Displacement ductility demand and strength reduction factors for rocking structures

Trueb, Martin; Belmouden, Y.; Lestuzzi, Pierino

doi:10.2495/eres070191

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…The peak nonlinear displacement (u) is divided by the yield displacement (y) to get the displacement ductility demand (d). [10].…”

Section: Ductility Demand Of the Structurementioning

confidence: 99%

Seismic Evaluation of Step-Back Building and Regular Building by Using Nonlinear Static and Nonlinear Dynamic Analysis

Sharma,

Dwivedi,

Rani

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The structural configuration of hill slope buildings differs from that of flat land buildings. During previous earthquakes, buildings located on a hill slope suffer severe damage/collapse even in moderate earthquakes. In comparison to flat land buildings, in both plan and elevation, these hillside structures are highly uneven. Under lateral loading, these buildings may subjected to severe torsion, and collapse may occur. The Indian Standards code, like many other national codes, does not provide the necessary insight into the expected performance and associated vulnerability of hill slope buildings. Hence, the purpose of this research was to compare the seismic behaviour of structures on hill slopes to that of buildings on level ground. To estimate the seismic performance and vulnerability of the step-back building, it is modelled in software SAP 2000 v.20.2.0 and NLSA and NLTHA are performed as per FEMA-356 and ATC-40. The seismic response of hill slope buildings is compared to flat land regular buildings in terms of capacity curve, ductility demand, hinge pattern and inter-storey drift at different PGAs. It has been noted that the story directly above the uppermost foundation level is where step-back buildings typically fail. The uphill side of the step-back buildings sustains significant damage. In general, the least vulnerable buildings are those on flat land, whereas those on hill slopes are considered to be the most vulnerable.

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“…The peak nonlinear displacement (u) is divided by the yield displacement (y) to get the displacement ductility demand (d). [10].…”

Section: Ductility Demand Of the Structurementioning

confidence: 99%

Seismic Evaluation of Step-Back Building and Regular Building by Using Nonlinear Static and Nonlinear Dynamic Analysis

Sharma,

Dwivedi,

Rani

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

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“…This issue has been the topic of much research effort and various approximate expressions between the reduction factor, the ductility and elastic period can be found in the literature [e.g. 22,23]. Here, the following expressions are employed because, despite their simplicity, provide reasonably accurate results [24].…”

Section: Lef-l A399-l Lef-l A399-lmentioning

confidence: 99%

Damage Potential Prediction of Greek Earthquakes Based on Spectral Sustainability Measures Derived from 3-D Displacement Response Spectra: Part – I

Koliopoulos¹

2014

TOBCTJ

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The aim of this work is the investigation of the correlation between seismic damage measures and the sustainability of response displacement peak, deduced from novel 3-D response spectra. These spectra are produced with relatively small additional computational cost compared to their 2-D counterparts and incorporate valuable additional information concerning the sustainability of conventional spectral values to the rest of major response cycles. The utilization of 3-D response spectra leads to the computation of handy sustainability indices, proposed herein, that reflect the sensitivity of standard response spectra values to (i) the number of significant response half-cycles (‘transversal’ sustainability index λ1) and (ii) the elongation of fundamental elastic period due to inelastic response (‘horizontal’ sustainability index λ2). Based on selected Greek ground motion records, a time domain inelastic dynamic analysis study was performed for elasto-plastic single degree of freedom (sdof) oscillators. The results reveal the strong correlation between the spectral sustainability indices and the damageability of each record and were utilized to produce empirical estimators as functions of the aforementioned sustainability indices, in order to serve as reliable predictors of standard damage indices. The applicability of the findings to a greater sample of ground motion records and more realistic structural systems (such as single and multi-storey plane RC frames) has been confirmed and will be presented in a forthcoming companion publication.

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Displacement ductility demand and strength reduction factors for rocking structures

Cited by 2 publications

References 2 publications

Seismic Evaluation of Step-Back Building and Regular Building by Using Nonlinear Static and Nonlinear Dynamic Analysis

Seismic Evaluation of Step-Back Building and Regular Building by Using Nonlinear Static and Nonlinear Dynamic Analysis

Damage Potential Prediction of Greek Earthquakes Based on Spectral Sustainability Measures Derived from 3-D Displacement Response Spectra: Part – I

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