Biaxial steel plated concrete constitutive models for composite structures: Implementation and validation: Fid-Bau Portal

Biaxial steel plated concrete constitutive models for composite structures: Implementation and validation

Zhou, Tianmin / Wang, Jiaji / Sawab, Jamshaid / Chen, Hongbing / Mo, Y.L.

Abstract The Steel-plated Concrete (SC) technique is an alternative construction technique with faster onsite construction speed, reduced construction time, and increased structural performance. Aiming to predict the force transfer mechanism of SC elements, an innovative constitutive model package is proposed by implementing experimental-based biaxial steel plate concrete models into the nonlinear finite element (FE) model “Membrane Model of SC (MM-CS).” First, the formulation and implementation of the MM-SC is illustrated in detail, including the equilibrium and compatibility equations and the implementation of constitutive models. Subsequently, various experimental data of SC members are selected and simulated using the proposed MM-SC model. In this research, two types of structures, SC panels and framed SC shear walls, and three types of loading conditions, including uniaxial compression, pure shear, and combined axial-flexural-shear tests, are analyzed respectively. Good agreements were obtained between the reported results and the FE simulation results in terms of yield capacity and ultimate capacity, proving the reliability of the implemented analytical constitutive material models and the biaxial membrane model formulations.

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Highlights • The finite element program for high-fidelity simulation of steel plated concrete is implemented in OpenSees. • The proposed finite element program includes the confinement effect and strength degradation of cracked concrete in composite member. • The panel tests of composite members in the literature are simulated and by the proposed program. • The experimental results of composite shear walls are well predicted by the developed program.