Abstract
A modular steel structure building has obvious advantages in reducing construction period and protecting the environment due to its unique construction method, so it is widely used in modern construction. However, the modular building connection design and modeling are mostly based on the traditional connection research results. To address this issue, the paper developed a component-based model for novel modular connections with an inbuild component. First of all, the comprehensive parameter study was implemented using elaborate finite element models. Then the component-based model for novel modular connections was developed, and the force-deformation response of each component was determined using the finite element method. Thirdly, assembly of all components to overall rotational joint and the simplified finite element model of modular connections was obtained. Finally, comparison between simplified and refined finite element was conducted, the results showed that the proposed model can predict the mechanical behavior of modular building connections within the acceptable margin of error.
Highlights
Modular building can maximize the prefabrication of building factories and improve the efficiency of building construction
A state-of-the-art review conducted by Wahid Ferdous [3] pointed out that the development of multi-story modular buildings still faces the challenge of lack of design guidelines and reliable connection systems
The horizontal joint between modular units was considered as a bolted steel plate, and the elastic behavior was assumed by modeling the connection as an element with strength in bending and shear 30% greater than the adjacent beam section
Summary
Modular building can maximize the prefabrication of building factories and improve the efficiency of building construction. The mechanical properties were studies mainly based on the experiment and finite element method. The results of finite element modeling show that the upper and lower intramodule connection exhibit independent mechanical behavior. The horizontal joint between modular units was considered as a bolted steel plate, and the elastic behavior was assumed by modeling the connection as an element with strength in bending and shear 30% greater than the adjacent beam section. The component method that adopted in Eurocode 3 [14] and Eurocode 4 [15], known as mechanical model or spring model It describes the mechanical behavior of connections through a series of rigid and elastic elements. The finite element can accurately predict the mechanical properties of joints
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