Experimental study of reinforced concrete and hybrid coupled shear wall systems

This study presents shear resistance of precast reinforced concrete (RC) shear walls. A novel assembling method for upper and lower wall panels is proposed, whereas vertical steel bars are grouped into bundles and effectively connected in preformed holes. To evaluate the feasibility and shear resistance of such a connection method, three specimens of precast shear walls with different horizontal steel bars have been constructed and tested under monotonic loading while subjected to a constant vertical compression. The results show that cracks mainly appear under the line that connects the midpoint of tension side and the corner of the compression side. The weak section of these shear walls is at the top of the preformed holes, and through cracks do not appear at the bottom of walls. These innovative precast shear walls are reliable, and no rebar is pulled out or seriously slipped. The yield load of the shear wall is great, and the stage between yield and failure is satisfactory. The bearing capacity declines slowly after the peak value.

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Identification of the dynamic properties of a reinforced concrete coupled shear wall residential high-rise building

Canadian Journal of Civil Engineering ◽

10.1139/l2012-047 ◽

2012 ◽

Vol 39 (6) ◽

pp. 631-642 ◽

Cited By ~ 2

Author(s):

Natthapong Areemit ◽

Michael Montgomery ◽

Constantin Christopoulos ◽

Agha Hasan

Keyword(s):

Reinforced Concrete ◽

State Of The Art ◽

Dynamic Properties ◽

Shear Wall ◽

Full Scale ◽

Design Parameters ◽

High Rise ◽

Coupled Shear Wall ◽

Current State

As high-rise buildings increase with height and slenderness, they become increasingly sensitive to dynamic vibrations, and therefore the natural frequency of vibration and damping ratio are very important design parameters, as they directly impact the design wind forces. Recent advances in sensing and computing technology have made it possible to monitor the dynamic behaviour of full-scale structures, which was not possible in the past. Full-scale validation of the dynamic properties is useful for high-rise designers to verify design assumptions, especially since recent measurements have shown that damping decreases as the height of the building increases, and in situ damping measurements have been lower than many currently assumed design values, potentially leading to unconservative designs. A 50-storey residential building in downtown Toronto, with a reinforced concrete coupled shear wall lateral load resisting system with outriggers was monitored using current state-of-the-art sensing technologies and techniques to determine, in situ, the dynamic properties under real wind loads. The in situ measurements were then compared with results obtained using current state-of-the-art computer modelling techniques.

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Application of Steel Plates on the Retrofitting of Current Reinforced Concrete Coupling Beams

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.721.714 ◽

2013 ◽

Vol 721 ◽

pp. 714-719

Author(s):

Cheng Bei ◽

Shi Wei Li ◽

Ray K.L. Su

Keyword(s):

Reinforced Concrete ◽

Shear Wall ◽

Steel Plates ◽

Structural Elements ◽

Lateral Loads ◽

Coupling Beams ◽

Coupled Shear Wall

Coupling beams are essential structural elements of reinforced concrete coupled shear wall to resist earthquakes and other lateral loads. But many current reinforced concrete coupling beams are insufficient in resisting lateral loads due to their bad ductility. So a test of retrofitting methods of deep coupling beams with steel plates since their good performance in the ductility and deformation was made to find ways of improving the ductility of the beams, and the results of this retrofitting method prove good because of the incensement of the ductility, deformation and strength of the beams.

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