Bartosz Piątek

Rzeszów University of Technology · Department of Roads & Bridges

Distributed Fiber Optic Sensing (DFOS) is a measurement technology that has experienced dynamic development in recent years and is increasingly used in various industries, including construction. By embedding sensors during the manufacturing stage of prestressed concrete elements, significant insights can be gained into their behavior during concre...

The effect of surfactants and water-cement ratio on abrasion resistance of hydraulic concrete are presented. A series of laboratory tests and field surveys of hydraulic structures were carried out to determine the effect of various factors on wear resistance of hydraulic concrete to abrasive effects. Studies were carried out by comparison of labora...

p>The paper presents the smart FRP deck system, called Optideck, which was developed as a sandwich panel in which the core is ribbed by a vertical laminates forming a honeycomb structure. The panel is equipped with distributed fibre optic sensors for structural health monitoring. The sensors are built into the panel during the infusion process and...

p>Wind energy is the second most popular renewable energy source (RES) in the world after solar energy. The most important problem of using wind energy is the recycling of turbine rotor blades, which are made of FRP composites. Thanks to their shape and mechanical parameters wind turbine blades can be used in construction industry i.e. as bridge gi...

This paper investigates the flexural behavior of preloaded reinforced concrete (RC) beams, strengthened with Carbon Fiber Reinforced Polymer (CFRP) plates using an experimental program, analytical procedure, and Finite Element Method (FEM) simulation. The RC beams were subjected to preloads of 30%, 50% and 70% of the yielding load, prior to install...

Streszczenie: Drogowe obiekty inżynierskie należy projektować zgodnie z systemem norm PN-EN od sierpnia 2019 roku, natomiast kolejowe od czerwca 2014 roku. Wraz z implementacją tych przepisów pojawiły się pytania i wątpliwości związane z wykorzystaniem ich w praktyce. W artykule przedstawiono niektóre problemy i niejasności wynikające z zapisów akt...

The paper presents the research on reinforced concrete (RC) beams strengthened with carbon fibre reinforced polymer (CFRP) strips with various configurations in terms of anchoring and tensioning. The five full-scale RC beams with the total length of 6.0 m were strengthened with passive strips, without and with mechanical anchorages at their ends, a...

The paper presents the results of the research on a series of reinforced concrete beams strengthened with the new Polish CFRP post-tensioning system with various prestressing levels (force). The tests included four RC beams with a rectangular cross-section of 0.50 m × 0.42 m and a length of 6.0 m. The first beam was a reference (control) beam. The...

The prestressed unidirectional carbon fibre reinforced polymer (CFRP) strips are currently often used for flexural strengthening of concrete structures. To ensure reliable strengthening, strips have to be anchored at their ends to the surface. However, anchoring of unidirectional CFRP strips is difficult because of their weak transversal mechanical...

The paper presents recent Polish experience of applications of strengthening bridges using prestressed CFRP strips. Within the framework of the domestic R&D project the new CFRP prestressing system has been developed at RUT in cooperation with Tines Composites, Poland. The system relies on patented steel anchors (CFRP plate end is simultaneously bo...

Combination of lightweight concrete (LWC) and glass fibre reinforced polymer (GFRP) rebars offers synergy of advantages of both materials and leads to more durable, less-weight and cheaper in terms of life cycle costs of bridges. This synergy was a motivation to start of the R&D project on the combination of both materials for bridge structural ele...

External prestressing with CFRP strips is currently a well-developed and widely used technique to strengthen reinforced concrete structures subjected to bending. This paper presents the development and experimental investigation of a novel anchor and tensioning system for the flexural strengthening of RC elements with prestressed CFRP strips. The r...

CFRP (carbon fiber reinforced polymer) strips are currently often used to strengthen reinforced concrete structures in flexure. In order to ensure effective strengthening, proper connection between FRP material and concrete structure is needed. CFRP strips can be applied passively (only by bonding to the concrete surface) or actively (by prestressi...

The paper presents development, testing and on-site implementation of a new CFRP (Carbon Fibre Reinforced Polymer) post-tensioning system for flexural strengthening. Main elements of the system include the tensioning device and steel anchorages mounted on both ends of a single CFRP strip. Development of the system itself and the results of a system...

Prestressing of reinforced concrete structures with CFRP strips is highly effective and currently developing method of strengthening. Mechanical anchorages are usually used in this technology in order to introduce and permanently maintain prestressing force in the CFRP strips. The paper presents the results of static tests of CFRP strips anchorages...

The paper presents a research on the new Polish CFRP strengthening system called Neoxe Prestressing System II. The research included development of two main system components: special steel anchorages mounted on both ends of a single CFRP strip and a tensioning device. The research comprised series of static and fatigue tests carried out on anchora...

Artykuł przedstawia badania nad nową generacją polskiego systemu wzmacniania konstrukcji betonowych naprężanymi taśmami kompozytowymi Neoxe Prestressing System II (NPS II). W skład systemu wchodzi odcinek taśmy kompozytowej z obustronnymi zakotwieniami montowanymi w zakładzie prefabrykacji, urządzenie naciągowe oraz klej do połączenia taśmy z powie...

CFRP strips are commonly used for post-strengthening of various structures including bridges. In the recent years prestressed strips have been phased in due to their better effectiveness and durability as compared to non-prestressed strips. Several tensioning-anchoring kits have been developed to implement the prestressed CFRP strips technology. Th...

The paper presents a research on the new Polish CFRP prestressing system for strengthening of reinforced concrete structures. The system is called Neoxe Prestressing System II (NPS II). NPS II consists of two main elements: a special steel anchorages mounted on both ends of a single CFRP strip and a tensioning device. The anchorage is made of two s...

The poster presents a research on the new Polish system called Neoxe Prestressing System II. The system consists of two main elements: a special steel anchorages mounted on both ends of a single CFRP strip and a tensioning device. There are two kinds of anchorages: an active anchorage combining with a tensioning device and a passive one. The anchor...

Taśmy kompozytowe są obecnie szeroko wykorzystywane w budownictwie. Dzięki bardzo dobrym parametrom mechanicznym doskonale nadają się do wzmacniania konstrukcji żelbetowych. Wzmacnianie może odbywać się w sposób bierny, gdzie taśmy są wyłącznie przyklejane do powierzchni betonu lub czynny, w którym taśmy są przyklejane w stanie naprężonym i najczęś...

Wzmacnianie konstrukcji żelbetowych przy pomocy sprężanych taśm z włókien węglowych jest technologią wciąż innowacyjną i rozwijaną. Pomimo wielu przeprowadzonych prac badawczych, dzięki którym powstało już kilka systemów wzmacniania, nie wszystkie aspekty pracy wzmocnionych elementów zostały do końca poznane, a każdy system posiada swoje indywidual...

Taśmy kompozytowe są coraz częściej stosowane do wzmacniania istniejących konstrukcji, w tym mostów. Do tej pory opracowano wiele systemów wstępnego naprężania taśm, a niektóre z nich doczekały się już praktycznych aplikacji. Newralgicznym elementem systemów wzmacniania są z reguły zakotwienia taśm CFRP. W pracy przedstawiono wyniki badań zakotwień...

The paper presents the results of research on static and fatigue behaviour of mechanical anchorages used to fasten CFRP strips in the new pre-tensioning system Neoxe Prestressing System II (NPS II). The anchorages use the combination of friction, bonding and rivet clamping in one CFRP-steel joint. The aim of static test was to check the efficiency...

The use of CFRP prestressed strips in strengthening work have gone through a big development during the past 10 years. The bending strength and stiffness of both concrete and steel beams can be considerably enhanced with this technique. The main problem of strengthening with prestressed strips has been the anchor zones. Without mechanical anchorage...

Materiały kompozytowe CFRP ze względu na swoje znakomite parametry mechaniczne są coraz szerzej wykorzystywane w budownictwie. W ostatnich kilkunastu latach obserwuje się m.in. coraz większe wykorzystanie kompozytów FRP (taśm, mat, kształtek, itp.) do wzmacniania różnego rodzaju konstrukcji budowlanych. Dotychczasowe badania jednoznacznie wykazują...

The CFRP composite materials due to their excellent mechanical properties are more often used in civil engineering. In recent more than ten years has been observed e.g. much wider application of CFRP strips in structural strengthening. The research on this subject clearly showed the advantages of prestressed strips application in contrast to passiv...

The CFRP composite materials due to their excellent mechanical properties are more often used in civil engineering. In recent more than ten years has been observed e.g. much wider application of CFRP strips in structural strengthening. The research on this subject clearly showed the advantages of prestressed strips application in contrast to passiv...