Classification of inter-modular connections for stiffness and strength in sway corner-supported steel modular frames

Farajian, Mostafa; Sharafi, Pezhman; Eslamnia, Hadi; Kildashti, Kamyar; Bai, Yu

doi:10.1016/j.jcsr.2022.107458

Cited by 16 publications

(3 citation statements)

References 25 publications

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“…Moreover, the plastic hinge formation in the beams connected to the Column#1 increases the effective length factor, K, so that exacerbates the situation of the partially buckled column. The K-factors determining the effective length of columns in corner-supported steel modular buildings are investigated by Farajian et al [44][45][46], with consideration for both sway and non-sway frames. To explore the impact of the core wall on the collapse behavior of the MSB against corner module removal, the core wall system was installed in three zones (case no.…”

Section: Eight-story Structurementioning

confidence: 99%

Robustness of Corner-Supported Modular Steel Buildings with Core Walls

Hajirezaei,

Sharafi,

Kildashti

et al. 2024

Buildings

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This paper studies the dynamic response of corner-supported modular steel buildings with a core wall system, under progressive collapse scenarios, associated with corner module removals. Since using secondary systems such as concrete core in mid- to high-rise buildings is currently unavoidable, understanding their impact on load transfer between modules during collapse scenarios becomes essential. The designated four-, eight-, and twelve-story buildings were modelled using the macro-model-based finite element method in Abaqus. In addition, three different locations are considered for the concrete shear core within the building plan, leading to nine various case scenarios. Each vertical and horizontal inter-module connection was modelled by one axial and two shear springs with predefined nonlinear force-displacement behavior. The local and global buckling, which plays an essential role in the building’s stability, was considered to obtain accurate results. Finally, parametric studies on the building response were carried out, including the intra-module connection rigidity and inter-module connection stiffness. The results demonstrated that the core wall could maintain the robustness of a modular steel building through two mechanisms dependent on its location within the plan. In addition, preventing plastic hinges from forming in beams could be introduced as an anti-collapse mechanism in the corner module removal scenarios.

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Section: Eight-story Structurementioning

confidence: 99%

Robustness of Corner-Supported Modular Steel Buildings with Core Walls

Hajirezaei,

Sharafi,

Kildashti

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…Moreover, the plastic hinge formation in the beams connected to the column no.1 increase the effective length factor, K, so that exacerbates the situation of the partially buckled column. The Kfactors determining the effective length of columns in corner-supported steel modular buildings are investigated by Farajian et al [44][45][46], with consideration for both sway and non-sway frames.…”

Section: -Storeymentioning

confidence: 99%

Robustness of Corner-Supported Modular Steel Buildings with Core Walls

Hajirezaei,

Sharafi,

Kildashti

et al. 2024

Preprint

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This paper studies the dynamic response of corner supported modular steel buildings with a core wall system, under progressive collapse scenarios, associated with corner module removals. Since using secondary systems such as concrete core in mid- to high-rise buildings is currently una-voidable, understanding their impact on load transfer between modules during collapse scenarios becomes essential. The designated buildings with four-, eight- and twelve-story were modelled using the macro-model based finite element method in Abaqus. Also, three different locations are considered for the concrete shear core within the building plan, leading to nine various case scenarios. Each vertical and horizontal inter-module connection was modelled by one axial and two shear springs with predefined nonlinear force-displacement behaviour. The local and global buckling, which plays an essential role in the building's stability, was considered to obtain accurate results. Finally, parametric studies on the building response were carried out, including the intra-module connection rigidity and inter-module connection stiffness. The results demonstrated that the core wall could maintain the robustness of modular steel building through two mechanisms dependent on its location within the plan. Also, preventing plastic hinges from forming in beams could be introduced as an anti-collapse mechanism in the corner module removal scenarios

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“…Corfar and Tsavdaridis have reviewed and summarized numerous studies on nodes [9]. Farajian et al have further summarized a classification system for interconnected rotary stiffness and strength characteristics in the context of swing angle support modules [10].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristic and Parameter Analysis of a Modular Building with Suspended Floors

He¹,

Zhang²,

Shang³

2022

Buildings

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Over the past few years, modular buildings have become an important form of environmentally friendly architecture. Prefabricated construction methods have gained a lot of attention because they produce less construction waste and require less labor and water. However, the seismic performance of modular buildings needs to be improved. This paper proposes a prefabricated steel module with a suspended floor, which is based on a multi-tuned mass damped floor system. This paper also derives the form of a motion equation which is unified with the construction process of modular buildings, which can describe the change law of the mass, stiffness, and damping matrix of the structure in the processes of connecting the main structure with the suspended floor slab and of joining different floors. Since the performances of tuned mass damping devices are closely related to the dynamic characteristics of the structure, this paper uses ABAQUS for numerical analysis and mathematical induction (MI) to propose and verify a simplified method for calculating the lateral stiffness of the entire story from a single module’s lateral stiffness. Based on the principle of reducing the stiffness difference in the structure along different directions, a standard scheme of the horizontal extension of the module building is also specified. The results show that the simplified calculation method is reasonable and that the lateral stiffness of the structure increases linearly with the number of modules. Finally, the recommended values for the tuned frequency ratio and tuned damping ratio are given by investigating the dynamic response of the structure under Gaussian white noise excitation. The results show that the recommended tuning frequency ratio and damping ratio ranges in modular buildings are close to those for FIS buildings.

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Classification of inter-modular connections for stiffness and strength in sway corner-supported steel modular frames

Cited by 16 publications

References 25 publications

Robustness of Corner-Supported Modular Steel Buildings with Core Walls

Robustness of Corner-Supported Modular Steel Buildings with Core Walls

Robustness of Corner-Supported Modular Steel Buildings with Core Walls

Dynamic Characteristic and Parameter Analysis of a Modular Building with Suspended Floors

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