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Distribution and Evolution of Damage Field for a Reinforced Concrete Arch Structure in Its Failure Process

ZHOU Yan-qun,TANG Xue-song(College of Bridge and Structure Engineering,Changsha University of Science and Technology,Changsha 410076,China)  
The damage and failure problem of a reinforced concrete structure under static loading is discussed based on the continuum damage theory.The concrete is a quasi-brittle material that can be treated as the elastic damage problem.A damage constitutive model with four independent parameters is derived from the three-order form of the elastic damage theory that is established on the second law of thermodynamics.A tension-compression parameter is introduced into the damage constitutive model,for example,it can describe the different damage behaviors of concrete under tension and compression conditions.An arch rib was removed from an old bridge.The failure experiment was performed.The failure process was simulated numerically using FEM.The theoretical predictions are consistent well with the experimental results.It indicates that the proposed damage model can be applied to describe the damage behaviors of the reinforced concrete arch structures.
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