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A platform for research: civil engineering, architecture and urbanism
Comparative study between local and average constitutive models for reinforced concrete panels
Abstract This article presents a calculation procedure for the Cracked Membrane Model (CMM) using optimization techniques based on previous works. For this purpose, the proposed calculation routine is divided into two phases. The first phase consists of determining the initial estimation of the solution through a linear truss model with average stresses and strains, the Mohr Compatibility Truss Model (MCTM). In the second phase, an optimized calculation procedure to solve the system of nonlinear equations of the CMM is proposed, taking the solution of the MCTM as the initial estimate for the first iteration. The obtained solutions are compared with the experimental and numerical results found in the literature, where good accuracy and low computational cost were observed. Additionally, a comparative study is presented between average constitutive models (Rotating-Angle Softened Truss Model (RA-STM)), where the equilibrium is evaluated using average stresses, and local constitutive models (CMM), where the equilibrium is calculated at the crack. Focus was given to the steel reinforcement behavior at the crack. A modified Wood&Armer method was also used. The overall RC panels’ behavior predicted by RA-STM and CMM was close to the experimental results, including the failure stress. It is discussed the advantage of using local models in problems where the reinforcement maximum stress is of interest, such as fatigue problems and crack opening calculation. This paper aims to contribute to developing efficient strategies for modeling RC structures using local models, especially in design problems where the evaluation of the maximum reinforcement stress is fundamental.
Comparative study between local and average constitutive models for reinforced concrete panels
Abstract This article presents a calculation procedure for the Cracked Membrane Model (CMM) using optimization techniques based on previous works. For this purpose, the proposed calculation routine is divided into two phases. The first phase consists of determining the initial estimation of the solution through a linear truss model with average stresses and strains, the Mohr Compatibility Truss Model (MCTM). In the second phase, an optimized calculation procedure to solve the system of nonlinear equations of the CMM is proposed, taking the solution of the MCTM as the initial estimate for the first iteration. The obtained solutions are compared with the experimental and numerical results found in the literature, where good accuracy and low computational cost were observed. Additionally, a comparative study is presented between average constitutive models (Rotating-Angle Softened Truss Model (RA-STM)), where the equilibrium is evaluated using average stresses, and local constitutive models (CMM), where the equilibrium is calculated at the crack. Focus was given to the steel reinforcement behavior at the crack. A modified Wood&Armer method was also used. The overall RC panels’ behavior predicted by RA-STM and CMM was close to the experimental results, including the failure stress. It is discussed the advantage of using local models in problems where the reinforcement maximum stress is of interest, such as fatigue problems and crack opening calculation. This paper aims to contribute to developing efficient strategies for modeling RC structures using local models, especially in design problems where the evaluation of the maximum reinforcement stress is fundamental.
Comparative study between local and average constitutive models for reinforced concrete panels
Beatriz da Costa Fernandes (author) / Jordlly Reydson de Barros Silva (author) / Bernardo Horowitz (author) / Luís Filipe Almeida Bernardo (author)
2025
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
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