Seismic shear distribution among interconnected cantilever walls of different lengths

Beyer, Katrin; Simonini, Sabrina; Constantin, Raluca; Rutenberg, Avigdor

doi:10.1002/eqe.2403

Cited by 12 publications

(11 citation statements)

References 11 publications

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“…As the two walls must have the same displaced shape (rigid diaphragm assumption) this generates compatibility forces in the floor slabs. These compatibility forces primarily manifest themselves as large variations to the expected shear profiles in the walls, as discussed in Beyer et al (2014). However, shear forces are not the focus of this work.…”

Section: Results For the Unequal Length Walls Buildingmentioning

confidence: 96%

Evaluation of seismic assessment procedures for determining deformation demands in RC wall buildings

Fox¹,

Sullivan²,

Beyer³

2015

Earthquakes and Structures

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Abstract. This work evaluates the performance of a number of seismic assessment procedures when applied to a case study reinforced concrete (RC) wall building. The performance of each procedure is evaluated through its ability to accurately predict deformation demands, specifically, roof displacement, inter-storey drift ratio and wall curvatures are considered as the key engineering demand parameters. The different procedures include Direct Displacement-Based Assessment, nonlinear static analysis and nonlinear dynamic analysis. For the latter two approaches both lumped and distributed plasticity modelling are examined. To thoroughly test the different approaches the case study building is considered in different configurations to include the effects of unequal length walls and plan asymmetry. Recommendations are made as to which methods are suited to different scenarios, in particular focusing on the balance that needs to be made between accurate prediction of engineering demand parameters and the time and expertise required to undertake the different procedures. All methods are shown to have certain merits, but at the same time a number of the procedures are shown to have areas requiring further development. This work also highlights a number of key aspects related to the seismic response of RC wall buildings that may significantly impact the results of an assessment. These include the influence of higher-mode effects and variations in spectral shape with ductility demands.

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Section: Results For the Unequal Length Walls Buildingmentioning

confidence: 96%

Evaluation of seismic assessment procedures for determining deformation demands in RC wall buildings

Fox¹,

Sullivan²,

Beyer³

2015

Earthquakes and Structures

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“…If the ratio of shear to flexural displacements is less than approximately 10 %, its effect on EDPs in statically determined systems is typically small. Note, however, that the shear flexibility can influence the force distribution in statically indetermined systems even if the shear flexibility is low [29,32]. Shear deformations, as well as shear-flexure interaction, can be accounted for in different ways depending on the chosen modelling approach [60].…”

Section: Modelling Of Shear Deformationmentioning

confidence: 99%

“…Although initially limited to research purposes [27], the increase of computational power is progressively bringing this modelling approach closer to being a practical tool for design engineers, delivering reliable and robust results [28]. Since shell elements, associated to multiaxial constitutive laws, are amongst the available tools of analysis that provide more detailed results, they have been used to improve or calibrate modelling techniques demanding less computational power [29].…”

Section: Introductionmentioning

confidence: 99%

“…Exploring the complex range of available modelling approaches has naturally raised interest within the scientific community [29,36,37]. However, most of the comparisons typically focus on the global level of analysis and do not address comprehensively the relation between the latter and the local levels of the mathematical model in consideration.…”

Section: Introductionmentioning

confidence: 99%

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Modelling Approaches for Inelastic Behaviour of RC Walls: Multi-level Assessment and Dependability of Results

Almeida

Tarquini

Beyer

2014

Arch Computat Methods Eng

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The severe damage and collapse of many reinforced concrete (RC) wall buildings in the recent earthquakes of Chile (2010) and New Zealand (2011) have shown that RC walls did not perform as well as required by the modern codes of both countries. It seems therefore appropriate to intensify research efforts towards more accurate simulations of damage indicators, in particular local engineering demand parameters such as material strains, which are central to the application of performance-based earthquake engineering. Potential modelling improvements will necessarily build on a thorough assessment of the limitations of current state-ofthe-practice simulation approaches for RC wall buildings. This work compares different response parameters obtained from monotonic analyses of RC walls using numerical tools that are commonly employed by researchers and specialized practitioners, namely: plastic hinge analyses, distributed plasticity models, and shell element models. It is shown that a multi-level assessment-wherein both the global and local levels of the response are jointly addressed during pre-and post-peak response-is fundamental to define the dependability of the results. The displacement demand up to which the wall response can be predicted is defined as the first occurrence between the attainment of material strain limits and numerical issues such as localization. The present work also presents evidence to discourage the application of performance-based assessment of RC walls relying on nonregularized strain EDPs.

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“…Although the shear stiffness of ductile walls is non-linear, previous studies on cantilever walls showed that linear springs yield reasonable estimates of the system's base shear (Beyer et al, 2014). The stiffness of the springs was determined using Equation 28 from Beyer et al where Δ s and Δ f are the shear and flexural deformations respectively, ϕ is the curvature, ε m is mean axial strain, β cr is the maximum crack inclination (assumed to be 45 o ) and H n is the shear span.…”

Section: Modelling and Analysismentioning

confidence: 99%

Capacity Design of Coupled RC Walls

Fox

Sullivan

Beyer

2014

Journal of Earthquake Engineering

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Acknowledgements: The authors would like to thank Professor Nigel Priestley for his input at various stages of this research. The first author would also like to acknowledge the funding provided by the MEEES programme (www.meees.org).Capacity design aims to ensure controlled ductile response of structures when subjected to earthquakes. This research investigates the performance of existing capacity design equations for reinforced concrete coupled walls and then proposes a new simplified capacity design method based on state-of-the-art-knowledge. The new method is verified through a case study in which a set of 15 coupled walls are subject to non-linear time-history analyses. The work includes examination of the maximum shear force in individual walls in relation to the total maximum shear force in the coupled wall system, and subsequently provides recommendations for design.

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Seismic shear distribution among interconnected cantilever walls of different lengths

Cited by 12 publications

References 11 publications

Evaluation of seismic assessment procedures for determining deformation demands in RC wall buildings

Evaluation of seismic assessment procedures for determining deformation demands in RC wall buildings

Modelling Approaches for Inelastic Behaviour of RC Walls: Multi-level Assessment and Dependability of Results

Capacity Design of Coupled RC Walls

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