Research on the Seismic Performance of RC Members of Existing, Modern and Strengthened RC Buildings

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Materials, and Repair & Renovation".

Deadline for manuscript submissions: closed (30 March 2024) | Viewed by 2366

Special Issue Editors


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Guest Editor
Division of Structural Engineering (D.S.E.), Aristotle University of Thessaloniki | AUTH, Thessaloniki, Greece
Interests: repair, pre-earthquake and post-earthquake retrofit of RC structures; seismic behavior of structural members of substandard modern and strengthened RC structures; innovative strengthening materials and schemes, FRPs, high strength and ultra high strength steel fiber-reinforced concrete (HSSFRC and UHSSFRC)

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Guest Editor
Division of Structural Engineering (D.S.E.), Aristotle University of Thessaloniki | AUTH, Thessaloniki, Greece
Interests: inelastic behaviour of reinforced concrete structures, structural design, fiber-reinforced concrete and especially ultra-high strength fiber-reinforced concrete; seismic repair and rehabilitation of reinforced concrete structures especially with new materials (FRPs) and the seismic repair and rehabilitation of monuments

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Guest Editor

Special Issue Information

Dear Colleagues,

The behavior of reinforced concrete (RC) structural members (columns, beams, beam-column joints, walls) during strong seismic excitations decisively affects the overall seismic performance of RC buildings. The existing substandard RC buildings are particularly susceptible to severe damaging and catastrophic collapses due to numerous critical structural deficiencies, related to poor reinforcement details, low quality of the materials used and lack of capacity design approach. However, recent experimental and analytical research found in the literature indicates that unexpected brittle failure of the structural members of modern RC buildings is also possible to occur, with severe detrimental effects on the structural integrity. The latter is also true for existing RC buildings which are retrofitted according to modern design codes to withstand strong future earthquakes. Thus, further investigation, both experimental and analytical, is required to improve the provisions of modern codes for the design of earthquake-resistant RC buildings and to provide well-documented solutions for the effective strengthening of RC members.

This Special Issue aims to provide a significant impetus in the understanding of the failure mechanisms developed in RC members during strong earthquakes and to propose solutions to prevent premature, brittle failures of RC members and particularly of the most vulnerable ones (short).

The topics covered are:

  • Experimental and analytical investigation of the seismic behavior of substandard, modern and retrofitted RC members;
  • Research of the effectiveness of retrofit schemes which include the use of innovative materials and techniques.

Dr. George Kalogeropoulos
Prof. Dr. Alexandros-Dimitrios Tsonos
Prof. Dr. Constantin Chalioris
Guest Editors

Manuscript Submission Information

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Keywords

  • experimental tests
  • analytical and numerical modeling
  • retrofit
  • innovative materials
  • steel fiber concrete
  • FRP
  • shear span ratio
  • reinforced concrete
  • seismic response
  • earthquake engineering
  • cyclic behavior
  • damage diagnosis, assessment and prevention
  • novel construction materials

Published Papers (2 papers)

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Research

22 pages, 6585 KiB  
Article
Structural Health Monitoring of Fiber-Reinforced Concrete Prisms with Polyolefin Macro-Fibers Using a Piezoelectric Materials Network under Various Load-Induced Stress
by Maria C. Naoum, Nikos A. Papadopoulos, Maristella E. Voutetaki and Constantin E. Chalioris
Buildings 2023, 13(10), 2465; https://doi.org/10.3390/buildings13102465 - 28 Sep 2023
Cited by 7 | Viewed by 765
Abstract
This experimental study investigates the influence of synthetic macro-fibers added in fiber-reinforced concrete (FRC) prismatic specimens on their flexural response and overall cracking performance. Application of a novel structural health monitoring (SHM) system that implements the electromechanical impedance (EMI) technique and the use [...] Read more.
This experimental study investigates the influence of synthetic macro-fibers added in fiber-reinforced concrete (FRC) prismatic specimens on their flexural response and overall cracking performance. Application of a novel structural health monitoring (SHM) system that implements the electromechanical impedance (EMI) technique and the use of piezoelectric lead zirconate titanate (PZT) transducers installed in the FRC prisms are also included. The applied PZT-enabled EMI-based monitoring system was developed to diagnose damage and the overall performance in reinforced concrete (RC) structural members subjected to cyclic repeated loading, simulating seismic excitations in existing RC buildings. The paper also aims to determine the sensitivity of the real-time, wireless, and portable monitoring technique corresponding to the location, the distance, the direction of polarization of the PZT transducers and the location and magnitude of damage due to flexural cracking. Further, the influence of the effect of stresses corresponding at various loading levels and the observed changes in the ΕΜΙ frequency response of the PZT transducers are also examined. Test results indicated that cracking detection is achieved using this SHM system by prompt damage level assessment due to the FRC’s flexural load at early seismic loading stages in existing RC buildings. Full article
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24 pages, 17194 KiB  
Article
Identification of Damage in Planar Multistory Reinforced Concrete Frames Developing a Beam-Sway Plastic Mechanism Using the “M and P” Technique
by Triantafyllos K. Makarios and Athanasios P. Bakalis
Buildings 2023, 13(9), 2316; https://doi.org/10.3390/buildings13092316 - 12 Sep 2023
Cited by 1 | Viewed by 1050
Abstract
The effectiveness of a recently proposed methodology for the identification of damage in planar, multistory, reinforced concrete (RC) moment frames, which develop a plastic yield mechanism on their beams, is showcased here via the examining of a group of such existing multistory frames [...] Read more.
The effectiveness of a recently proposed methodology for the identification of damage in planar, multistory, reinforced concrete (RC) moment frames, which develop a plastic yield mechanism on their beams, is showcased here via the examining of a group of such existing multistory frames with three or more unequal spans. According to the methodology, the diagram of the instantaneous eigenfrequencies of the frame in the nonlinear regime is drawn as a function of the inelastic seismic roof displacement by the performance of a sequence of pushover and instantaneous modal analyses with gradually increasing target displacement. Using this key diagram, the locations of severe seismic damage in an existing moment frame can be evaluated if the instantaneous fundamental eigenfrequency of the damaged frame, at an analysis step within the nonlinear area, is known in advance by “the monitoring and the identification of frequencies” using a local network of uniaxial accelerometers. This is a hybrid technique because both procedures, the instrumental monitoring of the structure and the pushover analysis on the frame (M and P technique), are combined. A ductile, five-story, planar RC moment frame with three unequal spans is evaluated in this paper by the M and P technique. The results show that the seismic roof displacement, the lateral stiffness matrix, and, finally, the damage image of this existing frame, are fully compatible with the eigenfrequencies identified by the monitoring and are calculated with high accuracy. Full article
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