Capacidade de deformação de elementos de betão armado com empalmes sujeitos a carregamento cíclico: Investigação experimental
(2019) 11º Congresso Nacional de Sismologia e Engenharia Sísmica — Location: Lisboa (29.April.2019)
Files
Tarquini_Almeida_Beyer_SISMICA2019.pdf
Open Access - Adobe PDF
- 1.07 MB
Details
- Authors
- Abstract
- Lap splices are essential to avoid premature failure of reinforced concrete structural members. Before modern earthquake guidelines, lap splices were often placed in plastic hinge regions that undergo inelastic deformations under seismic loading. The seismic performance assessment of such members requires not only the evaluation of the lap splice strength but also its deformation capacity. While the former was assessed in several previous studies, the latter is still rather unknown. This paper addresses the results of a recently concluded experimental programme on spliced RC walls boundary elements tested under uniaxial tension-compression cyclic loading. The study investigated the influence of lap splice length, confining reinforcement and loading history on the deformation capacity of lap splices. The test results showed that the deformation capacity of lap splices: (i) increases with lap splice length; (ii) increases with confining reinforcement, although its effectiveness is dependent on the lap splice length; (iii) decreases with larger imposed compression levels; (iv) is larger for bottom-casted with respect to top-casted lap splices. Finally, an empirical model is proposed to estimate the strain capacity of lap splices, which provides a good fit with the experimental results.
- Affiliations
Citations
Tarquini, D., Saraiva Esteves Pacheco De Almeida, J., & Beyer, K. (2019). Capacidade de deformação de elementos de betão armado com empalmes sujeitos a carregamento cíclico: Investigação experimental. 11º Congresso Nacional de Sismologia e Engenharia Sísmica, Lisboa. https://hdl.handle.net/2078.5/222903