The influence of inter-module connections on the effective length of columns in multi-story modular steel frames

Farajian, Mostafa; Sharafi, Pezhman; Kildashti, Kamyar

doi:10.1016/j.jcsr.2020.106450

Cited by 28 publications

(7 citation statements)

References 36 publications

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“…For modular structures, joints and connections are essential for ensuring structural integrality. Meanwhile, many novel joints have also been developed [5][6][7][8][9][10][11][12][13][14]. However, the coverplate bolted joints are still widely employed in current constructions, as shown in Figure 5.…”

Section: Simplification Of the Joints Between Modulesmentioning

confidence: 99%

“…Since the modular components and the volumetric modules are designed and manufactured in standardised factories, they are commonly well guaranteed to withstand typical loads/actions, such as self-weights and various axial live loads. 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%

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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: Simplification Of the Joints Between Modulesmentioning

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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“…Aristizabal-Ochoa [13,14] comprehensively considered the flexibility of beam-column nodes and derived the method of taking the effective length factors of columns. Farajian [15] investigated the influence of the relative stiffness ratio of connection nodes and their types on effective length factors in modular assembled steel frames, and proposed the calculation method of effective length factors for modular frame columns Appl. Sci.…”

Section: Introductionmentioning

confidence: 99%

Study of Effective Length Factor of Frame–Core Wall Structure with Cross-Layer Columns

Yang

et al. 2023

Applied Sciences

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The aim of this study was to examine the effective length factor of frame–core wall structures with cross-layer columns, which are relevant for current high-rise building construction. Using the finite element method, improved inflection point method (D-value method), and GB50017-2017, the study investigated how the height and distribution of cross-layer columns affect the lateral stiffness ratio, natural vibration period, member internal force, maximum interlayer displacement angle, and effective length factor of the column in the frame–core wall structures. However, the force acting in the frame in the weak axis direction that is considered in GB50017-2017 does not reflect the actual mechanical behavior. Therefore, when determining the effective length factor of cross-layer columns, the interaction between the remaining frames’ sub-structure and cross-layer columns is considered and the effective length factor is modified accordingly. A simplified model of a 140 m frame–core wall structure was established for analysis, and it was assumed that rigid links connect the frame and core wall hinged at both ends. The results show that increasing the height and number of cross-layer columns decreased the lateral stiffness ratio of the structure, and increased the maximum interlayer displacement angle and natural vibration period. Furthermore, the effective length factor of the structure decreased with an increase in height and the number of cross-layer columns. The modified effective length factor agrees well with the results obtained by the finite element method. These findings provide a useful reference for calculating the load-carrying capacity of cross-layer columns in engineering.

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“…LRMs, made from heavy materials (metamaterials) coated with a soft layer in a stiff matrix [26] (usually concrete), have been employed as foundations and barriers to decrease the propagation of seismic waves into structures and to protect them against the harmful consequences of earthquakes. The benefits of such a foundation would be magnified in the case of different structures, such as liquid storage tanks as well as modular structures, in which their performance under seismic actions is still a big question [27,28]. Jia and Shi [29] investigated the effect of physical as well as geometrical properties of periodic foundation on the stop band.…”

Section: Introductionmentioning

confidence: 99%

Effect of MetaFoundation on the Seismic Responses of Liquid Storage Tanks

2022

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Cylindrical liquid storage tanks are vital lifeline structures, playing a critical role in industry and human life. Damages to these structures during previous earthquakes indicate their vulnerability against seismic events. A novel strategy to reduce the seismic demands in the structures is the use of metamaterials, being periodically placed in the foundation, called MetaFoundation (MF). The periodic configuration of metamaterials can create a stop band, leading to a decrease in wave propagation in the foundation. The aim of this paper is to study the effect of MF on the dynamic behaviour of liquid storage tanks. To that end, the governing equations of motion of the liquid storage tank equipped with MF are derived and solved in the time domain to obtain the time history of the responses under a set of ground motions. Then, the peak responses of tanks, mounted on MF, are compared with the corresponding responses in the fixed base condition. Besides, a parametric study is performed to assess the effect of the predominant frequency of earthquakes, the number of layers of metamaterials, the thickness of soft material, and the damping ratios of soft material on the performance of the MF. The obtained results indicate that the MF improves the dynamic behaviour of the squat tank, in which the mean ratio of responses using MF to the ones in the fixed base conditions equals 0.551 for impulsive displacement, overturning moment, and base shear.

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The influence of inter-module connections on the effective length of columns in multi-story modular steel frames

Cited by 28 publications

References 36 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

Study of Effective Length Factor of Frame–Core Wall Structure with Cross-Layer Columns

Effect of MetaFoundation on the Seismic Responses of Liquid Storage Tanks

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