Analytical study on new types of reduced beam section moment connections affecting cyclic behavior

Rahnavard, Rohola; Hassanipour, Akbar; Siahpolo, Navid

doi:10.1016/j.csse.2015.03.001

Cited by 55 publications

(15 citation statements)

References 6 publications

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“…The mechanical properties of materials were determined according to ASTM A370 [20] standard tensile tests [14] (Table 1). In many studies on connections [1,18,[21][22][23] the cyclic loading is based on the SAC [24] protocol; hence, in the present study, this protocol has been used [14]. The quasi-static cyclic load has been applied to the free-end of the beam by the displacement control method at a rate of 0.02 [16].…”

Section: Experimental Process 21 Test Specimensmentioning

confidence: 99%

Design Approach To Bolted End-Plate Vertical-Slits RWS Connection

Nazaralizadeh

Ronagh

Memarzadeh

et al. 2021

Preprint

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Extensive research has been carried out on steel moment frames to improve the cyclic performance of seismic resisting connections with reduced beam section (RBS). The RBS connections are conventionally known by the radial reduction of the beam flange. Where the contribution of the beam flange to the flexural resistance is greater than that of the beam web, some researchers have proposed reduced web section (RWS) connections, instead. The present study dedicates to the RWS connections with vertical-slits (VS), as a cost-effective alternative with multiple design parameters. This paper aims to obtain proper ranges for the geometric design parameters of the VS-RWS connection. In this order, two full-scale specimens of the bolted end-plate VS-RWS connection were experimentally tested under the SAC cyclic loading to evaluate the performance of connections, and then a parametric study was carried out using the verified numerical models. The parameters consist of the distance between the column face and the beginning of the reduced region, the length of the reduced region, as well as the depth and width of the vertical-slits. Based on the results, certain recommendations for the ranges of the geometric parameters of VS-RWS have been suggested. In order to obtain the story drift of the frame caused by the VS-RWS beam flexural deformation using the conjugate beam method, the original VS-RWS was replaced with an equivalent constant-cut reduced beam section (CC-RBS). At last, a simple design procedure for VS-RWS connections was provided according to AISC-358.

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Section: Experimental Process 21 Test Specimensmentioning

confidence: 99%

Design Approach To Bolted End-Plate Vertical-Slits RWS Connection

Nazaralizadeh

Ronagh

Memarzadeh

et al. 2021

Preprint

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“…Vulnerability of a section to rupture is calculated by Rupture Index (RI) as the ratio of the equivalent plastic strain index to the ductile fracture strain (Rahnavard et al 2015;Moradi and Alam, 2017). RI can be written as:…”

Section: R5: Rupture Index @ 75% Total Storey Driftmentioning

confidence: 99%

Effect of Different Design Parameters on the Cyclic Response of Reduced Beam Sections (RBS) Moment Connections

Naqvi¹

2021

Preprint

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After the 1994 Northridge earthquake, research has been conducted to develop new types of beamcolumn moment connections, such as Reduced Beam Section (RBS) connections. This study performs a sensitivity analysis of the cyclic response of RBS connections using detailed finite element simulation. The significance of the effect of twenty-one factors is assessed using a statistical design of experiment method. The input factors are related to the material properties or the geometry of the beam-column connection. A two-level fractional factorial design is used to create factor combinations for the sensitivity analysis. The cyclic response of RBS connections is assessed in terms of five response variables, including: the total dissipated energy, initial stiffness, strength degradation rate, maximum moment capacity and rupture index at 7.5% storey drift. The sensitivity analysis results show that the beam depth has the greatest influence on the cyclic response of RBS connections.

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“…Reduced Beam Section (RBS) merupakan sebuah metode pengurangan luasan sayap dari penampang balok dengan jarak tertentu dari tumpuan, sehingga memaksa sendi plastis agar terjadi pada bagian RBS yang berada jauh dari kolom [5]. Sambungan tanpa menggunakan RBS memiliki performa yang kurang baik dibanding sambungan menggunakan RBS.…”

Section: Reduced Beam Section (Rbs)unclassified

Studi Perilaku Pada Sambungan Rectangular Concrete Filled Tubes (Rcft) Dengan Metode Finite Element

Casita¹,

Suswanto²

2018

Journal of Civil Engineering

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This research presents the result of two rectangular filled tube column-to-beam connections under cyclic loading using finite element analysis. Connections of all two models were using weld connection and shear tab attached to beam webs. In this study, 2 models were made: RR-1 and RB-2, which are RCFT connection with RBS and RCFT connection without RBS. This study is conducted to learn, the advantages of RCFT connection with RBS against RCFT connection without RBS. The analysis results observed that cyclic performance of the RBS moment connection was much superior to the connection without RBS. The highest regions of stress occur in vicinity of beam bottom flange near column face for connection without RBS. For connection with RBS, the highest regions of stress occur in reduced beam section of the beam.

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Analytical study on new types of reduced beam section moment connections affecting cyclic behavior

Cited by 55 publications

References 6 publications

Design Approach To Bolted End-Plate Vertical-Slits RWS Connection

Design Approach To Bolted End-Plate Vertical-Slits RWS Connection

Effect of Different Design Parameters on the Cyclic Response of Reduced Beam Sections (RBS) Moment Connections

Studi Perilaku Pada Sambungan Rectangular Concrete Filled Tubes (Rcft) Dengan Metode Finite Element

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