Progressive Collapse Analysis of SRC Frame-RC Core Tube Hybrid Structure

Chen, Xingxing; Xie, Wei; Xiao, Yao; Chen, Yi-Guang; Xian-jie, LI

doi:10.3390/app8112316

Cited by 9 publications

(5 citation statements)

References 29 publications

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“…Remarkably, the FE method has been used in many existing studies to simulate the collapse behavior of buildings. For instance, a number of FE method-based studies have focused on the collapse resistance of structures before the formation of debris [21][22][23][24][25][26][27][28]. In contrast, studies on the collapse debris distribution are relatively limited, mainly due to the high computational cost of the FE simulations for such problems [20,29].…”

Section: Introductionmentioning

confidence: 99%

A preliminary analysis and discussion of the condominium building collapse in surfside, Florida, US, June 24, 2021

Guan

Sun

et al. 2021

Front. Struct. Civ. Eng.

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On June 24, 2021, a 40-year-old reinforced concrete flat plate structure building in Miami suffered a sudden partial collapse. This study analyzed the overall performance and key components of the collapsed building based on the building design codes (ACI-318 and GB 50010). Punching shear and post-punching performances of typical slab-column joints are also studied through the refined finite element analysis. The collapse process was simulated and visualized using a physics engine. By way of these analyses, weak design points of the collapsed building are highlighted. The differences between the reinforcement detailing of the collapsed building and the requirements of the current Chinese code are discussed, together with a comparison of the punching shear and post-punching performances. The simulated collapse procedure and debris distribution are compared with the actual collapse scenes.

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Section: Introductionmentioning

confidence: 99%

A preliminary analysis and discussion of the condominium building collapse in surfside, Florida, US, June 24, 2021

Guan

Sun

et al. 2021

Front. Struct. Civ. Eng.

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“…At the same time, the uneven settlement of the foundation and the seismic action caused the interstorey drift ratios to increase significantly, which led to damage of the corner column and its adjacent components. Although the direct damage caused in Zone I was localized, the possibility of progressive collapse of the entire structure cannot be ignored [26,27].…”

Section: Collapse Probability Analysismentioning

confidence: 99%

Seismic Vulnerability Analysis of Structure Subjected to Uneven Foundation Settlement

Bao

Chen

et al. 2019

Applied Sciences

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Uneven foundation settlement is one of the common engineering problems in a collapsible loess area. In order to study the influence of uneven foundation settlement on the seismic performance of a structure, the incremental dynamic analysis (IDA) method is used to analyze the seismic vulnerability of the steel structure frame. The differences in the seismic response of the structure in relation to uneven foundation settlement are analyzed. The influences of uneven foundation settlement quantities and various areas of uneven settlement on the seismic response of the structure are discussed. On this basis, the relationship between ground motion intensity and structural failure probability is studied, by changing the magnitude of seismic acceleration peaks. Compared with the unsettled structure, the internal force redistribution of the structure caused by uneven foundation settlement is one of the causes of earthquake damage for some components. The uneven foundation settlement located at the corner of the plane of the structure is likely to cause more serious earthquake damage to the structure. Uneven settlement will cause an increase in storey drift. With the increase in settlement, the seismic damage of the superstructure will be aggravated.

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“…Considering that tests in this regard are very time-consuming and costly, numerical simulation approaches are usually adopted to study the influences of different parameters on the performance against progressive collapse in detail [6,[13][14][15]. Generally, dynamic effects should be considered in the ALP method.…”

Section: Introductionmentioning

confidence: 99%

Performance Assessment of an Energy–Based Approximation Method for the Dynamic Capacity of RC Frames Subjected to Sudden Column Removal Scenarios

et al. 2021

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The alternative load path method is widely used to assess the progressive collapse performance of reinforced concrete structures. As an alternative to an accurate non–linear dynamic analysis, an energy–based method (EBM) can also be adopted to approximately calculate the dynamic load–bearing capacity curve or the dynamic resistance based on a static capacity curve. However, dynamic effects cannot be explicitly taken into account in the EBM. The model uncertainty associated with the use of the EBM for evaluating the dynamic ultimate capacity of structural frames has not yet been quantified. Knowledge of this model uncertainty is however necessary when applying EBM as part of reliability calculations, for example, in relation to structural robustness quantification. Hence, this article focuses on the evaluation of the performance of the EBM and the quantification of its model uncertainty in the context of reliability–based assessments of progressive or disproportionate collapse. The influences of damping effects and different column removal scenarios are investigated. As a result, it is found that damping effects have a limited influence on the performance of the EBM. In the case of an external column removal scenario, the performance of the EBM is lower as the response is not a single deformation mode according to the results in the frequency domain. However, a good performance is found in the case of an internal column removal scenario in which the assumption of a single deformation mode is found to be sufficiently adequate. Probabilistic models for the model uncertainties related to the use of the EBM compared to direct dynamic analyses are proposed in relation to both the resistances and the associated displacements. Overall, the EBM shows to be an adequate approximation, resulting in a small bias and small standard deviation for its associated model uncertainty.

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Progressive Collapse Analysis of SRC Frame-RC Core Tube Hybrid Structure

Cited by 9 publications

References 29 publications

A preliminary analysis and discussion of the condominium building collapse in surfside, Florida, US, June 24, 2021

A preliminary analysis and discussion of the condominium building collapse in surfside, Florida, US, June 24, 2021

Seismic Vulnerability Analysis of Structure Subjected to Uneven Foundation Settlement

Performance Assessment of an Energy–Based Approximation Method for the Dynamic Capacity of RC Frames Subjected to Sudden Column Removal Scenarios

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