Effect of Pre-Damage on the Behavior of Axially and Eccentrically Compressed Concrete Cylinders Confined with PBO-FRCM
Maciej Pazdan, Tomasz Trapko, Michał Musiał
TL;DR
This study examines how pre-damage affects concrete cylinders strengthened with PBO-FRCM under axial and eccentric compression.
Contribution
The novelty lies in analyzing pre-damaged concrete elements confined with PBO-FRCM, a fire-resistant alternative to FRP composites.
Findings
Pre-damage did not negatively impact the load-bearing capacity of PBO-FRCM confined concrete.
Digital image correlation identified delamination in PBO mesh overlaps during testing.
PBO-FRCM confinement improved deformability and ductility even in pre-damaged concrete.
Abstract
In the case of strengthening building structures, the process usually involves elements that have a certain loading history and are typically subjected to loading during the strengthening process. In scientific research, on the other hand, strengthening is usually applied to elements that are not representative of real structures. This article presents a study of the effect of pre-damage on the behavior of eccentrically compressed concrete cylinders confined with PBO-FRCM (fabric-reinforced cementitious matrix with PBO fibers) composite. Concrete confinement introduces a favorable triaxial stress state, which leads to an increase in the compressive strength of concrete. FRCM systems are an alternative to FRP (fiber-reinforced polymer) composites. Replacing the polymer matrix with a mineral matrix primarily improves the fire resistance of the strengthening system. The elements were made…
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Taxonomy
TopicsStructural Behavior of Reinforced Concrete · Innovative concrete reinforcement materials · Structural Response to Dynamic Loads