Abstract
Experimental investigations on self-compacting concrete (SCC) under uniaxial monotonic and cyclic compression taking into account the stochastic constitutive relationship were reported and conducted. By introducing a practical method on plasticity characterization into the fiber bundle-plastic chain model, a new constitutive model based on the statistic damage approach for describing the stochastic mechanical responses of SCC under uniaxial compression was proposed. The comparison between the experimental results and the predictions demonstrated that the proposed model was able to characterize the salient features for SCC under both uniaxial monotonic and cyclic compression. Furthermore, the stochastic evolution (SE) of SCC under uniaxial compression and a comparison between the SCC and normally vibrated concrete (NVC) in certain aspects were analyzed and discussed; it was concluded that the stochastic constitutive relationship of SCC under compression can be understood by a media process of transition from microscale to macroscale.
Highlights
Cement concrete is widely used in railway, bridges, and buildings due to its excellent mechanical performance on the aspects of bearing capacity, durability, and other mechanical properties
By taking into account the stochastic constitutive relationship, an analytical model for describing the stressstrain response and plasticity of self-compacting concrete (SCC) was proposed. e proposed model was developed based on the fiber bundleplastic chain model (BCM) [20] and a practical method for simulating the plasticity of the quasibrittle materials [23, 24]
E validation of the proposed model was performed by comparison between the predictions and the experimental results. e comparison results revealed that the proposed model can effectively describe the stochastic constitutive relationship of SCC under both monotonic and cyclic compression tests
Summary
Cement concrete is widely used in railway, bridges, and buildings due to its excellent mechanical performance on the aspects of bearing capacity, durability, and other mechanical properties. A variety of essential topics associated with the mechanical properties of cement concrete have been well studied by researchers and practitioners. Among those topics, the stochastic mechanical behavior of cement concrete has received strong attention due to its uncertain effects on the structural optimization and safety control. A new type of high performance concrete named self-compacting concrete (SCC) is developed and increasingly implemented in the construction industries due to its inherent advantages of high fluidity, good segregation resistance, and distinctive self-compacting ability [1]. A variety of celebrated works have been conducted on relevant topics of SCC, and the details are illustrated as follows
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