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Study on the Ductility of Reinforced Concrete Flexural Member

Author: ChangYingYing
Tutor: GongJinZuo
School: Dalian University of Technology
Course: Structural Engineering
Keywords: Reinforced concrete Ductility Moment Redistribution Cut Plastic deformation
CLC: TU375
Type: Master's thesis
Year: 2011
Downloads: 95
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Abstract


Reinforced concrete flexural members is widely used in industrial and civil construction design , plastic design of reinforced concrete structures highlight the important role especially in the senior civil construction and design of large - scale industrial plants . In general , the safety of reinforced concrete flexural members , depends not only on the bearing capacity of the component , still depends largely on the performance of the plastic deformation that ductility . The ductility of this paper is divided into three parts . ( 1) The study reinforced concrete bending member ductility factor and plastic hinge rotation capacity calculation , gives the tensile reinforcement yield and concrete reaches the ultimate compressive strain or tensile reinforcement to achieve the ultimate tensile strain of concrete compression zone height formula ; compare the norms of our country , the United States norms and European specification minimum and maximum longitudinal reinforcement ratio within the reinforced concrete member plastic rotation capacity ; derived plastic moment the redistribution coefficient with relative compression zone height relationship . The study shows that the reinforcement ratio of maximum reinforcement ratio of beam no longer has the ability to plastic deformation due to our specification of the maximum longitudinal reinforcement ratio corresponding to the limits of destruction , deformation capacity is not large , even without the maximum reinforcement ratio . ( 2) 27 reinforced concrete beam tests. Studies show that increasing the stretch reinforcement ratio will reduce plastic rotation capacity ; increased section height will reduce plastic rotation capacity : loading at the plastic rotation capacity constraints will increase . ( 3) study the deformation capacity of reinforced concrete beams considering shear effects . Shear tension zone pressure field theory describes . The study shows that , considering shearing effect of plastic deformation than not consider the shear effect of plastic deformation , which is additional tension caused by shear diagonal crack , reinforced ahead of the yield , increased the length of the plastic hinge .

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CLC: > Industrial Technology > Building Science > Building structure > Concrete structure,reinforced concrete structure > Reinforced concrete structures
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