Abstract
Four-point bending tests were conducted up to failure on eleven reinforced concrete (RC) beams and strengthening beams to study the effectiveness of externally pouring ultra high toughness cementitious composites (UHTCC) on improving the flexural behavior of existing RC beams. The strengthening materials included UHTCC and high strength grade concrete. The parameters, such as thickness and length of strengthening layer and reinforcement in post-poured layer, were analyzed. The flexural behavior, failure mode and crack propagation of composite beams were investigated. The test results show that the strengthening layer improves the cracking and ultimate load by increasing the cross section area. Introducing UHTCC material into strengthening not only improves the bearing capacity of the original specimens, but also disperses larger cracks in upper concrete into multiple tightly-spaced fine cracks, thus prolonging the appearance of harm surface cracks and increasing the durability of existing structures. Compared with post-poured concrete, UHTCC is more suitable for working together with reinforcement. The load-deflection plots obtained from three-dimensional finite-element model (FEM) analyses are compared with those obtained from the experimental results, and show close correlation.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
LI V C, LEUNG C K Y. Theory of steady state and multiple cracking of random discontinuous fiber reinforced brittle matrix composites [J]. Journal of Engineering Mechanics, 1992, 118(11): 2246–2264.
LI V C, WANG S, WU C. Tensile strain hardening behavior of polyvinyl alcohol engineered cementitious composites (PVA-ECC) [J]. ACI Mater J, 2001, 98(6): 483–492.
LI V C. On engineered cementitious composites (ECC)—A review of the material and its applications [J]. J Adv Concr Technol, 2003, 1(3): 215–230.
XU Shi-lang, ZHANG Xiu-fang. Theoretical analysis and experimental investigation on flexural performance of steel reinforced ultrahigh toughness cementitious composite (RUHTCC) beams [J]. Science in China Series E: Technological Sciences, 2009, 52(4): 1068–1089.
XU Shi-lang, LI He-dong. A review on the development of research and application of ultra high toughness cementitious composites [J]. China Civil Engineering Journal, 2008, 41(6): 72–87. (in Chinese)
XU Shi-lang, CAI Xin-hua, Li He-dong. Experimental study of the durability properties of ultra-high toughness cementitious composites under freezing and thawing cycles [J]. China Civil Engineering Journal, 2009, 42(9): 42–46. (in Chinese)
SHAIKH F U A, HIROZO M. A review on durability properties of strain hardening fiber reinforced cementitious composites [J]. Cement & Concrete Composites, 2007. 29(5): 365–376.
LEPECH M D, LI V C. Water permeability of cracked cementitious composites [C]// Compendium of Papers, ICF 11, Turin, Italy, 2005. CD-ROM.
KIM Y Y, FISCHER G, LI V C. Performance of Bridge Deck Link Slabs Designed with Ductile ECC [J]. ACI Structural J, 2004, 101(6): 792–801.
KOJIMA S, SAKAT N, KANDA T, HIRAISHI T. Application of direct sprayed ecc for retrofitting dam structure surface-application for Mitaka-Dam [J]. Concrete Journal, 2004, 42(5): 135–139.
KUNIEDA M, ROKUGO K. Recent progress on HPFRCC in Japan—Required performance and applications [J]. J Advanced Concrete Technology, 2006, 4(1): 19–33.
LI He-dong. Experimental research on ultra high toughness cementitious composites [D]. Dalian: Dalian University of Technology, 2008. (in Chinese)
ISENBERG J. Finite element analysis of reinforced concrete structures II: Proceedings of the international workshop [M]. New York: ASCE, 1993: 1–35.
WANG Xu-cheng. Finite element method [M]. Beijing: Tsinghua University Press, 2003: 545–660. (in Chinese)
HIBBITT, KARLSSON, SORENSON, INC. ABAQUS/Standard User’s Manual [M]. Pawtucket: Hibbitt, Karlsson, Sorenson, Inc, 2002.
ABAQUS Inc. Abaqus Analysis User’s Manual [M]. Volume V. Providence: ABAQUS Inc, 2007.
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: Project(50438010) supported by the National Natural Science Foundation of China
Rights and permissions
About this article
Cite this article
Wang, N., Xu, Sl. Flexural response of reinforced concrete beams strengthened with post-poured ultra high toughness cementitious composites layer. J. Cent. South Univ. Technol. 18, 932–939 (2011). https://doi.org/10.1007/s11771-011-0783-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-011-0783-6