Dissertation > Excellent graduate degree dissertation topics show

Elastic-plastic Buckling Analysis of Suspen-dome

Author: WangLong
Tutor: LiuShuTang
School: Guangzhou University
Course: Disaster Prevention and Reduction Engineering and Protective Engineering
Keywords: suspen-dome buckling elastic-plastic ultimate bearing capacity conceptual analysis
CLC: TU399
Type: Master's thesis
Year: 2013
Downloads: 35
Quote: 0
Read: Download Dissertation

Abstract


Combined finite element animation with mechanical conception，author studied somefactors，such as connection rigidity，nonlinearity of material，initial deficiency，level ofprestress，density of grid，initial curves of member and configuration of circular cable，andput forward some suggestions for structural analysis in technical design stage.Then basedon conceptual analysis，author studied principles of nodal load-deflection curves，structureoverall load-deflection feature and distribution of element stress. Major conclusions are asfollows:1) Features of distribution of deformation and stress of suspen-dome can be explainedby model of ‘arch with tied-rod’.Like differences between under-reinforced beam andover-reinforced beam，suspen-dome can be divided into two types:under-cabled beam andover-cabled.2) Bearing capacity of under-cabled suspen-dome was determined by strength ofcircular cable.nonlinearity of this type is not strong，and its bearing capacity is proportionalto distance between arch top and circular cables.Influence of initial deficiency is notobvious.Influence of level of prestress force to bearing capacity and structural stiffness isnot that obvious also.The difference is that， the more prestress， the more reversedeformation.3) Bearing capacity of over-cabled suspen-dome was determined by strength of singlelayer dome.nonlinearity of this type is pretty strong.Influence of initial deficiency is prettyobvious.Influence of level of prestress force to initial structural stiffness is not that obviousalso，but higher prestress can raise stiffness of later stage，and hensethe it can raise bearingcapacity.Both types can reduce deformation in service stage by increasing prestress force.4) Influence of initial deficiency can be considered by modified consistent imperfectbuckling analysis method.The more distribution of imperfection is close to middle stage ofthe whole deformation process，the more adverse influence to bearing capacity.Underadverse distribution of imperfection，bearing capacity decrease as size of imperfectionincrease.5) Technical specification for space frame structures assume that:geometricalnonlinearity bearing capacity is2.1times of elastic-plastic bearing capacity.But according toresults of author，this ratio is about1.6. So it is necessary to carry out elastic-plasticanalysis.6) Density of grid is critical to bearing capacity，and influence of initial curves can beoverlooked.7) As load rises，inner cable-strut system slacks and back out.So it can be omitted，andonly keep the outer ring.Cable-strut system can reduce the difference between circularmember and radial member，and make member force more even.

Related Dissertations

  1. Study on Mechanical Property of Plug-pin Steel Tube Scaffold Platform,U673.3
  2. Stress folds regularity and the realization of a large area of ??ordered structures,TB383.1
  3. Research on Bursting Pressure of Safety Valves and Bursting Disc Safety Devices in Combination,TH49
  4. Copper spin necking punch forming numerical modeling and simulation,TG386
  5. Study of Buckling in Continuous Annealing Process Line and the Improvements,TG156.2
  6. Buckling Behavior of Carbon Nanotubes under Simple and Combined Loading,TB383.1
  7. Buckling and Postbuckling Research of Stiffened Composite Panel Containing Damage,TB33
  8. Cold-formed steel channel column curling research,TU392.1
  9. Based on analysis of buckling restrained brace simulation and experimental study,TU317
  10. Reinforcement measures distortional buckling steel beam research to prevent curling Z,TU392.1
  11. Research on Axial Compression Bearing Capacity of Multi-limbs Section Built-Up Cold-Formed Steel Stub Columns,TU392.1
  12. Study design techniques stiffened steel plate shear wall considering vertical load,TU391
  13. Experimental Studies on the Effect of Ductility Properties of Reinforcing Steel on Seismic Behavior of Columns,TU352.11
  14. Analysis on the Mechanical Behavior and Application of Buckling Restrained Braces,TU352.11
  15. Study on the Local Buckling Influence of the Capacity of Axial Compression Q420 High-strength Angle Column,TU312.1
  16. Analysis and Research on Static, Dynamic and Stability Performance of Elliptic Suspendome Structure,TU399
  17. The Design and Seismic Performance Analysis of Buckling Restrained Braced Steel Frames,TU352.11
  18. Analysis and Research on Static and Seismic Stability Performance of Schwedler Suspen-dome,TU399
  19. Research on the Stability of Q420 High Strength Steel Equal Single Angle Members under Axial Compression,TU312.1
  20. Seismic Analysis on Buckling Restrained Braced Steel Frame and Research on its Structural Influencing Coefficient,TU391
  21. The Study on the Effect of the Lateral Braces on the Out-of-plane Stability of Circular Arches,TU391

CLC: > Industrial Technology > Building Science > Building structure > Other structures
© 2012 www.DissertationTopic.Net  Mobile