Tridimensional Long-Term Finite Element Analysis of Reinforced Concrete Structures with Rate-Type Creep Approach
Source abstract
Abstract
This paper presents a general procedure for a rate-type creep analysis (based on the use of the continuous retardation spectrum) which avoids the need of recalculating the Kelvin chain stiffness elements at each time step. In this procedure are incorporated three different creep constitutive relations, two recommended by national codes such as the ACI (North-American) and EC2 (European) building codes and one by the RILEM research association. The approximate expressions of the different creep functions with the corresponding Dirichlet series are generated using the continuous retardation spectrum approach based on the Post–Widder formula. The proposed rate-type formulation is implemented into a 3D finite element code and applied to study the long-term deflections of a prestressed concrete bridge built in Romania, which crosses a wide artificial channel that connects the Danube river to the port of Constanta in the Black Sea.
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Research context
OpenAlex topics: Concrete Properties and Behavior · Fire effects on concrete materials · Innovative concrete reinforcement materials
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Affiliations
Department of Civil and Environmental Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
Lombardi Ingegneria srl, Via Giotto 36, 20145 Milan, Italy
Funding
Italrom Inginerie Internationala S.r.l. through Lombardi Ingegneria srl, Via Giotto 408 36, 20145 Milan, Italy.
References (47)
Show source-provided references
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