An experimental study on the strengthening of non-ductile reinforced concrete frames via external shear wall

Kaltakcı, M. Yaşar; Öztürk, Murat

doi:10.1080/19648189.2012.667672

Cited by 11 publications

(4 citation statements)

References 18 publications

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“…Linear and nonlinear capacity curves overlap at the point which corresponds to 75% of the load-bearing capacity of the system [14,15]. The literature states that the value recorded at the moment when capacity reduction reaches 15% or 20% can be taken as the collapse displacement value [11,[16][17]. In the present study, 15% capacity reduction was taken as the basis for the collapse displacement.…”

Section: Comparisons Of Strength and Energy Dissipation Capacities Ofmentioning

confidence: 86%

An Experimental Study on the Strengthening of RC Frames with Soft Storey Irregularities with Different Types of Steel Diagonals

Öztürk

Ogutcu²

2018

Period. Polytech. Civil Eng.

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When the loss of life and property is considered, it is clear that special precautions must be taken against the earthquakes among the natural disasters. Post-earthquake observations, especially those made in the developing countries, reveal that there are many reasons for the damage and loss of life, not just one. The formation of soft storey irregularity is one of the most important factors among them. In this study, it is aimed to propose an alternative strengthening method to eliminate the adverse effects of the formation of a soft storey irregularity. Four identical frames with two stories and single span were constructed and tested under reverse cyclic loading which simulates the earthquake. The first frame among them was prepared by bonding bricks as an infill wall on two stories and it was considered to be the reference frame. In the 2nd frame, the formation of soft storey irregularity was facilitated by removing the infill wall on the lower story and the behavioral differences were examined. The remaining two frames were strengthened by using steel elements in two different diagonal shapes on the lower story. As a result, the experimental study showed that the strengthening with steel diagonal elements increased the lateral load-carrying capacity of the frame with soft storey behavior by 250% and the energy dissipation by 120% and also provided better results than the reference frame.

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Section: Comparisons Of Strength and Energy Dissipation Capacities Ofmentioning

confidence: 86%

An Experimental Study on the Strengthening of RC Frames with Soft Storey Irregularities with Different Types of Steel Diagonals

Öztürk

Ogutcu²

2018

Period. Polytech. Civil Eng.

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“…Infill walls without openings normally have a positive effect on the building's output until exposed to earth quake forces, when window and ventilator openings are given in the infill, this results in a partial infilling concept, which has negative earthquake effects. To scale back such impact, infill wall and shear wall were introduced conjointly and discovered that the buildings having additional range of bays will resist the seismic force (Kaltakci and Ozturk 2012). Various bracing system can be used to resist the lateral load by transferring the shear force from joint to the web member provided as the brace and later transferred to the ground through the column (Guerrero, Escobar, and Teran-Gilmore 2018).…”

Section: Figure1 Buildings With Columns Resting On Plane and Sloped G...mentioning

confidence: 99%

Performance of RCC Frame With Special Confining Reinforcement on Slope

Sivanantham¹,

Selvan²,

K.S.³

2022

JER is an international, peer-reviewed journal that publishes f

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Earthquake is a natural disaster that occurs when the Earth's crust moves suddenly. Every year, hundreds of earthquakes strike various parts of the globe. According to previous research, buildings that are built on sloped terrain are the most susceptible to earthquakes. This is attributable to the different heights of the columns on the ground floor. By changing the height of the column at the base of a 2-D Conventional RCC Frame and a Special Confined RCC Frame, an experimental investigation was carried out in this study. The parameters like load verses deflection, crack width and stiffness degradation was used to draw comparison between the Conventional RCC Frame and Special confined RCC Frame under Reverse Cyclic Loading by using Push and Pull Jack. Hysteresis curve clearly shows that Special Confining reinforcement provided for the column throughout the span because of columns with varying stiffness provides additional strength and performance against lateral force by dissipating energy. The ductility of Short column improved at initial stage, meanwhile the displacement of the Special confined RCC frame with short column also improved due to ductile reinforcement which leads to reduction in failure rate and arrest the sudden failure of the short columns in the frame as that is physically visible from the crack pattern.

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“…Recent studies have shown that the rocking structure as a new seismic structure system plays an excellent seismic energy dissipation role in many structures [6][7][8][9]. For instance, Kaltakci [10] proposed the additional RC shear walls to retrofit the existing RC structures using the coupling beams, leaving certain space for connection. The results indicated the considerable contribution of the external walls to the overall seismic indices, such as carrying capacity, lateral rigidity, and energy dissipation.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Soft-First-Floor Structures Reinforced by Rocking Frame Based on Seismic Resilience

Jiang,

Chen,

et al. 2024

Buildings

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As a no-disturbance integrated-retrofitting technique, an external rocking frame was widely used on reinforced concrete (RC) structures. Yet, with the increasing demand for seismic strengthening of existing buildings, it has become a concern to evaluate the seismic strengthening schemes based on seismic resilience. Firstly, the dynamic equation of the structural system was derived, and the deformation control mechanism was revealed; thus, the corresponding design method was put forward for the rocking frame reinforcement. Secondly, after soft-first-floor structures were reinforced by rocking frames, the evaluation method of the reinforcement scheme was investigated based on seismic resilience. Finally, the feasibility of the assessment method was verified by a soft-first-floor frame structure, and a comparison was made between the method proposed in this paper and the conventional method. The results find that the soft-first-floor structure reinforced by the rocking frame increased by 10% in the inter-layer displacement and improved by 55.6% and 63.0% in the injury and mortality rates, compared to the buckling-restrained brace scheme. This indicates that the reinforcement scheme of soft layer structures with rocking frames is feasible and effective, and the reinforcement evaluation method proposed in this paper can quantitatively reflect the improvement in seismic performance.

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An experimental study on the strengthening of non-ductile reinforced concrete frames via external shear wall

Cited by 11 publications

References 18 publications

An Experimental Study on the Strengthening of RC Frames with Soft Storey Irregularities with Different Types of Steel Diagonals

An Experimental Study on the Strengthening of RC Frames with Soft Storey Irregularities with Different Types of Steel Diagonals

Performance of RCC Frame With Special Confining Reinforcement on Slope

Assessment of Soft-First-Floor Structures Reinforced by Rocking Frame Based on Seismic Resilience

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