bluuebunny/crossref_metadata_2025 huggingface dataset:
The Distribution Characteristics of Total Sulfur Content of Coals Formatting in Different Geological Age, Guangxi Province, China
Authors: Xu Bo Hui , Ding Shu Li , Wang Dong
Published: September 2013

The era distribution characteristics of total sulfur content of coals formatting in Early Carboniferous, Later Permian, Early Jurassic and Cenozoic in Guangxi,China, were studied by basing the statistics and analysis of total sulfur content of 19 important coals producing area including 173 exploration area and mining area. The results show that the coals of Early Carboniferous are mainly high sulfur coal and sub-high sulfur coal and the total sulfur content is high around the centered area around Liucheng Guilin - Xinan area and gradually decrease along south and north sides. The sulfur content of Late Permian coals are very high and reach to 5%-8% in some area and there is great difference among sulfur content in different area. The sulfur in Early Jurassic coals have great difference in distribution and are up to 10% in Northeast Guangxi area but less than 0.5% in Southeast Guangxi area. The coals of Cenozoic are low sulfur coal in common.
A New Method for Predicting Compressive Strength of Cement-Based Materials
Authors: Zhang Jin , Jin Nan Guo , Tian Ye , Jin Xian Yu
Published: September 2013

As a porous medium, the strength of cement-based materials is significantly affected by its porosity. This paper presents a new method to describe the strength development of cement-based materials as a function of porosity based on a developed microstructure hydration model of cement. The hydration model deduces the relationship between the diameter change of cement particle and time based on Krstulović-Dabić hydration kinetics formulas and extends a broader version by considering the effect of water reduction, temperature variation, interfacial contact area between hydration products and free water on the hydration rate. Using the hydration model, the time-varying development of porosity can be obtained. Then, based on the strength model proposed by Maekawa et al, in which both the present and initial porosity are taken into account, a new method was established to predict the strength evolution with the porosity calculated by the hydration model.
The Study of Sheer Lag Effect by the Influence of Strengthened Story
Authors: Ma Shuai , Ma Fu
Published: September 2013

In this paper,a brief and effective finite element analysis model is established though using the ETABS.The influence of strengthened story’s quantity and location to the Sheer Lag Effect through the elastic linear analysis was researched.The variation of the Sheer Lag Effect in the process of the changing quantity and location of strengthened story and so on are discussed.The influence relation of strengthened story by the Sheer Lag Effect is analyzed,which has the important practical significance to reality structure design.
Loading Height on Reinforced Brick Masonry Wall's Failure Mode and Seismic Performance with Finite Element Analysis Method
Authors: Wu Zhi Heng , Zhang Wen Fang
Published: September 2013

Loading height is a key factor that affects brick masonry wall specimens failure mode and seismic performance. To explore reinforced brick masonry walls failure pattern and seismic performance in different loading height, reinforced brick masonry wall MARC finite element model with 1.44 aspect ratio is set up to analyze its failure mode and seismic performance at constant vertical stress and different loading height. Results are as follows: bending failure happens more easily at higher loading height and shear failure happens more easily at lower loading height; wall specimen shows better deformation ability, elastic and plastic energy dissipation capacity but lower ultimate bearing capacity at higher loading height.
Static and Dynamic Analysis for Tower in a High-Rise Steel Reinforced Concrete Composite Structure
Authors: Wang Jian Qiang , Ma Wen Tao , Ma Min Jing
Published: September 2013

Steel reinforced concrete composite structure which apply in the high-rise buildings, not only save steel, but also have excellent properties in fire prevention, anti-corrosion, and seismic performance, and improve the speed of construction, economic efficiency.This thesis based on the analyse of a steel reinforced concrete composite structure tower and the domestic and foreign experts study use Finite Element Analysis software SAP2000 analyze the dynamic Performance of the structure to draw the inherent vibration period and frequency of the structure. The structure is analyzed to obtain its deformation with different height of the structural elements under a small earthquake. Structure and component in elastic stage when suffur a small earthquake. Using the mode decomposition response spectrum method and method of linear time history analysis, the maximum horizontal displacements of the structural layer, the maximum inter-story displacement and the maximum inter-story displacement angle is obtained to see if the results within a predetermined range.
The Numerical Analysis of Isolation System in the Sandwich Structure Based on Properties of Reinforced Concrete
Authors: Wei Ying Rong , Ma Fu
Published: September 2013

The calculation of isolated structures mature finite element analysis software MIDAS / Gen choice of 8 degrees Area with five framework for the establishment of the original five-layer structure model, the five-story concrete frame + two layers of steel frame structure model, the five-story concrete frame + two layers of concrete frame structure model, the five-story concrete frame + two layers of steel frame structure model (isolation), the five-story concrete frame two layers of concrete frame structure model (isolated) five models numerical Analysis. Being frequently occurred earthquake response spectrum analysis to come to the results that the building structure using additional layers isolation measures compare with not using layer structure measures, the former can significantly reduce the seismic action [1].
Mechanics Research on the Vertical Bearing Characteristics of Suction Pile Cluster in Soft Ground
Authors: Qu Jin , Du David
Published: September 2013

For a suction pile, drainage condition influences the magnitude of under-pressure ('suction'). As the growth of suction, the break-out resistance transforms from local shear failure, local tensile failure to general shear failure. This paper will discuss the failure mechanism of suction pile cluster under vertical load with different drainage conditions. The finite element method and software ABAQUS are employed to analysis these problems.
Evaluation of Slope Stability Based on Fuzzy Grey Element-Matter Model Based on Properties of Mechanics
Authors: Sun Shi Guo , He Yan Yan
Published: September 2013

In view of the gray numbers in fuzzy matter-element values, in this paper matter element analysis which can consider the incompatibility between the various factors will be combined with gray system theory. Thus a fuzzy gray element evaluation model was established for the stability of rock slope, and the stability of Bu-zhao-ba open pit west slope was evaluated by this model. In this model the composite gray matter-element was established by five slope stability grades, six factors and its corresponding gray value by correlation transformation. This model can solve the above contradictions efficiently, and the result of the comprehensive analysis in the west slope of Bu-zhao-ba open pit by this model was same as the reality basically.
Study on Mechanical Materials with Overview of Connection and Separation Devices
Authors: Dong Xiao Tong , Jiang Yi
Published: September 2013

Different kinds of mechanical materials in connection and separation devices have been widely used in spacecraft engineering and keep on innovating and improving. Pyrotechnic and non-pyrotechnic devices have their own advantages and drawbacks and the application of new materials such as SMA (shape memory alloy) and low-melting point materials has become a new and striving issue. Different kinds of connection and separation devices and their prime mechanical materials will be presented in details in this paper.
Damping Integrated Technology in Three Concentric Circles Stereoscopic Applications on Steel Arch Truss
Authors: Li Peng Yu , Gao Zhi Chang
Published: September 2013

By the software SAP2000, this article established a 60 m span steel arch three concentric circle space truss model, derived modal characteristics, mastered the dynamic characteristics. By using isolation bearing, viscous dampers[1], shock absorption technology and integrated rear arch truss damping effect. Conclusions show that integrated damping technology, making the earthquake forces effectively reduced.
The Stability Analysis on the Different Types of Single Layer Latticed Shell
Authors: Wu Jun Qiang , Cui Yu
Published: September 2013

This single-layer spherical reticulated shell has the advantages of reasonable stress,beautiful appearance ,fast construction,is widely applied in practical engineering. Through the static stability analysis of three kinds of single-layer spherical lattice shell structure using ansys, we get them in the uniform deformation under static load, the modal, buckling load. The results show that: The Kiewitt latticed shells displacement is small, structure is stable, better than SchwedLer and lianfang.
Different Force Conditions on Nonlinear Finite Element Analysis of Small Concrete Hollow Block Wall with Failure Modes of Influence
Authors: Chen Hong Yi , Ma Fu
Published: September 2013

This paper mainly studies small hollow concrete block wall sets a certain level of reinforcement, vertical bar, core column and high aspect ratio, vertical and horizontal load, changes in load point height wall by shear form and bending failure pattern changes and shear capacity and flexural capacity. Nonlinear analysis simulation using ANSYS finite element analysis software of the specimen, mainly analysis and predict the failure modes of the different loading conditions wall. Obtained by calculating the failure pattern of the specimen, the load-displacement curve, the various stages of the load-displacement values and calculated the relative deformation and ductility factor of the wall under various loading height. Comparative analysis of the load-displacement curve variation of the shear failure and bending failure form, draw the conclusion that bending failure energy consumption better performance.
Research on HEC’s Hardening Effects on Topsoil in China’s Xinjiang Uygur Autonomous Region
Authors: Lei Wei , Xu Guang Zhao
Published: September 2013

In order to solve the problems concerning water loss and soil erosion as well as affected soil stability caused by the construction of towering footing of electric transmission line in Chinas Xinjiang Uygur Autonomous Region, HEC, a new curing agent which is strong and highly water-resistant, is used in the process. In construction, samples acquired are used in some indoor experiments on intensity, air shrinkage, swelling, frost heaving and sluicing. Effects of the consolidated soil on site are observed during a hydrological year and the results show that the material is good enough for wide-spread promotion and application in areas with same conditions.
Study on Soil Particle Size Distribution by Digital Image Processing
Authors: Hou Jian Shu
Published: September 2013

The particle size distribution of soil is very importantto its physical and mechanical property. The ordinary method of the particlesize distribution analysis is based on shaking the soil through a set of sieves.But it will be difficult to use the method while there have particles largerthan the biggest aperture of the size sieves. Then the digital image processingwas used to solve the problem here. The processing technologies, such as imageanalysis and enhancement, deblurring, edge detection were studied to analyzethe image of soil particles. Then the image processing method was used to getthe particle size distribution accurately. Though some promotions need to becarried out in the further study, it is can be found that the image processingmethod is more efficiently than the traditional method.
Investigation on the Performances of High Volume White Mud-Fly Ash Brick
Authors: Zhang Xu , Yan Yun , Yang Lin , Xie Fei Lin , Hu Zhi Hua
Published: September 2013

In this paper, non-fired load-bearing wall bricks were prepared with high volume of white mud and CFBC fuel ash in laboratory scale. The effect of manufacturing parameters on the performances of the brick, such as mechanical properties, antifreeze and dry shrinkage, etc., were investigated. The impact of different curing regimes on these performances of the bricks with various raw materials formula has also been investigated. The experimental results show that the compressive strength of the brick could come up to 25.1MPa and the all other performances can meet Chinese national standard requirements. The best formula that bricks having the best performance is when the white mud dosage is 30%, and the best curing regime is autoclaved 180°C, 10h. The microstructure of the brick was examined by FESEM, XRD and EDS. Tobermorite (C5S6H5) has been generated at this time, which has a better crystallinity and has a higher silicon polymerization degree.
Study on Building Materials with Exterior Insulation System Problems and Solutions
Authors: Zhang Xiao Jie , Liu Yuan Ping
Published: September 2013

Building palisade structure is the most important part of the wall, so the external wall thermal insulation technology has become an important part of building energy efficiency. After the author found the domestic use of insulation materials in a variety of forms, different use method makes the external wall thermal insulation system has a problem. The analysis of the cause of the problem at the same time, this paper discusses how to use of selected materials and improving the construction methods to avoid the happening of the accident.
Study on Biogas Production by Mesophilic Fermentation with Conyza canadensis
Authors: Zhang Li Juan , Lin Wei Dong , Zhang Wu Di , Yin Fang , Zhao Xing Ling , Liu Jing , Xu Ling , Chen Yu Bao , Liu Shi Qing
Published: September 2013

In order to study in the field of fermentation to produce biogas withConyza canadensis, the anaerobic batch fermentation experiments were performed at 30°C. The results indicated that the net biogas production of the experimental group during total fermentation time of 36d was 3280ml. Further, it was calculated that the biogas production potential ofConyza canadensiswas 354ml·g-1TS or 413ml·g-1VS.
Experimental Study on Potential of Biogas Fermentation with Walnut Peel
Authors: Liu Jing Hui , Zhang Wu Di , Yin Fang , Liu Shi Qing , Liu Jing , Zhao Xing Ling , Xu Ling , Chen Yu Bao
Published: September 2013

Biogas fermentation with walunt peel was studied at 30°C by batch fermentation in this experiment. The experimental results show that walnut peel is a good raw material of biogas fermentation, and its potential is 195 ml/g TS or 217ml/g VS.
The Effect of Magnetic Field on the Deposition of Paraffin Wax on the Oil Pipe
Authors: Zhang Wei Wei , Wang Ting Ting , Li Xia , Zhang San Chuan
Published: September 2013

To prevent the deposition of paraffin wax during pipeline transportation, a huge amount of energy was consumed to heat the crude oil every year. So, magnetic paraffin control (MPC) technology was developed as an energy-saving method. In this study, magnetic effects on oil viscosity and wax deposition rate were examined experimentally. Results demonstrate that a decrease of 50% in oil viscosity and a decrease of 87.5% in deposition rate were achieved after magnetic treatment. In addition, the strong dependence of MPC performance on the distance of pipeline transportation as well as oil flow rate is also presented in detail. The present observations shed light on the mechanism of MPC method, and instruct its application on oil pipelines.
Multi-Response Optimization of TiC-Cu P/M Composite Physical Properties
Authors: Jie Yan , Jiang Kai Yong
Published: September 2013

the present study investigates the relationship of powder metallurgy (P/M) process parameters with the properties of TiC-Cu composite produced .The response surface methodology (RSM) was employed for developing experimental models. Analysis on process parameters using powder metallurgy (P/M) was made based on the developed models. In this study, titanium carbide percent (TiC %), balling time, sintering temperature are considered as input process parameters. The properties such as conductivities,bend strength and Vickers hardness were evaluated. Analysis of variance test had also been carried out to check the adequacy of the developed regression models. TiC-Cu composites are found to be more sensitive to balling time and TiC percent than other parameters such as sintering temperature.
Decision-Making Strategy in Scraped Automobiles Recycling Industry Based on Properties of Recycling Materials
Authors: Cheng Hui Qiang , Zhao Wen Yang
Published: September 2013

Scraped automobile is a kind of renewable resource with multiple value of development and utilization and variety of resources are used to make a car, such as iron and steel, non-ferrous metal, plastics, glass, rubber and so on, which can be recycled at the end life of vehicles. On the basis of learning the properties of recycling materials of scraped automobiles the paper makes a quantitative analysis on the possible maximum profit and conditions by constructing a decision-making model for automobile producers, which shows that no matter which kind of recycling mode the manufacturer chooses, the profit function is only related to four factors.
The Development Trends of the Computer-Nanocomputer Based on Nanotechnology and Properties of Nanomaterials
Authors: Guan Shi Jie , Zheng Xin Na
Published: September 2013

This paper is aim to introduce the research background and the significance of the computer . then forecast the computer development tends to super rapid, subminiature, parallel processing and intellectualization. Finally , the conclusion is reached that these new-type computers will produce deep impact on human societys development.
Study on Mechanical Properties of GF/PVC with CPE and ACR
Authors: Wang Sha Sha , Chen Ke Juan
Published: September 2013

Reinforce the strength of PVC by adding glass fiber, study the mechanical properties of PVC on different contents of glass fiber. With the increasing contents of glass fiber, the tensile and bending strength, impact strength are increased, but the breaking elongation is decreased. In order to further improve the toughness of PVC, do research on how to toughen the GF/PVC alloy, study the influence of CPE and ACR on GF/PVC. Use the method of blending modification of glass fiber, PVC and modifiers, significantly increase the impact strength and breaking elongation while maintaining the strength. Compare the influence of CPE and ACR on GF/PVC properties, make excellent strengthened PVC material.
Effects of Excess Bismuth Content on Microstructure and Electric Properties of Europium-Substituted Bismuth Titanate Thin Films
Authors: He Lin , Zhang Geng
Published: September 2013

Bi3.25Eu0.75Ti3O12(BET) thin films with various excess bismuth (Bi) contents (5, 10, 15, 20-mol%) were grown by a metal-organic decomposition method at 700 °C. Effects of excess Bi content on microstructure and electric properties of BET thin films were investigated. BET thin film with 10-mol% excess Bi content shows larger remnant polarization (66.3 C/cm2), better fatigue endurance (3% loss of 2Prafter 1.8×1010switching cycles), and lower leakage current density (1×10-7A/cm2) than those of other prepared BET thin films. Additionally, the mechanisms concerning the dependence of the properties on excess Bi content of BET thin films were discussed.
Analysis of the Reinforced Masonry on Shear Capacity
Authors: Yu Yang , Zhuang Xin Jun , Zhang Yun Feng , Yuan Zhao Qing
Published: September 2013

The reinforced masonry structure system is turned up as a new group of high-rise building structure type. This paper mainly researched the shear of reinforced masonry structure under earthquake. The maximum shears of the structure are calculated in X and Y direction by numerical analysis method. The changing of the shear bearing capacity is presented under three kinds of seismic waves.
Microstructure and Corrosion Properties of Mg-Zn-Ca-Zr Alloy for Biomedical Application
Authors: Jiang Dong Mei , Yu Tang Sheng , Jiang Dong Hua , Guo Liang , Cao Zhan Yi
Published: September 2013

The microstructuresandcorrosion properties of the as-cast Mg-Zn-Ca-Zralloys were investigated in this study. The results showed that the alloy was mainly composed of -Mg solid solution,Zr particle and the secondary phase of Ca2Mg6Zn3. The grain size of alloy specimens decreased with the increment of Zr content. The corrosion resistances were found to increase from 0.3% to 0.5% and then decrease from 0.5% to 0.7%. The Mg-4Zn-0.5Ca-0.5Zr had the best corrosion resistance in SBF solution.This was attributed to a combination of (1) the uniform and fine microstructure of alloy, (2) continuous distributions of the secondary phases, and (3) a lower volume fraction of Zr particles.
Experimental Study on Simply Supported Reinforced Concrete after Fire
Authors: Han Xiao , Zhao Dong Fu , You Zuo Kai
Published: September 2013

Aiming to provide reliable parameter basis for reinforcement and repairation of post-disaster design calculation and analysis, we conducted asimply-supported beam fire test and static load experiment. Respectively on the basis of experimental data, using graphic method, standard algorithm and the width of the folding subtraction, determine the equivalent stiffness beam after fire and the damage degree of mechanical properties. The specification of the experimental steps and the scientific calculation method provides guarantee for the accuracy of the final results.
Analysis of Crack Patterns of 500MPa Reinforced Concrete Beams
Authors: Li Zhi Hua , Su Xiao Zu
Published: September 2013

Fourting concrete beams reinforced with 500MPa longitudinal steel bars, of which 6 with skin reinforcement and 8 without skin reinforcement, were tested under two-point symmetrical concentrated static loading to investigate their crack patterns. Crack distributions in constant moment region of beams are compared. The propagation of side cracks along the beam depth is obtained. The results of this study indicate that the concrete cover of longitudinal tensile steel bars and the spacing of skin reinforcement has significant effect on crack distributions; substantial crack control in beams can be achieved if the spacing of skin reinforcement is limited to certain critical values. The curve of d-w(d is the distance between observation points of side cracks and tension face of beams, w refers to crack width at observation points) is approximately characterized by a zig-zag shape and concave-left near longitudinal tensile steel bars.
Study on Rain Water Drainage System Plan Based on SWMM
Authors: Gao Bin , Zhuang Bao Yu
Published: September 2013

How to plan and design a citys rain water drainage system reasonably to control a citys water logging arouses peoples concern in China. In an urban area of North China, a simulation model of rain water drainage system based on SWMM is built. Different schemes of rain water drainage system are evaluated and optimized.
Changes of Natural Frequencies of Industrial Steel Hall due to Simplifications of Numerical Model
Authors: Dulinska Joanna M. , Boron Pawel
Published: September 2013

The paper presents changes of natural frequencies of industrial steel hall due to simplifications or changes of numerical model. Firstly, the natural frequencies were calculated for basic Variant A of the numerical model of the steel hall which consisted of the main frames, footings, roof purlins and girts. In this Variant columns were fixed at bases, both purlins and girts were rigidly connected to main frames and designed as continuous beams. Then, in Variant B of the model columns were pinned at bases. Next, in Variant C different types of connections (semi-flexible joints) of roof purlins and girts with the main frame were implemented. Finally, in Variant D, soil-structure interaction was taken into consideration. The calculations of the dynamic characteristics of four abovementioned Variants of the numerical model of the hall showed that simplifications or changes of some details of the structure could result in significant errors in values of natural frequencies.
The Study on Heating Running Schemes of Solar Energy Combined with Municipal Heating
Authors: Ao Yong An , Li Gang , Kong Wei Xin , Feng Qi
Published: September 2013

The research, based on combination system of solar energy and municipal heating network, studied the running scheme of combination system of solar energy and municipal heating network through ways of experiments and theoretical calculation of the mathematical model. Firstly, the research established mathematical model of heat equilibrium of the combination system of solar energy and municipal heating network; secondly, keeping the indoor heat load steady, compared the dynamic heat load provided by solar collector with that needed by heated room at the same time,determined time spans of the network stopping service and the heat load added by the network within 24 h. In the research we took a heating period in a typical room in Shenyang for example, under the conditions of low temperature floor radiant with heating index standard of 50W/ m2 and 50°C of the average supplied water temperature, 40 °C of the return water temperature, calculated and verified the established mathematical model. The results include: when the heat load provided by solar collector is greater or less than the heat needed by the room, how many heat amount should be supplied by the running network and the amount of water flow within the network pipes correspondingly, and how long the network runs or stops. The final conclusions include: whether the running scheme of the combination system can save energy? the conditions of energy saving in running a combination system, and whether the system can bring environmental benefits.
Research of Post-Fire Mechanical Property of Steel Fiber Reinforced Ceramsite Concrete Filled Steel Tubes after Exposure to Fire
Authors: Tong Hai Lun , Wang Tian Hong , Lu Jian Qi , Wang Xin Tang
Published: September 2013

The post-fire axial compressive behavior of a set of steel fiber reinforced ceramsite concrete filled steel tubular short columns (noted as SFCC-SSC) was experimentally studied. Effect of the maximum value of fire response temperatures of the specimens and some parameters on the axial compression performance of the specimens was especially discussed. The results show that the surface of the steel tubes after fire presented dark red for 700°Cof furnace temperature and orange red for 900°C, and there was no obvious descending segment in post-fire load-displacement curves of the most specimens subjected to fire load. It was concluded that the axial bearing capacity of the specimens aftersuffering the furnace temperature of 900°C is much less than that of the specimens not subjected to fire load, and the volume of steel fiber of 0.5% of has the greatest effect on post-fire bearing capacity of specimens of SFCC-SSC.
Study of Post-Fire Axial Compressive Behavior of Self-Stress Ceramsite Concrete Filled Steel Tubular Short Columns
Authors: Lu Jian Qi , Tong Hai Lun , Xu Jin Can , Wang Xin Tang
Published: September 2013

The post-fire axial compressive behavior of a set of self-stress lightweight aggregate concrete filled steel tubes (noted as SSLC-ST) after exposure to fire was studied. Effect of the fire temperatures of the specimens and some parameters on the axial compressive behavior of the specimens was especially discussed. The results show that the initial circumferential strain of surface of the steel tubes is much larger than the longitudinal strain of the steel tubes, and the specimens of SSLC-ST have higher post-fire axial compression bearing capacity and better plastic deformation. It was concluded that the local buckling and overall failure of the specimens take place in succession while the specimens are axially loaded, and there are a lot of slip lines with angle of 45oon surface of the steel tubes.
Analysis of FRP Chimneys Liners under Wind and Seismic Load
Authors: Ding An Xin , Ni Ai Qing , Wang Ji Hui
Published: September 2013

Due to the increase of environment requirements, Fiber glass Reinforced Plastic (FRP) chimney liners are frequently used in coal-fired units. Wind and earthquake loads play an important role in the design of FRP chimney liners. Most of the engineering staff are still accustomed to accept single model, although, conjunctive model can reflect the effect of concrete cylinder on FRP liners and obtain more accurate internal forces of the liners under earthquake and wind loads. In this paper, a novel modified single model method is put forward to obtain accurate results.
Mechanical Behaviors of Square Timber Columns Reinforced with AFRP under Axial Compression
Authors: Yuan Shu Cheng , Dong Jiang Feng , Wang Qing Yuan
Published: September 2013

In order to apply original timber more effectively, the physical and mechanical properties of timber from camphor wood were tested. In total, seven square short timbers columns were fabricated, and then were reinforced by AFRP sheets with one, two and three layers in different reinforcing arrangements. The results showed that the columns with AFRP gave a great improvement in mechanical performance, and the loading carrying capacity, stiffness and ductility of the columns reinforced were also improved. The results also showed that the specimen with full wrapping of two layers of AFRP gave a higher deflection than the other ones. However, the load carrying capacity of the columns with AFRP arrangement decreased when the layers of AFRP sheets increased to three.
Wind-Induced Vibration Control of Benchmark Model with Damper
Authors: Fan Hui Neng , Lin Qian , Zhang Jian Lin
Published: September 2013

Based on 76-storey Benchmark model, the optimization objective including displacement reduction index and acceleration reduction index is given under the effect of wind-induced vibration, by which kinds of dampers are optimally designed based on Genetic Algorithm. The optimization results show that the peak acceleration, peak displacement and peak storey drift of structure are remarkably reduced and kinetic energy and deformation energy are reduced significantly. It means optimized dampers have achieved good effect on wind-induced vibration control of the structure.
A Construction Technology for Buildings Horizontal Movement
Authors: Liu Jin Ming
Published: September 2013

With the development of infrastructure--the gradual perfection of the urban layout and the broadening of the roads--some buildings have become obstacles in overall city planning. But for economic and cultural reasons, these buildings should continue to exist. Therefore, in this paper a technique for moving monolithic buildings is described. The technologys for moving the monolithic building includes: the construction of the track for moving; separating the buildings upper structure from the basic structure; hauling the building along the tracks; fixing the building on the new foundation.
The Different Pavement Combination Deflection Change Law Discuss
Authors: Gao Jian Hong
Published: September 2013

Based on the multi-layer elastic system theory, large general used finite element software is used to analysis in the paper. Among the three kind pavements, the flexible pavement maximal deflection and wheel gap deflection difference is most, and the rigidity pavement is least, and the semirigid pavement is centered. Whatsoever, under the same axis load, the surface layer bottom deflection diminish speed is quicker than the basic layer bottom deflection diminish speed after a sort along with the structure layer rigidity increase. Showing the pavement structure layer upside deflection is sensitive to the structure layer intensity and rigidity increase.
Static Load Test of Frame-Structure Slab
Authors: Su Jian Feng , Xu Yu Feng
Published: September 2013

Floor slab static load test is a important method to judge the performance and carrying capacity of the slab. This paper, with the background of a factory frame-structure slab, introduced the testing scheme, the details of the testing process as well as the test results. The testing cases provide a useful reference for the same type of project.
Application of Superiority Evaluation Method in Engineering Bidding Evaluation
Authors: Guo Zhang Lin , Yang Xiao Fan
Published: September 2013

According to Construction engineering bid evaluation is affected by many factors,the method based on extension superiority evaluation method and standard variance between-class method was proposed.First, in view of the characteristics of this project, evaluation system was constituted by eight indexes; Then the matter-element model based on superiority evaluation method was established so as to conduct bid evaluation of construction project. Finally, the superiority sort was gained. The result demonstrated this method has advantage of objectivity, practicability and high-efficiency.
Dynamic Response Sensitivity Analysis of Asphalt Pavement to Moving Point Loads
Authors: Zhang Xian Min , Sun Zhi Chao , Xue Hua Xin , Wang Ya Dong
Published: September 2013

Applying the basic three-dimensional finite element dynamic method, we analyzed the deformation and stress of elastic layered asphalt pavement under the moving point load, and calculated the central surface displacement when an aircraft passes by. We discussed the influence of speed and structural parameters on the maximum of dynamic deformation and stress, while summarizing the change law.
Preparation of Ti-Based Hybrid Membranes and its Application for the Removal of Copper(II) Ions from Water
Authors: Liu Jun Sheng , Zhou Xiao Long
Published: September 2013

A series of Ti-based hybrid membranes were prepared via sol-gel reaction using tetrabutyl titanate, [Ti (OBu)4] and tetraethyl orthosilicate (TEOS) as hybrid precursors. TGA and DSC thermal analyses revealed that these hybrid membranes have high thermal stability. Contact angle measurement shows that with an increase of Ti ingredient in hybrid membranes, their hydrophilicity decreased. The change in the surface color of sample adsorbed Cu (II) evidences that these Ti-based hybrid membranes can be used as adsorbents to adsorption separation copper (II) ions from Cu-bearing water.
Innovation of Utility Tunnel Nodal Design Taking Utility Tunnel in Laiyuan as Example
Authors: Wang Fang , Liang Lei , Han Hai Juan , Lu Yang
Published: September 2013

Urban utility tunnel is an important type of underground space development, and also it is the requirement of Two-oriented society. In Laiyuan utility tunnel design, combining with the engineering practice, the designers properly solve the problems of pipelines crossings, meanwhile meeting the needs of pipeline s crossings layout plan, management and maintenance.
Heat Damage of High-Temperature Rock Tunnel by Weighted Residual Method in Tibet Plateau
Authors: Ma Li Na , Yan Song Hong , Zhang Rong Ling , Li Tie Gen
Published: September 2013

According to the weighted residual method to deduce the finite element method of temperature field. The Jiwoxiga high-temperature rock tunnel on the Lhasa-Shigatse railway line is taked for example in the paper, then the actual drilling temperature data was combined to establish three-dimensional finite element model, the basic characteristics of temperature field was forecasted, the basic rule of temperature was obtained and the data can be compared with the actual data. It can provide references for the actual construction and ensure the similar engineering construction.
Mathematical Analysis on Helicoids Architectural Form
Authors: Yi Zhong , Yuan Cheng Zhi
Published: September 2013

In a sense, architecture may be called as a geometric figure. Although architectural forms are very different, the form from one kind of architecture to another kind of architecture is equivalent to one kind of mathematical transformation in view of mathematics; for example, the transformation between a cube architecture and a spherical architecture belongs to a topological transformation. Currently, many sculptural features appear in the architecture design, which may be called as the nonlinear architecture. Curves and curved surfaces are widely used in the architecture modeling. Moreover, functional spaces are divided inside the architecture shell according to requirements. Architects are inclined to use a mathematical theory especially the geometrical knowledge in an architecture design. However, architects can not imagine many artistic geometric figures in geometry. Besides, such wonderful geometric figures always include some miraculous mathematical and physical properties.
The Composition and Uses of the Building Material
Authors: Zhang Zhi Jun
Published: September 2013

The building products were made from various materials, which are fitted in architectural hardware and decorative hardware parts of a building. This paper introduces the category of the building material, including naturally occurring substances and man-made substances. Building material is any material which is used for construction purposes. The manufacture of building materials is an established industry in many countries and the use of these materials is typically segmented into specific specialty trades
Research Progress of Self-Cleaning Architectural Coatings
Authors: Zhang Zhong Qiang
Published: September 2013

At present, self-cleaning architectural coatings is one of important type of specific function coatings. Those play an important role in protecting and decorating the buildings. Research progress of self-cleaning architectural coatings was reviewed in this paper.
Stability Analysis on Surface Layer of an Expansive Clay Slope with Consideration of Expansive Pressure
Authors: Cao Xing Song , Zhou Yang , Liu Shi Xiong
Published: September 2013

Weathering effects, expansive pressure and pore water pressure are investigated to evaluate their effect on expansive clay slope stability. In particular, the effect of expansive pressure is analyzed to consider its effect on the stability of surface layer of the slope. In this paper, the distribution of expansive pressure in a slope is evaluated and used to analyze the stability of the surface layer of a clay slope. The proposed analysis method is applied in the third ring road project in Chengdu, China, where there are expansive clay slopes. Reasonable results are achieved.
Research on Template Concrete Board Security of Early Removal Connection Attached Support-System
Authors: Zhao Fu Long , Tian Yong , Li Qing Ping , Wang Xiao Li
Published: September 2013

The template support-system projects not only need to complete the range of quality optimization in one construction work, but also to make one of the sound security work. Installation and removal of template support-system are the largest amount of labor. To seek the template works rationalization and reduce the cost of the template works, it is an important way to save a lot of labor and reduce the cost of concrete structure. Therefore, how to improve the template engineering design and its production, installation, operation and removal efficacy effectively and make further reform of the template project for improving the quality of the project are of great significance in the construction of civilization.
Research on Surface Overpressure and Deformation of Underground Frame Beam under Internal Blast Loads
Authors: Li Tian , Jiang Qiao Ying
Published: September 2013

The finite element model of a separately built one-storey underground frame was set up with software ANSYS/LS-DYNA and numerical simulation was done to study on surface overpressure and deformation of the underground frame beam under internal blast loads. It is found that the overpressure peak values on the beam end and middle surface are both much higher when the explosive is below the middle of beam and the peak on the middle surface goes up with the increment of explosive height while that on the beam end surface is not sensitive to the height. The numerical result also indicates that the soil around the frame nearly has no effect on surface overpressure of the frame beam. However, whether there is soil or not the beam deformation has much difference and the increment of the deformation is closely all the same for different soil thicknesses but under the circumstance of thicker soil the beam obtains less deformation upward in a short time after explosion.
Stury of Post-Failure Constitutive Relation Based on SMP Criterion
Authors: Zhu Jian Ming , Wu Ze Xiang , Zhao Qi , Yang Chong
Published: September 2013

In this paper, based on SMP criteria, combination of strain softening of rock material mechanics theory, the after peak friction angleφfor the intermediate variables, the residual strainεto express the after peak nonlinear elastic modulusE, and finally establish a unified non-linear constitutive model of the rock peak residual stress. Combination Xiao Guanzhuang Eastern Mine typical breakdown rock of diorite triaxial test , get stress-strain curves for different confining pressures by this model. It shows that peak constitutive relation of this study can simulate the experimental results, prove the rationality of the model.
Characterization of Heavy Metals in the Surrounding of Municipal Solid Waste Incinerator (MSWI) and Health Risks Assessment via Inhalation in Shenzhen Nanshan, China
Authors: Zhang Hai Long , Chen Yong Heng , Qi Jian Ying , Lin Bi Gui , Fang Jian De
Published: September 2013

Take the Shenzhen Nanshan Municipal solid waste incinerator (MSWI) as the object, in total 18 ambient air samples were got. The study analyzed the distribution characteristics of ambient air heavy metals (Cu, Cd, Pb, Cr) and As in the surroundings of the MSWI. The EPA Risk Assessment Guidance for Superfund (RAGS) was used to assess the exposure risk. The results demonstrated that the Pb and Cd value in the surroundings of the MSWI were in the accept level according to the Ambient Air Quality Standards (GB3095-2012); The risk assessment showed that the carcinogenic and non-carcinogenic risks via inhalation exposure in the sorrounding of the MSWI were in the accessible levels.
Characteristics Analysis of Solar Radiation Distribution in Hefei Region
Authors: Liu Cai Xia
Published: September 2013

The paper analyzes the hourly variation of total solar radiation, total perpendicular incidence and radiation intensity of Hefei region in typical years. The change characteristics of total solar radiation and total perpendicular incidence in Hefei region are discussed in the paper. Chose seven cities in different resource areas and Hefei region and compared with the resource situation of solar energy, the paper discovers the distribution regularity of solar radiation intensity in Hefei region, then points out the solar resources are relatively rich in spite of Hefei is located in common solar resource belt area.
Research of Agricultural Non-Point Source Pollution and Prevention Measures
Authors: Shen Pei Pei , Yang Lu Hua , Guo Zi Peng , Liu Hong Chao
Published: September 2013

With the effectively control of the point source pollution, non-point source pollution has become the most serious pollution source in our country. In addition, the agricultural non-point source pollution control has become the most important part of the environmental protection. By referring to related journals, this article makes a comprehensive analysis on definition, characteristics, mechanism, harm and prevention countermeasures of agricultural non-point source pollution.
Based on the Tropical Island of Hainan Land Use Types IDRISI Spectral Characteristics
Authors: Zhang Kun , Wang Hai Feng , Li Zhuang
Published: September 2013

According to the tropical island of Hainan land use types of the actual situation, conduct targeted training to choose, determine the object of study by IDRISI software and technology by means of the spectral characteristics of the data obtained by the calculation analysis and feature comparison, the data conclusions, so as to Next to study land use type data base.
Cultural Planning for Urban Spaces: Cultural Turn of Contemporary Urban Planning
Authors: Huang Ling , Zhao Wan Min
Published: September 2013

Urban cultural crisis becomes a common phenomenon under the background of current globalized wave and rapid urbanization; the traditional city planning emphasizes on shaping material spatial form and lacks deep understanding and respect towards city culture, leading to the loss of city characteristics. It mainly because the cultural values of the urban planning are not clear and the urban spatial planning is divorced from cultural planning seriously. This paper starts with the cultural duality of urban space, puts forward that it is inevitably logical to integrate the cultural planning into the urban planning system; It discusses the theories and methods of cultural planning for urban spaces from the target system construction, main content and operation system, stressing that the core of cultural planning for urban spaces is the combing of cultural spatial factors and spatial cultural structure, then propounds the way to melt it into existing city planning system to enhance urban planning to the new stage of cultural consciousness and initiative.
The Practice of the Symbolic Significance in Landscape Design
Authors: Li Yan
Published: September 2013

The symbolic design of the landscape reflects the cultural relationship between human and society, human and nature, the exploration and the practice of landscape significance is one of the most basic activities that human can know the world and the nature, expressing humans thoughts, it can deeply understand the symbolic design of the landscape in contemporary urban city and know the importance of the innovation by means of understanding the symbolic significance and symbol in different contexts.
Study of SMA as Protective Colloid on the MF-Resin Micro-Encapsulation
Authors: Zhen Zhao Hui , Dong Cui Hua
Published: September 2013

The paper studied the effects of SMA as protective colloid on emulsification and micro-encapsulation process in the preparation of MF-resin microcapsules. The results indicated that pH value and the dosage of the SMA had important effects on zeta value and micro-encapsulation. The SMA dosage, emulsifying time and stirring rate influenced the capsule preparation, mean particle size and particle size distribution of microcapsules. The diameter became smaller with the increase of the amount of protective colloid. The applying amount of the SMA had an optimum value. The zeta potential just after emulsification was much larger than after reaction of MF in the preparation of microcapsules.
Microwave Extraction of Triterpene Glucoside from Fructus Leonuri
Authors: Lv Gang , Ming Zhu , Shen Ye , Li Tan , Sun Xin
Published: September 2013

In the present study, a new method of microwave-assisted extraction (MAE) has been used to extract triterpene glucoside from Fructus Leonuri. Various experimental conditions, such as microwave radiation time, microwave power, liquid/solid ratio and grinding degree of material were investigated. Optimal conditions of MAE of triterpene glucoside were determined as: duration of microwave radiation 5min, microwave power 495W, size of raw material less than 0.15mm, and ratio of liquid to solid 30:1. Comparing with conventional heating extraction, MAE of triterpene glucoside from Fructus Leonuri showed advantages of less time and high extraction rate. The time used with MAE is only 5 min with 76.56% extraction rate, while the conventional extraction method took two hours with about 68.46% extraction rate. This novel method is suitable for fast extraction of triterpene glucoside from Fructus Leonuri.