Applied loads; Constitutive relationships; Crack-width; Dapped ends; End connections; First principles; Predictive models; Shear behaviour; Shear crack; Structural assessments; Civil and Structural Engineering; Building and Construction; Materials Science (miscellaneous)
Abstract :
[en] For the structural assessment of reinforced concrete dapped-end connections, it is necessary to have predictive models which link the crack widths measured on-site to the applied load. This paper presents a kinematics-based model derived based on first principles: equilibrium, compatibility, and constitutive relationships, to predict their shear behaviour. The formulation explicitly models the critical shear crack which extends from the inside edge of the support plate to the top of the hanger reinforcement. The deformation of the block above this critical shear crack is idealized by two degrees of freedom. Based on these deformations, forces of different shear carrying mechanisms are computed using appropriate constitutive relationships. The equilibrium of these forces allows to calculate the applied shear force for a given deformation. The proposed model is validated with the experimental data available in the literature for both strength and crack width predictions.
Disciplines :
Civil engineering
Author, co-author :
Hippola, Sameera ; Université de Liège - ULiège > Urban and Environmental Engineering
Mihaylov, Boyan ; Université de Liège - ULiège > Département ArGEnCo > Structures en béton
Language :
English
Title :
Modelling the Shear Behaviour of Reinforced Concrete Dapped-End Connections
Publication date :
28 August 2024
Event name :
fib PhD symposium in Civil Engineering 2024
Event place :
Budapest, Hungary
Event date :
28-08-2024 => 30-08-2024
Audience :
International
Main work title :
Proceedings of the 15th fib International PhD Symposium in Civil Engineering, 2024
Editor :
Balázs, György L.
Sólyom, Sándor
Publisher :
fib. The International Federation for Structural Concrete
ISBN/EAN :
978-2-940643-24-0
Peer review/Selection committee :
Peer reviewed
Funding text :
This research was partially funded by the Joseph Deprez Foundation of University of Li\u00E8ge: Sameera Hippola, grant holder of Joseph Deprez Foundation.
Johnson, P., Couture, A., and Nicolet R. 2007. “Commission of inquiry into the collapse of a portion of the de la Concorde overpass.” Library and National Archives of Quebec, Canada.
Di Prisco, M., Colombo, M., Martinelli, P., and Coronelli, D. 2018. “The technical causes of the collapse of Annone overpass on SS. 36.” Italian Concrete Days 2018, Lecco, Italy.
Rajapakse, C., Degée, H., and Mihaylov, B. 2022. “Investigation of shear and flexural failures of dapped-end connections with orthogonal reinforcement.” Engineering Structures 260:114233. doi:10.1016/j.engstruct.2022.114233.
Rajapakse, C., Degée, H., and Mihaylov, B. 2024. “Investigation of shear and flexural failures of dapped-end connections with diagonal reinforcement.” (Accepted for publication in ACI Structural Journal)
Schlaich J., and Schafer K. 1991. “Design and detailing of structural concrete using strut-andtie models.” The Structural Engineer 69(6):113–25.
Cook W., and Mitchell D. 1988. “Studies of disturbed regions near discontinuities in reinforced concrete members.” ACI Structural Journal 85(2):206–16.
Mata-Falcón J., Pallar ́es L. and Miguel P. 2019. “Proposal and experimental validation of simplified strut-and-tie models on dapped-end beams. ” Engineering Structures 183: 594–609. doi: 10.1016/j.engstruct.2019.01.010
CEN European Committee for Standardization. Eurocode 2. Design of concrete structures Part 1-1: General rules and rules for buildings. Brussels (Belgium): EN 1992-1-1; 2004.
Mata-Falcón, J. 2015. “Serviceability and Ultimate Behaviour of Dapped-end Beams (In Spanish: Estudio del comportamiento en servicio y rotura de los apoyos a media madera).” PhD diss., Universitat Politècnica de València.
Muttoni, A., Fernandez, M., Niketic, F., and Backes R. 2016. “Assessment of existing structures based on elastic-plastic stress fields-Modelling of critical details and investigation of the inplane shear transverse bending interaction.” Rapport OFROU, N◦680, pp. 134, Switzerland.
Vecchio, F., and Collins, M. 1986. “The modified compression field theory for reinforced concrete elements subjected to shear.” ACI Structural Journal 83:219–31.
Vecchio, F. “Disturbed stress field model for reinforced concrete: implementation.” Journal of Structural Engineering 26(9):1070–7.
Rajapakse, C., Degée, H., and Mihaylov, B. 2021. “Assessment of Failure along Re-Entrant Corner Cracks in Existing RC Dapped-End Connections.” Structural Engineering International 31(2):216–26. doi: 10.1080/10168664.2021.1878975.
Mihaylov, B., Bentz E., and Collins M. 2013. “Two parameter kinematic theory for shear behaviour of deep beams” ACI Structural Journal 110(3):447-456. doi: 10.14359/51685602.
Popovics, S. 1973. “Numerical approach to the complete stress-strain curve of concrete.” Cement and Concrete Research 3(5):583-599.
Mihaylov, B., Hunt, B., Bentz, E., and Collins M. 2015. “Three-Parameter Kinematic Theory for Shear Behavior of Continuous Deep Beams.” ACI Structural Journal 112(1): 47-58. doi: 10.14359/51687180.
Marti, P., Alvarez, M., Kaufmann, W., and Sigrists, V. 1998. “Tension Chord Model for Structural Concrete.” Structural Engineering International 8(4):287-298.
Li, B., Maekawa, K., and Okamura, H. 1989. “Contact Density Model for Stress Transfer Across Cracks in Concrete.” J. Faculty Eng., University of Tokyo (B), vol. 40, No. 1: 9–52.
Mihaylov, B,. 2015 “Five-spring model for complete shear behaviour of deep beams.” Structural Concrete 16(1): 71-83. doi: 10.1002/suco.201400044
