Comparison of near and far-fault ground motion effects on low and mid-rise masonry buildings

Bilgin, Hüseyin; Hysenlliu, Marjo

doi:10.1016/j.jobe.2020.101248

Cited by 27 publications

(19 citation statements)

References 28 publications

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“…The main reason for this is that the seismic response of a structure highly depends on the dynamic motion and, therefore, a set of analyses with different levels of intensities is needed. Furthermore, nonlinear dynamic analysis requires the selection and scaling of seismic input and definition of hysteretic models [42]. On the other hand, nonlinear static analysis, namely, pushover analysis, provides fundamental information about the seismic performance of buildings by simply pushing the structure with an incremental lateral load until collapse.…”

Section: Performance-based Approach As a Design/assessment Toolmentioning

confidence: 99%

Overview on the Nonlinear Static Procedures and Performance-Based Approach on Modern Unreinforced Masonry Buildings with Structural Irregularity

Aşıkoğlu¹,

Vasconcelos²,

Lourénço³

2021

Buildings

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Performance-based design plays a significant role in the structural and earthquake engineering community to ensure both safety and economic feasibility. Its application to masonry building design/assessment is limited and requires straightforward rules considering the characteristics of masonry behavior. Nonlinear static procedures mainly cover regular frame system structures, and their application to both regular and irregular masonry buildings require further investigation. The present paper addresses two major issues: (i) the definition of irregularity in masonry buildings, and (ii) the applicability of classical nonlinear static procedures to irregular masonry buildings. It is observed that the irregularity definition is not comprehensive and has different descriptions among the seismic codes as well as among researchers, particularly in the case of masonry buildings. The lack of global language may result in the misuse of the procedures, while adjustments may be essential due to irregularity effects. Therefore, irregularity indices given by different codes and research studies are discussed. Furthermore, an overview of nonlinear static procedures implemented within the framework of the performance-based approach and improvements proposed for its application in masonry buildings is presented.

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Section: Performance-based Approach As a Design/assessment Toolmentioning

confidence: 99%

Overview on the Nonlinear Static Procedures and Performance-Based Approach on Modern Unreinforced Masonry Buildings with Structural Irregularity

Aşıkoğlu¹,

Vasconcelos²,

Lourénço³

2021

Buildings

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“…Evaluating the earthquake damage potential of a masonry building may be a challenging task to achieve, considering how peculiar these structures are, necessitating advanced and computationally rigorous numerical models to have an accurate estimation of their dynamical behavior to seismic actions. Recent Albanian earthquakes (Durres 2019 Seismic sequences) caused irreparable damages to many masonry structures all over the country [1][2].…”

Section: Introductionmentioning

confidence: 99%

Influence of interventions on the seismic performance of URM buildings designed according to pre-modern codes

Shkodrani¹,

Bilgin²,

Hysenlliu³

2021

Res. Eng. Struct. Mater.

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After the earthquake, the inspection carried out by the authors in the region has provided relevant findings regarding the methods of construction, quality of the materials and the performance of structures. The dominant building types in the Albanian building stock comprise unreinforced masonry (URM) structures with load-bearing masonry walls. These units suffered the worst damage. Dynamic response of masonry is highly nonlinear, and generally shows high vulnerability to seismic loading. Moreover, many buildings of these type have undergone structural interventions like adding floors, or wall openings, especially in the first floors of the buildings, which are parallel to the main roads, because of great demand for shops and stores. This paper aims at making seismic performance assessment of the intervened buildings based on macro-element modeling approach. Due to its efficiency, this approach is becoming popular among the practitioners and field experts in this area and allows simulating the non-linear behavior of masonry buildings. This method is applied to two old masonry buildings from the Albanian construction practice that are representatives of mid-size residential buildings with and without interventions. It must be said that in Albania, masonry buildings have been built using templates all over the country, so both models with and without intervention are common. Capacity curves of the investigated buildings are derived to assess the most probable seismic response of the investigated housing construction in the region as well as to evaluate the seismic performance of the tested structures.

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“…These template buildings were designed in 1982 and constructed in different cities in our country according to old building code [2,3]. Furthermore, Albania has been evaluated as a region with relatively high seismic vulnerability [4,5,6]. Recently, On November 26, 2019, western part of Albania was hit by a 6.4 Mw earthquake with epicenter in Durrës, causing major loss in human and buildings [7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance Assessment of a Moment-Frame Reinforced Concrete Building Typology

Leti¹

2021

CEBEL

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This study covers the application of Static and Dynamic nonlinear analysis to an old moment-frame reinforced concrete building. The case study selected is a template one designed in 1982 without shear walls and built throughout Albanian region in the communism era using old standards (KTP 2-78). For the capacity calculation, Pushover analysis is performed using an inverse triangular load pattern. The demand calculation is conducted using Incremental Dynamic Analysis (IDA) as a method which provides the response behavior of the structure from the elastic range until collapse. For the dynamic analysis is used a set of 18 earthquakes with no marks of directivity. Limit states are defined for both Pushover and IDA based on the FEMA 356 guidelines. The mathematical model is prepared in the environment of Zeus-NL, a software developed especially for earthquake applications. The parameters defined for the IDA analysis are 5% damped first mode spectral acceleration (Sa(T1,5%)) for the intensity measure (IM) and maximum global drift ratio (ϴmax) for the damage measure (DM). In addition, limit states are selected for the pushover curve as Immediate Occupancy (IO), Life Safety (LS) and Collapse Prevention (CP). Similarly, for the IDA curve the limit states are selected as IO, CP and Global Instability (GI) based on FEMA guidelines. Furthermore, IDA curves are summarized into 16%, 50% and 84% fractiles as suggested in the literature. Additionally, a comparison between Pushover and IDA median (50% fractile) is shown from the same graph to illustrate the correlations between performance levels. Finally, structural performance is interpreted based on the outcomes.

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Comparison of near and far-fault ground motion effects on low and mid-rise masonry buildings

Cited by 27 publications

References 28 publications

Overview on the Nonlinear Static Procedures and Performance-Based Approach on Modern Unreinforced Masonry Buildings with Structural Irregularity

Overview on the Nonlinear Static Procedures and Performance-Based Approach on Modern Unreinforced Masonry Buildings with Structural Irregularity

Influence of interventions on the seismic performance of URM buildings designed according to pre-modern codes

Seismic Performance Assessment of a Moment-Frame Reinforced Concrete Building Typology

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