Abstract:This article uses the ANSYS finite element analysis.The frame structures under earthquake action in accordance with the seismic spectral response are analyzed.With a 10 layer of steel frame structure as an example the modal solving spectral response analysis,modal expansion,modal mergers and schedule analysis of the simulation.The results show that the modal analysis to obtain the natural frequencies and mode shapes of the steel frame.The vibration period of the structure is away from main vibration cycle at the design stage and earthquake spectral response curve and response modal spectral response analysis.Consider the combination of the two can found that the vibration and resonance frequency.All above can avoid the steel frame structure during an earthquake due to damage as a result of the resonance.

Abstract:Combined with the engineering practice of typical rock and soil in Anyang area,mechanical parameters and bearing capacity of the regional silty clay were studied by basing on mathematical statistic theory of rock and soil engineering to study the physical.The research show that: within the study area of shallow silty clay,the variation of the physical parameters is small,the correlation of the physical parameters is conspicuous,the variation of the mechanical parameters is large,and the correlation of the mechanical parameters is not conspicuous.There is a linear relationship between the standard penetration test values,static cone penetration test values,and soil test parameters values with the bearing capacity of the shallow silty clay.The regional empirical formulas of bearing capacity and the actual bearing capacity have higher uniformity.The research results can provide necessary references for the reliable design of regional foundation and determination of bearing capacity.

Abstract:For the fluid-solid interaction problem between an elastic thin cylindrical shell and a transversal cross-flow,United Lagrangian-Eulerian method is applied to build the theoretical equations for the medium deflection problem,and the deformation and surface pressure coefficient of the shell are focused on.The results suggest that,under the action of a transversal cross-flow,the round section of the shell is changed into approximate ellipse; besides,the deformation of the shell influences the surface pressure coefficient of the shell.By examples,the effects of parameters concerned on deformation and surface pressure coefficient of the shell are discussed.Finally,numerical simulation for the problem proceeds using ANSYS,and the theoretical solution confidence are consequently verified.

Abstract:Groundwater seepage poses a threat to the foundation pit safety.Based on the example of deep foundation pit engineering,the three-dimensional seepage model is established.According to the seepage numerical simulation of a foundation pit at excavation stage in Handan city,the pore water pressure distribution rule in soil of foundation pit in time and space at excavation stages were analyzed.The result showed that the groundwater flow into the internal foundation pit from the external in the process of excavation,and active pressure and passive pressure zone were formed.The conclusion provides theoretical guidance for the design and support of deep foundation pit.

Abstract:Based on the melting ice road,the hydronic melting technology of ice melting method in the application of steel box girder bridge was analyzed.And according to the characteristics of the modern steel box girder bridge with thin shop,the new method of heat pipe laying is put forward.Traditional road de-icing design on buried pipe laying between road and bridge pavement layer were replaced by laying at the bottom of the roof,and the two kind of way of laying temperature field of two scheme were analyzed.And based on the theory of steel brittleness at low temperature and fatigue characteristics of steel box girder bridge analysis,it was concluded that laid means at steel plate could keep operating temperature of steel box in winter and prevent it from brittle failure.The improved scheme could not only meet with demand of melting ice,not only ensure the safety working state of the steel box girder bridge.

Abstract:Effects of inflow turbulence on the flow around a circular cylinder have been studied using Large eddy simulation( LES) at Reynolds number of 1.4×105.Results show that increased turbulence makes the free shear inter-layer interactions more intense,led to the flow's three-dimensional characteristics more intense.Moreover,turbulence reduces the energy dissipation,strengthens mutual transmission of wake turbulence energy,and thus prolongs the length of recirculation region.With increasing length of the recirculation,mean base pressure coefficients increased,resulting in the mean drag coefficient decreases.As the wake turbulence is enhanced the wake region will form enhanced multi-scale turbulent,which leads to appearing multiple frequencies in the power spectrum density of the wake flow.

Abstract:Based on least square support vector machine,the constitutive model was established and the basic principle and the specific process of ABAQUS in solving the non-linear problems were analyzed by combining with finite element theory.An example of tunnel excavation was analyzed by using LSSVM constitutive model through the UMAT of ABAQUS.The results show that LSSVM-based constitutive model is feasible and has some advantages in element analysis.

Abstract:This paper uses the numerical analysis method to compare with the period of isolation and non-isolation particle system model,and writes Matlab program of approximate solution to prove.It points out that the isolation structure can extend basic period and reduce the seismic response of the buildings.The approximate solution has high precision,not only does it can meet the precision range in value,but also the calculation is simple and convenient.We can use the approximate solution to estimate the period of the structure.

Abstract:In order to research the seismic behavior of specially shaped columns frame structure of L-shape,this paper establishes specially shaped and same stiffness rectangular column frame structure model based on an actual project.This paper used PKPM software to calculate the models of elastic and elastic-plastic behavior and to get the elastic displacement,tensional coefficient and the collapse of the performance of the structures.The results showed that specially shaped columns frame structure of L-shape had a good seismic behavior under 7 degrees(0.15g) ground,also were better than the rectangular column frame structure seismic behavior.

Abstract:With one strengthening and rebuilding project in Tianjin city as background,external prestressing test was conducted on 12 beams and frame beams with 6 Pin,the stiffness and crack resistance of beam body after strengthening were analyzed.At the same time normal section flexural bearing capacity calculation formula and ultimate stress of tendon incremental calculation formula suitable in this project were confirmed.The results showed that reinforced concrete beams with external prestressing could reduce significantly beam deflection and crack width,and improve significantly ultimate bearing capacity of beam bending with limit state capacity.And fitness beam ductile failure was still the failure mode of beam after strengthening design with proper prestressing tendon.

Abstract:Based on the monitoring data of a deep foundation pit construction in Tianjin Binhai New Area,this paper analyses the horizontal and vertical displacement of the underground diaphragm wall in the process of super-sized top-down method foundation pit excavation.According the analysis results,the horizontal deformation of the diaphragm wall in top-down method foundation pit,whose distribution is approximately shaped like a bow,changes over the depth of excavation.The maximum horizontal displacement varied significantly between top-down method foundation pit and down-top method foundation pit,occurring at about one-third of the pit depth from the foundation pit excavation surface and in the vicinity of excavation surface,respectively.The wall uplift values,on vertical orientation,increases continuously as the depth of foundation pit becomes increasingly deeper.However,it legs behind each stage of excavation to some extent and tends to be steady after pouring the bottom plate.In addition,the analysis results show that the top-down method has the features of small deformation and strong integrity in contrast with down-top method.

Abstract:In the premise of the natural foundation bearing meet the requirements,the calculation and measured results show that,composite foundation with settlement reducing piles can reduce the foundation settlement effectively in not soft soil area,and meet the requirements of design.Compared with the pile foundation,the cost reduced by 50%,and the economic benefit is obvious.

Abstract:The basic properties of recycled aggregates such as partical size,bulk density,water absorption,cylinder compressive strength were studied roundly and recycled aggregates were made from construction waste of brick structure.By experimenting,related to the physico-mechanical properties of recycled concrete made from construction waste such as dry apparent density,compressive strength,impermeability,frost resistance were tested; The compressive strength of recycled concrete whose recycled coarse aggregates were made from concrete waste residue was measured and made a comparison with that of ordinary concrete; Through such as volume to replace sand in mortar the compressive strength of recycled mortar whose fine aggregates were made from construction waste was studied and made a comparison with that of ordinary mortar.The experimental results showed that recycled concrete made from construction waste has a good basic mechanics performance; The compressive strength of recycled concrete whose recycled coarse aggregates were made from concrete waste residue was up to C50; The compressive strength of recycled mortar didn't come off.The research results can be used for reference in the engineering application and scientific research.,and for the further study of recycled concrete and mortar have provided the certain theory basis.

Abstract:To explore construction technology of the coal gangue mixture,the new type materials were used as pavement base packing.Based on Xingtai mine highway engineering,coal gangue mixture on the basis of their own characteristics were analyzed,the method of "J3Z4N2"was established and pave test sections were applied to the whole road.Through detection of the guideposts on the spot,the paper analyzed the key construction technology and the matters being attention of coal gangue mixture pavement base.The test results prove all the indexes of "J3Z4N2 method"paving the road can meet with the standards.

Abstract:Taking a π-Shape girder as engineering background,the test process analysis is carried out through calculation,field inspection and load tests and the working performance and carrying capacity of the π-Shape girder are assessed.The test results show that the experimental π-Shape girder's carrying capacity complies with the design requirement,which can be the basis for later maintenance and can be referred to by the similar engineering.

Abstract:In this paper,characteristics of data centers and energy consumption status of their air conditioning systems are focused.Drawbacks of the allocation and operation mode of the air conditioning systems nowadays are pointed out.Local availability of natural cold source from fresh air and the energy saving potentials by directly introducing fresh air for indoor cooling are discussed.Importance and necessity of the directly introducing fresh air system used in data center air conditioning are expounded.A comparative schematic analysis on a model building of data center by design norm and simulation work has been done in this paper.Reasonableness and great energy saving potentials of the new style air conditioning system with directly introducing fresh air for indoor cooling has been well manifested by our research work.

Abstract:The fixed point theory of the"split-label-split"idea is introduced into the genetic algorithms to solve genetic efficiency,locking the optimal solution looking for completely labeled simplexes,finding their internal completely labeled simplexes in the resubdivision of simplexes in the previous step make the optimal solution regions further reduced.Genetic Algorithms randomly select points in the completely labeled simplexes as the initial group in the relative size of the fitness,which greatly improved the efficiency of genetic algorithm.Genetic variation occurred in completely labeled simplexes or near them,which makes the precision of the optimal solution greatly improved.

Abstract:The decision-making of maintenance strategy for mechanical equipment is proposed by using Analytic Hierarchy Process,and then the structure model of Analytic Hierarchy Process is set up for mechanical equipment maintenance decision-making.The main maintenance strategy about mechanical equipment are Break-down Maintenance,Time Based Maintenance and Condition Based Maintenance.According to the structure model of Analytic Hierarchy Process,the weight of the judgment matrix and consistency check is calculated byusing Matlab.Finally,the maintenance strategy of mechanical equipment was established on the basis of total weight.The results prove that the method of Analytic Hierarchy Process can effectively resolve the decision-making of maintenance strategy for mechanical equipment.

Abstract:Sintered Nd-Fe-B and Sm-Co composite magnets were prepared by adding calcium fluoride and their properties were investigated.Experimental results show that the electrical resistance of the sintered Nd-Fe-B magnets with CaF₂ increased,but their magnetic properties decrease to some extent.The magnetic properties of the sintered Sm-Co magnet with CaF₂ decreased seriously due to the oxidation during the preparation process.The scanning electron microscopy results show that there did not form 1:5 phase and 2: 17R phase in microstructure of the sintered Sm-Co / CaF₂ composite magnet.The CaF₂ was distributed in the grain boundary attached to the Nd-rich phase and has a little effect on the microstructure of sintered Nd-Fe-B/CaF₂ composite magnet.It is a way to increase the electrical resistance for the sintered Nd-Fe-B magnet by adding CaF₂.

Abstract:Aiming at requirements for the design of the sedan driver door,the static tests of window frame stiffness,sill line stiffness concave stiffness,outer plate and hinge were carried out by utilizing the static stiffness test system.The test results show that stiffness of the sash have sufficient capacity to resist body impact deformation; windowsill line have smaller deformation by outsiders load force,which meet the design requirements; the driver outside board has good elastic deformation under load and will not dent; The door hinge has sufficient rigidity intact with the vertical load.The experiment provides the experiment basis for latter experimental analysis of the research and department of door of CAE analysis and optimization.

Abstract:The activity of limestone collected from Qingshuihe area in Inner Mongolia was determined and their influencing factors were studied.The results showed that the activity of lime was determined by degree of decomposition influenced by preheating time,preheating temperature and calcining temperature.The optimum technological parameters of determination of lime activity are as follow: the optimum preheating time was 45 min,the optimum preheating temperature was about 800℃,and the optimum calcining temperature was 1100℃.Besides,the lime activity of limestone from Fengshan Formation was better than Majiagou Formation's.Its reason was closely related with high special surface of limestone with loose microcrystalline structure in old strata,which has high reaction area.

Abstract:In order to manage effectively integrated business of bank and provide competition ability of banks,the component technology of GIS and popular programming language were used in integrated management system of bank basing on the bank outlets and related resources.The management and query of the bank closely related to spatial data and attribute data,as well as location of the bank site,the mobilization of bank staffs,risk assessment of the business,emergency treatment,business accounting,and management of customer were realized through this system.This system could provide reliable information for the GIS foundation for the bank aided management function for each department,and leadership of the comprehensive decision-making.

Abstract:The shear wave velocity dates of 66 boreholes in 34 sites have been collected in Handan city,and all the shear wave velocities have been statistical sorted.Then three types of relationships and the corresponding parameters of each kind of soil were obtained.By contrast,the result show that polynomial fitting method is better than both the linear fitting method and exponential fitting method between shear wave velocities and soil depths for sandy soil,silty soil and silty clay in Handan city; but exponential fitting method is better than the two other fitting method for clay and gravel.It has important directive significance to get and apply shear wave velocity in geotechnical earthquake engineering in Handan.

Abstract:The quarry is located in the northern mountain area of Zhangjiakou City.Being considered the geographic position and climate and present situation of the quarry and so on,the species of native plants were investigated by drawing lessons from the success example in the local; twenty plants which were suitable for ecological restoration of the quarry were estimated.According to the appearance of chosen plants,this paper divided them into tree and shrub and grass; 9 kinds plants including broussonetia papyrifera,platycladus orientalis,witch hazel,aspen; shrub: caragana korshinskii,seabuckthorn,lespedeza; trees: astragalus adsurgens pall,green bristlegrass were used finally in the AHP.

Abstract:The No.3 and No.15 seams of CBM census area were studied from Gaojiazhuang mine in Zuoquan area.We discuss the growth characteristic of coal seams and the variation of the rank,further analyzes the gas-bearing and reservoir characteristics.And the results show that geological conditions of coal-bearing strata are simple,and minable coal seams are featured by big thickness and relatively stable distribution.Besides,the No.3 and No.15 seams belong to lean coal-anthracite coal,which is characterized by high metamorphic degree,coal metamorphic degree of coal gradually increased with the decrease of coal layer from top to bottom,gas content is large and adsorption capacity is high.The main reservoir parameter value of coal is higher,such as gas content,permeability,etc.Gas saturation of seams is close to saturation.

Abstract:A deep foundation pit project of Beijing is adjacent to the operating metro line 10,the distance of a subway tunnel lining segment recently distance is 5.0 m,in order to ensure the safety of subway operation,orbit requirements caused by foundation pit excavation displacement is less than 3mm.To solve these problems and according to the planned excavation engineering itself characteristics and the surrounding environment and hydrogeology condition,deep foundation pit supporting choose the upper for composite soil nail wall and lower as the underground continuous wall.This paper use li-zheng deep foundation pit software to calculate internal force and displacement of underground continuous wall,surface settlement,and carries on the overall stability,resistance to overturning and piping resistance calculation.Calculation results conform to the requirements of the specification.The field monitoring results show that the slope displacement is small,the rail displacement control within3 mm,the total scheme is reasonable in the economy and feasible in the technology.

Abstract:Based on the X low rent housing of A Construction Company as an example,the cost budget and control,as well as the problems of cost budget and control were analyzed by using WBS to decompose the work structure of X low rent housing.The cost management plan of X low rent housing project which can improve the cost budget and control as well as the implementation suggestions of project cost management were put forward.The proposed project cost management can be used as reference for construction enterprises cost control.