Ενισχύσεις δομικών στοιχείων οπλισμένου σκυροδέματος
The existence of structures designed with older codes that don’t cover new seismic requirements, makes the need for intervention to strengthen or repair them for safety reasons with advanced composites extremely urgent (Fardis et al., 2007, Bournas et al., 2009, Mirmiran et al. 1997, Rousakis et al....
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Democritus University of Thrace (DUTH)
2022
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Online Access: | http://hdl.handle.net/10442/hedi/52223 https://doi.org/10.12681/eadd/52223 |
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fthedi:oai:10442/52223 2024-06-23T07:56:35+00:00 Ενισχύσεις δομικών στοιχείων οπλισμένου σκυροδέματος Strengthening of reinforced concrete structural elements Tsakiris, Stefanos Τσακίρης, Στέφανος 2022 http://hdl.handle.net/10442/hedi/52223 https://doi.org/10.12681/eadd/52223 gre gre Democritus University of Thrace (DUTH) Δημοκρίτειο Πανεπιστήμιο Θράκης (ΔΠΘ) doi:10.12681/eadd/52223 http://hdl.handle.net/10442/hedi/52223 Οπλισμένο σκυρόδεμα Σύνθετα υλικά με ενίσχυση ινών άνθρακα Ενίσχυση έναντι σεισμού Reinforced concrete CFRP Seismic strengthening Επιστήμη Πολιτικού Μηχανικού Επιστήμες Μηχανικού και Τεχνολογία Δομοστατική Civil Engineering Engineering and Technology Structural Engineering PhD Thesis 2022 fthedi https://doi.org/10.12681/eadd/52223 2024-06-04T14:34:50Z The existence of structures designed with older codes that don’t cover new seismic requirements, makes the need for intervention to strengthen or repair them for safety reasons with advanced composites extremely urgent (Fardis et al., 2007, Bournas et al., 2009, Mirmiran et al. 1997, Rousakis et al., 2004, Sami et al., 2010). This paper deals with the experimental investigation of the behavior of reinforced concrete columns, which have been constructed according to older concrete codes and are strengthened in flexure andshear with FRP ropes and FRP sheets and the columns are subjected to combined axial and lateral pseudo-seismic load. The tests included four large scale specimens with two different cross sections 450mm x 200mm and 300mm x 300mm and height of 2000mm for both. The two columns had lap splices of the longitudinal reinforcement (540mm according to Greek Concrete Structures Code 1954) and the remaining two had no lap splices. The concrete was of quality C16/20 and the steel S500. The The tests took place in RC Lab of DUTH. After the initial testing, all the columns were repaired with mortar patch and were strengthened in flexure with NSM FRP ropes (cords). In addition, FRP unidirectional sheets provided the required shear strengthening and confinement (~30% increase). The specimens were subjected to cycles of increased lateral displacement of the free end (displacement at 1500 mm height) with a hydraulic dynamic actuator. Axial loads of the superstructure were simulated by the application of an axial fixed force of 400KN by a hydraulic actuator. LVDTs and special wire meters were used to get the measurements of the displacements at various spots (up to 350mm from the base) Η ύπαρξη πολλών κατασκευών που σχεδιάστηκαν με παλαιότερους κανονισμούς που δεν καλύπτουν τις σύγχρονες απαιτήσεις αντισεισμικότητας, καθιστά προφανή την ανάγκηεπέμβασης για ενίσχυση ή επισκευή τους για λόγους ασφαλείας με προηγμένα σύνθετα υλικά.(Fardis et al. 2007, Bournas et al. 2009, Mirmiran et al. 1997, Rousakis et al. 2004, ... Doctoral or Postdoctoral Thesis sami National Archive of PhD Theses (National Documentation Centre Greece) |
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Open Polar |
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National Archive of PhD Theses (National Documentation Centre Greece) |
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fthedi |
language |
Greek |
topic |
Οπλισμένο σκυρόδεμα Σύνθετα υλικά με ενίσχυση ινών άνθρακα Ενίσχυση έναντι σεισμού Reinforced concrete CFRP Seismic strengthening Επιστήμη Πολιτικού Μηχανικού Επιστήμες Μηχανικού και Τεχνολογία Δομοστατική Civil Engineering Engineering and Technology Structural Engineering |
spellingShingle |
Οπλισμένο σκυρόδεμα Σύνθετα υλικά με ενίσχυση ινών άνθρακα Ενίσχυση έναντι σεισμού Reinforced concrete CFRP Seismic strengthening Επιστήμη Πολιτικού Μηχανικού Επιστήμες Μηχανικού και Τεχνολογία Δομοστατική Civil Engineering Engineering and Technology Structural Engineering Tsakiris, Stefanos Τσακίρης, Στέφανος Ενισχύσεις δομικών στοιχείων οπλισμένου σκυροδέματος |
topic_facet |
Οπλισμένο σκυρόδεμα Σύνθετα υλικά με ενίσχυση ινών άνθρακα Ενίσχυση έναντι σεισμού Reinforced concrete CFRP Seismic strengthening Επιστήμη Πολιτικού Μηχανικού Επιστήμες Μηχανικού και Τεχνολογία Δομοστατική Civil Engineering Engineering and Technology Structural Engineering |
description |
The existence of structures designed with older codes that don’t cover new seismic requirements, makes the need for intervention to strengthen or repair them for safety reasons with advanced composites extremely urgent (Fardis et al., 2007, Bournas et al., 2009, Mirmiran et al. 1997, Rousakis et al., 2004, Sami et al., 2010). This paper deals with the experimental investigation of the behavior of reinforced concrete columns, which have been constructed according to older concrete codes and are strengthened in flexure andshear with FRP ropes and FRP sheets and the columns are subjected to combined axial and lateral pseudo-seismic load. The tests included four large scale specimens with two different cross sections 450mm x 200mm and 300mm x 300mm and height of 2000mm for both. The two columns had lap splices of the longitudinal reinforcement (540mm according to Greek Concrete Structures Code 1954) and the remaining two had no lap splices. The concrete was of quality C16/20 and the steel S500. The The tests took place in RC Lab of DUTH. After the initial testing, all the columns were repaired with mortar patch and were strengthened in flexure with NSM FRP ropes (cords). In addition, FRP unidirectional sheets provided the required shear strengthening and confinement (~30% increase). The specimens were subjected to cycles of increased lateral displacement of the free end (displacement at 1500 mm height) with a hydraulic dynamic actuator. Axial loads of the superstructure were simulated by the application of an axial fixed force of 400KN by a hydraulic actuator. LVDTs and special wire meters were used to get the measurements of the displacements at various spots (up to 350mm from the base) Η ύπαρξη πολλών κατασκευών που σχεδιάστηκαν με παλαιότερους κανονισμούς που δεν καλύπτουν τις σύγχρονες απαιτήσεις αντισεισμικότητας, καθιστά προφανή την ανάγκηεπέμβασης για ενίσχυση ή επισκευή τους για λόγους ασφαλείας με προηγμένα σύνθετα υλικά.(Fardis et al. 2007, Bournas et al. 2009, Mirmiran et al. 1997, Rousakis et al. 2004, ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Tsakiris, Stefanos Τσακίρης, Στέφανος |
author_facet |
Tsakiris, Stefanos Τσακίρης, Στέφανος |
author_sort |
Tsakiris, Stefanos |
title |
Ενισχύσεις δομικών στοιχείων οπλισμένου σκυροδέματος |
title_short |
Ενισχύσεις δομικών στοιχείων οπλισμένου σκυροδέματος |
title_full |
Ενισχύσεις δομικών στοιχείων οπλισμένου σκυροδέματος |
title_fullStr |
Ενισχύσεις δομικών στοιχείων οπλισμένου σκυροδέματος |
title_full_unstemmed |
Ενισχύσεις δομικών στοιχείων οπλισμένου σκυροδέματος |
title_sort |
ενισχύσεις δομικών στοιχείων οπλισμένου σκυροδέματος |
publisher |
Democritus University of Thrace (DUTH) |
publishDate |
2022 |
url |
http://hdl.handle.net/10442/hedi/52223 https://doi.org/10.12681/eadd/52223 |
genre |
sami |
genre_facet |
sami |
op_relation |
doi:10.12681/eadd/52223 http://hdl.handle.net/10442/hedi/52223 |
op_doi |
https://doi.org/10.12681/eadd/52223 |
_version_ |
1802649800257044480 |