Vulnerability assessment and collapse simulation of unreinforced masonry structures subjected to sequential ground motions

Shen, Jiaxu; Zhang, Yongqun

doi:10.1007/s10518-022-01509-6

Cited by 12 publications

(3 citation statements)

References 52 publications

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“…22,23 Using more advanced damage measures, such as those capable of combining both displacement-and energy-based measures 24 Reinhorn and Valles 25 ; Chung et al 26 ; Remki et al 27 , in place of simple displacement-based ones seems a legitimate and more practical solution. [28][29][30] Among other damage measures, several studies showed the better performance of Park and Ang damage index 24 for assessing cumulative damage in URM buildings [31][32][33] in comparison with displacement-based damage measures. These damage indices, however, were originally developed for frame structures or RC members, and therefore, as is their application for URM buildings is questionable.…”

Section: Introductionmentioning

confidence: 99%

Damage assessment of unreinforced masonry buildings incorporating damage accumulation

Inarritu,

Kohrangi,

Bazzurro

2024

Earthq Engng Struct Dyn

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Recent earthquakes have shown susceptibility of unreinforced masonry (URM) buildings to damage accumulation in seismic sequences or long duration ground motions. Current structural modelling approaches commonly disregard the damage accumulation in URM buildings or they are unable to accurately capture this phenomenon unless sophisticated FEM models are employed. Such models are not feasible in risk‐based applications given the required large number of dynamic analyses needed to develop robust fragility and vulnerability curves. On the other hand, the common displacement‐based engineering demand parameters (EDP), such as inter‐story drift ratio, fail to capture the impact of damage accumulation in simpler, more manageable models. An alternative is to use advanced damage indices that are capable of monitoring the monotonic accumulation of damages. This study proposes a displacement‐ and energy‐based damage index that uses, as the basis, the Park and Ang damage index, modified and calibrated through experimental data of individual URM elements. Our calibration procedure maps the physical observed damage states to the hysteretic response of the elements. Consequently, damage on the individual elements is aggregated to define a global damage state at building level. Validation is carried out based on an equivalent frame model of a building tested on a shake table. Additionally, the model is subjected to multiple ground motions of seismic sequences and to long‐duration ground motions to evaluate the performance of the proposed damage index. In comparison with displacement‐based damage measures, the proposed damage index shows a superior ability to capture cumulative damage, even when simplified models are employed.

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Section: Introductionmentioning

confidence: 99%

Damage assessment of unreinforced masonry buildings incorporating damage accumulation

Inarritu,

Kohrangi,

Bazzurro

2024

Earthq Engng Struct Dyn

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“…Such approaches are very popular in civil and earthquake engineering research, and they have been used by many researchers [20][21][22][23][24][25][26]. Moreover, the recent advances in uncertainties regarding the sensitivity analysis of global structural parameters (especially for masonry structures) can be accessed in [27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

The Sensitivity of Global Structural Parameters for Unreinforced Masonry Buildings Subjected to Simulated Ground Motions

et al. 2023

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This research performs a parametric study based on Equivalent Single Degree of Freedom (ESDOF) models for simplified seismic analysis of unreinforced masonry (URM) structures. This is a necessary action due to the fact that it is not affordable to model and analyze populations of masonry buildings by using detailed continuum-based models during regional seismic damage and loss estimation studies. Hence, this study focuses on the sensitivity of major structural parameters of a selected idealized hysteretic model for URM buildings. The numerical models are subjected to region-specific simulated ground motion time histories generated using validated seismological parameters. The variations in dynamic analysis results are evaluated using statistical tools for major structural and seismological parameters. The results reveal that the strength factor is the most influential structural parameter, whereas magnitude and distance have a significant impact on the response of idealized URM models as seismological parameters. Furthermore, the specific seismic performance exhibiting limited ductility capacity and the narrow margin of safety between the initial state of inelastic behavior and the ultimate (collapse) state for URM buildings is verified by the statistical approaches employed in this study.

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“…Figure 16. Macro continuum model-based analyses: (a) tensile damage for a perforated URM shear wall[170], (b) crack pattern for a confined URM shear wall[183], (c) damage distribution for a largescale URM shear wall[169], (d) damage distributions of a URM building under sequential ground motions (the plots from to left to right are corresponding to the cases: end of the mainshock, aftershock at 20.75 s, aftershock at 22.50 s, and aftershock at 24.25 s)[187].…”

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confidence: 99%

Towards Performance-Based Design of Masonry Buildings: Literature Review

Zeng,

2023

Buildings

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Masonry is among the most widely used construction materials around the world. Contemporary masonry buildings are primarily designed to comply with prescriptive building code regulations. In recent decades, performance-based design (PBD) has gained increasing attention and achieved significant success in critical structures or infrastructure systems. Instead of being the first mover, the masonry research and practice community can be a faster follower in response to the design paradigm shift towards PBD for masonry buildings. A reliable performance assessment of masonry buildings is of paramount importance in the PBD framework. To facilitate this, this paper presents an up-to-date comprehensive literature review of experimental and analytical studies with emphasis on their contributions to advancement towards performance assessment of masonry buildings. This review categorized available works into two sub-topics: (1) traditional unreinforced masonry and (2) modern reinforced masonry. In each sub-topic, studies focusing on the structural behaviors of masonry at the component-level (i.e., masonry wall) are discussed first, followed by the building system-level-related studies. Through this literature review, the current state of the art and remaining research gaps are identified to provide guidance for future research needs and to pave the way for implementing PBD in the masonry industry.

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Vulnerability assessment and collapse simulation of unreinforced masonry structures subjected to sequential ground motions

Cited by 12 publications

References 52 publications

Damage assessment of unreinforced masonry buildings incorporating damage accumulation

Damage assessment of unreinforced masonry buildings incorporating damage accumulation

The Sensitivity of Global Structural Parameters for Unreinforced Masonry Buildings Subjected to Simulated Ground Motions

Towards Performance-Based Design of Masonry Buildings: Literature Review

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