Behavior of interior RC wide and conventional beam-column roof joints under cyclic load

Mirzabagheri, Sara; Tasnimi, Abbas Ali; Mohammadi, Masoud

doi:10.1016/j.engstruct.2015.12.011

Cited by 19 publications

(8 citation statements)

References 14 publications

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“…They concluded that the shear strength of the wide beamcolumn connection was sufficient unlike the conventional one. Furthermore energy dissipation was equal for both samples [16].…”

Section: Introductionmentioning

confidence: 92%

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Behavior of reinforced concrete interior wide beam-column connections under lateral loading: A finite element study

Etemadi¹,

Fallahnezhad²

2017

IJET

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Abstract-A Finite Element model was developed to quantitatively investigate the effect of the geometric parameters on the behavior of the RC wide beam-column connection. This model, with a high accuracy, was verified by the experimental test conducted by previous researcher. Force-displacement curves were produced for wide beam-column connections with different geometric parameters. The impact of the geometry of the wide beam on the mechanical properties, types and patterns of the cracks, length of the Plastic hinge through the steel reinforcements and plastic dissipation energy of the joint was investigated. Length of the plastic hinge was computed for all samples and it was understood that increasing the width and height of the beam caused the plastic hinge length to be reduced. For instance by 67 percent increase of the width of the beam, the plastic hinge length was decreased by 6.5 percent. Stress analysis of the FE model showed that tensile stress through the beam axis, compressive stress through the column axis and shear stresses are responsible for initiation of flexural cracks through the beams, narrow flexural cracks though the column and Inclined cracks, respectively. Increasing of the beam width had different influences on resistance of the structure against different types of the cracks. Changing the dimension of the beam, in wide beam-column connections, had a significant impact on the plastic dissipation energy capacity of the structure. For a determined value of the lateral force, structures with the shorter beam width had higher values of the plastic dissipation energy.

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“…They concluded that the shear strength of the wide beamcolumn connection was sufficient unlike the conventional one. Furthermore energy dissipation was equal for both samples [16].…”

Section: Introductionmentioning

confidence: 92%

“…Results showed that both wide and conventional beam joints had, generally, similar seismic capacities. An experimental test was conducted to compare the behavior of the two conventional and wide beam-column roof joint [16]. They concluded that the shear strength of the wide beamcolumn connection was sufficient unlike the conventional one.…”

Section: Introductionmentioning

confidence: 99%

Behavior of reinforced concrete interior wide beam-column connections under lateral loading: A finite element study

Etemadi¹,

Fallahnezhad²

2017

IJET

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“…Based on the literature review, however, it is important to state that exterior connections can suffer from severe issues such as torsional cracking and joint failure when not properly detailed (see Section 2). Moreso, only beam-column assemblies corresponding to ground floor or intermediate stories are considered in this analysis, although tests on roof-level connections exist [41].…”

Section: Yield Drifts Of Wide Beam-column Assemblies Based On Experim...mentioning

confidence: 99%

Seismic Performance of Reinforced Concrete Buildings with Joist and Wide-Beam Floors during the 26 November 2019 Albania Earthquake

2023

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Beams with width greater than their depth and depth equal to the depth of the slab (concealed wide beams) are widespread in Reinforced Concrete (RC) buildings in Albania. A large number of RC buildings with wide beams were hit by a strong Mw6.4 earthquake on 26 November 2019. The earthquake hit two of the most densely populated areas in Albania and caused widespread damage to these buildings. This paper aims to provide an updated view on the seismic performance of buildings with wide beams in light of the new field data following the 26 November 2019 Albania earthquake. To this end, a thorough literature review including experimental and field observations from past earthquakes is presented and data from field visits in Albania are described. It was found that damage to the joists and wide beams themselves was limited, even when the buildings suffered significant non-structural or structural damage in other elements as a result of the earthquake. A discussion on the behavior of wide beam–column frames based on nonlinear structural analyses and tests from the literature is presented. Furthermore, the implications of the results of the analysis for the seismic performance of RC buildings are discussed and confronted with observations from the 2019 Albania earthquake. Based on the literature review, further experimental research on wide beams with longer and more realistic span lengths is recommended.

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“…For the progressive collapse tests, three specimens designated as P-RC6, P-RD1, and P-ND are investigated. A commonly used 1/2-scale ratio reported in many published literature 14,25,[30][31][32] is adopted for all the specimens. It should be noted that the experimental results of the control specimens S-RC6, S-RD1, P-RC6, and P-RD1 have been presented in Lin et al 17 As this study is focused on the performance of the specimens (ie, S-ND and P-ND) with the newly proposed detailing, detailed and relevant experimental observations of these specimens can be referred to Lin et al 17…”

Section: Experimental Setup and Specimensmentioning

confidence: 99%

A novel structural detailing for the improvement of seismic and progressive collapse performances of RC frames

Lin

et al. 2019

Earthq Engng Struct Dyn

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Summary Earthquake‐induced building collapse and progressive collapse due to accidental local failure of vertical components are the two most common failure modes of reinforced concrete (RC) frame structures. Conventional design methods usually focus on the design requirements of a specific hazard but neglect the interactions between different designs. For example, the progressive collapse design of an RC frame often yields increased reinforcement and flexural strength of the beams. As a result, the seismic design principle of “strong‐column‐weak‐beam” may be violated, which may lead to unfavorable failure modes and weaken the seismic performance. To avoid these adverse effects of the progressive collapse design on the seismic resistance of RC frames, a novel structural detailing is proposed in this study. The proposed detailing technique intends to concurrently improve the seismic and progressive collapse performances of an RC frame by changing the layout of the newly added longitudinal reinforcement against progressive collapse without introducing any additional reinforcement. A six‐story RC frame is used as the prototype building for this investigation. Both cyclic and progressive collapse tests are conducted to validate the performance of the proposed structural detailing. Based on the experimental results, detailed finite element (FE) models of the RC frame with different reinforcement layouts are established. The seismic and progressive collapse resistances of different models are compared based on the incremental dynamic analysis (IDA) and nonlinear dynamic alternate path (AP) methods, respectively. The results indicate that the proposed structural detailing can effectively resolve the conflict between the seismic and progressive collapse designs.

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Behavior of interior RC wide and conventional beam-column roof joints under cyclic load

Cited by 19 publications

References 14 publications

Behavior of reinforced concrete interior wide beam-column connections under lateral loading: A finite element study

Behavior of reinforced concrete interior wide beam-column connections under lateral loading: A finite element study

Seismic Performance of Reinforced Concrete Buildings with Joist and Wide-Beam Floors during the 26 November 2019 Albania Earthquake

A novel structural detailing for the improvement of seismic and progressive collapse performances of RC frames

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