bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation of High-Rigidity, High-Toughness Unplasticized Poly(vinyl Chloride) for Plastic Windows Profiles Reinforced and Toughened by Nano-CaCO3
Authors: Yang Ming Shan , Li Lin Kai
Published: August 2011

The organic-inorganic complex nano-particles with core-shell structure were synthesized by in situ emulsion polymerization based on fresh slush pulp of calcium carbonate (CaCO3) nanoparticles and acrylate polymer in this paper. The dispersion and encapsulation of nanoparticles were investigated by transmission electron microscopy (TEM). Unplasticized poly(vinyl chloride)(UPVC) was modified by organic-inorganic complex nanoparticles and the effects of toughening and reinforcing were systematically studied. The results showed that the effects of the reinforcement and toughening of organic-inorganic complex nanoparticles on UPVC were very significant. Especially, scanning electron microscopy(SEM) analysis results indicated that large-fiber drawing and network morphologies coexisted in the system of UPVC by joint modification of nanoparticles with CPE.
Study on Strength Characteristics of Reinforced Soil by Cement and Bamboo Chips
Authors: Huang He , Jin Shao Hong , Yamamoto Haruyuki
Published: August 2011

Soft ground with low bearing capacities is found to large areas in the world. In order to increase the bearing capacity of soft ground and to decreases settlement, some methods were developed for improving the mechanical properties of ground. As a stiffener of soil improvement, bamboo chips were used in this study. Bamboo is one of the fastest-growing plants on Earth and with a large distribution around the world. As a natural material, it is even better for environment and has excellently mechanical characteristic. The bamboo chips were mixed into the test specimen as a stiffener of soil improvement. Unconfined compression test were performed with test specimen, then mechanical characteristics of reinforced soil by cement and bamboo chips were investigated. From the test results, the strength and ductility characteristic of soil improvement are rather better when the bamboo chips are mixed.
Comparative Study on the Post-Liquefaction Behaviour of Saturated Sand and Sand-Gravel Composites
Authors: Chen Guo Xing , Pan Hua
Published: August 2011

With the fast development of rail rapid transit, stability and deformation control of subgrade are attached much more importance,meanwhile, researches on the liquefaction and post-liquefaction characteristic of sand and sand-gravel composites come to be very significative. The saturated Nanjing fine sand and sand-gravel composites samples were liquefied under the earthquake loadings simulated by the Hollow cylinder apparatus of GDS, after that, the post-liquefaction samples were subjected to stationary loading. This research is mainly concentrated on the characteristics of stress-strain relation of the two materials. It is found that the stress-strain responses are composed of three stages, including the low intensive strength stage, the superlinear strength recovery stage and the sublinear strength recovery stage. The comparison results of the behaviour of large post-liquefaction deformation between saturated sand-gravel composites and Nanjing fine sand showed : the low intensive strength stage and the superlinear strength recovery stage of saturated sand-gravel composites are shorter while the sublinear strength recovery stage is longer. Based on the tests results, a stress-strain model was established respectively according to Nanjing fine sand and sand-gravel composites , in which the initial confining pressure and the relative density can be considered synthetically. And it was found that the predicted results by the models proposed in this paper were in good agreement with experimental datas.
The Application the Concept of Low-Carbon in City Planning
Authors: Long Zhuan Fang , Li Yue E , Liu Dao Wei
Published: August 2011

With the background of global warming and energy crisis, the low carbon economy and low carbon city gradually call people’s attention. The core of low-carbon city and economy is to reduce carbon emissions and energy consumption. A low-carbon city relies on its low-carbon city planning. This article analyzes the connotation of low-carbon city and puts forward the notion of using low-carbon ideas in planning industrial structure, road transport planning and layout of the city to construct a better city.
Research on Sustainable Management of Building Materials in China
Authors: Tang Xiu Ying , Zhang Tian Hui , Leng Xue Mei
Published: August 2011

With the development of economy and growth of population, China’s building materials has seen tremendous growth in recent years, more attention is paid to help manage the sustainability challenges of building materials. This paper tries to build a conceptual framework to integrate The Natural Step Framework, Life Cycle Assessment and Ecological Footprint and attempt to analyse how it works in the management of a sustainable transition.
The Problems and Suggestions of Sustainable Development in Wuhan"1+8" City Cluster Area
Authors: Xu Hong
Published: August 2011

Wuhan city circle or Wuhan"1+8" city cluster area is one of the most important development strategies of city group in the central China. Wuhan"1+8" city cluster area has brought unprecedented opportunities and challenges to sustainable development by a comprehensive reform in a special resource-saving and environment-friendly society policy. The ddevelopment of Wuhan"1+8" city cluster area not only benefit the development of Hubei Province, but will also have a positive impact on the surrounding provinces such as Hunan, Henan, Jiangxi, and Shanxi. This paper discusses the opportunities and challenges of sustainable development in Wuhan"1+8" city cluster area from several perspectives and provides some suggestions and policies for the sustainable development in Wuhan"1+8" city cluster area
The Development Process and Prospects of Mine Surveying in China
Authors: Wang Gang , Guo Guang Li , Zha Jian Feng , Liu Bing Fang
Published: August 2011

Mine surveying is an important part and infrastructure protection of mine production and mine construction, and it is also very important basic work of coal mine safety production. This article summarized the development process of China's mine surveying for 60 years, the development process of China's mine surveying was from Transit Times which angling and distancing separately to Electronic Total Time which angling and distancing combo. Today, China's mine surveying has developed into an information science which combines with measurement and optoelectronic technology, computer technology, global positioning system (GPS), geographical information system (GIS) , remote sensing (RS) , D-InSAR and Unmanned Aerial Vehicle Remote Sensing with the rapid development of science and technology. This paper also analyzed the development status, opportunities and challenges-digital of China's mine surveying , and pointed out its development direction and what measures should be taken.
Interface Shear Stress Analysis of Concrete Beam Strengthened with CFRP
Authors: Zhou Yong Chao , Sun Tie Jun
Published: August 2011

Based on elastic theory, the four basic assumptions and the failure model of concrete beams strengthened with CFRP, deduced the formulae about the concrete beams strengthened with CFRP with concentrated load. Results show the biggest interface shear stress is at the at the anchor end, it not only relate to the material property of CFRP and concrete, but also to the thickness, width and bending moment at the anchor end etc.. Reducing CFRP stiffness and thickness or increasing viscose layer thickness, these can reduce the maximum interface shear stress at the end of anchoring.
Experimental Investigation on Dynamic Characteristics of NOPD Thin-Wall Frame Structure
Authors: Zhao Ling , She Guang Yu
Published: August 2011

The free vibration experiments for the NOPD frame structure were performed to investigate the dynamic characteristics of the frame. The influences of factors such as particle filling ratio, particle filling scheme and vibration direction of the frame on the damping effect are discussed by means of test data. Test results indicate that the particle filling ratio is a principal influencing factor for the damping effect of the frame. Under the same particle filling scheme and filling ratio, the damping increments for out plane vibration of the frame with smaller structural rigidity are normally larger than those for in plane vibration with larger structural rigidity. Within the three schemes of particle filling, the most prominent damping improvement exists in the particle-in-beam scheme under the same filling ratio and the corresponding maximum damping increment reaches 218% for out plane vibration. To obtain the most significant particle damping effect, the most effective scheme of particle filling is to put particles into the cavities of components with large vibration displacement.
A Study on the Planning Method of Underground Space in Urban Core District - Taking Hangzhou Eastern New City Zone as an Example
Authors: Zhang Cheng , Wang Si Wei
Published: August 2011

Nowadays, Underground space exploitation is one of the directions of the main focus in the construction of Hangzhou. This paper comprehensively introduces the schematic design of the underground space exploitation of Hangzhou east station, combined with the underground space development project of the core area in Hangzhou eastern new city zone. Firstly, the background of the surrounding area is discussed to illuminate the important status of the core area of eastern new city zone in Hangzhou’s future construction. Then, the holistic design concept and construction goal of the underground space exploitation of the core area are presented, and its functions and layout are clarified focusing on the railway construction and circumjacent exploitation project of Hangzhou east station. Lastly, the executive plan about the underground space exploitation of the core area of Hangzhou eastern new city zone is expatiated comprehensively.
Detection Device and Method for Thermal Insulating Properties of Exterior Windows of Building
Authors: Hao Wen Ge , Li Yan , Li Meng Cheng
Published: August 2011

In order to assess thermal insulating properties of exterior windows of building objectively, a detection device for thermal insulating properties of windows was designed scientifically according to the requirement of national standard. The design plan of detection device was introduced. The detection principle of the device and the calibration method of the system were discussed, and the error analysis for the result was also made. Accurate quantitative-detection of thermal insulating properties of exterior windows of building has been achieved, which provides an important technical safeguard for energy saving of building.
Seismic Isolation Design for Approach Spans of Suiwei Bridge in Wenchuan
Authors: Zhu Wen Zheng , Xu Zhong Gen
Published: August 2011

The process and thought for the approach bridge of Suiwei bridge design using the method of isolation and energy dissipation were proposed in this paper. The concept of protecting a bridge from the damaging effects of an earthquake by introducing isolating bearings to isolate it from the moving ground is an attractive one. Firstly, the sizes of the laminated rubber bearings and the dia- meters of lead plugs are calculated with static analysis. Then the internal forces of the piers and the damping ratio of the isolated bridge needed to restrict the seismic deformation to 8cm during earth- quakes with seldom intensity were calculated using the Response Spectrum Method, and the result verified with dynamic time history method demonstrates that the Response Spectrum Design Method can restrict the girder displacement to 8cm during large earthquake and reach the goal of 25 percent shock reduction. The design process can be of reference to the bridge design with isolation and energy dissipation.
Evaluation of Main Code Models for Predicting Flexural Load-Bearing Capacity against Intermediate Crack-Induced Debonding in FRP-Strengthened RC Beams
Authors: Li Gui Bing , Guo Yu Gang , Sun Xiao Yan
Published: August 2011

Intermediate crack-induced debonding is one of the most dominant failure modes in FRP-strengthened RC beams. Different code models and provisions have been proposed to predict intermediate crack-induced debonding failure. Out of all the existing code provisions and models, four typical ones are investigated in the current study. A comprehensive comparison among these code provisions and models is carried out in order to evaluate their performance and accuracy. Test results of ﬂexural specimens with intermediate crack-induced debonding failure collected from the existing literature are used in the current comparison. The effectiveness and accuracy of each model have been evaluated based on these experimental results. It is shown that the current recommendations are inadequite to effectively mitigate intermediate crack-induced debonding in flexurally strengthened members.
Evaluation of Allowable FRP Tensile Strain in Main Codes for Mitigation of Debonding Failure in FRP-Strengthened RC Beams
Authors: Li Gui Bing , Guo Yu Gang , Sun Xiao Yan
Published: August 2011

Intermediate crack-induced debonding is one of the most dominant failure modes in FRP-strengthened RC beams. Different code models and provisions have been proposed to mitigate intermediate crack-induced debonding failure. Out of all the existing code provisions and models, six typical ones are investigated in the current study. These available guidance for mitigating debonding failure of externally bonded ﬁber reinforced polymer composites applied to concrete is evaluated based on data obtained from experimental programs. It is shown that the current recommendations are inadequate to effectively mitigate intermediate crack-induced debonding in ﬂexural members.
Experimental Study on Critical Flow Conditions Causing Damage of Grass-Covered Revetment
Authors: Zhong Chun Xin
Published: August 2011

Flexible vegetations supply great effect on river bank protection. It is important to study the critical flow conditions, including bed shear stress, scour duration and frictional velocity etc, causing damage of grass-covered revetment. Laboratory experiments prove that, destruction of turf can be estimated by observing the variation of water head. The experimental shear stress above vegetation zone has nonlinear relation with velocity square, which agrees with theoretic derivation. Before the turf destruction occurring, shear stress above vegetation zone increases with the scour duration and then goes to stabilization. This mentioned Shear stress will change suddenly when local scour damage happens, or keep stabilization while affine damage is on-going. Under the same flow conditions, the critical bed shear stress of reinforced turf is larger than that of natural turf. As far as the same-form revetments are concerned, the bed shear stress at breaking point increases with the flow velocity.
The Dynamic Characteristics of a Couple System by Pedestrian Bridge and Walking Persons
Authors: Wang Dong , Gao Shi Qiao , Kasperski Michael , Liu Hai Peng , Jin Lei
Published: August 2011

The human body forms a complex dynamic system with more than one natural frequency and provides considerable damping capacities. In a simplified approach active persons can be modeled as external loads. While this approach may be sufficient for an activity like jumping, it has been shown already that for a bobbing person some interaction effects may occur. The question arises if also pedestrians are able to influence the dynamic characteristics of the structure they are actually crossing. Observations during a mass event with several thousand persons crossing a 66 m long bridge indicate that the damping capacity of the coupled structure may have increased. In this paper a single beam experiment was operated. The basic idea is to use a known background excitation induced by a shaker. It can be seen that both natural frequency and damping ratio have been changed comparing with empty structure. The change with passive person is stronger that an active person. Meanwhile, the linear sweep method which was used in measurement provides a good result for the analysis of dynamic properties of a structure.
Research on Moment Modulation Coefficient of Unbounded Prestressed Concrete Continuous Beam
Authors: Yang Chun Feng , Yang Min
Published: August 2011

Through simulation analysis of nonlinear finite element, research ideas on moment modulation coefficient of unbounded prestressed concrete (UPC) continuous beam is proposed ；Based on detailed analysis of the equivalent length of plastic hinge and curvature ductility, the two factors which influencing margin of moment modulation, calculating formulas of curvature ductility coefficient and moment modulation coefficient are established; Compared with the experimental data, the results which provided basic data for further research on plastic design of UPC continuous beam.
Safety Analysis of Tunnel in Gob of High Steep Thick Coal Seam (I) - 2-D Numerical Simulation for Response
Authors: Lu Wen Bin , Wu Yi Min , Chen Jie , Fu He Lin
Published: August 2011

Taking Wusongshan Tunnel in Tongling City as an example, two-dimensional numerical simulation of new large span highway tunnel directly through gob of steep coal seam were carried out to study the response of surrounding rock induced by mining. The actual location and scale of the ground fissure consistent well with the simulation results, which verified the analysis. The results showed that, different from those in gob of horizontal or gently inclined coal seam, the response of surrounding rock in gob of steep coal seam have the following characteristics: (1) shallow mining affects significantly on the values of settlement of earth surface and the tunnel, and deep mining on the scope; (2) in the shallow layer, a small scale coal being reserved or being effective filled after excavation can benefit greatly to the safety of structure and stability of the surrounding rock; (3) sharper uneven settlement would occour at the floor than the roof of coal seam, which can threaten the tunnel structure and should attract more special attention; (4) for this project, deep faults affect the safety of structure of tunnel and stability of surrounding rock also. Based on these results, treament plan were developed of Wusongshan Tunnel, which can also be refered for other similar projects.
Safety Analysis of Tunnel in Gob of High Steep Thick Coal Seam (II) - 3-D Numerical Simulation for Mechanics of Initial and Secondary Support Structure
Authors: Lu Wen Bin , Wu Yi Min , Chen Jie , Fu He Lin
Published: August 2011

Taking Wusongshan Tunnel in Tongling City as an example, three-dimensional numerical simulation of new large span highway tunnel built directly through gob of steep coal seam is carried out to study the response of tunnel structure induced by mining. The results showed that, (1) Though immediately backfilling after extraction can prevent the tunnel structure from impact of mining below the tunnel, it is still necessary to forbid extraction below the tunnel consildering the duration time of the extraciton and backfilling activity. (2) Considering the long-term settlement of gob of steep coal seam, net height of the tunnel should be enlarged 50cm to ensure enough space for operation. (3) The tensile and pressive stress of the support structure in the bottom and roof section of the gob are obviously high than other, so comperihencive measures should be taken to reinforce the structure, especially to increase the tensile strength in axial direction. (4) Fortification intensity can be reduced but the fortification should be enlarged if the continuous reinforcement by steel bar is used at the radial construction joints. Based on these results, treatment plan were developed for Wusongshan Tunnel, which can also be refered for other similar projects.
Experiment Research on the Mechanics Properties of Urban Garbage Blocks
Authors: Luo Xing Wen , Yao Hai Lin
Published: August 2011

A municipal solid waste treatment method named stacking landfill of garbage block is brought forward. Garbage blocks were made and a series of tests have been carried out by orthogonal tests method in lab. Test results indicate the early compressive strength of garbage blocks increases quickly, and more slowly in the later period. The compressive strength for 3 days curing age is about 40% ~ 45%s of that for 28 days curing age. The compressive strength for 5 days curing age is about 50%~ 60% of that for 28 days curing age. The compressive strength for 7 days curing age is about 60%~70% of that for 28 days curing age. The rank of the influence degree of the accession material to the compressive strength for 5 days curing age was are the mass of cement, the mass of waste type, compressive stress size, the mass of water, the mass of lime. Stacking landfill of garbage blocks differs from traditional landfill disposal which is a new type of classifier ecological landfill method. It can effectively reduce the volume of urban waste, and the waste can easily be stored and disposed.
Effect of External Wall Insulation on Building Energy Consumption
Authors: Liang Qing , Liu Jian Fei , Liu Jing , Xu Gang
Published: August 2011

The building energy consumption associated with the external wall insulation for different orientations and different exterior finishes has been evaluated using the simulation software EnergyPlus. The results suggest that in certain condition the thermal resistance of the external wall and the absorptance of the exterior finish should be high for heating dominated climate or room, while both of them should be low for cooling dominated climate or room for saving energy. Besides, it has different annual electricity savings for different external wall orientations at the same thickness of thermal insulation, so the insulation should be priority used for the external wall which has the largest saving potential.
Numerical Simulation Analysis of the Construction Mechanics in the Process of Tunnel Excavation
Authors: Li Dong Bo , Zhao Dong , Liu Chun Yan
Published: August 2011

Based on the Wanshan tunnel project located between Hefei and Fuzhou, the paper numerically simulates the excavation process of six-step CD method using the technology of element birth and death of finite element software ANSYS. And the soil stress, soil displacement and deformation are analyzed, which can provided a reference for similar engineering.
Seismic Response Modification Factor of Eccentrically Brace Steel Frame
Authors: Shen Yong Kang
Published: August 2011

Seismic response modification factor (R) and displacement amplification factor (Cd) are very important parameters to compute seismic force and to verify elasto-plasticity deformation in advanced seismic design. According to the present China Code for Seismic Design of Buildings,15 eccentrically braced steel frames are designed. R & Cd of 15 samples are computed by the Capacity Spectrum Method (CSM).Some correlative factors are analyzed and some reference is presented to the seismic design of these structures.
FEM Simulation of an Elliptical-Shaped Corrugated Steel Culvert Pipe for Highway Construction
Authors: Yue Feng , Wen Xue Jun
Published: August 2011

In this paper, we discuss the design and calculation methods of elliptical-shaped corrugated steel culvert pipe (ECSCP) used in highway construction. With many advantages such as lightweight, environment friendly, cost-effective, rapid construction, etc., corrugated steel culvert pipe (CSCP) have been widely used in highway construction acting as the alternative of RC culvert in China in recent years. The ECSCP in this paper is a kind of culvert which is fabricated to an elliptical shape with several pieces of corrugated steel plates which are jointed by high strength bolts. This study is conducted on the basis of the ECSCP used in the construction of Shanghai North Outer Ring Line Highway in China. 3D FEM analysis is performed considering several parameters such as modulus of elasticity of the surrounding backfill soil, length of major and minor axis of elliptical-shaped section, eccentricity of vehicles. Some design methods are proposed in this paper, and they will be useful guidelines for safe design of ECSCP.
Lattice Concrete Wall Structure Optimization and Numerical Analysis
Authors: Meng Xian Hong , Zhou Chan Fang , Zhou Jing Hai
Published: August 2011

Polystyrene formwork of lattice concrete wall is a set of lightweight, insulation, sound insulation, fireproof, bearing multi-function in one of the "EPS new energy-saving" wall structure system. Through the polystyrene formwork structure forms of optimized improvement built in construction process of collapse produced high wall plate phenomenon. Do an axial compression ratio of 0.2 lattice specimens of reinforced concrete shear wall in axis pressure and reciprocating level forces test. The damage form of that wall for wall bottom beam-column central cross core ring crack and appear "X" type crack and are crushed. The mesh wall formed strong vertical limb and weak horizontal limb，belongs to the ductility structure , and has more yield , and energy dissipation capacity , and wall overall performance is strong , and avoid brittle failure , and has good ductility、deformation ability and bearing capacity of the characteristics of big .The finite element analysis and experimental results indicated that the ultimate bearing capacity of the wall are the same. For new formworks do wall by finite element analysis, in do not affect its aseismic capacity premise that wall structure forms are optimized design.
Research on the Eco-Lighting of Dwelling House
Authors: Dai Fei
Published: August 2011

The building of the dwelling house has been paid much attention after the reform and opening policy. In recent years, people are aware of the concept of low carbon and ecology. This article analyzes the exsisting situation, necessities and energy-saving strategies of eco-lighting design for sustainable development and environment protection of dwelling houses.
Research on Foaming and Interface of the WPC Cushion Packaging Material
Authors: Cao Bin , Xiao Sheng Ling
Published: August 2011

Base on the discussion of the wood-plastic composite cushion packaging material progress at home and abroad, this article analyzes foaming mechanism, process conditions and methods on how to improve interface compatibility in preparing WPC material. Point out that bubble quality control during the foaming nucleation stage, the proportion of the compound blowing agent, process condition selection and interface modification are the Key issues in research of the WPC cushion packaging material.
Study on Failure Pressure of Corroded Submarine Pipeline under Earthquake
Authors: Sun Li , Zhang Xin Shou , Sun Qian Qian , Chen Bo Wen
Published: August 2011

Many marine oil pipelines are subject to varied degrees of corrosion, which gradually increases the leakage and fracture and other accidents. Because the marine pipelines are located in the complex environment and there are many forms of corrosion, the paper only studied parts of the corrosion. The finite element software was used to analyze the failure pressure of internal corroded pipeline under the earthquake, so as to provide the basis for appraisal of corroded marine pipeline.
Experiment of Beam Crack Repair Using Shape Memory Alloy
Authors: Yang Qing Ping , Sun Li , Feng Yan Zhong
Published: August 2011

In this paper, the repair capacity of SMA wire by using internal and external installation was studied. The SMA wires were embedded in epoxy resin and silicon cement mortar beams made of polymer clay, and then three-point bending test was conducted on the composite beam. The ability of beams which embedded SMA wires was also studied. On the other hand, the SMA wires were installed in the external of the epoxy polymer clay cement mortar, then three point bending test was also used and its self-repair ability was also studied. The results show that the crack can be repaired very well under these two methods. If there are cracks in existing buildings, we can use an external installation method to repair them. In order to ensure the new buildings crack free, both methods are feasible.
Interaction Analysis of the Superstructure and Raft Foundation for Tall Building with Podium
Authors: Wu Chong Fu , Liu Shu Hong
Published: August 2011

Based on the three-dimensional computation model, the actual project ,a high-rise building with podiums on the jointless raft foundation, is made nonlinear numerical analysis, which aims at studying the characters of superstructure-foudation-soil’s interaction, and analyzing the stress features in raft foundations under the former interaction , the distribution of stresses on foundation plate，and the range of stress dispersion about subgrade reaction. Through the factors, which can affect superstructure-foudation interaction, are analyzed , such as superstructure’s stiffness, foundation’s stiffness and soil’s stiffness. Then, the distribution rule of stress and deformation about superstructure-foudation interaction. Which can provide some calculation basis for this kind of foundation design.
Several Application Methods Researches of the Solar Technology in the Architectural Design
Authors: Tao Li , Zhao Zhi Qing
Published: August 2011

This paper comprehensively summarized the development of solar technology, across-the-aboard analyzed the application of solar technology in the architectural design. According to the practical application of solar technology of the world, particularly China, it systemically described a variety of experience, trends and the key issues of the technology applications. It described three stages of technology development in detail, and specifically in-depth analyzed the solar photovoltaic devices and the building integration, put forward the feasible development strategy. This was very significant for erecting a low-carbon world.
Calculation Analysis of Strengthening Arch Bridge Structure Based on Release Energy Method
Authors: Jin Qing Ping , Wang Xian Bao , Li Xue Jun
Published: August 2011

The arch bridges were used widely for the good performance under the pressure in China. It was very sensitive to some factors as temperature , settlement etc so that the arch bridges occurred the disease, carrying capacity reduction or even structure destruction etc.In the paper, based on the characteristics of masonry arch bridges, reinforcement method was analyzed, according to the situation of a masonry arch bridge, release energy method was applied to strengthening project. By comparing the stress and the strain before and after the strengthening project, some conclusions could be drawn that the bridge structure carrying capacity had been raised, the energy accumulated in the bridge structure was released, the structure safety margin was improved.
Travel Distance Prediction of Landslides Triggered by the M8.0 Wenchuan Earthquake
Authors: Li Xiu Zhen , Kong Ji Ming , Li Sheng Wei
Published: August 2011

Volume and slope are two important factors affecting the runout distance of landslides. Field investigation on 46 landslides triggered by the Wenchuan earthquake show that there are positive linear correlations between the logarithmic values of landslide volume and travel distance. And there is also a positive linear relationship between the equivalent friction coefficient and tangent value of initial slope angle for the landslides. On the basis, we obtained an empirical-statistic equation between the horizontal and vertical travel distance, the volume and initial slope angle. This can provide a basis for prediction of earthquake-induced landslides.
Urban Cultural Route: New Idea for Urban Community Renewal - Case Study on Yuzhong District in Chongqing
Authors: Huang Ling , Xiao Hong Wei , Xu Jian Feng
Published: August 2011

Under the rapid development of urban modernization, old residential communities in big cities are facing the trends of disintegration of social relationships and crisis of community culture. By introducing the concept of " Cultural Route " which is a new type of world historical heritage in recent years, taking its implication of " cross-regional, historicity, culture, dynamic and linear " as use for reference, and applying it to research of old residential communities renewal which full with spatial characteristics of "island" and "marginalized", this paper attempts to make use of concept “Cultural Route" to find local historical cultural resources in Yuzhong district, city center of Chongqing, and to form the “City Cultural Route" with properties of local life and urban tourism. The paper uses the way of case study, site survey, data analysis and finally concludes a new method to revive existing old communities in Chongqing.
Study on the Removal of Paper Absorbent to Alkaline Printing and Dyeing Wastewater
Authors: Shao Hong , Zhang Di , Song Ying Chun
Published: August 2011

A new type of adsorbent which prepared with waste paper as raw material was applied in the treatment of dye wastewater, and studied the processing conditions on treatment effect. Batch adsorption study carried out as a function of the dosage, the stirring time, the stirring speed and the pH. The adsorption rate of newspaper adsorbent to basic blue dye simulated wastewater and alkaline yellow wastewater with an initial concentration of 80mg·L-1 can reach 98.56% and 92.23% at 4g·L-1 of the dosage of paper adsorbent, 15min of the stirring time and 150r·min-1of the stirring speed. The maximum adsorption were 233.1g·L-1 and 289.4g·L-1 respectively. The isothermal adsorption experiment was also studied and concluded that the adsorption equilibrium data fitted with the Langmuir isotherm. The characterization experiment showed that the modified paper adsorbent had stronger absorbability.
Theoretical Study of the Operation Performance of a Natural Gas CCHP System under Variable Loads
Authors: Zhu Hong Mei , Sun Heng , Pan Tian Quan
Published: August 2011

A theoretical study of the performance of a CCHP system using natural gas as fuel which consists of gas turbine-steam turbine combined cycle, absorption refrigeration unit and exhaust heat boiler under variable loads was carried out. Two methods to adjust the electric and cooling loads are employed here. One method is to increase the outlet pressure of the steam turbine in the Rankine cycle. Another way is to change the air coefficient of the gas turbine. The calculation results show that the first method can obtain higher energy efficient and is the preferred method. The second way can be employed in case that further more cooling is required.
A LNG Driven CCHP System with a Cold Energy Recovery Device
Authors: Sun Heng , Zhu Hong Mei , Shu Dan
Published: August 2011

The CCHP system based on energy cascade utilization can get very high energy overall utilization efficiency. When LNG is used as the primary energy of a CCHP system, the higher efficiency can be obtained if the cold energy of LNG is recovered. Three CCHP systems integrated with LNG cold recovery facility are presented which are suitable for different situations. The thermodynamic calculation and analysis of the system consisting of combined cycle generating electricity, the LiBr absorption refrigeration units, the cryogenic Rankine cycle generation system and the cooling medium system were carried out. The results showed that the energy utility efficiency of the electricity generating was 34.78% and the total energy utility efficiency was up to 86.49%. This indicates that this technology have the potential to be employed in the industrial applications.
AHP is Applied in the Evaluation of Geological Hazards in Urban Roads
Authors: Zhai Jian Song , Wang Zong Lin , Fu Yi , Zhao Hai Yang
Published: August 2011

City roads are playing vital roles in the economic development. And both highway roadbeds take place geological disasters frequently. This article evaluates geological disasters with the method of AHP. The indexes include lithology, geological structure, slope, high slope, slope structure types, groundwater, slope size, rainfall, river erosion, slope back excavation, earthquake, etc. Through the analysis of the formation mechanism and impact factors in landslide, the model of landslide hazard assessment is established. Then landslide risk factors are partitioned into different levels, and seven part of geological disasters area are calculated. At last determine the risk level of landslide areas comparing with the risk classification table.
Research on Load Carrying Capacity of R.C. Beams Strengthened by CFRP
Authors: Chen Nian He , Yuan Jiao Jiao , Huang Cong Bin , Shen De Jian
Published: August 2011

A relatively deepgoing experimental research and analysis is carried out for the reinforced concrete beams strengthened with externally bonded Carbon fiber reinforced plastic (CFRP). First, a total of eight test beams are derived. The four-point bending test is then used to determine the load-displacement relationships of the beams. In the study, the performance of CFRP sheets is investigated. By comparison of the results of the experimental research on the R.C beam unstrengthened and the R.C beam strengthened by CFRP, it is shown that the influence of the carbon fiber sheets on the flexural carrying capacity of the strengthened beams is significant, CFRP has obvious effect to constrain the crack of the beams. The beam strengthened by CFRP at the different stages of the loading has ‘strain lag’. The plane assumption is valid for the beams strengthened by CFRP in different stages. The ductility of the beam strengthened by CFRP is obviously improved.
The Malaise of Rural Life World in the Context of the New Countryside Construction in Southern Jiangsu, China
Authors: Wang Yong , Li Guang Bin , Jiang Liang
Published: August 2011

Based on Habermas’s theory of the life-world, this paper attempts to examine the recent government’s policies to construct rural markets and countryside living form and to conduct an in-depth analysis of the crisis that is facing the rural life-world within these two dimensions. The paper questions the rationality of the government actions in new countryside construction of Southern Jiangsu. It is contended that excessive government intervention with the systematic lack of democracy and freedom will lead to multiple crises of rural life world and eventually cause the system to colonize the rural life world.
Model Sand Hydraulic Performance Experimental Study in the Yellow River Delta
Authors: Zhu Chao , Zhang Cong Jiao , Ren Yan Fen , Wu Guo Ying
Published: August 2011

The Yellow River delta model selected Pseudochark as model sand, it is new-style model sand with steady physical chemistry performance and moderate unit weight. By applying flume experiments,the resistance characteristic, sand-carrying ability, initial velocity etc. of Pseudochark are analyzed, which provids data reference to design the Yellow River Delta Model.
The Crack Investigation and Analysis of Frame Structure Subjected to Lateral Loading
Authors: Wang Su Guo , Yang Chen Yu
Published: August 2011

The crack development of two cast-in-situ RC frame structures subjected to lateral loading was investigated. Then the develop reasons were analyzed. The investigation indicates that the existence of monolithic slab in reinforced concrete frame structure overstrengthened the actual flexural capability of longitudinal beams. Therefore, the participation of monolithic slabs should be made in consideration in structural design to achieve the strong column weak beam philosophy.
Reliability Comparison of Passive Dissipation Structure based on Random and Monte Carlo Analysis
Authors: He Qing Guang , Du Yong Feng
Published: August 2011

Random response of dissipation structure was obtained by means of pseudo-excitation method, and dynamic reliability was analyzed based on random response analysis. In contract that time-dependent reliability was studied by use of Monte Carlo approach. A numerical solution method with iterative analysis procedure for implicit performance function was applied to carry out the relevant statistical parameters. A 6-storey building as an example was analyzed to compare the two methods about reliability.
Forecast Model for Gas Well Productivity Based on PSO and SVM
Authors: Yang Min , Li Jun , Liu Jing Cheng
Published: August 2011

It is very important to forecast the gas well productivity of gas reservoir accurately. On the basis of analyzing the parameter performance of support vector machine (SVM) for regression estimation, the paper proposes gas well productivity prediction model based on particle swarm optimization (PSO) and SVM. The parameter of SVM was optimized by PSO. This method took advantage of the minimum structure risk of SVM and the quickly globally optimizing ability of PSO. Compared with BP neural network model, the proposed GA-SVM model for gas well productivity in practical engineering has higher accuracy and speed, and the maximum error is 2.8% . Thus, it provided a new approach to predict the gas well productivity.
Thermal Stress Performance Analysis for a New External Wall Insulation System
Authors: Li Jian Guang
Published: August 2011

In this paper, two models are taken as subjects, one being a small frame exterior composite insulation system with the shear key, the other being the system without the shear key. In extreme high temperature conditions in summer, the small frame exterior composite insulation system temperature stress and strain are analyzed with numerical simulation using finite element method. Results show that shear key can effectively reduce the stress concentration, weaken the stress peak by nearly 50% and reduce the deformation by nearly 50% as well, thus effectively reducing the probability of crack cracking, improving the durability and extending service life.
An Analysis of Earth Folk Houses Along Shandong Canal
Authors: Zhao Peng Fei , Tao Bin
Published: August 2011

Earth folk houses refer to a type of traditional dwelling with their main structure built with raw earth through simple treatment without being baked in a kiln. The article discusses two types of folk houses found along Shandong Canal, including thatched earth cottages and shallow-vaulted earth cottages. It studies the layout, architectural features, building methods and materials of these buildings and explains their historical, cultural, and ecological significance.
Research on Integrating Design of High-Rise Ward Building Based on Green Principles
Authors: Wu Gang , Li Sheng Cai , Ge Ling
Published: August 2011

Eco-friendly and efficient resource allocation and comfortable building physical environment would play a key role in the architectural design of green hospital. In this paper, the issues of how to allocate resource efficiently, to utilize solar energy, to cut down the consumption of fossil energy, and to create the appropriate comfortable environment at the least cost of the energy consumption are probed from the respects of layout of master plan, combination of functional space, and indoor or outdoor physical environment.
Design & Construction for a Deeper Foundation Pit
Authors: Li Dong Mei
Published: August 2011

This paper describes the design and construction of the Foundation pit with steel sheet piles which is on a deep and small area, achieving good economic and social benefits.
Investigation of Ultraviolet Ageing on Rheological Characteristics of Bitumen
Authors: Yu Jian Ying , Liang Yong Sheng , Feng Zhen Gang
Published: August 2011

The influence of ultraviolet (UV) ageing on complex modulus, phase angle and low-temperature fatigue factor was studied by dynamic shear rheometer test. The ageing degree of the bitumen was evaluated by the rheological parameters. The results show that UV ageing causes an increase in complex modulus and fatigue factor, as well as a decrease in phase angle, indicating that the bitumen becomes more elastic after UV ageing process and is apt to crack at low temperatures. Different bitumen exhibits diverse changes in the rheological parameters after UV ageing, which is much dependent on the sources of bitumen.
Review of Latest Developments in Microporous Aerogel for Building Applications
Authors: Cui Yan Qi , Riffat Saffa
Published: August 2011

Buildings are large consumers of energy in all countries. In regions with harsh climatic conditions, a substantial share of energy goes to heat and cool buildings. This heating and air-conditioning lost can be reduced through many means, such as the selection of the building thermal insulation materials. The proper use of thermal insulation material in buildings does not only contribute in reducing the annual energy cost but also helps in extending the periods of thermal comfort without reliance on mechanical heating and air-conditioning. Aerogel is one of the novel insulation these years, thermal conductivities of 0.04 W/mK less can be achieved using it. The paper is concerned with a review of Microporous Aerogel for building applications. And it also provides information about their performance.
Research on Economy Escalation and Low-Carbon Industrial Development in Jiangsu Province
Authors: Jiang Guo Gang , Kong Zhen , Dong Guo Xin
Published: August 2011

Under the circumstance of worsening international and domestic economy developing environment, Jiangsu must pay attention to and accelerate the transformation of economy development. Through the economy escalation by low-carbon industrial development in Jiangsu City, the paper emphasized that the government should play a guiding role, focusing on the subsidies and tax policy, coupled with the low-carbon technology innovation, low-carbon economy enterprise operation and management of public utilities, public low-carbon mechanisms such as promotion of universal consciousness, and build systematically low-carbon economy development mechanism system in Jiangsu, combining low-carbon economy development with industrial structure optimization, and realized the transition from high-carbon growth to low carbon growth.
Hydraulic Torque Converter’s Performance Analysis Based on Neural-Fuzzy System
Authors: Tian Guo Fu , Feng Ke Qiang , Sun Shu Hui
Published: August 2011

Aimed at the need of data processing and analysis in the performance experiment of hydraulic torque converter, we put forward a way of experiment data analysis using neural-fuzzy system. It can reduce manual participation, improve the data processing ability, accelerate computing velocity and realize data handling automation. We can judge product’s performance by this method. The use in experiment data indicates that it can express the relation of original data nicely. The identifying accuracy of data is good. It can satisfy the request of experiment analysis and the analytical conclusion is accurate too.
Fuel Characteristics Research and Regression Analysis for Blend Fuel of Biomass and Coal
Authors: Wang Zhi Wei , Lei Ting Zhou , Yue Feng , He Xiao Feng , Zhu Jin Ling
Published: August 2011

Blend fuel of corn stalk and coal was made in a series of blend ratios with corn stalk mass percent ranging from 10 to 90%. Several data were gotten by proximate analysis with considering indexes of volatile matter, fixed carbon, sulfur content, heat value and ash. The regression equations of the data were gotten through regression analysis for the relationship between blend ratios of corn stalk(BRCS) and proximate analysis data(PAD)．The result showed that there was linear relation between PAD of the blend fuel and BRCS, and linear equation slope absolute value of volatile matter, fixed carbon, sulfur content, heat value and ash were 8.49,7.64,5.45,4.85,3.97, respectively. Volatile matter content increased with the increase of BRCS, and other PAD was opposites. Variation rate and variation tendency of the blend fuel PAD was gotten through proximate analysis and fitted equation, and some references may be provided for utilization of blend fuel of biomass and coal.