Seismic performance of an existing low-rise RC building considering the addition of a new storey

Gunes, Baris; Çoşgun, Turgay; Sayın, Barış; Mangir, Atakan

doi:10.7764/rdlc.18.3.459

Cited by 7 publications

(4 citation statements)

References 18 publications

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“…It became consequently quite clear that buildings of regular shape perform better in high earthquake areas. Some of them are heavily damaged due to the presence of vertical irregularities in various forms in elevation or in plan of the structure (Das & Nau, 2003;Dutta and Das, 2002;Caruso, Bento & Castro, 2018;Gunes et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Seismic analysis of RC building frames with vertical mass and stiffness irregularities using adaptive pushover analysis

Benaied,

Hemsas,

Benanane

et al. 2023

RDLC

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Irregular multistory buildings constitute a large part of modern urban infrastructure due to architectural aesthetics and functional requirements. In contrast, their behavior during recent major earthquakes indicated that severe structural damage was observed due to non-uniform distributions of mass, stiffness and strength either in plan or in elevation. Notably, abrupt changes in these quantities between adjacent stories are always associated with changes in the structural system along the height of the building. The present study investigates the inelastic response of RC buildings with mass and stiffness irregularities subjected to earthquake action. Thus, the displacement-based adaptive pushover method is used. This latter is motivated by the application of a lateral displacement pattern obtained by combining different mode shapes and updated incrementally at each analysis step. For this purpose, a ten-story regular frame structure is chosen and modified by incorporating vertical irregularities in various forms in order to estimate and quantify essential parameters' responses. The results obtained are discussed under the following headings: base shear forces, roof displacement, inter-story drift and story-shear distribution. With respect to the vertical mass and stiffness irregularities, it was noticed that the seismic response is more significantly influenced by stiffness irregularities compared to mass irregularities, which were found to have a slight impact on the seismic behavior of the building. It is also established that the simple procedure allows the evaluation of design forces and displacements in a more rational manner, in accordance with the current state of knowledge and modern trends in building codes. The results conclude, however, that the irregular structure cannot meet the seismic design requirements and must be constructed to minimize seismic effects.

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Section: Introductionmentioning

confidence: 99%

Seismic analysis of RC building frames with vertical mass and stiffness irregularities using adaptive pushover analysis

Benaied,

Hemsas,

Benanane

et al. 2023

RDLC

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show abstract

“…For this purpose, reinforced concrete walls, which are the most important elements against earthquake effects, come to the fore in earthquake resistant building design because they affect the rigidity of the structure. For this reason, it is important to use reinforced concrete walls in buildings to be built in earthquake zones (Gunes et al 2020). Reinforced concrete shear walls affect the behavior of buildings to resist ground motion.…”

Section: Introductionmentioning

confidence: 99%

Analytical investigation of the measures to be taken against weak storey irregularities

Cansiz

2023

rdlc

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Due to the earthquakes that have occurred in recent years, heavy damage has occurred in many structures in the world. When the damages occurred after the earthquakes have been examined, it has been observed that the damage occurred frequently in certain structures. These structures are generally structures with different shear capacity due to different story heights. This type of damage is defined as weak-soft storey irregularity in earthquake codes. For this reason, the use of reinforced concrete walls is recommended in the earthquake codes that have been updated in recent years. In addition, it is recommended by many researchers to strengthen the structures with various cross-frames on the storey where weak storey occur in such structures. For this purpose, a pushover analysis of structures with various storey heights and storey numbers supported by various cross-frames has been carried out. For this purpose, seismic analysis of 60 reinforced concrete structures has been made with the Seismo-Build program. In this study, the effectiveness of cross frames used in buildings with reinforced concrete wall and weak storey irregularities has been investigated.

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“…As a result of this situation, nonlinear analysis procedures according to different seismic codes or guidelines are utilized to investigate the structural performances of the existing buildings in recent studies (Aksoylu et al;Masi et al;Vijay et al;2012). Especially, the essential component of these procedures is the pushover analysis technique in which a series of non-linear incremental static analyses which are performed to obtain the lateral deformation and damage situations of structural members (El-Betar, 2018;Gunes et al, 2019;Mazza, 2014;Zou & Chan, 2005).…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation and strengthening of reinforced concrete buildings

Erdem

Karal

2022

rdlc

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In view of the past earthquakes, it is stated that several structures are located in active seismic zones around the world. So, improvement of the earthquake performance levels of the existing buildings by using various strengthening methods has been the major interest in structural engineering. Non-linear analysis procedures that are defined in several seismic codes exhibit reliable results in the evaluation of seismic performances of existing buildings. In this study, seismic performances of three, five and eight storey existing and strengthened reinforced concrete buildings having the common floor plan, material and section properties of the structural members are investigated according to Turkish Building Earthquake Code-2018 and American Standard, ASCE. To obtain the earthquake performance results of reinforced concrete buildings, displacement demands of the buildings have been obtained and utilized in nonlinear analyses. SAP2000 structural analysis software is used in the solutions. The determined strengthening techniques are provided by adding concentric steel bracing members to existing reinforced concrete buildings and jacketing of the determined columns. As a result of non-linear analyses applied to the existing and strengthened buildings, damage situations of the structural members are determined, seismic performances of the buildings are evaluated according to both codes and the results are interpreted in the end.

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Seismic performance of an existing low-rise RC building considering the addition of a new storey

Cited by 7 publications

References 18 publications

Seismic analysis of RC building frames with vertical mass and stiffness irregularities using adaptive pushover analysis

Seismic analysis of RC building frames with vertical mass and stiffness irregularities using adaptive pushover analysis

Analytical investigation of the measures to be taken against weak storey irregularities

Performance evaluation and strengthening of reinforced concrete buildings

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