Abstract:The main factor that affects designing of compound adding story and seismic decrease and characteristics of compound shock absorption layer are discussed.This paper uses time history analysis to analyze one building structure of compound adding story and seismic decrease in using finite element software.The results indicate that this shock absorption system can enlarge the bandwidth of shock absorbing frequency and the arrangement of support is flexible,and the damping effect is relatively remarkable.

Abstract:Combined with the research and projects status at home and abroad,based on the Exquisite museum project,the newly-developed Domestic TJ-Ⅰ Buckling-Restrained Braces(TJI BRB),adopted domestic low yield point steel(LYP160MPa),Q195,specially made low yield point steel(LYP225MPa) as the core material,were presented in this paper.By a series of experimental research and theoretical analysis,we refined the existing conformations constantly,and ascertained the reasonable design procedure,which facilitated the application of the TJI BRB with greater yielding force that will be implemented in exquisite museum.Ten specimens,whose yielding forces are 400kN,900kN,1200kN,1300kN,1600kN,1800kN separately,are selected from the low cyclic loadings tests carried out in the building structure laboratory in Tongji university.By the summary of the test phenomenon and theoretical analysis,we can observe the steady improvement of the property of the specimens clearly.The TJI BRB,as the eventual experiment results indicated,illustrated steady hysteretic properties and outstanding fatigue characters,which are competitive to the parallel oversea products and is deemed as an effective damping device.By the adoption of the domestic low yield point steel,the research result can promote the application of the low yield point steel in aseismic engineering.

Abstract:In order to investigate the hysteretic characteristics of beam-to-column composite connections in middle-high strength steel frame,four full-scale composite specimens are subjected to destructive test under the low-cyclic reciprocating load.Then the skeleton and the envelope of hysteretic curve are obtained,and the impact of reinforcement ratio and loading mode on the bearing capacity and ductility of the connection are analyzed.Based on the test results and analysis,the three linear restoring force model of the composite connection in consideration of bearing capacity and stiffness degradation is gained.From the analysis results,it can be concluded that the reinforcement ratio mainly affects the connection ductility;symmetric loading can provide higher initial stiffness and ultimate strength in sagging moment;the restoring force model can be used in elasto-plastic seismic time-history analysis.

Abstract:In hogging moment regions,the cracking resistance of the beams can be effectively increased on adding prestressing to the composite beams with external tendons,The rotation capacity of a composite beam prestressed with external tendon in hogging moment regions is governed by local buckling.With tools of abaqus,inelastic finite element buckling analysis of composite beams in negative bending was performed,and the FE results are found agree well with the test results.By varying cross-section parameters,27 groups of composite beams under negative bending with initial geometric imperfection are studied by means of the FE method.The slenderness of the studied beam is defined and the formula for calculating the rotation capacity is presented.The formulae are simple in form,in good agreement with the FE result and expected to be useful for designing the composite beams of class Ⅰ and Ⅱ.

Abstract:Cracking,instability and even engineering accidents of a steel structure may be produced during its design,construction,member damage,fire disaster and earthquake.This paper provides a review of stability theory and experiment research on steel compression bars strengthened.A summary of existing work and development on the stability reinforcement of steel compression bars at home and abroad are first introduced.Then theory and experiment research on steel compression bars strengthened with FRP,bonded steel plates and sleeve pipe are described in detail.Finally,the study of strengthening steel compression bars in the near future is prospected.

Abstract:The free vibration characteristic of steel-concrete composite ribbed shell is taken into account the influence of many kinds of factors such as the rise-span ratio,the ratio of length span and short span,the size of composite rib,the condition of supports and so on,by using the finite element method.The traits of modes are also analyzed,and the weaker stiffness parts of the structure are found which provide reference for the aseismic analysis of the structure.

Abstract:In order to study on the bonding behaviour of TRC for strengthening,the shear experiment research on TRC strengthening layer and the old concrete are performed in this paper.The effects of different interfacial techniques,i.e., artificial chiseling,and reinforced bar planting,on the shear properties are investigated,and the influence law of different roughness and ratio of planting reinforced bar on the interface shear strength are studied.The experimental results show that the bonding behaviour between TRC sheet and old concrete are improved prominently by the above two different interfacial techniques.The shear strength of specimens increases greatly when the technique of artificial chiseling is used,and the range of 2.0-4.0mm is recommended as the best average sand-pouring depth.Furthermore,reinforced bar planting can also improve the shear strength and ductility of the specimens.

Abstract:The structure damping can be increased and vibration of structure can be suppressed by setting up viscoelastic damper in the frame structure so as to shock absorption.Based on the viscoelastic damper working principle,earthquake response of reinforced concrete frame structure with viscoelastic damper,which was installed in different mode,was analyzed in this paper by use of ETABS finite element software.As a result,we obtained the damping effect of frame structure with viscoelastic damper and established the reasonable arrangement mode.

Abstract:The nonlinear second order differential equations are written about the second-order elastic analysis method theory,and the factors on seismic response of the steel frame are analyzed with the different dimensions of earthquake waves and damping.The result by MIDAS software shows that the influence of dimensions of earthquake wave including unidirectional earthquake wave and bidirectional earthquake waves and damping ratio could be affected greatly when analyzing the elastic time history for the frequent earthquake,and when analyzing the elastic-plastic time history for the unusual earthquake.Detailed suggestions for choose these influencing factors are provided.

Abstract:Nonlinear finite element analysis under monotonic load of short-leg shear wall,with or without concealed column,was carried out by ANSYS software,and the analysis results were compared between bearing capacity,ductility and failure characteristics.The influence of ratio of axial compression and concrete grade on mechanics characteristic parameter and internal force distribution of short-leg wall with concealed column were summarized,which could provide valuable theoretical and experimental references for section design.Seismic performance of the wall could be enhanced effectively by the increase of axial compression ratio and level of concrete wall.However,exorbitant axial compression ratio and level of concrete wall will significantly decrease the ductility.

Abstract:Based on filed measured date and calculated result about the internal force of the anchor piles retaining structure in Handan,the reinforcement stresses and moments of the piles along with the excavation of the deep pit are studied in this paper.Internal force of the pile body increase with the depth of foundation ditch during the excavation.The reinforcement stresses is heavily associated with the exposure time,the pile body displacement and applying of the pre-stress anchorage.The elastic method is more scientific than classic method on the base of analysis between actual result and theoretical result of the pile's stress so as to provide structure of pile and anchorage with foundation.

Abstract:The roof of the gym is a typical pre-stressed steel truss.It mainly introduced the structure layout.With initial pre-stress and static analysis,the effective method to use the pre-stress was given.Considering initial imperfection,the geometry nonlinear calculation and elastic-plastic ultimate load capacity analysis are taken,and then the damage mechanism was got.The results show that the structure has enough safety emergence capacity.

Abstract:The Web technology was annlyzed in order to explore more efficient and convenient way of intelligent building system integration.The paper took it into intelligent building system integration.The design and implementation of intelligent building system integration based on Web were introduced by taking the project as an example.

Abstract:Connection zone between freeway and surface road is one of the most serious problems for urban transportation.Traditional intersection signal timing and ramp metering are independent with each other.After analyzing the causes of traffic problem,a control idea for connection zone is put forward,which takes the traffic conditions of both freeway and surface road into account.The control method proposed can effectively avoid the occurrence of traffic congestion of connection zone.

Abstract:Commenting on the domestic and international resources of urban development on the basis of research results,the significance of the resource-based cities urbanization performance study is revealed.Subsequently,the urbanization performance of the formation mechanism is discussed from the characteristic of urbanization of resource-based citie.Based on resource-based cities of the life cycle model,it indicated that the process of urbanization of resource-based cities is also the process of city transformation.It involves resources,industry,and spaces,which includes the changes of resource development from a single development to coordinated development,the transitions of industrial structure from the dual structure to the multi-structural,and the transformation of space structure from discretion to aggregation.Finally,it demonstrates the conversion of resources type city using Qianxi county in Hebei Province as an example.

Abstract:The secondary outflow of Handan East Sewage Treatment Plant and its advanced treated reclaimed water were taken as the evaluating objects.The fecal coliform group was taken as the health safety assessments index,and Monte-Carlo technology was used to carry on the simulation of model establishment and the certainty of probability distribution,then simulation of health safety certainty of evaluating objects which were reused for urban reclaimed water consumption was carried out by using Crystal Ball soft.The results show that the sanity safety of the secondary effluent and advanced treated effluent reused for scenic environment and groundwater recharge consumption will be lower without disinfections.So the disinfections process in advanced treatment process is necessary to ensure the sanity safety of reclaimed water.

Abstract:Run leaching experiments were carried out for study of there gularity of pollutant dissolution and release from coal gangue in Ji-dong high way.Some conclusions were drawn as follows,the main pollutant omponents released from coal gangue are the total hardnes,SO42+,total Fe,TDS,ect.The pH value of leaching liquid is in the range of 7.05～9.11,and there are still small amounts of or minim of Cl-,Mn,Cu and so on;The concentration of pollutants components is decreased with increase of rain fall;The amounts of pollutants released from coal gangue are attenuated in a negative exponential law,moreover,the attenuation law can be applied to predicting the intensity of soil and ground water pollution.It is concluded that using the coal gangue in the highway may pollute the ground water and surface water.

Abstract:A new method for training the artificial neural network is presented.In this method,the genetic algorithm(GA),a general-purpose global search algorithm is used to train the network with updating the weights to minimize the error between the network output and the desired output.Then the back propagation(RP) algorithm is used to further train the artificial neural network.The method is used to speed up the convergence and improve the performance.Experiment shows that the GA-neural network prediction model is good prediction precision.

Abstract:Aimming at the building envelopes in the radiant cooling and heating system,this paper analyzes the relationship between the thermal storage performance of radiant surface's materials and start-up or shut down time of heating and air-conditioning system.The impact of the external walls with different number and different types on indoor thermal environment is studied.It comes to the conclusion that the thermal storage coefficient of radiant surface's materials is greater,which will lead to better thermal stability,the longer lag time in temperature change.The external walls with different number will cause larger changes in indoor thermal environment.With the increase in the number of external walls,floor surface temperature should be raised in order to meet the requirements of indoor comfort.

Abstract:This paper introduces the advantages of remote sensing technology as well as several secondary seismic-induced geological disasters.And based on Ms8.0 Wenchuan Earthquake-induced geological disasters and the remote sensing data of seismic region,evaluating methods that the optical and radar remote sensing satellite data has been introduced respectively,and thematic information map has been gotten by the methods above.Finally the problem existing in the evaluation of the earthquake-induced geological disasters was summed up by remote sensing.

Abstract:This study based on Soil Erosion Classification Grade Criteria(SL 19096) issued by the ministry of water resources and the multifactor comprehensive method in the second national soil erosion investigation.QuickBird remote sensing image and DEM were used for data origin in this study.Soil erosion intensity in Baode mining area was assessed by three factors of vegetation coverage,farmland in slope and slope selected as assessing indices.GIS and remote sensing technology were employed in this study.The space distribution of soil erosion intensity in different degree and reason of this distribution were also showed in this paper.

Abstract:This paper summarizes the common methods for studying of skarns and skarn deposits both macroscopically and microcosmically,including remote sensing interpretation,physical geographical prospecting,field geological mapping,petrography(or mineralogy) and mineralogy,mineral phase equilibrium,fluid inclusion and stable isotope,the new means developed recently such as remote sensing interpretation and quantitive calculation for mineral phase equilibrium are introduced especially.The consideration of integration of macroscopic and microcosmic methods and constant introduction of new means in the skarn deposit studies have important significance in further revealing the formation and distribution of skarn deposits,and understanding their petrogenic and metallogenic mechanism.

Abstract:In view of the current hot issue "financial security",this paper establishes a pricing model of the financing flexibility to solve the problem through the dynamic planning theory according to the characteristics of option about the financing flexibility.Detailed analysis about the economic rationality of the financing flexibility is carried out by using the weighed theory of three factors.

Abstract:Whether a suitable partner is selected or not has a profound impact on the performance of the entire chain and the interests of all members.In order to improve the original methods of partner evaluation,we propose a theoretical evaluation model of the candidate partners based on Support Vector Regression.We construct a new index system from a new angle of view based on investigation and the existing outcomes.In addition,an empirical study has been conducted and the results show that the new model is effective and has a good ability of generalizing.So,we have provided a scientific and objective method for the managers' decision-making of the partner selection in supply chain management.

Abstract:Real estate project is characterized by long life cycle, huge investment,many participants and complex relationships,so there are lots of undefined risk factors in the performing process.These characteristics determine that the investors will inevitably face many risks in every stage of the whole processes especially in the earlier stage.Therefore taking earlier stage of real estate project as example,this thesis introduces extension engineering method into risk evaluation,and builds risk extension evaluation model.At the end the thesis takes Yishang international project in Handan city as a case to analyze.The results verify that the method is effective to make rapid and rational decision support for developer in earlier stage of real estate project.

Abstract:The paper introduces emphatically the application of the assessment of extension engineering method in the water environment and carries on the comparison with fuzzy assessment method which is the most widespread.The result indicates that the extension engineering method has a very good prospect for development with its unique thought model-matter-element model which made the results reliable and feasible in the environment quality appraisal.

Abstract:The products in the transesterification of phenol with diethyl oxalate over MoO₃/SiO₃ were analyzed by combined means of programmed temperature-capillary gas chromatography-mass spectrometry(GC-MS).The results indicated that the products of transesterification of phenol with diethyl oxalate were diphenyl oxalate and ethyl phenyl oxalate,respectively.

Abstract:This paper analyzes the time series of the traffic flow at Yuquanying freeway of Bejing from No.1 to 10 August 2006 and author finds the multifractal characters.The self-similarity of the time series of the traffic flow are found by using the method of power spectrum and statistical moments.The width,max.and asymmetry parameter of multifractal spectrum are employed in studying the traffic flow time series,which shows the strong degree of multifractality in the time series.This will provide an important theoretic foundation for researching multifractality in the theory of traffic time series.