A multi-objective design method for seismic retrofitting of existing reinforced concrete frames using pin-supported rocking walls

Chen, Yue; Xu, Ran; Wu, Hui-Ping; Sheng, Tao

doi:10.1007/s11709-022-0851-z

Cited by 2 publications

(4 citation statements)

References 27 publications

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“…On the other hand, pinned walls amplify the response over a wide range of periods. Other scholars focused on the design methods of rocking wall frame structures 17,18 …”

Section: Introductionmentioning

confidence: 99%

“…Other scholars focused on the design methods of rocking wall frame structures. 17,18 Despite the utility of coupling rocking walls with frame structures, it is important to recognize that there exist certain constraints related to energy dissipation. Generally, rocking walls face challenges in reducing the displacement response of frame structures and may even amplify it.…”

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confidence: 99%

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Seismic response analysis of single‐degree‐of‐freedom structure coupled with tuned self‐centering wall

Wu,

Ogail,

2024

Earthq Engng Struct Dyn

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This paper investigates the possibility of using self‐centering walls (SCWs) as tuned mass dampers (TMDs) to control the seismic response of structures. The basic characteristics of this system are investigated using a two‐degree‐of‐freedom (2‐DOF) model, representing the main structure as a single‐degree‐of‐freedom (SDOF) oscillator interconnected with an SCW through viscous and elastic devices. The nonlinear equations of motion for the proposed coupled system are derived and then utilized to determine the displacement amplification response. The coupling parameters are optimized to minimize the dynamic response of the oscillator using a numerical method. A simulation study is conducted to investigate the response of the proposed system by considering six recorded earthquakes. Several parameters are studied, including the mass ratio, the influence of prestressing, and the slenderness angle of the wall. The displacement spectra are generated using the optimized parameters and compared to those of the uncoupled system and the traditional coupled system, which features a rigid connection between the structure and the wall. The results reveal that the proposed system effectively suppresses both maximum and root mean square responses of structures, outperforming the traditional coupled system in most cases. Improved performance for the proposed system can be achieved by increasing the wall's mass ratio and decreasing the slenderness angle. Moreover, prestressing has an adverse impact on the system's displacement response. Finally, the influence of wall flexibility is examined using a finite element model, revealing a minimal effect on the system's response.

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“…On the other hand, pinned walls amplify the response over a wide range of periods. Other scholars focused on the design methods of rocking wall frame structures 17,18 …”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Seismic response analysis of single‐degree‐of‐freedom structure coupled with tuned self‐centering wall

Wu,

Ogail,

2024

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

show abstract

“…There were many common strengthening methods, including increasing section, replacing concrete, outsourcing section steel, sticking FRP, adding support, and adding shear wall. [3][4][5][6][7][8] Isaac et al 9,10 verified that the structural properties of steel section concrete were superior to those of traditional RC structures. Adam et al 11 strengthened RC columns with external section steel and verified the feasibility of strengthening through axial compression test study and finite element software modeling analysis of specimens.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, the seismic performance of strengthening RC frame structures had been extensively studied. There were many common strengthening methods, including increasing section, replacing concrete, outsourcing section steel, sticking FRP, adding support, and adding shear wall 3–8 . Isaac et al 9,10 verified that the structural properties of steel section concrete were superior to those of traditional RC structures.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the influence on structural seismic performance by the composite reinforcement method

Chu

et al. 2023

Structural Concrete

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This paper proposed three composite strengthening methods for repairing seismic‐damaged RC frames to restore their seismic capacity. Combined with the damage characteristics and failure mode of the frame under the earthquake action, the local strengthening of the column adopts the angle steel and gusset plate, and then the whole frame is strengthened by the inclined brace, the thin‐walled steel plate and the V‐shaped buckling restrained brace (BRB), respectively. Through the cyclic loading test, the main seismic indexes of the strengthened specimen, including hysteresis curve, skeleton curve, ductility, energy dissipation capacity, and stiffness degradation, are studied. The influence of different strengthening methods on the seismic performance of the seismic‐damaged specimens is analyzed. The results show that the seismic performance of strengthened specimens is significantly improved, and the bearing capacity, ductility, and energy dissipation capacity are increased by 2.58–5.57, 1.05–1.24, and 7.67–15.87 times, respectively. The thin‐walled steel plate shear wall and the inclined brace are destroyed at first during loading to effectively delay the premature destruction of the main frame. The composite strengthening method makes the original frame realize the failure mechanism of “strong joint weak member, strong column weak beam” under strong earthquake action. The strengthened specimen satisfies the seismic requirement and has good seismic performance. The seismic performance of the frame strengthened with the V‐shaped BRB is better than that of the other two strengthening methods. Based on the test date, the formula for calculating the shear‐bearing capacity of the beam end is presented.

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A multi-objective design method for seismic retrofitting of existing reinforced concrete frames using pin-supported rocking walls

Cited by 2 publications

References 27 publications

Seismic response analysis of single‐degree‐of‐freedom structure coupled with tuned self‐centering wall

Seismic response analysis of single‐degree‐of‐freedom structure coupled with tuned self‐centering wall

Analysis of the influence on structural seismic performance by the composite reinforcement method

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