Shear strength and deformation patterns of R/C walls with aspect ratio 1.0 and 1.5 designed to Eurocode 8 (EC8)

Salonikios, Thomas N.

doi:10.1016/s0141-0296(01)00076-1

Cited by 34 publications

(17 citation statements)

References 5 publications

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“…However, for squat walls that yield in flexural mode (Ho's specimens) and slender walls (aspect ratios 1.5), it tends to overestimate the shear stiffness by more than double. The extensive softening in shear for squat walls presented by Ho [28] compared to Salonikios et al [21,34] could be attributed to the following: (a) Ho's specimens are non-seismically detailed; and (b) they are designed Comparatively, the model of Gérin and Adebar understates the effective shear stiffness for most of the walls by half; see Fig. (7d).…”

Section: Comparisons Of Effective Shear Stiffnessmentioning

confidence: 94%

“…A total of 43 wall specimens have been collected [21,[28][29][30][31][32][33][34][35][36] to form a database for evaluating the shear and flexural stiffness prediction models. The experimental data assembled here encompass RC walls subjected to combined quasistatic reversed cyclic loads and axial loads, except where a wall was monotonically loaded by Oesterle et al [32].…”

Section: Characteristics Of the Population Of Wallsmentioning

confidence: 99%

“…The specimens from the last two references conform to BS8110. Most specimens were designed to yield in flexure except for the squat walls (aspect ratio 1) tested by Salonikios et al [21,34] (shear sliding) and Liu [33] (diagonal tension) which were susceptible to shear failures. The reported failure modes comprise flexural failure, crushing of web or boundary elements, buckling of longitudinal reinforcement and 45 degree diagonal tensile cracks.…”

Section: Characteristics Of the Population Of Wallsmentioning

confidence: 99%

“…Although its contribution is relatively trivial at the yield state, e.g. Salonikios [34], for more precise analyses, its effect on the softening of the effec-tive stiffness should be accounted for, particularly for the ultimate state of squat walls (which could attribute to 20% or more of the total deformation).…”

Section: Limitations and Further Studiesmentioning

confidence: 99%

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Shear and Flexural Stiffnesses of Reinforced Concrete Shear Walls Subjected to Cyclic Loading

Tang¹,

Su²

2014

TOBCTJ

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Seismic analyses of concrete structures under maximum-considered earthquakes require the use of reduced stiffness accounting for cracks and degraded materials. Structural walls, different to other flexural dominated components, are sensitive to both shear and flexural stiffness degradations. Adoption of the gross shear stiffness for walls in seismic analysis prevails particularly for the design codes in the US. Yet available experimental results indicate that this could overstate the shear stiffness by more than double, which would hamper the actual predictions of building periods and shear load distributions among columns and walls. In addition, the deformation capacity could be drastically understated if the stipulated constant ductility capacity is adopted. This paper reviews the available simplified shear and flexural models, which stem from classical mechanics, empirical formulations and/or parametric studies, suitable for structural walls at the state-of-the-art. Reviews on the recommended flexural and shear stiffnesses by prominent design codes such as ACI318-11, Eurocode 8 and CSA are included. A database comprised of walls subjected to reverse-cyclic loads is formed to evaluate the performance of each model. It is found that there exist classical models that could outweigh overconservative codified values with comparable simplicity for practical uses.

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Section: Comparisons Of Effective Shear Stiffnessmentioning

confidence: 94%

Section: Characteristics Of the Population Of Wallsmentioning

confidence: 99%

Section: Characteristics Of the Population Of Wallsmentioning

confidence: 99%

Section: Limitations and Further Studiesmentioning

confidence: 99%

See 2 more Smart Citations

Shear and Flexural Stiffnesses of Reinforced Concrete Shear Walls Subjected to Cyclic Loading

Tang¹,

Su²

2014

TOBCTJ

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“…In fact, with a practical value of applied axial loading, which is about 10 to 30% of the ultimate axial strength, 24 sliding shear failure is commonly suppressed. Recent research 13,14,25 shows that this is also true for an axial load level as low as 7% of the ultimate axial strength of the walls. It is, however, always important to check the possibility of such failure, and the formulae for this checking to the interface shear have been presented by Park and Paulay.…”

Section: General Observationmentioning

confidence: 89%

Enhancing ductility of non-seismically designed RC shear walls

Kuang

2007

Proceedings of the Institution of Civil Engineers - Structures

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Experimental investigation is conducted on the seismic behaviour and ductility enhancement of non-seismically designed reinforced concrete shear walls with various configurations of confinement links. Large-scale squat shear wall specimens are tested under reversed cyclic loads. Emphasis is placed on the effects of the boundary confinement and configuration of confinement links on the improvement of seismic performance and ductility. It has been shown that modification in reinforcement detailing specifications for non-seismic design should be made in order to improve seismic behaviour and enhance ductility capacity, as well as the energy dissipation ability, of reinforced concrete shear walls with non-seismic design for fulfilling the requirements of low to moderate seismicity. This can be achieved by adopting the specific reinforcement detailing, which is proposed based on the results of the experimental study. The proposed reinforcement details include only minor modifications to the detailing techniques of currently practiced non-seismic design, which can lead to an important improvement of ductile response behaviour of the shear walls, but do not result in significant increases in construction cost and difficulty.

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Study on seismic performance of reinforced concrete shear wall with diagonally distributed reinforcement

Gao,

Wang,

Zhu

et al. 2024

Structural Concrete

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Reinforced concrete shear walls in multistory buildings often undergo the combined action of vertical and horizontal loads, with their failure primarily attributed to localized damage of the concrete at the bottom of edge elements, leading to premature loss of wall functionality. To enhance the performance of shear walls, this study explores the optimization of shear wall design from the perspective of the stress path within the wall, introducing a diagonally distributed reinforcements in shear walls (referred to as DDR shear walls). To investigate the seismic performance of DDR shear walls, we consider the effects of axial compression ratio, the inclination angle of distributed reinforcing bars, reinforcing bar spacing, and shear span ratio. We design 27 shear wall models with various parameter combinations and employ ABAQUS finite element analysis software to simulate the seismic performance. The simulation results reveal that the inclined distribution of reinforcing bars significantly enhances the seismic performance of shear walls. To achieve optimal structural performance, the inclination angle of reinforcing bars should be adjusted for different floor levels, with higher floors requiring a greater angle and lower floors a smaller one. Additionally, increasing the reinforcing bar spacing and altering the shear span ratio will have varying degrees of impact on the seismic performance of shear walls, necessitating rational design adjustments based on specific circumstances. Furthermore, the application of DDR shear walls in prefabricated construction can be considered to optimize construction processes.

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Shear strength and deformation patterns of R/C walls with aspect ratio 1.0 and 1.5 designed to Eurocode 8 (EC8)

Cited by 34 publications

References 5 publications

Shear and Flexural Stiffnesses of Reinforced Concrete Shear Walls Subjected to Cyclic Loading

Shear and Flexural Stiffnesses of Reinforced Concrete Shear Walls Subjected to Cyclic Loading

Enhancing ductility of non-seismically designed RC shear walls

Study on seismic performance of reinforced concrete shear wall with diagonally distributed reinforcement

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