Dissertation > Excellent graduate degree dissertation topics show

Research on the Calculation Theory and Design Method of Middle-high Ecological Composite Wall Hybrid Structure

Author: ZhangChengHua
Tutor: ZhaoDong
School: Xi'an University of Architecture and Technology
Course: Structural Engineering
Keywords: Middle-high ecological composite wall hybrid structure Seismic performance Composite material stiffness Ratio optimization Simplified calculation model
CLC: TU973.2
Type: PhD thesis
Year: 2013
Downloads: 34
Quote: 0
Read: Download Dissertation

Abstract


With the implementation and promotion of the twelfth five-year plan,the step of societyurbanization is speeding up further. Because of expanding scale of urbanization,suchproblems as shortage of land,construction of infrastructure falling behind and environmentalpollution have concentrated emergence. In order to solve the above problems,the city landutilization must be developed towards the direction of the integration and intensive,whichputs forward new demands in the ecological composite wall structure. Based on the abovepresent research situation and the previous research results,the middle-high ecologicalcomposite wall hybrid structure which is made up the ecological composite wall structureand vertical restrained components is put forward.This paper stands on the highlights of theteam for the middle-high ecological composite wall hybrid structure and the primary study isfocused on the seismic performance and theoretical analysis,collaborating work of structureand proportion optimization of component,simple calculation model by combination ofexperiment research,the theory analysis and numerical simulation. Based on this,the seismicdesign theory and construction measures of the hybrid structure are summarized. So it makesfull preparations for structure applications and gives neeessaly foundation for itsdevelopmeni and applications.The main research contents and the results are as follows:(1)Accordingtothetest researchonthemid-highrise ecological compositewall,thecoMParative analysis on the seismic performance of the bearing capacity,hystereticcharacteristics,tensility,strength degradation,stiffness degeneration on different types ofmiddle-high ecological composite wall. The results show that the sash of rib beam,columnand the vertical component constraints block stress and fracture development effectively. Thefailure of each element of block-sash-vertical constraint component model takes place inturn,and the multichannel seismic line is formed,which can make full use of differentcomponent of the energy dissipation ability. The skeleton curve of the wall is smooth and there is no mutation and no collapse occurred phenomenon from yield to destruction. Thewall has the strong ability to resist collapse. ABAQUS is used to build the middle-highecological composite wall numerical model,and the static elastoplastic analysis is carried on.The calculation results and test results of the load-displacement curve and the hingemechanism are all in good agreement. On this basis,the key parameters of the numericalextension analysis on the middle-high ecological composite wall is carried out and the keyfactors of vertical constraint limb thickness ratio,section forms,reinforcement ratio,sashform,axial compression ratio, the ratio of the influence rules of elastic stiffness,bearingcapacity,displacement ductility on the wall are obtained to establish reasonable foundation inthe mid-high rise ecological composite wall calculation theory and design method.(2)Based on the experimental study and numerical research,in view of the wallunique construction,elastic stage model-two-way fiber single composite material model isestablished suitable for mid-high ecological composite wall combined with compoundmaterial mechanics theory to deduce the wall elastic modulus and shear modulus practicalcalculation formula. Using elastic mechanics and considering all kinds of factors,anisotropicequivalent elastic plate resist lateral stiffness is derived. The orthogonal anisotropicequivalent elastic plate resist lateral stiffness is amended to revise. Results show that it has acertain theoretical basis and practical value to make the simplified model compound materialmechanics be used for the calculation of the ecological composite wall lateral stiffness, andthe results can satisfy the actual engineering calculation needs. In view of the wallmechanical characteristics and failure process,it gives the mid-high rise ecologicalcomposite wall limit state of shear resistance mechanism.The mid-high ecological compositewall inclined section of shear limit bearing capacity calculation formula is deduced. Based onthe shear resistance mechanism and the force equilibrium condition,the analysis results showthat the model can better reflect the ultimate bearing capacity of the middle-high ecologicalcomposite wall features and it can be applied to the ultimate bearing capacity of thecomposite wall calculation under different stress state. Based on the flat section assumption,the mid-high rise ecological composite wall of normal section of the bending ultimatebearing capacity calculation formula is deduced. At the same time limit compressive zoneheight is given to calculate the vertical constraint component reinforcement.(3)Combined with the mid-high rise ecological composite wall test and numericalsimulation results, according to its mechanical characteristics and structure characteristics,the paper puts forward the mid-high rise ecological composite wall composite structure underhorizontal loads of sandwich composite structure mechanics model. According to thedeformation coordination principle,the structure equilibrium differential equation and quantitative composite wall proportional relation of panel and vertical constraint memberbear load is establish. Analytical solution and numerical solution are coMPared to showthat the model provides a relatively simplified, practical analysis method for calculating theactual structural internal force and displacement. Based on the space collaborating workprinciple of the middle-high ecological composite wall hybrid structure,the calculationformula to meet the interlayer of the upper limit value of lateral angle of vertical constraintcomponents is deduced to quantify the vertical, horizontal vertical constraint component ratioand composite wallboard under the action of the different control factors (seismic grade, sitetype, the design group) to guide the middle-high ecological composite wall hybrid structuredesign.(4)In view of characteristics of the ecological composite wall panel inhomogeneousperiodic distribution, the appropriate unit cell is selected and the expression of unit cell modelis built.Using extreme energy value principle, the cyclical conditions, uniformity ofconditions and mathematical transform, and the macroscopic properties of the compositematerial mechanics expressions is got. Combining the microscopic mechanics finite elementmodel, the different scales of representative volume unit, boundary conditions, simulation ofrepresentative volume unit of strength test under load condition is established, therelationship of a representative volume unit equivalent material properties and theconstitutive is obtained, which verify the rationality by coMParing with the test results. Theresearch shows that the numerical model calculation and qualitative results are in goodagreement with the test results, using the method to determine the material properties canreflect wallboard macro performance. Using equivalent material properties and theconstitutive relation, the simplified numerical model for the whole process of themiddle-high ecological composite wall hybrid structure—the vertical restraint component-clad plate elastic-plastic mechanics model, and coMParing with the shaking table test resultsanalysis. The results show that the vertical constraint component clad plate elastic-plasticmechanics model can well simulate the elastic-plastic stage, the real dynamic characteristicsand failure process of the middle-high ecological composite wall hybrid structure. The modelis practical and can be applied to the nonlinear dynamic and static calculation analysis ofmiddle-high ecological composite wall hybrid structure.(5)Based on the early experiment and numerical simulation of the middle-highecological composite wall, and combining with engineering examples, the research anddiscussion is focused on layout of the middle-high ecological composite wall hybrid structure,structure type, concepts design principles(seismic level), design and construction of verticalconstraint component, the panel vertical connections and heat integration technology of ecological composite wall, in order to provide the reference for engineering applicationsfollow-up of middle-high ecological composite wall hybrid structure.The main innovations of this paper are as follows:(1)The seismic performance research of the middle-high ecological composite wallbased on the key parameters is carried out, the influence law of mechanical behavior of wallby the key factors is discussed.According to the test research on the mid-high rise ecological composite wall,thecoMParative analysis on the seismic performance of different types of middle-highecological composite wall.Using the validated the middle-high numerical model of theecological composite wall structure, finite ABAQUS based on key parameters (verticalconstraint limb-thickness ratio, section forms, reinforcement ratio, the sash form, axialcompression ratio, depth-width ratio) changing numerical extension analysis is put forward,the key factors on the wall stiffness, the influence law of bearing capacity and displacementductility is summed up, which lay the foundation of the reasonable establishment ofcalculation theory and design method of the middle-high ecological composite wall.(2)The lateral stiffness calculation formula and ultimate bearing capacity calculationformula of the middle-high ecological composite wall are established, which improves andsupplement theory analysis of the ecological composite wall.Based on the elastic stage model-two-way fiber single composite material model,anisotropic equivalent elastic plate resist lateral stiffness is derived. This fomula is used forthe calculation of the ecological composite wall lateral stiffness, and the results can satisfythe actual engineering calculation needs. Based on the shear resistance mechanism and theforce equilibrium condition,the mid-high ecological composite wall inclined section of shearlimit bearing capacity calculation formula is deduced.The analysis results show that it can beapplied to the ultimate bearing capacity of the composite wall calculation under differentstress state.Based on the flat section assumption,the mid-high rise ecological composite wallof normal section of the bending ultimate bearing capacity calculation formula isdeduced,which can be used to calculate the vertical constraint component reinforcement.(3)The work model of the middle-high ecological composite wall hybrid structure isestablished, and the ratio of vertical restraint components and composite wallboard isquantified under the action of different control factors.The laminated composite structure mechanics model of the middle-high ecologicalcomposite wall hybrid structure under horizontal load is put forward and the proportionalrelationship of bearing the load between composite wallboard and vertical restraint membersis quantified. The ratio of vertical constraint component and composite wallboard on the basis of the principle of working together under the action of different control factors isquantified (seismic grade, site type, the design group), which gives guidance to structuredesign of the middle-high ecological composite wall hybrid structure.(4)The vertical constraint component-clad plate elastic-plastic simplified numericalmodel for the whole process of the middle-high ecological composite wall hybrid structure,is established.By using the cycle medium homogenization theory and micromechanical finite elementmethod, different scale of representative volume unit, boundary conditions are set up,simulation of representative volume unit of strength test under load condition is proceed, thenthe equivalent material properties and the constitutive relation of a representative volume unitare obtained.Using equivalent material properties and the constitutive relation, the simplifiednumerical model of the whole process of the middle-high ecological composite wall hybridstructure——vertical constraint component-clad plate elastic-plastic mechanics model isestablished, which can be used in the nonlinear dynamic and static analysis of the hybridstructure.

Related Dissertations

  1. Mechanical Property Analysis on Concrete Short Columns with Strengthened Style Hoop,TU375.1
  2. Shaking Table Test Study on the Seismic Performance of the 1/2 Model of the Energy–saving Block & Invisible Multi-ribbed Frame Structure,TU352.11
  3. Study on Dynamic Characteristic & Seismic Performance of Single-Layer Cylindrical Latticed Shell with Different Supports,TU399
  4. Research of a New Buckling-Restrained Braces (BRB) on Engineering Application,TU352.11
  5. Doppler spectral domain optical coherence tomography imaging algorithm research,TP391.41
  6. Finite Element Analysis on Reduced Beam Section Connection of Steel Structure in House,TU391
  7. Performance-based Probabilistic Seismic Demand Analysis of Bridge Structures,U442.55
  8. Finite Element Analysis of Seismic Performance of Rc Beams Composite Strengthened with CFRP and Steel Plate,TU352.11
  9. Experimental study of corroded reinforced concrete beams seismic performance,TU352.11
  10. Study on the Performance Based Seismic Design of Portal Frame Light Steel Structures with Different Joint Forms,TU392.5
  11. Seismic Performance Analysis and Evaluation of RC Frame Strengthened with Externally Bonded Steel Based on Pushover,TU352.11
  12. Research on the Seismic Behavior of Mega RC Column、Steel Truss Beam Mix Frame Structures,TU352.11
  13. Analysis and Verification on Seismic Performance of Masonry Building with Concrete Frame-Shear Wall Structure on First Two Stories,TU352.11
  14. Finite Element Analysis of Rc Shear Wall Member with Bi-directional Single Row Steel Bars Based on ABAQUS,TU352.11
  15. Study on the Nonlinear Seismic Performance of Structure Supported by Foundations with Different Locations,TU352.11
  16. Seismic Performance and Countermeasures of Primary and Secondary School Buildings,TU352.11
  17. The Finite Element Analysis and Study on Design Method of the Prestressed Concrete Circular Silo,TU311
  18. Push-over Analysis of Existing Building Structures for Seismic Performance Evaluation,TU352.11
  19. Application of New Crop Straw Composite Wall,TU111.4
  20. Lancang steel pipe reinforced with concrete arch bridge seismic performance analysis,U442.55
  21. The dwarf tower cable-stayed bridge seismic response analysis and mitigation and isolation,U442.55

CLC: > Industrial Technology > Building Science > High-rise buildings > Tall Building Structures > Structural Analysis and Calculation
© 2012 www.DissertationTopic.Net  Mobile