The Concrete Strength Variability as Source of Irregularity for RC Existing Buildings

2016 ◽  
pp. 149-158 ◽  
Author(s):  
Stefania Viti ◽  
Marco Tanganelli ◽  
Marco De Stefano
Keyword(s):  
Concrete Strength ◽  
Existing Buildings ◽  
Strength Variability

Concrete Strength Variability in Italian RC Buildings: Analysis of a Large DataBase of Core Tests

2014 ◽  
Vol 597 ◽  
pp. 283-290 ◽  
Author(s):  
Angelo Masi ◽  
Andrea Digrisolo ◽  
Giuseppe Santarsiero
Keyword(s):  
Large Scale ◽  
Seismic Vulnerability ◽  
Concrete Strength ◽  
Discrete Distributions ◽  
Existing Buildings ◽  
Large Database ◽  
Public Buildings ◽  
Rc Structures ◽  
Actual Strength ◽  
Strength Variability

The knowledge of the materials’ mechanical properties is a preliminary and important step in the seismic vulnerability assessment of existing buildings. In RC structures, the compressive strength of concrete can have a crucial role on the seismic performance and is usually difficult to estimate. Major seismic codes prescribe that concrete strength has to be determined essentially from in-situ and laboratory tests. In some cases such estimation can be complemented by default values in accordance to standards at the time of construction, therefore analysing the actual concrete properties typically found in RC existing buildings realized in different periods can make available useful data. To this end, in this paper attention has been addressed to public buildings, namely schools and hospitals. A large database made up of about 1500 test results on concrete cores extracted from about 300 RC public buildings located in Basilicata region (Italy), has been prepared and analysed. The relationships between the actual strength values (mean and dispersion) and the construction period of buildings have been studied. Theoretical distributions to approximate the discrete distributions of strength values in different construction periods have been determined, thus providing relevant data for the structural assessment of individual buildings and, especially, for large scale vulnerability evaluations.

Torsional effects due to concrete strength variability in existing buildings

2015 ◽  
Vol 8 (2) ◽  
pp. 379-399 ◽  
Author(s):  
M. De Stefano ◽  
M. Tanganelli ◽  
S. Viti
Keyword(s):  
Concrete Strength ◽  
Existing Buildings ◽  
Strength Variability

Structural Defects of Existing RC Buildings in Eskisehir Province

2011 ◽  
Vol 147 ◽  
pp. 145-148 ◽  
Author(s):  
A.Emre Cengiz ◽  
Yücel Güney ◽  
Onur Kaplan ◽  
Ahmet Topçu ◽  
Yunus Özçelikörs ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Strength ◽  
Steel Reinforcement ◽  
Structural Defects ◽  
Existing Buildings ◽  
Rc Buildings ◽  
Short Column ◽  
Adjacent Buildings ◽  
Long Span ◽  
Lateral Reinforcement

In this study, structural defects of existing 709 reinforced concrete (RC) buildings in Eskisehir Province were represented. Structural defects such as gaps between adjacent buildings, strong beam-weak column, mezzanine floor, short column, corner column, discontinuous frame, anchorage beams, long span, segregation, corrosion, inconvenient column/beam lateral reinforcement, low concrete strength and inconvenient steel reinforcement were determined in the study. It was determined that %35 of existing buildings have discontinuous frame, %16 of them have long span problem. It was also observed that nearly %40 of the buildings have no column/beam lateral reinforcement and %70 of them have inadequate gaps.

scholarly journals Discussion: Variation of concrete strength in existing buildings

1974 ◽  
Vol 26 (89) ◽  
pp. 239-240
Author(s):  
R. G. Drysdale ◽  
J. H. Bungey
Keyword(s):  
Concrete Strength ◽  
Existing Buildings

Combining the bi-objective approach and conditional coring for a reliable estimation of on-site concrete strength variability

2021 ◽  
Vol 54 (6) ◽  
Author(s):  
Zoubir-Mehdi Sbartaï ◽  
Maitham Alwash ◽  
Denys Breysse ◽  
Xavier Romão ◽  
Vincenza A. M. Luprano
Keyword(s):  
Concrete Strength ◽  
Reliable Estimation ◽  
Strength Variability

Assessment of Existing Concrete Buildings

2011 ◽  
Vol 488-489 ◽  
pp. 739-742
Author(s):  
Lucio Nobile ◽  
Mario Bonagura ◽  
Veronica Bartolomeo
Keyword(s):  
Mechanical Characteristics ◽  
Concrete Strength ◽  
Performance Estimation ◽  
Seismic Protection ◽  
Existing Buildings ◽  
Compression Tests ◽  
Concrete Buildings ◽  
Existing Structures ◽  
Core Samples ◽  
And Performance

Assessment of concrete strength in existing structures is a very fundamental task today, because the mechanical characteristics are strictly connected to seismic protection and performance estimation of the material. To this aim, several compression tests has been carried out on drilled core samples in conjunction with different NDT methods. The activity presented in the paper is still under development and is intended as a reference in the choice of the methods and correlations for structural survey of existing buildings.

Sign in / Sign up

Export Citation Format

Share Document