Dissertation > Excellent graduate degree dissertation topics show

Research on Bearing Capacity of Corroded Reinforcement Concrete Component

Author: ZhuHongQiang
Tutor: YangXiaoMing
School: Liaoning Technical University
Course: Structural Engineering
Keywords: reinforcement corrosion electrochemical accelerated corrosion research on bearing capacity numerical simulation
CLC: TU375
Type: Master's thesis
Year: 2013
Downloads: 5
Quote: 0
Read: Download Dissertation

Abstract


Reinforcement corrosion can directly affect structure’s applicability and safety,accidents caused by structure failure happen sometime. How to evaluate these corrodedstructures and predict their residual capacity is an urgent problem in current civilengineering. This article research on from three respects mainly: the mechanism ofreinforcement corrosion in concrete and the study of electrochemical acceleratedcorrosion experiment, non-rust finite element model validation and the corroded finiteelement simulation study.Firstly, the mechanism of reinforcement corrosion in concrete is analyzed deeply inthe paper. There are two steps to be corroded for reinforcement in concrete. At first,reinforcement surface passivated membrane is damaged by concrete neutralization andchloride penetration, then the reinforcement is activated renewedly without protection,at last the bar is corroded. Based on the mechanism of reinforcement corrosion inconcrete, the study of electrochemical accelerated corrosion experiment is done, thestudy of the correlation between all kinds of corrosion experiments and actual structureis also analyzed, which provides theoretical basis to design the electrochemicalaccelerated corrosion experiment.Secondly, the experiment research and the finite element model validation is done.Six reinforced concrete simply supported beams are made, the scantling is morepractical. A new tool of stirrup kinking is designed. A new insulation level modes isadopted at the contact position between the longitudinal reinforcement and the stirrup.Distributive girder, reaction beam and template are designed and built. By the loadingtest of simply supported beams, the following conclusions can be drawn: the non-rustfinite element model is reasonable, which prepares for the numerical simulation on loadcarrying capacity of corroded RC beam considering Bond-Slip.Finally, Based on the Bond-Slip between the steel bars and concrete, the finiteelement models of reinforcement concrete simply supported beam with differentcorrosion rates are built for analyzing the load carrying capacity of corrodedreinforcement concrete beam. In the model SOLID65, LINK8and Combine39are usedto simulate concrete, steel bar and bond-slip between bars and concrete in ANSYS. The effect of corrosion ratio on bonding force between bars and concrete are simulated byadjusting the parameter of combine39. Besides, the area reduction of bar’s section anddecrease of yielding stress are also considering for calculating the load carrying capacityof RC beam under different corrosion ratios. The results shows with the corrosion ratioincreasing the stiffness of beam should decrease, slip between bars and concrete shouldbe larger, the load carrying capacity should obviously decrease and ductile failureshould turn to brittle failure.

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. Study on Springback of High-Strength Steel Stamping,TG386
  3. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  4. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  5. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  6. Numerical Simulation of Biomass Direct Reburning,TK16
  7. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21
  8. The Design and Performance Simulation of External Valve Small Displacement Pump,TE933.3
  9. Jiyuan Oilfield long reservoir evaluation and development technology policy research,P618.13
  10. Three-dimensional reconstruction and cochlear basement modal Numerical Simulation,R764
  11. Stress distribution law FLAC 3D simulation study,TU452
  12. Changchun High- temperature low-pressure ridge containing wax reservoir development and technological measures,TE349
  13. Usage of Balance Supporting Technology for Weak and Fractured Surrounding Rocks of Roadways in Deep Shaft in Yangchen Colliery of Jining Mining Groupcompany,TD353
  14. Study on Non-Continuous Disintegrate in Surroundding Rock of Deep Roadway,TD325
  15. The Value Simulation of the Filtration Process by Fiber Filter Materials,TB34
  16. Study on the Optimization of Deep Stope Support Parameters and Mining Sequence of Xingcheng Gold Mine,TD35
  17. Analysis of Sound Transmission Loss Through Multiple Structures Containing Foam Aluminum,TB383.4
  18. Numerical Simulation and Process Research for Metal Sheet Single Point Incremental Forming,TG306
  19. Design and Simulation of a tobacco flavoring feeding machine,TS43
  20. Numerical Simulation and Experimental Research of Cadmium Removal in ф75/ф100 Hydrocyclone,X703
  21. Study on the Stress of Distribution in Surrounding Rock and Anti-Rockburst Design in Boundary Coal Stope,TD311

CLC: > Industrial Technology > Building Science > Building structure > Concrete structure,reinforced concrete structure > Reinforced concrete structures
© 2012 www.DissertationTopic.Net  Mobile