Operational Modal Analysis, Testing and Modelling of Prefabricated Steel Modules with Different LSF Composite Walls

Rashidi, Maria; Sharafi, Pezhman; Alembagheri, Mohammad; Bigdeli, Ali; Samali, Bijan

doi:10.3390/ma13245816

Cited by 14 publications

(4 citation statements)

References 26 publications

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“…e key to ensuring structural integrity [5][6][7][8][9][10][11][12][13][14] becomes joints/connections, which attracts wide attention from engineers and researchers. Further, the performance of the assembled modular structures has also been mainly focused on the performance under seismic actions and some other transverse loads/actions [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

“…us, extensive investigations have been reported, providing a clear understanding of the behaviour of modular structures based on these three levels (i.e., single modular component and module level, the joint and connection level, and the assembled modular structural system level). Further, some of these studies [17,[29][30][31][32] indicate that the lateral stiffness can also be improved by employing some novel prefabricated shear wall members.…”

Section: Introductionmentioning

confidence: 99%

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Seismic Performance of Modular Structures with Novel Steel Frame: Light Gauge Slotted Steel Stud Walls

Gong

Sun

Chen

et al. 2022

Shock and Vibration

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Modular structures are premanufactured off-site and assembled on-site, leading to reduced on-site works and construction periods and improved quality compared to conventional prefabricated steel structures and reinforced concrete structures. Meanwhile, steel frame-light gauge slotted steel stud (LGSS) walls have been considered to be assembled into the modules due to their excellent thermal- and sound-insulation properties. These structural components will also contribute to the resistance of the modular system when subjected to lateral loads/actions, especially seismic actions. A finite element model was developed to investigate the seismic performance of high-rise modular steel structures with LGSS shear walls. Then, parametric studies were conducted to investigate the influences of the layouts of the LGSS shear walls and structure heights on the lateral stiffness, the deformation modes, and the stress states of the modular steel structures. Observed from the results of a ten-storey modular steel structure infilled with LGSS shear walls, the maximum storey drift reduced by 50.1–79.50% compared to the corresponding pure steel frame structure under the selected high-intensity seismic waves. The results indicate that the studied modular steel structure with LGSS shear walls possesses good seismic resistance and could be a practical and economical choice for future modular constructions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic Performance of Modular Structures with Novel Steel Frame: Light Gauge Slotted Steel Stud Walls

Gong

Sun

Chen

et al. 2022

Shock and Vibration

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“…LTH and NLTH damage analyses were performed. Rashidi et al [14] used the OMA method to evaluate the effects of different infill wall materials on the dynamic properties of modular steel units. Aloisio et al [15] studied the effect of strengthening on the structural dynamic characteristics of a masonry palace using the OMA method.…”

Section: Introductionmentioning

confidence: 99%

Seismic damage assessment of a historical masonry minaret considering soil-structure interaction

Altıok¹,

Demir²

2021

JSEAM

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Historical structures should be carefully preserved and transferred to the next generations. Therefore, their seismic performances should be investigated in detail. In the finite element method, many parameters affect the seismic behaviour and damage distribution in the structures. One of the most significant parameters is the Soil-Structure Interaction effect. In finite element analyses, the soil medium is generally neglected, and the structures' base is restrained by fixed supports. In this study, seismic response of a historical masonry minaret is investigated by considering the Soil-Structure Interaction and Operational Modal Analysis methods. To determine the effect of Soil-Structure Interaction on structural behaviour, the fixed supports, hard and soft soil mediums at the base of the structure are modelled. The material and failure behaviours are defined with the Concrete Damage Plasticity model. Displacements, principal stresses, damage rates, and damage distribution of models are obtained with nonlinear time history analyses. According to the results, the interstory drift increases due to the decrease in the stiffness of the soil media. In addition, the fixed supports model was damaged more tensile stress damage than the other models. The least occurred in the soft soil model. It is concluded that the Soil-Structure Interaction effect significantly affects structural behaviour, especially the damage rate and distribution.

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“…This will, in turn, provide robustness and prevent progressive collapse of the building due to potential local damages. [14,15] Design of interconnections for MSBs has attracted attentions in the past few years. [16][17][18][19][20] Yet, despite being widely acknowledged as a fundamental issue in the design of modular frames, studies on the effects of intramodule and intermodule connections on the overall response of MSBs specifically with regard to the overall stability, robustness, and progressive collapse are very limited.…”

Section: Introductionmentioning

confidence: 99%

Robustness of multistory corner‐supported modular steel frames against progressive collapse

Alembagheri

Sharafi

Tao

et al. 2021

Structural Design Tall Build

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In current practice, a relatively wide range of different interconnections and assembly systems is being used for the design of modular buildings made of volumetric prefabricated frames. The integration strategies and design criteria for providing structural robustness or prevention of disproportionate collapse for such buildings are completely different with those with conventional systems. This is mainly because of their fundamentally different configuration of joints and the redundancy they provide for the structure. This paper studies the robustness of multistory modular structures, made of prefabricated volumetric steel frames, against progressive collapse, which can be triggered by various column or module loss scenarios. In this study, the flexibility of modules and propagation of the damage inside the individual modules are taken into account, and the buckling of columns, as well as the effects of material nonlinearity on the responses and capacity of the entire system, are also considered.Load redistribution patterns and possible gravity-induced collapse mechanisms are inspected in various collapse scenarios for a typical mid-rise modular steel frame. In the numerical model, each individual prefabricated volumetric module is composed of discrete beam and column frame elements, connected through conventional rigid beam-column connections. The volumetric modular steel frames are connected via corner vertical and horizontal intermodule joints; each one is modeled utilizing one axial and two shear springs with predefined nonlinear force-displacement behavior in a 3D finite element analysis. The local damage scenarios are assumed to be due to instantaneous loss of columns or entire modules, for which the interactions between the modular units, overall structural robustness, load redistribution, possible collapse mechanisms, and progressive collapse response of the frames are investigated. The results indicate that the additional redundancy may help the modular steel frames survive from some corner column or single module removals but will not be able to maintain their robustness under combined module removal scenarios.

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Operational Modal Analysis, Testing and Modelling of Prefabricated Steel Modules with Different LSF Composite Walls

Cited by 14 publications

References 26 publications

Seismic Performance of Modular Structures with Novel Steel Frame: Light Gauge Slotted Steel Stud Walls

Seismic Performance of Modular Structures with Novel Steel Frame: Light Gauge Slotted Steel Stud Walls

Seismic damage assessment of a historical masonry minaret considering soil-structure interaction

Robustness of multistory corner‐supported modular steel frames against progressive collapse

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