• The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Numerical Simulation of AFRP Rod NSM RC Beams under Falling-weight Impact Loading

Author(s): Masato Komuro, Yusuke Kurihashi, Tomoki Kawarai and Norimitsu Kishi

Publication: Symposium Paper

Volume: 327


Appears on pages(s): 17.1-17.14

Keywords: RC beam; impact load; strengthening method, FRP rod; near-surface mounting (NSM) method, FE analysis; equivalent tensile fracture energy

DOI: 10.14359/51713338

Date: 11/1/2018

In order to establish a numerical analysis method to provide an improved estimate of the dynamic response characteristics of reinforced concrete (RC) beams strengthened with near-surface mounted (NSM) Aramid FRP (AFRP) rods under impact loading, a method using fictitious tensile strength of the concrete elements based on an equivalent tensile fracture energy concept (Gf) was proposed. Applying this concept for the concrete elements, an elasto-plastic dynamic response analysis of the RC beams under impact loading was carried out using a fine mesh for a more accurate evaluation of the crack patterns and for a more realistic consideration of the strengthening effects of AFRP rods. The applicability of the method was investigated comparing with the experimental results. Here, configurations of the time histories of the impact force, the reaction force, the mid-span deflection, and crack patterns occurred in the RC beams were used for this investigation. From this study, it was seen that the RC beams strengthened with NSM AFRP rods under falling-weight impact loading can be better simulated using fine meshes with fictitious tensile strength for concrete elements following proposed Gf concept. Here, the case of using a fine mesh having a length of about 6 mm gave appropriate results.