Title:
Performance of Ductile FRCC under Cyclic Loads and Non-Linear FE Simulation
Author(s):
Georgiou, A.; Pantazopoulou, S.
Publication:
Symposium Paper
Volume:
343
Issue:
Appears on pages(s):
310-320
Keywords:
Strain Hardening cementitious concrete; reversed cyclic loading; deformation capacity; ductility.
DOI:
Date:
10/1/2020
Abstract:
With the advent of strain hardening fiber reinforced cementitious composites (SHFRCC) the development of a new generation of structural systems that benefit from the inherent ductility of concrete in tension in order to reduce the amounts of transverse reinforcement (stirrups), shear strength, and tension-force development capacity to the main reinforcement is possible.
In this study a number of tests are conducted to explore the behavior of SHFRCC materials under cyclic loads, simulating seismic effects. The experimental responses of two half-scale
interior beam column connections subjected to reversed cyclic loading are compared; one of the connections was constructed with a cementitious matrix without fibers, and was detailed
according with the Eurocode provisions for ductility class M (moderate, μ=3.5). The other connection was constructed with a SHFRCC mix; (2% by volume of PVA fibers was used to
reinforce the matrix and the minimum amount of shear reinforcement allowed by Eurocode 2 for non-seismic detailing was used in the specimens). Several supporting experiments were also conducted to support analysis of the cyclic behavior (uniaxial tension, compression, splitting tests). The behavior of the members under reversed cyclic displacement is also simulated with advanced nonlinear Finite Element Analysis, with results that are correlated with the experimental observations. The SHFRCC specimen with minimum detailing showed improved performance and enormous ductility suggesting new possibilities to the seismic design of
structures.
Related References:
Eurocode 8:3 (2005). Design of structures for earthquake resistance. CEN.
ABAQUS (2011). Abaqus/CAE, SIMULIA, p. 1–16.
Eurocode 8:1 (2004). Design of structures for earthquake resistance—Part 1: general rules, seismic actions and rules for buildings. CEN.
FIB Model Code. (2010). Model Code 2010. Federation Internationale du Beton (fib).
Fischer, G., & Li, V. C. (2003). Deformation Behavior of Fiber-Reinforced Polymer Reinforced ECC Flexural Members under Reversed Cyclic Loading Conditions. ACI Struc. Jour.,
100(1), 25–35.
Fischer, G., & Li, V. C. (2007). Effect of fiber reinforcement on the response of structural members. Engineering Fracture Mechanics, 74(1–2), 258–272.
Georgiou, A., & Pantazopoulou, S. (2018). Performance of SHFRCC-RC concrete members under cyclic displacement reversals. In 16th Euro. Conf. on Earthq. Engin. Thessaloniki.
Georgiou, A. V., & Pantazopoulou, S. J. (2016). Effect of fiber length and surface characteristics on the mechanical properties of cementitious composites. Construction and Building Materials, 125, 1216-1228.
Georgiou, A. V., & Pantazopoulou, S. J. (2017). Behavior of Strain Hardening Cementitious Composites in Flexure/Shear. J. Mater. Civ. Eng. doi: 10.1061/(ASCE)MT.1943-5533.0002041
Georgiou, A. V., & Pantazopoulou, S. J. (2018). Experimental investigation on the confining effect of fibers in SHFRCC. Comp. Struc. 202, 29-37.
Kanta, T., Watanabe, S., & Li, V. C. (1998). Application of pseudo SHCC to shear resistant structural elements. In FRAMCOS-3 (pp. 1477–1490). Freiburg, Germany.
Kupfer, H., Hilsdorf, H., & Rusch, H. (1969). Behavior of Concrete Under Biaxial Stresses. Journal Proceedings, 66(8), 656–666.
Lee, J., & Fenves, G. L. (1998). Plastic-damage model for cyclic loading of concrete structures. Journal of Engineering Mechanics, 124(8), 892–900.
Lequesne, R., Parra-Montesinos, G., & Wight, J. (2016). Seismic Response of Fiber-Reinforced Concrete Coupled Walls. ACI Structural Journal, 113(3), 435–445.
Lubliner, J. J., Oliver, S., & Onate, E. (1989). A plastic-damage model for concrete. International Journal of Solids and Structures, 25(3), 229–326.
Parra-Montesinos, G., & Chompreda, P. (2006). Deformation capacity and shear strength of fiber reinforced cement composite flexural members subjected to displacement reversals.
Journal of Structural Engineering, 133(3), 421–431.
Yuan, F., Pan, J., Dong, L., & Leung, C. K. Y. (2014). Mechanical Behaviors of Steel Reinforced ECC or ECC / Concrete Composite Beams under Reversed Cyclic Loading. J.
Mat. in Civ. Eng., 26(8), 1–8. doi: 10.1061/(ASCE)MT.1943-5533.0000935
Yuan, F., & Pan, J. L. (2013). Experimental study on flexural behaviors of engineered cementitious composite beams reinforced with FRP bars. In 8th Intern. Conf. on fracture mechanics of concrete and concrete structures, FraMCoS-8 (pp. 390–401). Toledo, Spain.
Zanganeh, M., & Pantazopoulou, S. J. (2001). Triaxial tests of Fiber-reinforced concrete. Journal of Materials in Civil Engineering, 15(October), 340–348.