Effects of axial load on seismic performance of reinforced concrete walls with short shear span

Looi, D. T. W.; Su, R.K.L.; Cheng, Bei; Tsang, Hing‐Ho

doi:10.1016/j.engstruct.2017.08.030

Cited by 74 publications

(26 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…And found that as the axial load ratio and concrete strength increased, the load-carrying capacity would increase, but the plastic deformation capacity and energy dissipation capacity would decrease. Li et al [27] discussed the effect of the axial compression ratio and shear span ratio on the seismic performance of RC shear walls, with similar findings as that in Looi et al [24][25][26]. Moreover, as the shear span ratio increased, the load-carrying capacity decreases, and the failure pattern shifted from shear to flexure failure.…”

Section: Introductionmentioning

confidence: 60%

“…The deterioration in the mechanical properties of walls after cyclic freezethaw action will directly influence the seismic behavior of the overall shear wall members. In high-rise buildings, shear walls having a small ratio of shear span meet a high risk of shear failure, especially in highly coupled walls supported on transfer structures in low to moderate earthquake areas [24]. However, current research on the seismic behavior of shear walls with a small shear span ratio mainly focuses on various parameters (such as axial compression ratio and concrete strength) under an ambiental conditions [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…In high-rise buildings, shear walls having a small ratio of shear span meet a high risk of shear failure, especially in highly coupled walls supported on transfer structures in low to moderate earthquake areas [24]. However, current research on the seismic behavior of shear walls with a small shear span ratio mainly focuses on various parameters (such as axial compression ratio and concrete strength) under an ambiental conditions [24][25][26][27][28]. Among them, Looi et al [24], Kuang et al [25], and Hidalgo et al [26] performed quasi-static experiments to study the influence of the axial compression ratio and concrete strength on the seismic performance of squat RC shear walls.…”

Section: Introductionmentioning

confidence: 99%

“…However, current research on the seismic behavior of shear walls with a small shear span ratio mainly focuses on various parameters (such as axial compression ratio and concrete strength) under an ambiental conditions [24][25][26][27][28]. Among them, Looi et al [24], Kuang et al [25], and Hidalgo et al [26] performed quasi-static experiments to study the influence of the axial compression ratio and concrete strength on the seismic performance of squat RC shear walls. And found that as the axial load ratio and concrete strength increased, the load-carrying capacity would increase, but the plastic deformation capacity and energy dissipation capacity would decrease.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Seismic behavior of frost-damaged squat RC shear walls under artificial climate environment: a further experimental research

Rong

Zheng

Zhang

et al. 2020

Archiv.Civ.Mech.Eng

View full text Add to dashboard Cite

In cold environment, the damage of freezing and thawing poses a great threat to the safety of concrete structures. In this study, six frost-damaged squat reinforced concrete (RC) shear walls were subjected to low cyclic reversal loading to investigate the effects of axial compression ratio, concrete strength and freeze-thaw cycles (FTCs) on the seismic performance of squat RC shear walls. The seismic behavior of the test specimens was evaluated in terms of the frost action at the microstructure level, frost-heave crack patterns, damage processes, failure patterns, hysteretic behaviors, skeleton curves, deformations, and energy dissipation capacities. It shows that the boundary elements and distributed reinforcements had obvious restraining effects on the development of frost-heave cracks. The FTC action weakened the load-carrying capacity, energy dissipation capacity, and shear resistance capacity of the walls. When the number of FTCs is kept at 200, with the increase of the concrete strength, the gel structure (C-S-H) gradually evolved from fibrous to nets, also the width and number of frost-heave cracks started to reduce, and the distribution of frost-heave cracks evolved from the middle of the specimen to the perimeter. Moreover, the energy dissipation capacity and the ratio of the shear displacement on the whole displacement after cracking loading condition started to increase.

show abstract

Section: Introductionmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Seismic behavior of frost-damaged squat RC shear walls under artificial climate environment: a further experimental research

Rong

Zheng

Zhang

et al. 2020

Archiv.Civ.Mech.Eng

View full text Add to dashboard Cite

show abstract

“…In the seismic design, low rise Reinforced Concrete (RC) shear walls, with height-to-width ratio less than two, are widely used for earthquake resistance in structures. Many studies have demonstrated the excellent seismic behavior of the low rise RC shear walls [ 19 , 20 , 21 , 22 , 23 ]. The development of low rise RAC shear walls has become a significant demand for the recycling of building materials and construction waste.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Behavior of Low Rise Concrete Shear Walls Containing Recycled Coarse and Fine Aggregates

et al. 2017

View full text Add to dashboard Cite

In this study, the cyclic behaviors of low rise concrete shear walls using recycled coarse or fine aggregates were investigated. Eight low rise Recycled Aggregates Concrete (RAC) shear wall specimens were designed and tested under a cyclic loading. The following parameters were varied: replacement percentages of recycled coarse or fine aggregates, reinforcement ratio, axial force ratio and X-shaped rebars brace. The failure characteristics, hysteretic behavior, strength and deformation capacity, strain characteristics and stiffness were studied. Test results showed that the using of the Recycled Coarse Aggregates (RCA) and its replacement ratio had almost no influence on the mechanical behavior of the shear wall; however, the using of Recycled Fine Aggregates (RFA) had a certain influence on the ductility of the shear wall. When the reinforcement ratio increased, the strength and ductility also increased. By increasing the axial force ratio, the strength increased but the ductility decreased significantly. The encased brace had a significant effect on enhancing the RAC shear walls. The experimental maximum strengths were evaluated with existing design codes, it was indicated that the strength evaluation of the low rise RAC shear walls can follow the existing design codes of the conventional concrete shear walls.

show abstract

Simplified seismic axial collapse capacity prediction model for moderately compressed reinforced concrete shear walls adjacent to transfer structure in tall buildings

Shan¹,

Looi

Cheng

et al. 2020

Structural Design Tall Build

View full text Add to dashboard Cite

SummaryNonseismically detailed reinforced concrete (RC) shear walls adjacent to transfer structure in tall buildings are found to have short shear spans and designed to hold considerable axial load. In a previous paper, a Modified Mohr's Axial Capacity Model was developed by the authors to estimate the axial collapse of these RC walls in seismic events, which is expressed as an axial load ratio devised based on classical Mohr's circle framework. It was noted that the previous model can be complicated and appears not suitable for direct adoption in engineering design check. Hence, in this paper, a new simplified seismic axial collapse capacity prediction model is formulated to improvise the previous model. This simplified model typifies the practical range of shear wall geometry, concrete strength, steel reinforcement stress and strain and reinforcement ratio. Simplified charts to estimate maximum shear stress are presented for quicker design check. The complex inelastic buckling stress calculation is simplified into graphs and design equations. A knife‐edge feasible solutions zone is defined, expressed as an inequality function of axial‐to‐shear capacity ratio and additional axial stress induced by lateral shear. Recommendations are made based on results obtained from Genetic Algorithm search and further justified by parametric studies.

show abstract

Effects of axial load on seismic performance of reinforced concrete walls with short shear span

Cited by 74 publications

References 14 publications

Seismic behavior of frost-damaged squat RC shear walls under artificial climate environment: a further experimental research

Seismic behavior of frost-damaged squat RC shear walls under artificial climate environment: a further experimental research

Cyclic Behavior of Low Rise Concrete Shear Walls Containing Recycled Coarse and Fine Aggregates

Simplified seismic axial collapse capacity prediction model for moderately compressed reinforced concrete shear walls adjacent to transfer structure in tall buildings

Contact Info

Product

Resources

About