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Study on Restoring Force Model and Nonlinear Behaviors of Reinforced Concrete Deep Beams Infilled Steel Frame

Author: XiaoFeng
Tutor: ZhengHong
School: Chang'an University
Course: Structural Engineering
Keywords: reinforced concrete deep beam steel frame hysteretic behavior restoring force model finite element analysis nonlinear behavior
CLC: TU398.9
Type: Master's thesis
Year: 2009
Downloads: 185
Quote: 3
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Abstract


Steel frame and shear wall infilled steel frame reflect two endpoints of the amplitude of the structural stiffness.The increase of stiffness is transilient.Reinforced concrete deep beams infilled steel frame can meet the required stiffness between the two endpoints and can adjust the structual stiffness within a wide range.By changing width,thickness,reinforced ratio,etc, of the reinforced concrete deep beams,it could obtain different lateral rigidities,ultimate bearing capacities,ductilities and energy dissipation capacities.Therefore,the structure system can effectively improve the disadvantage of the brittle shear damage of shear wall structure,moreover,reinforced concrete deep beams uses the assembly type,so it can be connected easily,be prefabricated and be repaired after earthquack.This structure can applied to both new buildings and the reinforcement of established buildings.Thus it shows great theoretical research value and broad application foreground.At present,the research of reinforced concrete deep beam infilled steel frame abroad is at the very initial stage.In China,this research is nearly blank.In this paper,low-cycle loading test method is employed to study on the experiment of pure steel frame and steel frame infilled reinforced conctete deep beam of different depth-width ratio.By analyzing the hysteretic loops,skeleton curve,distribution of stress,deformation behaviour,ductility coefficient and the energy dissipation coefficient of each specimen,we can get the influence of infilled different depth-width ratios reinforced eonctete deep beam on hysteretic behaviors of steel frame.Than it can obtain the restoring force model by fitting the skeleton curve and stiffness of each load through test data for elastoplastic analysis.The paper uses finite element software ABAQUS to set up model and verify the skeleton curve of test specimens to find reasonable simulation method,than apply the method to analyse series of parameters which can influence the performance of reinforced concrete deep beams in filled steel frame structure system for getting the impact law of depth-width, thickness,reinforced ratio of embedded column and distributing bars of reinforced concrete deep beam,ratio of axial compression stress to strength of steel frame column on the structure system.At last,the paper obtains reasonable ranges of parameters.

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CLC: > Industrial Technology > Building Science > Building structure > Composite structure > Other composite structures
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