Key influence parameters for the joint shear behaviour of reinforced concrete (RC) beam–column connections

Kim, Jae Hong; LaFave, James M.

doi:10.1016/j.engstruct.2006.12.012

Cited by 149 publications

(68 citation statements)

References 4 publications

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“…Kim and LaFave [30] constructed an extensive database of RC beam-column joint test specimens having at least a minimum amount of joint transverse reinforcement. Influence parameters for joint shear stress and/or strain behaviour at identified key points (displaying the most distinct stiffness changes) were assessed and the strength values were compared with ACI recommendations.…”

Section: Critical Review Of Existing Shear Strength Modelsmentioning

confidence: 99%

A new model to simulate joint shear behavior of poorly detailed beam–column connections in RC structures under seismic loads, Part I: Exterior joints

Sharma

Eligehausen

Reddy

2011

Engineering Structures

105

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Section: Critical Review Of Existing Shear Strength Modelsmentioning

confidence: 99%

A new model to simulate joint shear behavior of poorly detailed beam–column connections in RC structures under seismic loads, Part I: Exterior joints

Sharma

Eligehausen

Reddy

2011

Engineering Structures

105

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“…68.8 kNm, 58 kNm for specimen IL; and 38.9 kNm, 29 kNm for specimen IU. Second, the post-tensioning compressive force applied to the columns may have assisted the behaviour of the joints, as suggested by Paulay (1989), although counter-evidence exists that questions the existence of this beneficial effect (Kim and LaFave 2007). Besides the aforementioned references, many other studies focus on the seismic behaviour of the beam-column joint (Paulay and Park 1984;Ichinose 1991;Vollum and Newman 1999;Bakir and Boduroglu 2006;Bakir 2003;Vollum and Parker 2008).…”

Section: Overall Performancementioning

confidence: 95%

Interior wide beam-column connections in existing RC frames subjected to lateral earthquake loading

Benavent‐Climent

Cahís

Vico

2009

Bull Earthquake Eng

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The seismic performance of two RC interior wide beam-column connections representative of existing frames designed and detailed according to past construction practices in the moderate-seismicity Mediterranean area was investigated experimentally. The specimens were subjected to axial loads, moderate levels of gravity loading and cyclic displacements up to failure. The specimens exhibited a "strong column-weak beam" type of flexural yielding mechanism. The wide beams did not reach the expected capacities corresponding to the formation of a full-width plastic hinge. The wide-beam longitudinal bars exhibited significant slippage, and the transverse beams underwent severe torsion cracking and even failure; this caused severe pinching in the load versus displacement hysteretic loops and exacerbated the intrinsic flexibility of this type of connection. The average drift ratios at first yielding of the wide beam longitudinal reinforcement and at failure were 2.7 and 4.5%, respectively. The displacement ductility ratio was about 2.8. The ultimate energy dissipation capacity of each specimen-obtained by dividing the total plastic strain energy by the product of the yield load and yield displacement-was approximately 9, which is about one fourth of the value recommended for providing adequate seismic performance. Finally, a simple approach is suggested for prediction of the bending capacity of existing connections.

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“…The main disagreement between codes of practice is attributed to the adopted joint resistance mechanism, resulting from a general confusion about the influence of design variables on joint performance, such as joint dimensions, bond resistance, column axial load, joint shear reinforcement, column to beam flexural strength ratio, slab effects, and transverse beams [5]. Kim and LaFave [6] constructed a large experimental database from the available technical literature in order to clarify important issues about the parameters influencing the behaviour of RC joints, where points in the response with distinct stiffness changes were assessed. Further, the most important parameters were found to be related to connection type and failure mode sequence.…”

Section: Introductionmentioning

confidence: 99%

Modelling exterior beam–column joints for seismic analysis of RC frame structures

Favvata

Izzuddin

Karayannis

2008

Earthq Engng Struct Dyn

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SUMMARYIn common practice, the local response of beam-column joints is not considered for the seismic analysis of multistorey reinforced concrete (RC) frame structures, where these critical regions are typically assumed as rigid. Studies that incorporate the local effect of the joints in the seismic analysis of multistorey RC frame structures are limited. Identifying the main disadvantages of the analytical models that have been proposed so far, a behavioural model is developed for the simulation of the local inelastic response of exterior RC beam-column joints in multistorey RC frame structure. Special attention is given to the description of the main characteristics of the actual seismic response of the joints, including strength and stiffness degradation. The proposed model is incorporated as a rotational spring element in a general program for nonlinear static and dynamic analysis of structures, and a procedure for the evaluation of the required model parameters is also presented. The effectiveness of the proposed joint element model is demonstrated through comparisons with experimental data of 12 RC exterior joints reported in the literature. Moreover, using the proposed element, the influence of the local nonlinear response of RC exterior beam-column joints on the ductility requirements of columns and on the failure mode and overall seismic response of a multistorey RC frame structure is investigated. From the results of these analyses, it is concluded that the modelling of exterior RC joints with reduced capacity as rigid joints can lead to unconservative results and therefore to unsafe design.

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Key influence parameters for the joint shear behaviour of reinforced concrete (RC) beam–column connections

Cited by 149 publications

References 4 publications

A new model to simulate joint shear behavior of poorly detailed beam–column connections in RC structures under seismic loads, Part I: Exterior joints

A new model to simulate joint shear behavior of poorly detailed beam–column connections in RC structures under seismic loads, Part I: Exterior joints

Interior wide beam-column connections in existing RC frames subjected to lateral earthquake loading

Modelling exterior beam–column joints for seismic analysis of RC frame structures

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