scholarly journals IMPROVEMENT OF BEARING FAILURE BEHAVIOR OF S BEAM – RC COLUMN JOINT USING PERFOBOND PLATE CONNECTOR

2010 ◽  
Vol 75 (655) ◽  
pp. 1727-1735 ◽  
Author(s):  
Yasushi NISHIMURA ◽  
Mikihito YOSHIDA ◽  
Keiichi SAITO ◽  
Naoki AOYAMA
Keyword(s):  
Failure Behavior ◽  
Bearing Failure ◽  
Rc Column ◽  
Column Joint

scholarly journals IMPROVEMENT OF BEARING FAILURE BEHAVIOR OF T-SHAPED S BEAM – RC COLUMN JOINTS USING PERFOBOND PLATE CONNECTORS

2018 ◽  
Author(s):  
Mikihito Yoshida ◽  
Yasushi Nishimura
Keyword(s):  
Shear Strength ◽  
Shear Failure ◽  
Reinforcement Ratio ◽  
The Other ◽  
Failure Behavior ◽  
Transverse Reinforcement ◽  
Bearing Failure ◽  
Test Results ◽  
Rc Column ◽  
Reinforcing Bar

For the joints composed of steel beams and reinforced concrete columns, shear failure and bearing failure are the key failure modes. The shear failure indicates stable hysteresis loop without the strength degradation. On the other hand, the bearing failure mode indicates large pinching and strength degration after the attainment of the maximum load.Accordingly, bearing failure in the joints should not be caused in RCS system.To improve the bearing failure behavior of S beam - RC column joint, joint details using perfobond plate connectors were proposed. Perfobond plate connectors were attached on the upper and bottom flanges at right angles to the steel flange. The objective of this study is to clarify the effectiveness of proposed joints details experimentally and theoretically.Six specimens were tested. All specimens were T-shaped planar beam - column joints with 350mm square RC column and S beams with the width of 125mm and the depth of 300mm. The beams were all continuous through the column.Perfobond plate connectors were attached on the bottom flanges at right angles to the steel flange.Three holes were set up in the perfobond plate connectors. The experimental variable was the transverse reinforcement ratio of the joints. The transverse reinforcement ratio of the joints was 0.181% and 0.815%. For each transverse reinforcement ratio of the joints, specimen without the perfobond plate connectors, specimen with the perfobond plate connectors and specimen with the reinforcing bar inserted the hole of perfobond plate connectors were planned.For all specimens, the hysteresis loop showed the reversed S-shape. However, energy dissipation for specimens for specimens with perfobond plate connectors was larger than of specimen without perfobond plate connectors. Bearing strength of specimens with perfobond plate connectors was larger than that of specimen without perfobond plate connectors. From the test results, shear strength of concrete connector a hole was 0.7 times compression strength of concrete.On the other hand, shear strength of inserted reinforcing bar was 1.25 times shear strength of reinforcing bar.Based on the stress transferring mechanism and resistance mechanism of joints proposed by authors, the design formulae of joints with perfobond plate connectors were proposed.The predictions were shown to be in good agreement with the test results.

scholarly journals SHEAR BEHAVIOR OF INNER PANEL OF S BEAM-RC COLUMN JOINT

2010 ◽  
Vol 75 (653) ◽  
pp. 1393-1400 ◽  
Author(s):  
Yasushi NISHIMURA ◽  
Mikihito YOSHIDA
Keyword(s):  
Shear Behavior ◽  
Rc Column ◽  
Column Joint

The Experimental Investigation of Slab Participation in Flexural Behavior of Beams under Two-Way Loading

2011 ◽  
Vol 105-107 ◽  
pp. 969-975
Author(s):  
Deng Li Gao ◽  
Zhen Bao Li ◽  
Guo Feng Wang ◽  
Jian Cheng Li
Keyword(s):  
Reinforced Concrete ◽  
Flexural Behavior ◽  
Failure Behavior ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Load Carrying ◽  
Column Joint ◽  
Loading Methods ◽  
Loading Modes ◽  
Effective Flange Width

The paper designed three joints namely beam-column joint of reinforced concrete frame without slab and two beam-column joints of reinforced concrete frame with slab, using different loading methods (one direction and two directions) to experiment. The paper studied failure behavior, load-carrying capacity, and slab participation in flexural behavior of beam under different loading modes. Experiment shows that for the joints with slab, flexural capacity at end of the beam under two direction loads than one direction loads lows by about 10%; under one direction load, effective flange width of slab should be taken 8 times thickness, under two direction loads, effective flange width of slab should be taken 10 times thickness.

Predicting Failure Behavior of Reinforced Concrete Columns Subjected to Cyclic Loading

2011 ◽  
Vol 145 ◽  
pp. 309-313
Author(s):  
Chia Hung Lin ◽  
Chin Hsiung Loh
Keyword(s):  
Reinforced Concrete ◽  
Failure Mode ◽  
Shear Capacity ◽  
Flexural Behavior ◽  
Cyclic Test ◽  
Design Stage ◽  
Failure Behavior ◽  
Rc Column ◽  
Flexural Failure ◽  
Truss Model

A procedure derived from truss model was established to predict rapidly the failure mode of a reinforced concrete column in the design stage. Failure mode of an RC column can be classified as either shear or flexural failure. In general, an RC column can be assumed to be a beam-column member subjected to combined axial, flexural, and shear forces. It is difficulty to predict its overall failure behavior without a priori knowledge. Thus in this paper, the shear capacity is isolated independently from the complex behavior of a column based on the concept of well known truss model. The shear capacity can be viewed as the contribution of diagonal truss of a truss model while the longitudinal truss modeled the combined axial-flexural behavior. The obtained shear capacity using the proposed method can be compared with flexural capacity obtained from pushover analysis to predict whether shear failure or flexural failure will occur during cyclic test of an RC column. Five cyclic test results were compared to the predicted analytical results. All five failure modes are successfully predicted using the proposed procedure.

Relative Analysis of Post Anchored RC Column Members with Different Material under Repeated Load

2012 ◽  
Vol 446-449 ◽  
pp. 3503-3507
Author(s):  
Hai Zhen Bao ◽  
Xin Gang Zhou ◽  
Hua Ming Sun
Keyword(s):  
Energy Dissipation ◽  
Carrying Capacity ◽  
Seismic Behavior ◽  
Adhesively Bonded ◽  
Anchorage Length ◽  
Rc Column ◽  
Load Carrying ◽  
Column Joint ◽  
Energy Dissipation Capacity ◽  
Repeated Load

In order to study the seismic behavior of post anchored RC members with different anchoring materials, such as the ductility, load carrying capacity, energy dissipation, etc, eight RC column joint specimens were designed and tested under repeated cyclical load. Comparing the test result with existing findings, it has shown that column members with organic adhesively bonded rebars which anchorage length is more than 15D, have good carrying capacity, ductility and energy dissipation capacity. Due to the inorganic material is short of deformability, it could satisfy the demand of seismic behavior when the anchorage length is lager than 20D.

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