Doctoral Thesis

Design of Indirect FRP Reinforcement

Final Thesis 13.51 MB Summary of Thesis 1.77 MB

Author of thesis: Ing. Juraj Lagiň, Ph.D.

Acad. year: 2023/2024

Supervisor: prof. RNDr. Ing. Petr Štěpánek, CSc., dr. h. c.

Reviewers: Ing. Petr Bilý, prof. Ing. Jaroslav Halvoník, Ph.D.

Abstract:

The thesis deals with the issue of indirect, or also bended, Fiber Reinforced Polymer (FRP) reinforcements. The objective of the study is the development of the subject reinforcement and the establishment of a foundation for further research in this field. The current understanding of the addressed problem is only superficially explored. Therefore, the work expands knowledge not only at the national but also at the international level. The solution focuses on processing theoretical and practical insights, extending understanding at the microscopic (structural) level. It defines a testing method and, in the experimental section, analyses the impact of individual parameters on the overall short-term tensile load-bearing capacity of the indirect FRP reinforcement. Regarding long-term strength, attention is directed towards the reinforcement's ability to withstand alkaline environments, a crucial factor for design durability. The utilization of the reinforcement within concrete elements, specifically in the form of stirrups load by shear forces, is also described. The paper outlines the design approaches for reinforcement, considering both domestic and foreign methodologies, highlighting differences and relationships, and comparing them with experimentally tested elements. In the conclusion of the work, a modification to currently applicable design equations for shear reinforcement in concrete elements using FRP reinforcement is proposed.

Keywords:

FRP reinforcement, indirect FRP reinforcement, bent FRP reinforcement, shear resistance of elements using FRP reinforcement

Date of defence

21.10.2024

Result of the defence

Defended (thesis was successfully defended)

znamkaPznamka

Language of thesis

Slovak

Faculty

Department

Institute of Concrete and Masonry Structures

Study programme

Civil Engineering (D-K-C-SI (N))

Field of study

Constructions and Traffic Structures (KDS)

Reviewer’s report
Ing. Petr Bilý

File inserted by the reviewer Size
Posudek oponenta [.pdf] 186,25 kB

File inserted by the reviewer Size
Posudek oponenta [.pdf] 304,35 kB

Responsibility: Mgr. et Mgr. Hana Odstrčilová