bluuebunny/crossref_metadata_2025 huggingface dataset:
A Design Principle Analysis of Harmonious City Bus Station
Authors: Li Jie
Published: December 2012

By designing scientific, efficient, safe and comfortable bus stations, the design of harmonious bus station is actually coordinating and harmonizing the relationship among people, bus, station and environment. This paper aims to investigate and analyze the bus station by the concept of harmony, and finds the basis of design and summarizes the principle of harmonious bus station design.
An Optimized Design Scheme for Roundabout Traffic Management
Authors: Xia Qian , Shi Lei
Published: December 2012

Roundabouts have since become increasingly common. Statistically, roundabouts are safer for drivers and pedestrians than both traffic circles and traditional intersections. However, in the actual life, now roundabout faces the challenge that the traffic flow exceeds the limit. In order to decrease the construction cost and maximize the benefits, in accordance with the analysis of the roundabout capacity and traffic signal control, the author put forward a self-suitable red light adjustment scheme based on BP neural network. At last, integrating the roundabout traffic management system actually investigated, selecting the data to do the test to prove the validity of the mentioned scheme.
AHP-Based Fuzzy Evaluation System of Municipal Transportation Efficiency
Authors: Zhang Jue , Liu Hong Li
Published: December 2012

The evaluation of the municipal transportation efficiency is an issue that cannot be wholly and sufficiently analyzed quantitatively, for it, involves many factors, some of which are just beyond quantitative analysis. Based on AHP (Analytical Hierarchy Process), the author suggests an evaluation index system in which different weight is allocated to each index according to its effect on municipal transportation. Combining AHP and different weight allocation, the present paper proposes a fuzzy evaluation (appraisal) system of municipal transportation efficiency and presents an example analysis targeting at the removal and settlement of the barriers and problems that hamper the improvement of city transportation efficiency.
Transit Station Service Level Research Based on Fuzzy Comprehensive Evaluation
Authors: Wang Shu Wei , Sun Li Shan , Rong Jian , Yang Zi Fan
Published: December 2012

The Beijing Subway system carries about 8 million passengers per day in 2012, and the congestions caused by large passenger volume has become a major issue in transit stations especially transfer ones. In order to suppress the congestion to an acceptable level, an indicator reflecting transit station service level is urgently needed. However, previous researches mainly focus on the passenger density of certain areas, such as stairs and walking corridors. This paper aims to propose a composite indicator reflecting the service level of a whole transit station. Filed investigation of several transfer stations was conducted during peak commuting period, in order to find out the usual congestion points of each passenger flow line. According to investigation results, Platform stair, Exit AGM (Automatic Gate Machine), Platform and Corridor entrance were chosen as key nodes to reflect transit station service level. And the weight of each key node was decided by the average passenger density ratio, based on simulation experiment of SHD station. Finally, the service level of SHD station was evaluated with fuzzy comprehensive evaluation.
Research on the Improvement Schemes of Irregular Intersection
Authors: Zhang Wen Bin , Wang Bo , Genesis Harrod
Published: December 2012

In order to make the traffic flow more stability and smoothly at irregular intersection, the improvement schemes is researched on a typical irregular intersection, Hao valley intersection in Wuhan. Firstly, a field investigation is carried out for this intersection. Secondly, we carried on the optimization in many different ways, such as transportation demand management, traffic flow organization of regional, signal optimization, intersection Canalization and other optimizations. Finally, a microscopic traffic flow simulation software, VISSIM, is used to simulate the traffic situation before and after improvement. Results shows the improvement schemes effect is obviously, and the delay and conflicts substantially reduced. This research can provide a reference for similar intersection improvements.
Operation Organization at Urban Rail Transit Station under Large Passenger Flow
Authors: Tang Qiao Mei , Shen Li Ping , Tang Xian Yong
Published: December 2012

large passenger flow is a common condition of urban transit operation, and the station bears the pressure of large passenger flow directly. This paper analyzes the reason for the appearance of large passenger flow and the characteristics of it, discusses the principles and methods that the station can apply under large passenger flow combined with the passenger’s transport process and the operation process.
Aerodynamic Simulation of the Air Flow beneath the High Speed Train
Authors: Liu Ye Bo , Liu Zhi Ming
Published: December 2012

Numerical simulations were carried out to investigate the air flow and pressure distributions beneath high speed trains, based on the three-dimensional Reynolds-averaged Navier-Stokes equations with the SST k-ω two-equation turbulence model. The simulation scenarios were of the high speed train, the CRH2, running in the open air at four different speeds: 200km/h, 250km/h, 300km/h and 350km/h. The results show that, the highest area of pressure is located at the front underbody part of the train whist the pressure for rest of the train is relatively small. Increasing speed does not visibly increase the pressure coefficient, indicating that the pressure increases with the square of the operational speed.
Safe Speed in Bridge Area and Impact Determination for Pier
Authors: Fan Ning Yang , Liu Xiao Ping
Published: December 2012

The safe speed in bridge area and the security of the bridge’s structure is a technical and a management issue; it should pay highly attention in terms of design, maintenance, and operation and management. The point of the shipping departments and the bridge designing departments for reference in two distinguished aspects are discussed when it comes into the problems of the speed in bridge area. The conception of “safe speed in bridge area” is based on current impact determination for pier and the study of safe speed at home and abroad. The ship adopted the safe shipping speed in bridge area and can meet the requirements of the safe navigation demanded by the shipping departments, and its velocity value can provide reference for the bridge designing in terms of anti-collision. The practical experiment on super large bridge in Changzhutan intercity railway and the ship model test on navigation show that the presentation of safe speed in bridge area ships was a relatively scientific method, and the presentation can provide new idea on solving contradiction between the construction of the bridge and the navigation part.
Design and Calculation of Double Buoys Mooring System in Estuary of Yalu River
Authors: Shi Guo You , Yang Jia Xuan , Li Wei Feng
Published: December 2012

In order to design a double buoys mooring system in the estuary of Yalu River for loading work of 40,000 tons of bulk cargo ship, the article mainly based on the practicality of the meteorological condition of this sea area and the data of the vessel as well as the national criterion, do some calculations of wind force, current force, wave force as well as the total force on the ship, with the calculation result to make a designation of double mooring buoy system, decide the size of the mooring buoy, the size and length of the chain, the size and the depth of the Deadman. The construction according to the designation has a good effect; the method of calculation and the designation are proved useful.
Simulation Analysis of W-Beam and Highway Bus Based on ADAMS
Authors: Zhang Yang , Li Wen Yong , Zhu Yong Cun
Published: December 2012

In order to meet the highway safety requirements of the bus under different speeds, the model of highway bus and W-beam were established in UG software and the collision dynamics simulation was analyzed in ADAMS software. During a number of simulation experiments, the impact force and the lateral deformation displacements would be done through the W-beam was collided by the bus in different speeds. The result was proven to meet the regulatory requirements of the evaluation specification for highway safety barriers. The result show that: semi-rigid guardrail can be better deformation and guiding effect when the speed of bus was lower than 80 km/h, but when the speed was higher than 80 km/h, the collision avoidance effect of guardrail was poor and the bus was easy to cross the guardrail to case secondary accident.
Reliability Analysis of Vehicle Equipment Based on Bayesian Method
Authors: Tang Yan Feng , Li Hui Mei , Liu Xiang Kai , Liu Shao Qing
Published: December 2012

Bayesian method was introduced and leaded into the vehicle fault data processing. The parameter estimation and the selection of the optimal distribution model based on Bayesian method were studied, and an example was given. The references are provided for the application of Bayesian method in the large complicated systems, such as vehicle equipments.
Dynamic Modeling of the Torsional Vibration of the Slewing Mechanism of a Hydraulic Excavator
Authors: Yang Xu Juan , Wu Zong Hua , Li Zhao Jun , Cai Gan Wei
Published: December 2012

A torsional vibration model of the slewing mechanism of a hydraulic excavator is developed to predict its free vibration characteristics with consideration of many fundamental factors, such as the mesh stiffness of gear pairs, the coupling relationship of a two stage planetary gear trains and the variety of moment of inertia of the input end caused by the motion of work equipment. The natural frequencies are solved using the corresponding eigenvalue problem. Taking the moment of inertia of the input end for example to illustrate the relationship between the natural frequencies of the slewing mechanism and its parameters, based on the simulation results, just the first order frequency varies significantly with the moment of inertia of the input end of the slewing mechanism.
Structural Optimization of a Heavy-Duty Truck Based on a Virtual Prototype Model
Authors: Li Shao Hua , Jiang Chun Sheng , Wu Jin Yi
Published: December 2012

A virtual prototype whole-body model was built for a tri-axial heavy-duty truck. Selecting the lateral acceleration, roll angle and yaw rate as the evaluation index, the sensitivity of wheelbase and track was analyzed and the coordinates of hard points were optimized. The Hunting behaviors of the optimized vehicle were discussed and compared with that of the original vehicle. It is shown that the roll angle, yaw rate and vertical acceleration of vehicle body and the vertical acceleration at the seat are reduced greatly after optimization. Thus the vehicle structural optimization improves both handling stability and ride comfort.
The Simulation for Automobile Power Performance and Fuel Economy
Authors: Chen Wen
Published: December 2012

The power performance and the fuel economy are both the important indexes of the automobile. To designing a certain vehicle, when the total weight, distribution of the load and the tyres are specified, in traditional ways, it needs to do a lot of the dynamic calculation work and numerous experiments to get the parameters of proper engine and power train. This paper, Based on mathematical model, the simulation for automobile power performance and economy is designed. The calculation on actual vehicle is taken with this software and calculated values are in good agreement with the practical data. The analysis of influence of some chief factors on automobile power performance and fuel economy is carried out, which can provide the reference guide for automobile design.
A Numerical Method of the Electromagnetic Force for the Electromagnetic Track Brake
Authors: Lu Sen Lin , Gu Yu Feng , Chen Shian , Wang Sheng
Published: December 2012

The object is to propose an accurate and succinct numerical method to compute the electromagnetic force between the electromagnetic track brake and track. The model of the magnetic circuit with variable air-gap permeance is established and the electromagnetic force is obtained by using a method of magnetic flux tubes. The electromagnetic force is compared with that from the finite element method using Ansoft software. The comparison results show that the numerical method is capable of achieving precise and reliable electromagnetic force quickly.
Brake Performance Testing and Analyzing of Light Commercial Vehicle
Authors: Xu An , Qiao Xiang Ming
Published: December 2012

In order to determine the statistical characteristics and distributive regularity of a light commercial vehicle’s braking performance, and further establish corresponding statistical models of vehicle braking performance, large sample testing and statistical analyzing of 220 vehicle’s braking performance are carried out with brake tester bed, as well as 6 braking performance’s optimal fitting distributions and the distributive parameters are obtained also. By means of the statistical characteristics and distributive regularity of the brake performance, the statistical models of the 6 braking performance are established, the model included the probability density function and the distributive function. The calculating results show that in all established models, the largest calculating error absolute value is 6.24%, and the smallest only 0.23%. This research will play an important guiding significance and role to truly evaluating vehicle brake safety performance, improving vehicle brake system design, manufacture, maintenance and repair, as well as revising the relevant limits of vehicle brake safety laws and regulations.
Preliminary Study on Maneuvering Motion Pattern of Unmanned Composite Trimaran Ship Model
Authors: Cui Jian , Yang Song Lin , Xu Hai Tong
Published: December 2012

The composite trimaran is characterized by adding the hydrofoils with different aspect ration in the main hull and sides of the conventional trimaran hull. Regarding the programmable automatic controller as the core, the paper designed the unmanned intelligent control system of the composite trimaran ship model, used VB.NET language to design the maneuverability simulation platform on MMG. And designed six rudder blades with different aspect ratio, and carried out a series of manipulation turning tests of the ship model under different speed and rudder angle. Through comparing with experimental data and the simulation results, it has verified the reliability of the simulation platform. Then with the system identification methods, the paper has discussed the aspect ratio of the rudder which has influence on the manipulation rotary motion of the composite trimaran ship model, and the manipulation rotary performance of the composite trimaran ship model in different speed and rudder angle.
Construction of Battery Swap Station for Electric Passenger Car
Authors: Niu Rong Yi , Yin Xiao Yan , Zhao Ming Yu
Published: December 2012

Basing on the status quo of the development of electric vehicle and electric vehicle’s Charging/battery swap infrastructure, Discussion and analysis is made with focus on the battery swap mode and it’s practising method of electric passenger car. According to the body structure of different types of electric passenger car and the Situation that the battery pack is equipped with, Electric passenger car are divided into two types: chassis battery type and battery rear-equipped type. Respectively, analyzed the battery swap mode for the two types of electric passenger cars; And two feasible battery swap projects are advanced , analysed and compared.Then pointed out the difficulties and problems with the construction of the battery swap station for electric passenger car; Finally, suggestions and methods to solve the problems were offered.
Reflections on Livelihood Issue in Post-Disaster Reconstruction Planning of Wenchuan Earthquake
Authors: He Min , Zhou Bo
Published: December 2012

The 5.12 Wenchuan Earthquake caused enormous casualties and property losses. The post-disaster reconstruction, difficult, complex, and long, is a continuous systematic process, of which the livelihood issue is of paramount importance. This paper, through the field investigation in disaster area, conducts an in-depth study on the post-disaster reconstruction current situation and the trend of public opinion, puts forward a few reflections, analyzes and explores the countermeasures, in order to provide valuable experience and ideas on the reconstruction planning after earthquakes in the future.
Impact of Administrative Division Adjustment on Location and Accessibility of Heifei, China
Authors: Zhu Chuan Hua , Xie Hua Ming , Zhou Wen Xiang , Zhang Shou Wen
Published: December 2012

The location may appear to be extremely important due to changes of some factors. Administrative division expansion of Hefei in August 2011 will affect its location advantage and accessibility. In this paper, updated data of the study area were collected including administrative division, transportation network and economic data, by using GIS spatial analysis methods and establishing the economic potential model, quantitatively evaluated the location advantage and accessibility of Hefei before and after the administrative area adjustment, and analyzed the economic relationship change between Wanjiang urban belt cities and Nanjing based on the gravity model. The results show that Hefei occupies the highest accessibility while Maanshan, Chuzhou and Wuhu comparatively rank behind before the administrative division adjustment, and the descending order is Maanshan, Hefei, Chuzhou and Wuhu after the administrative division adjustment. Although the location advantages of Hefei relatively reduced, the economic relationship have been further enhanced on the regional level, which played an important role in formation of the industrial cluster in Wanjiang urban belt and enhancing regional competitiveness, for easy integration into the Pan-Yangtze River Delta city group and promoting regional economic development in Anhui Province.
The Analysis of 16MnR Steel Compact Tensile Fatigue Fracture after High Temperature
Authors: Liu An Zhong , Wang Tao , Zhang Su
Published: December 2012

In this paper, the test of compact tensile fatigue fracture of 16MnR steel was done after high temperature, and the relation between the proof values Ji at crack initiation of fatigue fracture and fatigue fracture fractal dimension was studied. The experimental results show that the relation between the proof values Ji at crack initiation and the heating temperature. The compact tensile fatigue fracture fractal dimension was changed when 16MnR steel sample was heated to different temperature.
Flexural Strength of C40 HPC after Elevated High Temperatures
Authors: Nie Xiao Qing , Du Hong Xiu , Yan Rui Zhen
Published: December 2012

After 51 C40 HPC specimens with a size of 100mm×100mm×400mm were heated to 400°C, 600°C, 700°C, 800°C for 2 hours, and 300°C and 500°C for 1h, 2h, 3h, 4h, 5h separately, cooled naturally and placed for 24 hours, the flexural strength were experimented respectively. Subsequently, the effect of high temperature and its acting time on the flexural strength of HPC and the variation discipline were analyzed; meanwhile, the degradation mechanism of HPC after elevated high temperature was discussed.
Experimental Study of Binary Composite Phase Change Material for Building
Authors: Wang Yan Jin , Tao Hong Ge , Zhang Zhi Ping
Published: December 2012

Phase change energy storage building material has become a widespread attention for the field of building energy conservation because of its excellent storage properties. The phase change material which is able to adjust the indoor temperature, belongs to the low temperature phase change material. There are lots of kinds of it, and then how to find a suitable phase change material has become a key problem. In this paper, the characteristics of the inorganic material, single organic material, and binary organic material were tested, and the phase change temperature and latent heat of composited phase change material were analysed by differential scanning calorimetry(DSC), which could provide a theoretical basis for the search for the appropriate phase change material.
Constitutive Behaviour of Lateral Ties Confined Polyolefin Fibre Reinforced Concrete under Monotonic Axial Compression
Authors: Palanivel S. , Sekar M.
Published: December 2012

In this investigation, the combined effect of spacing of lateral ties and volume fraction of polyolefin fibres was studied both experimentally and analytically from the point of deformability characteristics of concrete. Low modulus synthetic fibers such as polyolefin based fibers, it is shown that polyolefin fibers with sufficient tensile strength can successfully enhance the mechanical properties of concrete. The mechanism of delaying and arresting the progressive internal cracking from transition zone to the matrix by the fibres can be made use in passive confinement of concrete. Such concrete was termed as polyolefin fiber reinforced concrete (PFRC). In this study the confinement effectiveness of polyolefin fibres of volume fractions 0.3%,0.5%,0.7%,0.9% and 1.2% in addition to lateral ties of spacing 290mm, 145mm and 75mm on concrete prisms of size 150 ×150 ×300 mm were investigated. Such concrete is termed as confined polyolefin fiber reinforced concrete (CPFRC).This paper presents an analytical model(profile) for predicting the constitutive behaviour of CPFRC based on the experimental and analytical results. A total of seventy two prisms of size 150 ×150 ×300 mm were cast and tested under strain control rate of loading. The increase in strength and strain of CPFRC were used in formulating the constitutive relation. The results of the testing demonstrate the behavioral differences between plain and CPFRC and the ability of the synthetic macro fiber to be used as secondary reinforcement in seismic resistance applications.
Quality Testing of the Chrome Coating Based on Acoustic Emission Technology
Authors: Wang Xing Guo
Published: December 2012

A assessment method on quality detected system was developed on cylinders inner wall coating through the hydraulic radial expansive load system and acoustic emission testing technology,. Put double probes linear position principle and uniform motion of load system together, and make curved positioning come true based on the technical principle of locating acoustic emission source. The disadvantage was solved that double probes can’t make acoustic emission source planar positioning. The result showed that this system can provide a precise identification and location; it has fast testing velocity and portable device.
Interfacial Transition Zone Meso-Structure of MgO Concrete Loaded to Failure by Computed Tomography
Authors: Yang Hua Quan , Chen Xia , Zuo Yong Zhen
Published: December 2012

The computed tomography was introduced to track the development of cracks in cement matrix and interfacial transition zone of MgO concrete under load to failure. Results indicated that some pores were present before concrete was loaded due to none compaction which would tend to initiate cracks expanding. After loading, energy transferring route kept changing and extended towards weak area and it chose to be released through aggregates when concentrated stress on cracks tip surpassed ultimate load with consequences of some cracks getting interconnected with each other through cement matrix. Differentiated and Binarized CT images analysis confirmed that width of cracks was increased and extending routes diversified with loading implemented and interfacial transition zone remained primary choice for cracks development.
Development of Mix Design Nomograph for Polyethylene Terephthalate Fiber Concrete
Authors: Irwan J.M. , Othman Norzila , Koh Koh Heng , Asyraf R.M. , Faisal S.K. , Annas M.M.K. , Shahrizan A.M.
Published: December 2012

The aim of this project was to develop of mix design nomograph for PFC that can be used for estimated the required compressive strength and splitting tensile strength with the required PET and water-cement-ratio.The fibers were prepared by using plastic granulator machine SLM 50 FY with size passing 10 mm and retained 5 mm sieve. Different volumes percentages of PET fibers with 0%, 0.5%, 1.0% and 1.5%, were introduced in concrete mixes. The specimens prepared for this study was cylinder concrete with 100 mm diameter and 200 mm height. The laboratory work for physical properties were focused on density and workability, meanwhile for mechanical properties were focused on compressive strength, splitting tensile strength and modulus of elasticity of PET fiber concrete (PFC). The experiment results indicate that the addition of PET fibers significantly decreased the compressive strength and splitting tensile, however the compressive strength still can be acceptable since achieved the mix design The nomograph developed can be used to estimate the desired compressive, splitting tensile strength as well as the modulus of elasticity (MOE).
The Provincial Third Middle School of Shanxi – A Masterpiece of Pre- Modern Architectures in Shanxi Province
Authors: Pang Ji Wei , Wang Ying
Published: December 2012

Based on the analysis of the Provincial Third Middle School of Shanxi, the author demonstrates that these pre-modern school buildings are an excellent example of the rapid development of Shanxi pre-modern education and are a unique building complex among pre-modern school architectures in Shanxi, proving that the buildings themselves are of prominent historical value and are inspiring for contemporary architectural design.
Study on Alkali-Reactivity of Aggregates Used in Projects in Kaifeng City
Authors: Liu Feng Li , Liu Jun Hua , Zhang Cheng Zhi
Published: December 2012

Investigation to the source of aggregates used in engineering in Kaifeng area was carried on. The aggregates used in experiment came from main places supplying concrete aggregates for projects in Kaifeng. By the Autoclaved Method, the ASTM C1260 Method, Accelerating Mortar-bar Method (10mm×10mm×40mm in dimension) to determine whether the concrete aggregates has alkali-reactivity. The results show that 14 days expansion rate of each sample is less than 0.1% and the aggregates have no activity.
Experimental Study on the Comparison of Resisting Semi-Armour-Piercing Projectile Penetration Ability for Steel Mesh, Steel Fiber and Steel Composites
Authors: Wang Yun Feng , Wang Yao Hua
Published: December 2012

A new protective material-steel mesh reinforced concrete was developed under the condition of modern high-tech weapon development. The comparative tests were conducted with steel fiber reinforced and steel reinforced concrete. The enhancement characteristics of three composites were analyzed in the respects of base material, the distribution of reinforced material and its bonding. The results indicate that steel mesh reinforced concrete is the most effective composite resisting penetration.
Review of Strength and Failure Criteria for Concrete After Freeze-Thaw Damage
Authors: Qin Yan Fu , Tian Bin , Xu Gang , Lu Xiao Chun
Published: December 2012

Frost resistance research is one of the important subject of concrete durability, however strength criteria is an important part of the study of mechanical behavior of concrete. So far, about concrete failure criteria are almost for normal concrete, which the domestic and overseas scholars have comparative detailed research in every respect to it, and to freeze-thaw damage of concrete but few research. Based on the summary of the existing ordinary concrete strength and failure criteria in normal state and after freeze-thaw damage，this paper have a brief comment of failure criteria on concrete after freeze-thaw damage. For later research about concrete strength and failure criteria under freezing and thawing cycle provide the reference.
Experimental and Numerical Investigation on Stress-Strain Relationships of GFRP and Lateral Ties Confined Polyolefin Fibre Reinforced Concrete under Monotonic Axial Compression
Authors: Palanivel S. , Sekar M.
Published: December 2012

In this investigation, the combined confinement effect of spacing of lateral ties, volume fraction of polyolefin fibres and fibre reinforced polymer(FRP) wraps was studied both experimentally and analytically from the point of deformability characteristics of concrete for seismic resistance. Low modulus synthetic fibers such as polyolefin based fibers, it is shown that polyolefin fibers with sufficient tensile strength can successfully enhance the mechanical properties of concrete. The mechanism of delaying and arresting the progressive internal cracking by the fibres can be made use in passive confinement of concrete. In this study the confinement effectiveness of GFRP wraps of single and double layer and polyolefin fibres of volume fractions 0.7% and 0.9% in addition to lateral ties of spacing 145mm and 75mm on concrete prisms of size 150 ×150 ×300 mm were investigated. Such concrete is termed as FRP confined fiber reinforced concrete(FRPCFRC).This paper presents an analytical model(profile) for predicting the constitutive behaviour of FRPCFRC based on the experimental and analytical results. A total of thirty nine prisms of size 150 ×150 ×300 mm were cast and tested under strain control rate of loading. The results of the testing demonstrate the behavioral differences between FRP confined concrete and FRP confined FRC and the ability of the synthetic macro fiber to be used as secondary reinforcement in performance based seismic resistance applications.
Investigation and Improvement on the Mechanical Property of Cement Mortar
Authors: Zhang Hai Bo , Guan Xue Mao , Shang Hai Tao
Published: December 2012

This paper examined the mechanical property of rubber mortars with different amount of rubber granules addition and the influence of fly ash, slag and silica fume. The increase of rubber granules results in the decrease in compressive and flexural strength of rubber mortar, but increases the ratio of flexural to compressive strength. The fly ash, slag and silica fume are useful for improving the mechanical property of mortar. The examined contact angle of water against rubber is 99.5°, which suggests the rubber surface is hydrophobic, and the hydrophobic surface interprets the weak interface between rubber and cement matrix.
Influence of Crushed Basalt Aggregate on Crack Resistance of Concrete
Authors: Yan Jian Jun , Zhou Shi Hua , Peng Shang Shi
Published: December 2012

The crack resistance of concrete with crushed basalt aggregate was studied. Compared with the limestone concrete, the basalt concrete has larger drying shrinkage and autogenous volume deformation. The linear expansion coefficient of basalt concrete is 1.3×10－6 /°C larger than that of limestone concrete, and it has additional temperature deformation of 24.1×10－6. According to the analysis on temperature-stress of concrete, the cracking temperature of basalt concrete is 8.9°C higher than that of limestone concrete, and the crack resistance of basalt concrete is unfavorable.
Analysis of the Possibility of Using Geopolymers as a Matrix in Sprayed Concretes Used under Extreme Conditions
Authors: Dufka Amos , Kosíková Jana , Mészárosová Lenka , Liška Marek
Published: December 2012

The article analyses the possibility of using geopolymers as a matrix of sprayed concretes intended for realisation of constructions in the environment with an increased fire risk. Thanks to their specific properties, geopolymers show a high resistance to extreme temperatures. Thus, using geopolymers as a matrix shows a considerable potential in the light of development of sprayed concretes resistant to high temperatures.
Dynamic Analysis of Reinforced Concrete Beam under Shock Wave
Authors: Yang Liu , Wang De Rong , Shi Cun Cheng
Published: December 2012

Bearing capacity of RC beam calculated by using typical dynamic computing methods can not define the truly distributed internal force all over the deflection from the beginning of load; the main reason is the change of the form of deflection and internal force to time are not taken into account. The dynamic responses of simply supported beam under shock wave are established. Based on beam dynamic equations, some formula set to solve the problem of random load is gained by using the free vibration mode method. The expression of the bearing reaction of beam is reverse under shock wave. In order to avoid bearing separation, special structure measure must be adopted.
Analysis about the Traditional Dwellings Passive Technology Energy Efficiency in Huizhou
Authors: Zhong Jie , Jia Shang Hong
Published: December 2012

The traditional dwellings Huizhou,which adapts to the local wet hot climate,crests relatively indoor thermal environment, with its own design reducing energy consumption. That is significant modern building energy conservation. This article analyzes the passive cooling technology of traditional dwellings Huizhou from several aspects, dwelling settlement planning, building space design and building construction etc,which greatly inspires for modern building energy conservation.
Lighting Energy Management System Based on PC’s Power Save Mode
Authors: Han Jin Soo , Jeong Youn Kwae , Lee Il Woo
Published: December 2012

Lighting energy shares a large portion of building energy. Although lighting control system is deployed in the building, it has limited effects on reducing lighting energy use without the help of occupancy sensors. We use PC’s power save mode as an occupancy sensor in office buildings that are not equipped with occupancy sensors. When each PC goes to power save mode, it means that there is no one in that area, that is, no occupancy. If we make mapping relation between the lights and the PC’s, we can figure out when the light should be turned on and off from the state of PC’s power save mode. This scheme can contribute to reduction of lighting energy use in buildings that has lighting control system but has no occupancy sensors. The estimated results show the positive effect on reduction of the lighting energy use.
Design Languages of Contemporary Neo-Vernacular Architecture in China
Authors: Zhao Mei , Gao Wei
Published: December 2012

The paper states the developmental background of neo-vernacular architecture in China, and introduces the concepts of vernacular architecture and neo-vernacular architecture. From the four aspects, form language, material language, technology language and space language, the paper expounds the design methods and ideas of contemporary neo-vernacular architecture of China with some building examples. In the end of the paper, the author points out that we should encourage the development of the neo-vernacular architecture in China.
Optimizing Exergy Efficiency of Flat Plate Solar Collectors Using SQP and Genetic Algorithm
Authors: Khademi Maryam , Jafarkazemi Farzad , Ahmadifard Emad , Younesnejad Saman
Published: December 2012

An increase in exergy efficiency of flat plate solar collector leads to a considerable improvement in collector’s performance. Different parameters influence the performance of collector. In this paper, Sequential Quadratic Programming (SQP) and Genetic Algorithm (GA) have been employed for optimizing exergy efficiency of the flat plate solar collector. Absorber plate area and mass flow rate of inlet water have been considered as optimization’s variables. The results show the possibility to reach higher exergy efficiency with lower absorber area and consequently lower price. Also it is obvious that SQP method performs optimization process with higher convergence speed but lower accuracy than GA.
A Study on Residents Consciousness of Low Carbon Building in Jiaxing City
Authors: Ning Bi Bo , Tian Wei Li
Published: December 2012

This article analyses the statistical data of questionnaires about low carbon building awareness of Jiaxing City residents, and concludes three points as following. Firstly, residents get low carbon building information from internet, television, magazines and so on, which gives them a hand to develop a sense of low carbon building. Secondly, the residences also have a relatively high degree of cognitive about the effect of low carbon buildings to both the environment and economy. Thirdly, as the price of low carbon building is more expensive than ordinary buildings, citizens do not have a strong realistic desire to purse low carbon buildings. However, it can not be neglected that the higher annual household income the stronger willing of purchasing low carbon building. Under these circumstances, it is an ideal way for government to carry on more incentive policies not only to support developer to develop low carbon building but also encourage citizen to purchase low carbon buildings.
Research on Construction of City Road Greening
Authors: Bai Lu
Published: December 2012

Combining with the status quo of street greening in XuChang, this article pointed out the problems existing in the city road greening construction, and further discussed the improvement measures, in order to beautify the environment, promote traffic safety.
Environment and Culture during the Pre-Qin Period in the Chaohu Lake Basin, Anhui Province, East China
Authors: Wu Li , Li Feng , Wang Xin Yuan , Li Su Yuan , Zhu Cheng
Published: December 2012

The Chaohu Lake Basin is one of the human influenced regions of the Pre-Qin Period in China, and more than 100 archaeological sites of Pre-Qin Period were found in this area. There are good relationships between temporal-spatial distribution of archaeological sites and environmental changes, especially with the changes of lakeshore of Chaohu Lake caused by the regional climatic oscillation. The relatively warm and humid climate of the Pre-Qin Period, the important position of ancient Chinese culture exchanges between the north and south, the developed water network, and rich biological resources, all of these factors had been the important environmental foundation for the originating and development of the Pre-Qin culture in the basin.
Nature Landscape Farms Rural Areas – Ecological Cycle – A Case Study of Yansaihu Greenway Planning of Qinhuangdao City
Authors: Liu Xue Fei , Wang Ning , Wu Zhi Guang
Published: December 2012

With the rapid development of new rural construction, rural areas have been changed enormously. At the same time, the ecological environment of rural areas has suffered a lot, especially, for the water environment and the rural landscape. In this paper, Yansaihu greenway planning of Qinhuangdao City has been used as an example, to demonstrate how to combine the nature, the Yansaihu water, the fields, and the rural areas in series by means of the greenway planning. While using and protecting Yansaihu natural landscape, it promotes agricultural leisure industry and extends the historical and cultural context, protects water resources in the ecological environment, and promotes the purpose of harmonization of nature, landscapes, farmland, and rural landscape, in order to achieve both of the rural environment and ecology landscape as well as rural economic development.
Researches on Environmental Value of Existing Buildings' Adaptive Reuse
Authors: Zhang Lei , Lei Hui Min
Published: December 2012

The construction industry is one of the important environment-polluting industries in global. Aims at the present “short-lived” phenomenon of existing building in China, This paper firstly introduced the concept of Embodied Environment Effect Factor (EEEF) and on the platform of this concept; the whole life cycle EEEF value is calculated. The result shows that constantly updated and reuse to extend the life of the building in its life cycle, reducing the probability of demolition and reconstruction, will be an effective means to reduce resource consumption and environmental damage.
Meteorological Conditions Influences on the Variability of Algae Bloom in Taihu Lake and its Risk Prediction
Authors: Jing Yuan Shu , Jing Zhi Hao , Hu Jing Yuan , Chen Fei
Published: December 2012

Lake eutrophication and algal bloom is one of the most important environmental problems facing China's lakes, and it is also the focus of lake eutrophication control of the world's attention. The monitoring data on chlorophyll concentration was analyzed every one month, combined with corresponding weather conditions from 2004 to 2006. According to the degree of eutrophication in Taihu Lake, it is divided into five Lakes: heavy eutrophication region V, eutrophication region IV, middle-level eutrophication region III, light eutrophication region II and nutrition region I. Based on fuzzy factor optimization method, the average wind speed, average pressure, average temperature and sunshine hours was selected to discuss the influence mechanism of meteorological factors on the algae bloom in Taihu Lake. Considered the four meteorological factors as the input layer nodes, BP neural network model was applied to build the zoning monitoring and early warning model of blue algae in Taihu Lake.
Adsorption Characteristics for Lead(II) by Fulvic Acid-Modified Vermiculite
Authors: Xiang Wen Jun
Published: December 2012

Fulvic acid-modified vermiculite (FA-Ver) was prepared by mixing vermiculite and fulvic acid in a suspension. The XRD patterns showed that the vermiculite in FA-Ver possesses an irregular stacking of layers supported and non-supported by fulvic acid particles. The specific surface area (SSA), cation exchange capacity (CEC), pH at zero point of charge (pHZPC), and surface charge at pH 6.0 of FA-Ver was 379.35 m2/g, 52.17 cmol/kg, pH 2.36, and -0.442 mmol/g, respectively. The SSA, CEC and surface negative charge of FA-Ver increased and the pHZPC decreased compared to the corresponding values of vermiculite. Langmuir and Freundlich isotherms fitted the adsorption data for Pb(II) by HA-vermiculite well (R2=0.988 and 0.982, respectively). The Freundlich correlation coefficient of vermiculite was low (R2=0.954) and that of FA-Ver was slightly higher (R2=0.980). At pH 6.0, the Langmuir maximum adsorption capacities for Pb(II) of vermiculite and FA-Ver were 11.86 and 19.41 mg/g, respectively.
Comparative Study of the Degradation of Real Dyestuff Effluents by Three Kinds of Electrolysis Methods
Authors: Chen Zhan Li , Huang Xiao Hua , Sun Xiang Rong , Li Liang
Published: December 2012

A comparative study of three kinds of electrolysis methods: indirect electro-oxidation, electro-flocculation and electro-Fenton, as pre-treatment processes for a real dyestuff wastewater with high salinity and unbiodegradable organics were investigated. The efficiency of each method was evaluated according to the reduction levels of COD and toxicity, as well as biodegradability improvement. The results indicate electro-Fenton process as the most efficient pre-treatment method for improving biodegradability, reducing toxicity, and removing organic pollutants from dyestuff wastewater.
Study on Cu2+ Removal from Water via an Cation Exchange Membrane
Authors: Xie De Hua
Published: December 2012

The removal of Cu2+ in water via an ion-exchange membrane under no external voltage condition was studied in the research, and effects such as Cu2+ concentration, concentration of compensation potassium ions, water stirring speed, temperature and hydraulic retention time (HRT) on the removal efficiency of Cu2+ were also investigated. The results showed that when the initial concentration of bivalent ion Cu2+ was 0.0787mmol/L （5mg/L）, under the experimental conditions of the water temperature at 25 °C , the HRT was 6h, the hydraulic mixing speed was 600±25rpm, and the concentration of the compensation ion K+ was 10 times as that of Cu2+, and the removal efficiency of Cu2+ could be achieved 85%. In addition, using the same equipments, when the inlet concentration of Cu2+ increased to 0.787mmol/L (50mg/L), the removal efficiency would be decreased to 76%; while the ratio of concentration of compensation potassium ions to that of inlet Cu2+ is larger than 20, the removal efficiency would not change significantly as the ratio continued increasing; the removal efficiency would be decreased to 60% when lowering the stirring speed to 300±25rpm; the removal efficiency would be decreased to 68% when lowering the temperature to 15+1 °C; the removal rate was no significant change when the hydraulic retention time (HRT) from 6h to 12h.
Field Studies on the Treatment Capacity of the Stormwater Wetland
Authors: Xu Jin , Xu Li Gang , Gong Ran , Dong Lei
Published: December 2012

Integrated wetlands combined with emerged macrophytes and hydrophytes provided an innovative option for treating storm water. The study evaluated the removal effect of nitrogen (ammonia, nitrate, nitrite, total phosphorus) and phosphorus (total phosphorus) for storm water in riparian wetland. The 15 month monitoring campaign investigated that most of the effluent nutrients (except nitrite) concentrations were significantly less than inlet concentrations. The nitrogen removal fluctuated widely over time, and the removal rates were associated with the cultivation of biofilm and reeds. Furthermore, the study also demonstrated that the removal efficiencies of nitrogen and phosphorus were not closely related to the rainfall duration.
Influence of Organic Load on Phosphorous Release and Absorption in HA-A/A-MCO Sludge Reduction Process
Authors: He Jin Chao , Zuo Ning
Published: December 2012

When organic load of mixed liquid is up to a certain value, organic matter content is not the restrictive factor of phosphorus release any more. Optimum organic load for phosphorous anaerobic release in HA-A/A-MCO process is 0.141gCOD/gMLSS.d. Sufficient phosphorus release in anaerobic phase is the premise that high efficiency phosphorus absorption can be obtained in anaerobic phase. The maximum of releasable phosphorus sludge per unit weight (Pm/M) in HA-A/A-MCO process is 5.7mgP/gMLSS
Researches on the Shear Deformation of Joints Domain of Beam-to-Column Connection of Light Steel Structure
Authors: Hu Xi Bing , Lu Jian Hua
Published: December 2012

The joint domain of beam-to-column connection is very complex parts under loading, which plays an important role in transferring internal forces in light steel structure, such as moment, shear, axial force and so on. Considering the influence of its shear deformation in the structure calculation can help us to reflect the actual mechanics performance and evaluate precisely practical bearing capacity of the structure. According to the actual characteristics of beam-to-column connection, the author established some models of its joint domain, and used the finite element method to analyze and calculate shear deformation of these models. Meanwhile, the author researched the influence of the changes of various parameters to its shear deformation, and provided beneficial suggestions for revising the current design method of light steel structure finally.
Study on the Structural Floor Design of High-Rise Buildings
Authors: Huang Ling
Published: December 2012

There is a high-rise building whose main structure is framework - core tube. In order to meet the requirements for architectural features, the distance between the outer frame and the exterior wall of core tube is relatively small, therefore the floor structure program adopts a thick plate and wide flat beam floor system, and part floors of the upper structure adopt a thick plate and dark beam system. As wide flat beams (dark beams) have a small height and cannot form effective support for the floor, special analysis has been made on floors from the security point of view without considering the role of wide flat beams (dark beams). The floor system of this high-rise building has been analyzed and discussed with regard to bearing capacity, deformation, comfort and other aspects.