Abstract:Tianjin Haihe Bengbu Bridge is built in CBD of Tianjin city and crosses the Haihe River;it is dissymmetrical steel bridge of three dimensions Beam-Arch Combination System.The bridge is complex for both mechanical and tectonic consideration.The bracing member of abutment 1st and 6th are designed specially,which connect the main girder of the bridge and the rubber bearing of abutment.These buttress braces are designed uniquely in the world,in order to transfer large-tonnage axial load,including compressive force and tensile force,to bearings.The loading behavior of them are significant effect to the security of the bridge and need to be analyzed specially,so a 1:2.5-scale model is made,destructive experiment of experimental member is done.Experiment member is elastic based on experimental data at tension load;limit axis load is 3002kN when the member is buckling.Except model experiment,a finite element analysis of model is also essential.Through experiment and finite element analysis,the reliability and safety of the bearings are verified.

Abstract:The calculation model for the collaborative analysis of frame-shear wall structure was established by considering partial floor deformation,the flat structure of flexible floor is divided into several regions,each of lateral force-resisting members can be seen as a frame-wall modules,and flexible floor role can be seen as a elastic support unit.The derived solving dual system for analysis of synergies was derived by using Hamiltonian mechanics;the structure of displacement and internal force of the numerical solution were derived by using precise integration method.Example calculation results indicate that the method is high precision.

Abstract:The pushover method was applied to analyze the anti-earthquake performances of the knee bracing steel frame under three kind rare earthquake intensities,The failure mode and plasticity hinge developing processing under the rare earthquake function of the cross truss system were obtained,and the structure has been assessed the anti-earthquake performances under the different earthquakes.Under the earthquake plasticity hinges appear from knee brace to ordinary brace the last is on the beam,it can consume earthquake energy to protect the column being destroyed at the same time.The result indicates the knee bracing steel frame adjust to the requirement of strong column and weak beam.

Abstract:The push-over analysis is a simplified method to evaluating structural anti-earthquake function which is gradually used widely.While the shaped-steel reinforced concrete-reinforced concrete(SRC-RC) structure is often used in the earthquake-stricken areas for its virtues,including high bearing capacity,strong stiffness,excellent ductility and less energy consumption.With mathod of the push-over analysis,this research concisely analyzed the damage to the SRC-RC structure that might occur after the strong earthquake.The results show that the maximum elastic-plastic story-drift-angle of the SRC-RC structure is 1/407,which meets the requirement for elastic-plastic deformation of the weak storey under a rare earthquake.

Abstract:In various factors that influence the concrete structure durability,coupling corrosion between reinforcement and concrete has been become the important destructive factors in existing concrete structures.Based on the previous test results to 14 corroded RC beams under different corrosion level of concrete and steel bar,the performance of the corroded RC beam under the concrete-reinforcement coupling corrosion is studied.According to those results,estimate methods on flexural capacity under different concrete-reinforcement coupling corrosion are proposed.In this study,effective estimate methods are found out through experiment,which can provide technical reference new thought for flexural capacity evaluation and strengthening design in RC beams under the concrete-reinforcement coupling corrosion,and also have some theoretic guide for practice.

Abstract:Based on the topology optimization of truss,the genetic algorithm(GA) was improved more efficient.In the design of size and topological structure of the truss,binary encoding,crossover and mutation for size and topology variables were adopted separately and the initial solution was gained,with the accuracy of the size variable coding properly reduced to speed up the convergence of the GA.In order to prevent trapping in local optimal solution,a portion of initial solution was added to the new parents,and then the size of section was recoded and the final solution was searched in a better precision.Examples show that the method is effective to the topology optimization design of truss structures with discrete variables.

Abstract:In order to enhance the identification precision,the flexure stiffness and support vibration are considered to model the cable,and the model is analyzed to obtain the displacement function and the relationship between cable tension force and frequency.We carry out several studies which have demonstrated that if the cable tension is little,the cable tension force considering the support vibration will be larger than the force omitting the vibration,but along with cable tension increasing the discrepancy becomes less,so the model considering the support vibration can accurately model the cable structure.

Abstract:In this paper,8 pieces of cold-formed thin-walled steel tube beams subjected to low-cycle reversed loading were tested,and nonlinear finite element analysis were also conducted to explore the effects of span to height ratios and width to thickness ratios of cross-section on the hysteretic behavior,ductility,and the ability of energy dissipation.Some important conclusions can be extracted from the experiments and the nonlinear analysis and listed as follows:(1)The cold-formed thin-walled steel tube beams exhibited stable hysteresis behavior up to local buckling and then showed considerable good ductility and the good ability of energy dissipation.The pinch-crinkle phenomena didn't occur in the hysteresis loops of load-displacement.(2) The hysteresis behavior and ductility of cold-formed thin-walled steel tube beams depended on the span to height ratios and width to thickness ratios.(3) The proposed nonlinear FE model could accurately predict the overall seismic behavior and the inelastic performance of the cold-formed thin-walled steel tube beams.The hysteresis loops from nonlinear FE models under low-cycle reversed loading agreed well with those from the low-cyclic reversed loading tests.

Abstract:Taking the clamped slab as the study object,the research simulated the structural damage by changing the elastic modulus of elements and detected the damage based on the vibration modes,the frequency,and the mode curvature difference respectively.The results show that the vibration modes and the frequency changed too little to identify the damaged location in the thin slab with small area damaged,while the curvature mode difference of the damage element changed obviously.Therefore the location of the structure damage can be identified exactly by using the method of the curvature mode difference.

Abstract:Stress-strain relations for soils depend heavily on consolidation stress.The relativity appears as normalization character of clays silty.Clay is wildly distributed over Handan area,and often used as the bearing stratum of buildings.This paper analyses the normalization condition of stress-strain relation for clays of Handan in consolidated undrained triaxial test.The results show that if stress-stain relation of soils is considered as the Kondner hyperbolic function,the normalization character is bad whenσ₃,σ_m and(σ₁-σ₃)_ult serve as parameters,and good when(σ₃)ⁿ and(σ_m)ⁿ are adopted;the best normalized curve is chosen then.

Abstract:Based on practice of campus construction in primary and secondary schools,this paper puts forward some principles on campus planning and designing including layout,modernization and architectural poetry.The purpose is to seek for new ideas for constructing modern campus and improving culture atmosphere.The results can provide some references for architecture design.

Abstract:In this paper,combined with the regional characteristic of south province high temperature including heavy axial load,axial load number of times,big gravity of freight train were represented as research bodies.The dynamic characteristic of the cement concrete pavement in the most disadvantageous load location was simulated by using three dimensional finite element methods.The variation of the cement concrete pavement structural mechanics behavior with the important parameter of board thickness,base thickness,base module,foundation stiffness and joints were obtained.The results provided the theory basis and the reference for the design of the cement concrete pavement and the mechanical response of pavement structure under the heavy transportion.

Abstract:From the relationship between street and street-side interface,the paper has a discussion on the significance of the continuity of street interface both in the formal beauty of the continuity and security requirements,and puts forward the specific indicators and methods to controlling the continuity of the street-side interface such as building height along the street,the rate of building affixed to the street line,aspect ratio of the building and building roof contour.Finally,with the successful case of controlling of patterns on streetside of the interface in the urban design of the 22 and 23-1 blocks of the Shenzhen central district by SOM,the paper illustrates the feasibility of the elements and countermeasures in the controlling on continuity of the street-side interface,and provides reference for specific urban planning management.

Abstract:The geothermometer is usually used to calculate the deep temperatures of geothermal reservoirs in the geothermal system,but if the chemistry component is not balanceable in the geothermal reserviors,the equilibrium temperature of the deep reservior estimated by the geothermometer is not true.Taking thermal groundwater of the eighth coal mine in Pingdingshan for example,both the Na-K-Ca diagram and the lg(Q/K) figure are employed to exam the mineral-fluid equilibrium state qualitatively and quantificationally,which may lay a theoretical foundation for the choice and application of geothermometers.

Abstract:Low temperature floor radiation heating system and the general design methods in programs are introduced.As the theory of the floor radiance heating system is different from the one of convective heat transfer,some proldems exist in cognition leading to the inconsistency of heat dissipation between practice and design of the low temperature floor radiance heating systen.Combined with formula existed in criterion,the ratio and the reduction of radiation heat dissipation of low temperature floor radiance heating system was worked out in different allowed floor surface average temperature tb and different indoor designed temperature tn,further more in shelter condition emphatically.It is reference to amount loss by sheltered floor area of low temperature floor radiation heating system design.

Abstract:A simple quarter-vehicle model with two freedom degrees was founded on the basis of vehicle-road interaction,and the pavement surface roughness(PSR) was considered as excitation causes.The power spectral density(PSD) of the roughness of the road was described.The stochastic vibration theory was used to analyze the stochastic dynamic pressure of vehicle on rough pavement.Example analysis shows that the dynamic load coefficient increases along with the increase of vehicle velocity and PSR.Dynamic load coefficient is the important parameter reflecting the stochastic dynamic pressure.

Abstract:The identification of chaos phenomenon is important for chaos analysis and control.Based on the conceptions and methods of information theory,control theory and data mining techniques,the framework and function module of the system for real-time identification of chaos are introduced.To meet the requirement of the principle and function of this system,feature extraction for time series is necessary.The case studies are given for time series generated by Logistic system.Feature of time series are extracted by wavelet packet coefficients and wavelet packet energy respectively.The reason and necessity of feature extraction are analyzed.The results indicate that the module for feature extraction is a key module in the system for real-time identification of chaos.Wavelet packet energy can be used in this system for feature extraction.

Abstract:Firstly,the semantic Web service based on Petri net is described and modeled in this paper.Secondly,Petri net formalized elements are added to Web service.Thirdly,Petri net model is described with XML in order to put the semantic Web service come into practice.Lastly,this paper give the practice of Web service composition.

Abstract:This paper analyzes the operational principle of KDK4 motor soft-starter,and introdues its application to the belt conveyor in the coal mines,finally summarizes its working characteristics and advantage accordingly.It can be indicated that the KDK4 motor soft starter can avoid the mechanical and electrical shocks to extend the equipment life in the utmost degree.

Abstract:40 samples of soybean(Glycine max(L.) Merr.) in field were took out to observe their root morphology at vegetative and pod stage respectively.Meanwhile,the drought tolerance of these varieties were tested at vegetative stage by cultivated in pots and their root morphological and physiological traits were researched.The results show that soybean root morphology varies in the two stages or in the same stage but in different conditions.There were evident and extensive genetic variations in the root morphological parameters among varieties with different water applying,including total root length,root volume,root dry weight,root reductive activity,root total absorbing area and root active absorbing area.There was also significant difference response in root traits among varieties with strong drought tolerance and weak drought tolerance.Therefore the research provides a new way for soybean breeding improvement by selecting root traits.

Abstract:A new idea was put forward to the chaotic characteristics of deformation of mine shaft by means of phase space reconstruction of chaotic.Problems of space reconstruction of deformation value,correlation dimension determination,Lyapunov exponent calculation and stability were discussed.The result of the simulation experiment shows that the deformation system is a chaotic system,and affected by many factors;the biggest Lyapunov exponent may serve as the determinations standard of shaft deformation.The research can offer some help for the policy-making of the determination of stability in goaf.

Abstract:Researches on the potential of urban land are the base of reasonable and sufficient utilization and protection of soil by city erectors.Taking Tangshan city as example,this paper focuses on the evaluation system,evaluation unit and evaluation model.Based on technologies of RS,GIS and database,the research developed the analysis and evaluation system of soil potential integrating recent earth information management technology.This system provides not only the basis for the land evaluation,but also the method for the inquiry,statistic analysis,printing of spatial and attribute data.

Abstract:In view of the difficult roadway support problem of deep portion soft coal seam in Jinneng group Xingdong Coal Mine,the combining support plan was proposed based on the analysis of support mode,and mechanics mechanism analysis was carried on comprehensive and systematical analysis and the combining support technology was researched in deep high stress soft crag roadway in Xingdong Coal Mine.The rerult shows that the roadway support in Xingdong Coal Mine has obtained good technology effect and economic effect.

Abstract:Based on the analysis of the water sample and integration of karst groundwater data,this paper analyzes the hydrogeochemical and geothermal characteristics of the hot karst water and its genesis in the western Cizhou coalfield.The results show that the deep karst warm-hot water in Ordovician under the coalbearing strata is SO₄Cl-CaNa type water with high TDS and high hardness,and its formation is derived from the deep seepage of groundwater along faults and long time evolution;the geothermal abnormity is water-heated geothermy with more than 60°C temperature of heat storage and 1500m depth of circulation,and the heat source is from the thermal addition of igneous rock mass intruding in Yanshanian over the regional normal geothermy.The research provides some reference in geothermal research,coal exploitation,prevention of thermal damage and mine water damage.

Abstract:Based on investigation and consultation,18 species of plants are initially selected for Wujiazi iron mine ecological recovery.The factors such as adaptability,functional and economical character comprehensively and the features such as drought resistance,pest resistance,cold resistance,heat resistance,barren,soil conservation,soil improvement,greening effect,the cost of cultivation,management and raise cost,economic output are considered.The relative importance of the decision-making program the qualitative judgment will be quantified by using analytic hierarchy process(AHP).Following 8 plants are finally chose as the most suitable species to the conditions of Wujiazi iron mine including Zanthoxylum bungeanum,Ulmus uyematsui,Juglans regia,Medicago sativ,Astragalus adsurgens,Platycladus orientalis,Setaria viridis and Sabina vulgaris.

Abstract:The cross hedging is studied for PET with PTA future,and mathematical models of OLS,VAR,GARCH,VEC are established.The paper analyses the cross hedge rate between PTA future and PX and assesses it using criterion of minimum variance.The result shows that the effect of cross hedge is perfect by selecting the proper model such as the VEC which can avoid the most of fluctuation risk.

Abstract:This paper introduces the method of knowledge management based on co-work.A co-work platform based on Internet/intranet for the software enterprise using the computer and network was proposed and a method of knowledge management based on co-work closely related to the software project development was given out.