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Experimental Research and Finite Element Analysis of RC Beam with Non-contact Splicing of Bars

Author: XiaoXia
Tutor: ChenQingLai
School: Shandong University
Course: Structural Engineering
Keywords: Reinforced concrete Charpy Non-contact lap Carrying capacity Test Nonlinear ANSYS
CLC: TU375.1
Type: Master's thesis
Year: 2008
Downloads: 67
Quote: 1
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Abstract


Reinforced concrete is a material widely used in civil engineering, reinforced concrete components of the construction process, there are a lot of reinforced connections. \Reinforced banding lap is easy to operate, reliable performance, widely used in our construction. Banding lap including the contact lap and the non-contact lap two connections. Commonly used by China in the construction of the contact lap, lap reinforced the gap between the very narrow and can not accommodate concrete particle aggregate, thus between two lap reinforced concrete entities, the concrete can not be completely wrapped grip reinforced can not achieve maximum bond anchoring role, diminished force transfer two lap reinforced by concrete results, therefore, can not be a good host common steel and concrete works. Reinforced non-contact lap requires clear distance between starter bars about the size of coarse aggregate concrete, the concrete can bond steel, two opposite reinforced by concrete anchoring force transmission of the respective bond pass force principle is clearly more effective than reinforced contact lap. China this apparently little more reasonable connection, therefore, it is necessary to increase the non-contact lap joint research on reinforced. This paper studies the contents: a reinforced lap constructor mechanism and domestic and international norms relevant provisions. 2 according to the requirements of the subject, were used in order to study the tensile reinforcement using non-contact lap joint force transmission condition, design, and production of two non-contact lap contact lap longitudinal reinforcement lap was 25%, two lap longitudinal non-contact lap contact tendons lap rate of 100%, and a longitudinal reinforcement used in all rebar, a total of five longitudinal reinforcement ratio reinforced concrete full scale of Charpy specimens, its were symmetrical concentrated loads under normal section bearing capacity comparison test. This paper describes the test specimen and the failure pattern analysis of the ultimate bearing capacity of the specimen under load at all levels of load - deflection curves, lap area reinforced stress transfer law. 3 Description of the reinforced concrete structure nonlinear finite element analysis of the significance of the research methods and basic theory. ANSYS software, of five reinforced concrete Charpy nonlinear finite element analysis. ANSYS simulation test process, numerical analysis and experimental results. The results show that using non-contact lap connections effectively reinforced, reliable transmission of forces; same reinforcement ratio and lap length, reinforced with non-contact lap joint force transmission outperforms contact lap; the same lap mode, the beam than the lap lap was 25% less rate of 100% of the beam deformation, ultimate bearing capacity; rebar beam crack resistance and ultimate bearing capacity are better than using Lap reinforcement beams, but the contact lap and also meet the requirements of the design capacity.

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