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Experimental Investigation of Bond Performance between Reinforcement and Concrete Simulate Subjected after Fire

Author: WuZuo
Tutor: ChenLiGang
School: Qingdao Technological University
Course: Structural Engineering
Keywords: High temperature Reinforced concrete Adhesive force τ-S curve Reduction coefficient of Ultimate bearing capacity
CLC: TU375
Type: Master's thesis
Year: 2009
Downloads: 41
Quote: 0
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Abstract


The adhesive force between the steel and concrete is a guarantee of two different materials to work together . Generally reinforce the design of the building after the fire , the fire temperature is lower , usually ignored the damage caused by the fire on the adhesive force ; For high temperature fire , usually that the complete loss of cohesion in the reinforcement ignored when designing the original reinforced and re- reinforcement . In order to improve the building fire reinforcement design and economic Experimental study of high temperature steel and concrete cohesion is very necessary. Test method : The member is heated to a specified temperature and a constant period of time , to ensure that the member and outside temperature ; pending member naturally cooled to room temperature, and is pulled out through the \the instantaneous tension of the test piece and the corresponding slip amount . In this paper, on the basis of the pilot study investigated the following : by regression analysis of the test data , reinforced concrete bond stress - slip model for different temperatures indicated by the continuous curve equation ; raised the temperature of the bond stress reduction factor concept , and gives the the bond stress temperature reduction factor corresponding temperature relationship ; commonly used in high-temperature flexural members the ultimate bearing capacity calculated to amend the original basic assumptions , and recommended by the original calculation method before the calculation of the failure modes of reinforced concrete after high temperature judgment. Contrast to the conclusions of the previous bond performance of reinforced concrete after high temperature , verify the reasonableness and validity of the conclusions of this study . The paper concludes as fire damage assessment of reinforced concrete structures , reinforcement design and nonlinear finite element analysis is based .

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