An Experimental Evaluation of Structural Performance for the Beam to Column Joints in Unit Modular System

Lee, Sang Sup; Bae, Kyu Woong; Park, Keum Sung; Hong, Sung Yub

doi:10.7781/kjoss.2013.25.3.255

Cited by 14 publications

(3 citation statements)

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“…The procedure for determining the bending capacity of each joint was identical to that reported previously [17,28,31,32]. The developed joints were found to have a significantly higher lateral load-carrying capacity and seismic response than previously proposed joints [41,42]. According to previous research, semi-rigid frames with a drift ratio greater than 0.032 rad were found appropriate for use in earthquake-prone zones [43].…”

Section: Discussionmentioning

confidence: 59%

Simplified Modelling of Novel Non-Welded Joints for Modular Steel Buildings

2021

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Prefabricated modular steel (PFMS) construction is a more efficient and safe method of constructing a high-quality building with less waste material and labour dependency than traditional steel construction. It is indeed critical to have a precise and valuable intermodular joining system that allows for efficient load transfer, safe handling, and optimal use of modular units' strength. Thus, the purpose of this study was to develop joints using tension bolts and solid tenons welded into the gusset plate (GP). These joints ensured rigid and secure connectivity in both horizontal and vertical directions for the modular units. Using the three-dimensional (3D) finite element (FE) analysis software ABAQUS, the study investigated the nonlinear lateral structural performance of the joint and two-storey modular steel building (MSB). The solid element FE models of joints were then simplified by introducing connectors and beam elements to enhance computational efficiency. Numerous parameters indicated that column tenons were important in determining the joint's structural performance. Moreover, with a standard deviation (SD) of 0.025, the developed connectors and beam element models accurately predicted the structural behaviour of the joints. As a result of their simplification, these joints demonstrated effective load distribution, seismic performance, and ductility while reducing computational time, effort, and complexity. The validity of the FE analysis was then determined by comparing the results to the thirteen joint bending tests performed in the reference.

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Section: Discussionmentioning

confidence: 59%

Simplified Modelling of Novel Non-Welded Joints for Modular Steel Buildings

2021

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“…7. The lateral load-carrying capacity showed by the joints was found comparatively better Along shorter direction of MSB Along longer direction of MSB than the joints proposed earlier [40,41]. According to the previous work done on the beam-column joints, joints with a plastic rotation angle greater than 0.032 rad were considered suitable and recommended in strong seismic zones [42].…”

Section: Discussionmentioning

confidence: 93%

Numerical Studies on the Seismic Behaviour of a Prefabricated Multi-Storey Modular Steel Building With New-Type Bolted Joints

2021

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Prefabricated modular steel (PFMS) construction is an industrial technique of construction that enhances productivity, site safety, and construction quality. The assembling of prefabricated buildings needs an accurate connecting system to ensure structural integrity and effective transfer of loads and moments. Therefore, in the current study, a new-type bolted joints having a long tenon-gusset plate for horizontally, and long beam bolts for vertically connecting modular units have been developed. Nonlinear static analysis was carried out by the finite element (FE) analysis software ABAQUS. The bending performance of the joints with varying parameters and modular units with different forces scenario, was studied. To analyse the seismic performance of modular steel building (MSB), a simplification of the detailed joint with the connector was performed. Then the seismic response of full-scale four-storey simplified MSB was studied by dynamic analysis. The results revealed that joints possessed stable load-carrying capacity with adequate ductility and seismic performance. The simultaneous application of axial, lateral tension, and compression forces affected ultimate capacity, initial stiffness, and ductility of single modules more than the double modules. Moreover, the simplified model accurately mimicked the bending behaviour of joints with a fluctuation of < 4% in capacities. Inter-storey drift ratios (IDR) of both the shorter and longer directions of MSB were found lower than the code limits of 2.5%. Hence, the static analysis on joints and modular units, and dynamic analysis on MSB authenticated the effectiveness of developed joints to resist and distribute the lateral loads. Finally, the accuracy of FE analysis was verified by analysing twelve bending tests on joints listed in the references.

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“…In conventional modular systems, rectangular tubes or channels are generally used for the columns, and channels are used for beam members [4,5]. However, in current systems, although the specifications of connections between units can vary depending on the scope of the module interior and exterior, as well as the construction error [5], modular units are generally connected using bolts [6][7][8][9], interlocking devices [10][11][12], and steel plate welding [13].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Structural Performance of a Novel Methodology for Connecting Modular Units Using Straight and Cross-Shaped Connector Plates in Modular Buildings

et al. 2020

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The strength capacity of modular buildings is determined by the weakest part, and connections between modular units are often weaker than the modular units themselves. Thus, to verify the safety of modular structures, the structural performance of connections between modular units should be evaluated; the practical suitability of connection methods under a range of construction conditions should also be determined. In conventional modular building structures, modular units are generally connected using bolts between connector plates, interlocking devices, or steel plate welding. However, current methods are not technically or practically suitable for all types of modular buildings, such as high-rise modular buildings. Here, we describe a novel technology for connecting modular units to ensure the safety of modular structures. In this study, straight and cross-shaped metal connectors that use rectangular tubular columns and channel beams were proposed for connecting modules. Their structural performance was evaluated through cyclic loading tests by controlling the story drift angle in the width and longitudinal directions. The experimental results demonstrated that all specimens exhibited relatively stable behavior up to a drift angle of 0.04 rad, and there was a superior response in terms of energy absorption capability in the longitudinal direction results compared to the width direction. However, in comparison to the cross-shaped connector plate, the stiffness of the straight connector plate decreased as the drift angle of the column increased.

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An Experimental Evaluation of Structural Performance for the Beam to Column Joints in Unit Modular System

Cited by 14 publications

References 0 publications

Simplified Modelling of Novel Non-Welded Joints for Modular Steel Buildings

Simplified Modelling of Novel Non-Welded Joints for Modular Steel Buildings

Numerical Studies on the Seismic Behaviour of a Prefabricated Multi-Storey Modular Steel Building With New-Type Bolted Joints

Evaluation of the Structural Performance of a Novel Methodology for Connecting Modular Units Using Straight and Cross-Shaped Connector Plates in Modular Buildings

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