing buildings on energy conservation, and gives advices on how to reduce energy consumption and improve the quality of people’s living and working environment.
A Rocks Based Visualization Cluster Platform Design and Application for Bridge Health Monitoring
Authors: Chen Feng , Liu Ming , Han Xiao Ying , Chen Wei
Published: June 2012

As high performance computing (HPC) becomes a part of the scientific computing landscape, visualizing HPC has become a critical field of its own. This paper describes a visualization cluster solution developed for bridge health monitoring system. First, LCD display, computer with NVIDIA graphic cards, 1G switch and 10G switch are used to build hardware platform; Secondly, Linux operation system, Rocks management software, CGLX middle software is used to display multi-media and 3D data; Finally, OpenSenceGraph 3D graphics engine is used to write high-performance parallel 3D programs. This approach can be used not only for parallel computing, but also for parallel 3D modeling and display. Some application result on bridge health monitoring is given in the end.
Response Analysis of Bridge across Seismic Fault Zone
Authors: Li Qi Zhen , Li Hong Quan , Zhang Zhi Qian
Published: June 2012

Through simulating the happening location of the fault zone, the structure model is duly simplified, analysing the forced deformation law of the bridge surface with different fault zone position. Because of statically indeterminate structure, continuous beam shall be produced larger additional moment, shear force and torque as a result of displacement in bridge pier, additional stress will be increased with the the increasement of fault zone displacement, especially for the top surface parts of bridge pier. Hence, the corresponding position of the structure and construction measures for reinforcement should strengthened, the overall rigidity of the structure should be improved, and based on the study of the bridge across the fault zone is a simplified, and the actual stress process may be more complex, the investigation on geological condition must be clear, and avoid the bridge structure crossing fault zone.