bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of Ship-Building Assembly System for Ship’s Blocks Using 3D Measurements System
Authors: Lee Dong Myung , Kim Soo Young , Moon Byung Young
Published: September 2014

Most of Shipyards have adopted block construction method. In spite of efficiency, this method has been reported lots of problems. Overlap or gap between blocks, such problems are mainly caused by deformation of blocks. The ship’s block is built by thin plates which are processed by cutting and welding, etc. Deformation of block comes from process of plates by cutting and welding in the stage of block assembly. In the stage of block erection, overlapping or gap occurs between block’s parts which are caused by deformation of blocks. So, block accuracy management is the key point to production efficiency of shipyards. In this study suggests a 3D measurement based Virtual Assembly System (VAS) to solve those problems. This study specified principle function of VAS and implemented to check validity of principle function. Principle function of VAS is analysis of block’s deformation between design and measurement information and performs block erection process with measurement information in virtual assembly space. According to these principle functions, VAS has been implemented with ACIS for 3D geometric modelling kernel and HOOPS for 3D visualization library. Block deformation analysis and virtual block erection has been performed with two ship block to check validity of VAS.
Side Impact Safety Design of Vehicle Based on Implicit Parametric Technology
Authors: Chen Tao , Peng Yun
Published: September 2014

In the concept design phase of new car development, the parametric simplified side impact model was established by implicit parametric technology. The design parameters of BIW were optimized based on simplified model, such as the shape of section and the thickness of parts. The side impact safety performance and lightweight requirements were set as restraints during optimizing. The case indicated that the intrusion and intrusive velocity of B-pillar were reduced more than 30% and the mass was reduced 5.6% by this method.
Numeric Analysis on inside Flow Field of Roots Compressor
Authors: Cai Yu Qiang , Meng Xin
Published: September 2014

The roots compressor is a kind of rotary compressors, it is applied widely in mechanical engineering, chemical industry, aerospace industry and other fields with its high speed, long life and mechanical efficiency. In the article, a new combination rotor profile curve of the roots compressor was designed by reviewing the relevant literatures, the 2D finite element modal was established and a transient CFD numerical simulation was performed for a roots compressor by means of dynamic mesh technique. The varying tendency of mass flow rate, the velocity vector and static pressure distribution of the roots compressor were obtained and analyzed.
Odor Detecting Experiment and Result Analysis Based on Photoionization Detector
Authors: Zhang Xu , Zhou Wei , Zhang Si Xiang , Yang Xin Ying , Yang Peng Fei , Hou Xiao Wei , Yang Li , Liu Li Bing
Published: September 2014

Odor pollution means a distinctive gas that is offensively unpleasant and harmful for the living conditions, not only disturbing social activities but also being harm for human. For the character of odor pollution, a kind of odor detecting system based on photoionization detector (PID) has been developed. The capillary column has been used as separate device and the PID as detector. From stability experiment of PID sensor, the standard deviation of system is 5.88×10-3, relative standard deviation is 0.14%. Furthermore, the experimental results of the sample calibration and stability illustrated that by using ethyl alcohol, xylene and butane, system lineaity is 99.99%, 99.98%, 99.98% respectively and the limit of detection is 0.8ppm, 1ppm and 0.6ppm respectively. PID has good stability and the experimental system has better reliability and repeatability.
Analysis on the Inhomogeneity of Air Intake and Retrofit Optimization of the Air Intake Pipe in the Engine T12V190
Authors: Li Xiao Jie , Zhao Zhong Yu , Pan Yu Tian
Published: September 2014

Taking the air intake pipe in the engine as the target of the research, the software STAR-CDE is adopted to build a three-dimensional simulation model for the air intake pipe in the engine T12V190 with the aim to solve the problems of air input deficiency, Combustion deterioration and performance reduction of one cylinder caused by the non-uniformity. Moreover, the non-uniformity of the flux of air intake of the air intake pipe is mainly studied and analyzed through a calculation on the CFD of the inner flow field of the three dimension of the air intake pipe in the engine T12V190. In addition, a retrofit design with multiple schemes is made based on the cavity structure of the original mold for the air intake pipe. Finally, through a comparison among the three selected designs, a more feasible retrofit designing scheme and a designing thought on the air intake pipe in the engine with directional significance are got.
Study on the Rheological Properties and Shear Model for Magneto-Rheological Fluids
Authors: Du Cheng Bin , Guo Fei , Yu Guo Jun
Published: September 2014

In this paper, the influence of the soft magnetic particle content on the properties of MRFs is studied. Besides, the relationships between the shear stress of MRFs and the magnetic induction intensity, the soft magnetic particle content, and the shear rate are discussed. The curve equation that expresses the relationship between the shear stress, the magnetic induction intensity, and the soft magnetic particle content is established through the fitting of experimental data. The results show that the shear stress of MRFs increases with increasing magnetic induction intensity and that the shear stress will tend to stabilise when the magnetic induction intensity reaches a sufficient value. The validity of the Bingham model and the H-B model for describing the relationship between the shear stress and shear rate is established, and the phenomenon of shear thinning of MRFs can be better represented by the H-B model than by the Bingham model.
Remote Dynamic Monitoring System in Groundwater Engineering
Authors: Shi Yun , Pang Li Li
Published: September 2014

In recent years, the exploitation and utilization of groundwater resources in the development of society plays a very important role. From the view of groundwater monitoring system, there are still a lot of problems, such as obsolete monitoring equipment, imperfect monitoring system. To solve these problems, by conducting studies of groundwater dynamic data acquisition and transfer of technology, research and development suited to China's national conditions groundwater monitoring series of instruments. Development of multi-level and multi-source remote management software base on network, build a set of groundwater dynamic data acquisition, storage, transmission, management, and remote control of the information service platform. It has been applied in a number of major projects for the construction and operation of the groundwater monitoring network in China to provide reliable monitoring equipment and management service software.
Research of Portable Vehicle Oil Performance Detector
Authors: Yan Jin , Lin Feng , Shao Jian Wen , Yu Hai Xi
Published: September 2014

In order to address the limitations of single parameter evaluation of engine oil performance, a portable vehicle oil performance detector is designed, realizing comprehensive on-line detection of oil rapidly, easily, and accurately. The detector takes oil performance as study object and proposes an on-line measuring method of oil performance through detection of oil viscosity, dielectric constant and temperature. Data and information collected by transmitter are sent to PIC single-chip microcomputer through RS485 communication module. Measured values are displayed on the LCD by SCM receiving the key signals. Test results show that, the detector works stably and is easy to use with small error, and is able to further determine the extant of oil contamination through a comprehensive analysis of the three measuring parameters. To a certain extant, it promotes the rational use of oil.
Research on Accelerated Life Test System for Water Quality Analyzer
Authors: Shen Guang Yue , Miao Jian , Shao Jian Wen
Published: September 2014

This research proposes an Accelerated Life Test System and has realized the reliability test of water quality analyzer. ALT (Accelerated Life Test) system is based on the principle of step stress accelerated life test and takes temperature as the accelerated stress. The system includes lower computer PLC and upper computer software of MCGS. In this research, Upper computer using configuration software to connect with the SIEMENS S7-300 PLC, in order to realize data acquisition and system control. This system improves the reliability test efficiency of the water quality analyzer, reduces the cost of test and has good economic efficiency.
Shear Strength Monitoring System Based on Measurement of Shear Wave Velocity and Moisture Content
Authors: Hu Peng , Li Qing , Xu Yi Wei , Shentu Nan Ying , Peng Quan Yuan
Published: September 2014

Expound the importance of soil shear strength measurement at mudslide hidden point to release the loss caused by the disaster, explain the relationship between shear wave velocity, moisture content and shear strength, design the shear strength monitoring system combining the shear wave velocity measured by Piezoelectric bender elements and moisture content.
Study of a Measurement and Control System of Industrial Site
Authors: Song Dun Bo
Published: September 2014

According to the industrial site of precision measurement and control systems, the demand for real-time monitoring and multi-task, the paper studied and designed an industrial site monitoring and control system based on Labview; overall structure of software and hardware, the system was designed system, the system platform-level and user-level using a two-stage multi-task scheduling strategy to achieve the industrial field parallel scheduling and control system to improve the operating efficiency of monitoring and control systems; practice shows that the system has high accuracy, strong and stable real-time, etc., to meet the monitoring needs of the industrial field, with a good prospect.
The Fault Pattern Identification of Hydraulic Pump Based on the Sensitive Component STSA
Authors: Wang Yu Kui , Li Hong Ru , Ye Peng
Published: September 2014

A novel method which is based on ensemble empirical mode decomposition (EEMD) and symbolic time series analysis (STSA) was proposed in this paper. Firstly, the vibration signal of hydraulic pump was decomposed into a number of stationary intrinsic mode functions (IMFs). Secondly, the sensitive component was extracted. Finally, the relative entropy (RE) was extracted from the sensitive components and they were used as the indicator to distinguish the faults of hydraulic pump. The research results of actual testing vibration signal demonstrated the rationality and effectiveness of the proposed method in this paper.
The Optimal Location of Piezoelectric Sensor/Actuator Based on Adaptive Genetic Algorithm
Authors: Huang Xiu Feng , Hong Ming , Cui Hong Yu
Published: September 2014

This paper considered the optimal placement of collocated piezoelectric actuator-sensor pairs on a thin cantilever plate using a modal-based linear quadratic independent modal space controller. LQR performance was taken as objective for finding the optimal location of sensor–actuator pairs.The discrete optimal sensor and actuator location problem was formulated in the framework of a zero–one optimization problem,which was solved by real-coded adaptive genetic algorithm (AGA). The vibration response of the piezoelectric plate was calculated using the finite element method (FEM).The optimization and vibration control programs were written by FORTRAN language. The results of numrical examples show that the adaptive genetic algorithm based on the minimum of LQR performance for the optimal location of sensors and actuators is feasible and effective.
A Novel In-Line Fiber Mach–Zehnder Interferometer Temperature Sensor Made of Thermally Expanded Core Fiber
Authors: Zhou Ying Wu , Chen Sheng Yu
Published: September 2014

A novel in-line fiber temperature sensor by splicing a piece of single mode fiber between two thermally expanded core fibers at their core-expanded ends is proposed and demonstrated. This structure forms an all fiber Mach–Zehnder interferometer due to the interference between the core mode and the cladding modes of the single mode fiber. The fabricated sensor is applied to measure temperature changes. The temperature sensitivity of the sensor at a length of 6.3cm is about 65.3 pm/°C. The proposed sensor is low cost, easily fabricated, and may be useful for detection of temperature.
Design and Analysis of Constantan Thin Films Sensor for Monitoring Cutting Force
Authors: Cheng Yun Ping , Wu Wen Ge , Du Xiao Jun , Qiao Gui Ling
Published: September 2014

Cutting force is one of important parameters for manufacturing processes. The traditional dynamometer is limited by size, machining environments, and so on. This paper introduces a new constantan thin film sensor which embedded on the holder of external turning tool to measure cutting force. The relationship between force and output voltage are deduced from theory. By using the finite element software, the analyses on induction and linearity capability of thin film sensor are simulated, and the influences of the location and thickness of film on the output voltage are analyzed. The results show that the linearity of input and output is good and the deviation between the calculated value and simulation results is identical. As the result, the constantan thin film sensor unit can be used to measure the cutting forces.
Design of the Intrinsic Safety CO Monitor with Low Power Consumption
Authors: Mao Rui Qing , Ma Xi Liang
Published: September 2014

To monitor the concentration of CO accurately and in real-time in the environment with flammable , explosive and toxic gas, the intrinsic safety CO monitor with low power consumption was designed by using the low power consumption technology and intrinsic safety technology. The feasibility of the intrinsic safety design was verified by the electric spark discharge calculation and heating calculation. Low power experiments verified the low consumption characteristic of the CO monitor. This method can also be extended to the system to monitor other poisonous and harmful gases.
Multi-Channel Simultaneous Data Acquisition System with Variable Sampling Rate
Authors: Mao Rui Qing
Published: September 2014

Data Acquisition System is very important for Environmental Detection Robot in its self-positioning or measuring the spatial distribution of the concentration of poisonous and harmful gases, so the sampling frequency adjustable multi-channel synchronous data acquisition system was designed to satisfy the requirement of Environmental Detection Robot. Signal conditioning circuit,AD7606 interface circuit and the sampling frequency adjustable function were introduced in detail. The performance test results indicate that the data acquisition system can acquire multi-channel Data Simultaneously in real time, furthermore, the sampling rate and input voltage range can be set according to need, its provides the guarantee For environmental detection robot's follow-up data analysis.
A Review of Product Design for Additive Manufacturing
Authors: Jing Shi Kai , Song Guo Hua , Liu Ji Hong , Zhou Jing Tao , Zhang He
Published: September 2014

Additive Manufacturing (AM) is the digital manufacturing technology by which products are fabricated directly from computer models by selectively curing, depositing or consolidating materials in successive layers. The technology has provided an opportunity to rethink the methods of product design to maximize the product performance through the synthesis of material compositions, structure, and sizes. This overview is created to relate the unique capabilities of AM technologies and discuss the methods of product design. Finally, the current problems and difficulties in this field are discussed in this paper, and this paper proposes the development direction of the product design for additive manufacturing in the future.
A New Edge Detection Algorithm Applied in Obstacle Identification of Unmanned Vehicle
Authors: Huang Hai Long , Guo Jie , Zhao Zhong Yi
Published: September 2014

Obstacle identification is one of the critical technologies of unmanned vehicle, edge detection is the basic step of obstacle identification based on video sensor and the magnitude guarantee of identification effect. In order to meet the demand of accuracy, real-time and stability of obstacle identification, a new multiple order morphology edge detection algorithm is proposed. We adopt two-dimensional histogram oblique segmentation to locate edge, then detected edge by improving the existing mathematical morphology edge detection operators and using appropriate structuring elements and percentile. Experimental results showed the edge detected is exquisite, continuous and intact. The algorithm possesses good robustness for different noised images, cuts operation time by nearly half compared with algorithm without edge location, then makes a good foundation for subsequent processing of obstacle identification.
Dynamic Analysis of PK Section Girder of Cable Stayed Bridges
Authors: Nie Li Ying , Li Jiang Fei , Pan Zhe
Published: September 2014

Pasco-Kennewick (PK) section girder is widely used in the concrete cable stayed bridges with double cable planes, because of its excellent mechanical properties. By created the double girder finite element model, this paper analyzed the dynamic response of one concrete cable stayed bridges with PK section and the dynamic response of the diaphragms. According to the results of the analysis, the diaphragms which near the auxiliaries’ pier s and pylons generated large seismic internal force under the seismic load, and it is account for large proportion when compared with the static load. So, single-girder model can not satisfy the requests for the dynamic analysis of the girder. Due to the cross beams generated large positive, negative bending moment when seismic load impact, we must take notice of strengthening reinforcement in diaphragms. Especially the reinforcement for the negative bending moment, so as to meet the requests for the anti-seismic.
A Simplified Concrete Creep and Shrinkage CEB-FIP90 Model in Long-Span Bridge Design
Authors: Zeng Qing Xiang , Han Da Jian
Published: September 2014

The concrete shrinkage strain and creep coefficient calculation method in CEB - FIP MC90 model is briefly introduced. For application convenience in bridge design, a simplified formula for calculation of the concrete shrinkage strain and creep coefficient is derived. Considering the varying range of every influence factor, a correlation analysis for the factor is carried out. And the weights of those factors related to concrete shrinkage and creep coefficient are discussed. Considering the climate characteristics and the bridge structure features in the Pearl River Delta area, the variation ranges of concrete nominal shrinkage strain and nominal creep coefficient are calculated respectively.
Design and Analysis of Parameter Sensitivity of Prestressed Concrete Continuous Beam Bridge Inconstruction Control
Authors: Bao Long Sheng , Song Tao , Yu Ling
Published: September 2014

During the construction control in order to better control the elevation, the need for sensitivity analysis of the design parameters, the sensitivity analysis of design parameter adjustment principle, so as to adjust the measured deflection and deflection calculation error of judgment, and for the cross section should be the main design parameters of stress sensitivity. This method can identify accurately fast parameter error during the bridge construction, and ensure the smooth and long construction Liang Qiao. To provide reference for construction control of this kind of bridge deflection.
Experimental Study on Properties of Side Joint between Superimposed Slabs with Lattice Steel Bars
Authors: Ye Xian Guo , Yang Kai Nan , Chong Xun , Jiang Qing
Published: September 2014

Mechanical properties of joint between superimposed slabs have a remarkable effect on the bending performance of the whole slab. To study the bending performance of superimposed slabs with different forms of joint, six superimposed slabs were designed and produced. Based on the static loading experiment, load was concentrated on two three-equal-division points, bearing capacity, deformation, cracks of specimens were obtained. Whether there were lattice steel bars in the precast slab or not and different reinforcement in the joint were considered to study the bending performance. The test results show that the failure mode of slab without lattice steel bars is brittle while others are ductile. Lattice steel bars can control the development of cracks along the superposed surface, increasing the shear capacity and improving the ductility of specimens. The bearing capacity of the whole superimposed slab depends on the joint cross section. The joint would not generate a difference to the deflection curves in service condition. When reinforcement in the joint is strengthened, failure modes of slabs will be effectively improved.
Fine-Analysis for the Concrete Upper Rotation Table and Pier of a Bridge Using Rotation Construction Method
Authors: Jia Fan Xin , Chen De Wei , Wu Yang Yang
Published: September 2014

This paper focuses mainly on the case of a three-span prestressed concrete continuous girder bridge. A solid element model of the concrete upper rotation table and pier was established adopting the Midas/Civil Software, considering four unfavorable conditions including eccentric load effects. Then a strict inspection was given on the stresses and deformations of the model in each condition to check the safety of the structures during both processes of girder casting and bridge rotation. The results are positive and satisfactory.
An Analysis of 3-D Wheel-Rail Contact Stress under Heavy Axle Load Using Non-Linear Finite Element Method
Authors: Gu Shao Jie , Yang Xin Wen , Lian Song Liang
Published: September 2014

Wheel-rail contact stress is foundation of the relationship between wheel and rail, and also an important basis for investigating further wear, surface damage and other problems of wheel and rail system. A three dimension elastic-plastic wheel/rail contact model is established using non-linear finite element method. The changes of wheel/rail normal contact stress, Mises stress and elastic-plastic deformations are analyzed under different conditions in heavy haul railway. A method is provided for a foundation of the future study of wheel-rail contact wear, fatigue and cracks germination and development in this paper.
Effect of Aging on Rheological Property of Cariphalte Modified Asphalt
Authors: An Yan Qing , Shao Xian Zhi
Published: September 2014

To get more information of changes in modified asphalt rheological performance before and after aging at different temperature, we did a very comprehensive study with DSR test method. In the different temperature ranges, the abilities to resist fatigue cracking and rutting, temperature sensibility of Cariphalte before and after aging have different changing rules respectively.
Experiment on Incipient Motion of Clayey Silt in the Main Channel of Xuwei Harbor, Lianyungang under Wave-Current Action
Authors: Li Yan , Xiao Hui
Published: September 2014

For two sampling sediment take from the-3m and-5m depth water in the main channel of Xuwei port, Lianyungang, the experiment of sediment incipient motion under wave-current interaction is carried out in a wave-current flume. The results show that the wet density of bed sediment is 1.4 t/m3 and 1.5 t/m3 respectively, the critical incipient shear stress at the bottom of the bed is between 0.21 N/m2~ 0.29 N/m2 and 0.35 N/m2 ~ 0.46 N/m2 respectively; the critical incipient shear stress of sediment from-3m depth water is greater than from the-5m depth water for the same wet density of bed sediment. The results can provide parameters and basis to the research of engineering sediment problem.
Experimental Study of Dredged Sediment Sample Analysis and Solidification in Waterway Regulation Engineering
Authors: Tao Gui Lan , Shi Xiao Lin , Jiang Chao Hua , Feng Xing Guo , Shu Liang
Published: September 2014

How to treat dredged sediment is one of the main environmental problems and the recycling technique is the best way to deal with this problem. This paper deals with the feasibility of beach protection project alternative materials-dredged sand, applies cement and addition to solidify it. The components of dredged sediment and the physical properties were analyzed. Specimens with a designed mix ratio of the cement and dredged sediment were made by means of instant formation. The specimens were cured under standard condition and room temperature. The unconfined compressive strength of specimens were measured after curing for 7, 14 and 28 days. Using solidified dredged sediment as construction material has advantages of technology, economy and environment protection.
Numerical Modeling of the Tidal Current Movement of the Macun Port, China
Authors: Li Xin , Xie Ming Xiao
Published: September 2014

The Haikou Macun Port is the harbor located in the Chengmai Bay of the southern Qiongzhou Strait, China. The principle for the constructing harbor and waterway is the layout should be conformed to the current field. The layout planning port area is studied from the view of hydrodynamics with a wave-current coupling hydrodynamic model of the Mike21 software package. The results show that the large area flow field is substantially unchanged after project construction and the effect is restricted to a small region near around the Macun Port.
Carrying Capacity Calculation and Analysis of Precas Concrete Composite Heat-Insulation Wall Slab
Authors: Wang Ying
Published: September 2014

This article takes the composite wall slab that be connected by reinforcing bar trusses as an example, research the method and steps of calculating the carrying capacity of precast concrete composite heat-insulation wall slab.Finally,The equation for calculating the carrying capacity of precast concrete composite heat-insulation wall slab is obtained by theoretical analysis and finite element modeling, this provide a basis for how to use the composite wall safely in engineering.
Influence of Polycarboxylate Superplasticizer on Cement Hydration Products
Authors: Li Zhi Kun , Peng Jia Hui
Published: September 2014

This paper studied the effect of polycarboxylate superplasticizer on cement hydration products through XRD, DTA/TG, ESEM, IR, XPS and adsorption test, and suggested that the new hydration products were not discovered in the adding PC sample; the adding of PC delayed the formation of hydration product of Aft; with the hydration, the PC molecules were wrapped by hydration products. Key word: polycarboxylate superplasticizer; cement; mechanism; hydration; hydration products
Overview of Research Status on the Durability of Corroded Steel Bar
Authors: Zhang Si Feng , Chen Xue Feng , Li Lin , Song Xiu Guang
Published: September 2014

Based on the summary of research methods and research results of durability of corroded steel bar and its structure, the factors that affect durability of corroded steel bar were summarized and the corrosion morphology and regularity of steel bar was analyzed as well as the impact on the mechanical properties and fatigue life of steel bar. The weakening of fatigue life of steel bar because of corrosion was illustrated through the typical corroded steel bar fatigue S-N curve. Finally, the study direction on durability of corroded steel bar under fatigue load was proposed according to the research progress and the insufficiency at present.
Research on Ecological Building Materials of Edong Traditional Houses
Authors: Lu Xue Song , Zhen Xin Sheng
Published: September 2014

Chinese traditional houses as an important carrier of culture and art forms,and it has a unique historical and cultural value in the history of world architecture. In eastern Hubei Chenjiashan mud brick houses used as an example, clay brick production process, material properties and eco-friendly ideas were eleven studies. The results showed that the soil is not only convenient drawn tiles, ease of processing, with thermal insulation capacity, and deal with local waste material is simple, not a burden and a threat to the environment and can be recycled. The study aims to provide a reference for the sustainable development of building materials and scientific basis.
The Design and Application of Ballastless Track Enhanced Concrete Mineral Admixture
Authors: Ma Bao Guo , Chen Fang Jie , Zhang Bing Liu , Lin Chao Liang
Published: September 2014

Calcium formate and superfine powders comprised of fly ash, slag and silica fume have been used as raw marerials in this research. The results showed that when superfines powders were mixed with 1.5% calcium formate in a fixed porpotion, the 1 day and 28 day compressive strength of concrete can increase 133.7% and 115.9%, respectively.
The Influence of Amylopectin on the Hydration Products of Cement
Authors: Yang Hua Shan , Che Yu Jun , Liao Zhen , Lan Tian
Published: September 2014

Glutinous rice porridge is widely used to mortar formulations in ancient China, and it is significant to understand the interaction between amylopectin and cement pastes. X-ray diffraction analysis, field emission scanning electron microscope (FESEM) analysis and atomic force microscopy (AFM) analysis are used to investigate hydration products in the cement pastes modified by amylopectin in this article. The results show that the hydration products in modified cement pastes were same with those in the unmodified cement paste. However, the growth of hydration products, such as calcium hydroxide (CH), calcium silicate hydrate (C-S-H) and entringite (AFt), are strongly influenced by amylopectin in glutinous rice. And the heavily branched structure of amylopectin is the crucial parameter for the specific control of the size and morphology of hydration products.
Mechanism Analysis of Impact Performance for Tubular K-Joint under Lateral Impact Force
Authors: Song Sheng Zhi , Sheng Shu Song , Wei Jian Jun
Published: September 2014

Tubular structure can be damaged severely by collision accident. To study the failure mechanism of tubular joint under lateral impact force, typical tubular K-joint is selected as basic theoretical analysis model and it is simulated by nonlinear finite element software ABAQUS. On the base of numerical analysis, the development law of deformation and stress is clarified, and the failure mode of tubular K-joint is analyzed in the course of impacting.
Technology Economic Analysis of Honeycombed-Core Hollow Floor
Authors: Wu Tao , Wang Mei , Xie Ru Qiang , Wu Xue Hui
Published: September 2014

According to the design of underground garage roof structure for a practical project, this paper introduces basic structure and designing method of the honeycombed core hollow floor , compared with the multi-ribbed floor design . Then it calculates economic and technical indexes of two kinds of floor scheme. The results shows that the garage roof with honeycombed core hollow floor has better technical and economic advantages .What’s more, it behaves with large space as well as span more especially.
Application Self-Regulating Heating Cable Curing of Concrete in Winter
Authors: Guo Jin Bao , Liu Lin , Wang Qiang
Published: September 2014

In order to solve the shortcomings of traditional methods of concrete curing in winter, proposed self-regulating heating cable new concrete curing methods. Several aspects were considered, about the heating cable length and heating time, heating temperature. According to energy conservation, heating and heat dissipation balance, derived formulas of heating cable normal use length and minimum. As conclusions is shown, first, the normal length design can controlled better heating temperature, it use the cable length and heating time, heating temperature two parameters to control the other parameters. Second, it is better heating efficiency, can be the overall warming state quickly. In addition, when the concrete pouring temperature is above 10 °C, it is not need additional heating, and it can choose minimum length design formula.
Experimental Analysis of Prestressing Construction Schemes of Dalian Gym
Authors: Wang Hua Jie , Qian Hong Liang , Fan Feng
Published: September 2014

Da Lian gym is a typical elliptical inclined mega-grid suspend-dome structure. Its complex structure form makes the prestressing construction more difficulty, and it is necessary to make a reasonable choice of construction scheme. In the paper, the summary about traditional prestressing construction schemes is made, and the construction schemes of radial cable tension and strut lifting were compared with construction simulation technology and tensile test. the results indicates that both methods can achieve the prestress construction of the structure, while more difficulties were contained in strut lifting method, therefore construction schemes of radial cable tension was suggested in actual construction. The research can provide theoretical basis for the structure’s prestressed construction plan, and also provide reference for similar projects.
Construction and Installation Technology Evaluation System of Residential Foundation Research Based on AHP
Authors: Zhang Hai Xia , Zhang De Bing , Li Guo Chang , Zheng Hai Tao
Published: September 2014

With the development and application of steel structure residence, the corresponding evaluation system is developing and also remains to be perfect. This paper, integrated theory and similarity evaluation system for information, compared with the current commonly used methods, using the improved AHP, according to the current national standards, the evaluation system on the foundation construction installation technology is established.
Nonlinear Finite Element Analysis of Continuous Steel-Concrete Composite Beams
Authors: Xiao Liang Li , Pan Ming Yang , Han Jian Wei
Published: September 2014

According to the experimental data of steel beam for Honglu steel company continuous combination,a newer finite element model is presented.The model takes into account the effect by linear material,slip between concrete and steel beam and prestress as well.Five samples of steel-concrete composite beam are calculated with the model.and the stress, strain, crack propagation of nonlinear numerical simulation analysis is carried out , then the continuous composite cross in the load deflection curve of beams is obtained. As the calculation and analysis show that, the results of numerical analysis and experimental data are consistent with the analysis model. And the model is reasonable and effective.This study provides the basis for the application of continuous steel-concrete composite beams.
Construction Technology Research of Cast-in-Place Lightweight Gypsum Wall
Authors: Gang Jia Bin , Li Hui Min , Qi Yan Li , Wang Sun Meng
Published: September 2014

The generation of cast-in-place lightweight gypsum wall changes the Construction form of the inside insulation wall ,using the industrial by-product as the main raw material and the whole cast-in-place construction way has a significant meaning for improving the integrality and anti-seismic property of the wall, improving the people's living level,using the industrial waste,protecting the environment and saving the land resources and energy sources.
Winter Construction Technology of Steel Structure in Northeast China
Authors: Hu Jin Ping , Cui Cheng Chun , Huo Jia Zhen
Published: September 2014

The construction environment under negative temperature has a great influence on the quality of steel structure in winter, especially the negative temperature welding construction of steel structure. Based on the building steel structure engineering, this paper discussed the construction technology and technical measures of steel structure under negative temperature in northeast China in winter, such as the installing construction, the welding construction, the paint coating construction and so on.
Experiment of Shield Synchronized Grouting Slurry Using Waste Sand in Sand Layer
Authors: Wang Ting
Published: September 2014

when slurry shield drives in fine silty sand layer, the waste sand consists of a large amount of fine silty sand, it will wastes a lot of money if the waste sand is buried.In laboratory, we use the waste sand as the sand source of shield synchronized grouting, studying on the feasibility of the processing method and slurry properties. The results showed that the sieving waste sand in fine silty sand layer can be used as the sand source of shield synchronized grouting, it is a better way to increase the strength of slurry by increasing the ratio of fly ash for the slurry used the waste sand as sand source.
Introduction to the Era of Information Building Intelligent Systems Design and Engineering Application
Authors: Peng Hai Ying , Zhou Rong , Zhao Jun Hai
Published: September 2014

With the advent of the information age and the rapid development, intelligent building is developing fast in a hitherto unknown speed. Intelligent building is the product of high-tech information technology and modern architecture technology unifies, has a very important role for the rapid development of modern economy and the improvement of living environment. Based on the information age the rapid development as the background, a brief analysis of the design of intelligent building system and its application in architecture engineering.
The Application of BIM in the Restoration of Historical Buildings
Authors: Li Yan , Dong Kai , Li Guang Fan
Published: September 2014

Along with economic development, the consciousness and the ability in our country of historical reconstruction increase gradually. The use of information technology for modeling, design and archive in historical reconstruction is of great significance.The emergence of BIM (building information model) technology can effectively promote the ancient architecture of information integration and the collaboration between the parties. It can also avoid the understanding error of design. Using BIM to build ancient building component library can also reduce the burden of the future similar engineering design modeling work. Articles explore the current problems to overcome in ancient building repair, introduce the BIM technology, and then expounds the importance and advantages of BIM technology in historical reconstruction. At last, this paper proposes the whole idea of using BIM technology to repair and build the historical building.
Application Exploration of BIM Technology in the Design of Civil Air Defense Projects
Authors: Li Wei , Huang Li Min , Wu Tao
Published: September 2014

With the development of computer technology, the construction industry is moving into the information age. The development of BIM(Building Information Modeling) provides technical support for construction design. Currently, BIM technology in the design application has been matured, this paper explores the BIM technology in air defense projects construction design.
Computer Analysis of Orthotropic Nonlinear-Elastic Construction in Plane Stress State
Authors: Blokhina Nina S. , Galkin Andrey G.
Published: September 2014

The paper describes usage of moder computing complex ANSYS in calculating constructions made of physically nonlinear materials.
Buckling Strength of Pressurized Cylindrical Shells under Axial Compression
Authors: Zheng Yu Chao , Yan Yang , Wang Pei Jun
Published: September 2014

A systematic parametric study was carried out to investigate the elastic and elastic-plastic buckling behaviors of imperfect steel shell subject to axial compression and internal pressure. Studied parameters include the magnitude of internal pressure, steel strength, and ratio of cylinder radius to shell thickness. Design equations were proposed for calculating the elastic and elastic-plastic buckling strength of imperfect steel shells under combination of axial compression and internal pressure. The buckling strength predicated by proposed equations agrees well with that from the numerical simulation.
Intensity-Reduced Design for Structure with Fluid Viscous Dampers
Authors: Zhao Da Hai , Tong Li Li , Chen Yong Qi , Zhang Zhen Qiang
Published: September 2014

The intensity-reduced method based on fluid viscous dampers is proposed in this study. The analysis model of fluid viscous dampers is firstly introduced. The intensity-reduced design procedure is thoroughly discussed. Taking an 11-story reinforced concrete frame shear-wall structure as example, the intensity-reduced method is implemented in this study. The dynamic responses of the structure with and without fluid viscous dampers, including the maximum inter-story drift angle, base shear force, are discussed. The results show that the proposed intensity-reduced method for structure with fluid viscous dampers is feasible, and the responses of structure satisfy the code for seismic design of buildings. The earthquake input energy is mainly dissipated by fluid viscous dampers, which guarantees the safety of the main structure.
Optimization Design and Analysis of Guyed Anchor for Transmission Line Tower
Authors: Zhang Xin Chun , Wu Ding
Published: September 2014

Guyed anchor is an important component of transmission line tower, and its stability directly affects the safety of the whole line. Under the condition of meeting the uplift tensile forces, the optimization design and analysis of the guyed anchor is studied through the optimization program using the method of network searching. The influence of the soil properties, the guyed anchor structure, the uplift tensile forces and directions on the optimized embedded depth of the guyed anchor is discussed in detail. These results will provide some theoretical evidences and technical supports for the guyed anchor manufacture and the selection of the embedded depth.
Seismic Performance Research of Connections of Prefabricated Wall and Beam In-Plane
Authors: Meng Xian Hong , Cheng Pei Yan
Published: September 2014

The paper introduces a method for connecting fabricated shear wall with beam in a plane by sleeve, and uses the finite element software to analyze and compare the seismic performance of precast wall beams node and cast wall beam node. It concluded:Seismic performance of prefabricated wall beam node and cast wall beam node are basically the same , while the prefabricated wall beam node has higher strength, which indicates that the connection of precast specimen is reliable. However, before putting it into practical, application, further study on it is still necessary.
Study on Relationship between Gravity Field and Earthquake in Eastern Margin of Tibetan Plateau
Authors: Guo Shu Song , Zhu Yi Qing , Zhao Yun Feng
Published: September 2014

The gravity data from 1998 to 2012 in eastern margin of Tibetan Plateau was processed to analysis the relation between gravity field and earthquake activities. The results show that long period gravity change appears to be concentrated in regions with active faults, and short term variation may be affected by change of the active tectonic in eastern margin of Tibet plateau that due to energy release and adjustment after Wenchuan Ms 7.9 and Yushu Ms 7.1 earthquake. Specifically, gravity field alternated with positive and negative from 2010 to 2011 reflects viscoelastic properties of coseismic deformation after Wuchuan earthquake; a restorational change from negative to positive during 2011-2012 provides support crust tectonics exists strain accumulate and release stage in regions.
The Development on the Synthetic Seismic Waves and its Relative Issues
Authors: Liu Ping , Ma Hua , Wang Rong , Li Zhen Bao
Published: September 2014

The influential factors on synthetic seismic waves and seismic codes in China are described in detail in this paper. And the evolution of synthetic seismic waves is overviewed. The methods of synthetic ground motion in the earthquake engineering field are summarized in order to provide references for the synthetic ground motion. Based on the study situation over the world, the issues and trend are presented. Some suggestions are provided for improving the codes and standards.
Three Dimensional Seismic Response Analysis of Complicated Metro Station with Shallow Depth
Authors: Lin Hong , Pan Xin
Published: September 2014

Focusing on a complicated metro station with shallow depth, its three-dimensional calculation model was established, which includes not only the main station structure, but also includes the subsidiary structure such as the entrances and detailed structures such as the holes in the floor. The Davidenkov model was employed to simulate the nonlinear characteristics of the soil. The three-dimensional nonlinear seismic responses were analyzed. it can be shown from the calculation that: (1) the metro station structure can satisfy the demand under given seismic motion; (2) it is more important for structural concept design and structural measures design than the strength and deformation design for complicated underground structures.
Seismic Consolidation of ’60s Pilotis R.C. Building for Social Housings with SCC-Steel Shear Walls
Authors: Andreini Marco , de Falco Anna , Giresini Linda , Sassu Mauro
Published: September 2014

The reinforcement of a r.c. building for social housing has been achieved by using Steel-Concrete Composite (SCC) walls at the ground floor, preceded by temporary brick pillars for structural deficiency to vertical loads, due to the poor load capacity of the r.c. columns. The SCC walls have been realized first by placing steel columns on both sides of the existing pillars and, after removal of the temporary brick piers, by merging the steel columns in the cast of the new walls. The top of the walls has been connected to the upper floor in order to ensure the diffusion of the seismic forces. Foundations have been reinforced to support the seismic base shear.
Seismic Performance Study on Side-Strengthened Concrete Beam Using Finite Element Analysis Method
Authors: Ma Hua , Fu Jing , Li Zhen Bao , Zhang Ting Ting
Published: September 2014

Side-strengthened reinforced concrete or precast prestressed concrete beam for inadequate seismic performance is proposed in this paper. The factors are simulated by ABAQUS software for the impact of seismic performance, which are difference of material strength grade, initial load and the order of prestressing and pretightening. The strengthening technology can improve the seismic performance of side-strengthened beam. The meterials with different strength grades which used for beams give full play to their role. The initial load has little effect on the seismic performance. The way of prestressing after pretightening plays a favorable effect for the seismic performance. The simulation results can accurately reflect the impact of these factors on the side-strengthened beam.
Vertical Vibration Control of Series Isolation System under Near-Fault Earthquake
Authors: Rong Q. , Sheng Yan , Liu Shi Xin
Published: September 2014

Series isolation system consists of rubber isolation bearings and composite disk springs, determination method of vertical stiffness and vertical damping of isolation layer is given. Entering the near-fault vertical seismic waves, the affect of isolation layer parameters and earthquake intensity on the isolation effect is studied. Studies have shown that the vertical isolation effect increases with the increase of vertical damping ratio. When the damping ratio reaches a certain value, the isolated effect leveles off. When calculating model is adopted as the hierarchical model, vertical isolation effect has nothing to do with the increases of earthquake intensity.