On the accuracy of enhanced pushover procedures for seismic performance evaluation of code-conforming RC moment-resisting frame buildings subjected to pulse-like and non-pulse-like excitations

Daei, Aydin; Poursha, Mehdi

doi:10.1016/j.istruc.2021.03.035

Cited by 17 publications

(3 citation statements)

References 49 publications

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“…The first three natural vibration periods of the frames based on the uncracked and cracked concrete properties obtained by OpenSees and ETABS, respectively, are provided in Table 2. For more detailed information about the numerical models, refer to (Daei et al, 2022; Daei and Poursha, 2021).…”

Section: Analytical Modeling Of the Test Buildingsmentioning

confidence: 99%

Sensitivity of structural responses to the processing of near-fault ground motion records containing fling-step

Daei

Poursha

Zarrin

2023

Advances in Structural Engineering

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Fling-step is one of the important characteristics of near-fault ground motions that is caused by a permanent static offset of the ground and appears as a one-sided velocity pulse and a large residual displacement at the end of the motion. Due to baseline errors in many ground motion records, they are processed (processing is a combination of baseline correction and filtering) before adding accelerograms to some earthquake databases whereby the residual displacements ( i.e., the permanent static offsets) in the fling records are typically eliminated. It is not clear to what extent the record processing can affect the nonlinear responses of structures subjected to fling-step records. To address this issue, the current study is conducted to investigate the sensitivity of the nonlinear structural responses to record processing. To achieve this goal, the seismic responses of three code-conforming reinforced concrete (RC) special moment-resisting frames with different heights subjected to two versions of fling-step ground motions including a processed version that static offsets are removed, and a baseline-corrected version with static offsets preserved are evaluated. The findings of this assessment indicate that even though the processing procedure does not preserve the static offsets of the fling-step ground motions, the seismic responses of the structures to the processed records may resemble those obtained under only the baseline-corrected ground motions (with static offsets preserved).

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Section: Analytical Modeling Of the Test Buildingsmentioning

confidence: 99%

Sensitivity of structural responses to the processing of near-fault ground motion records containing fling-step

Daei

Poursha

Zarrin

2023

Advances in Structural Engineering

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“…Nonlinear static or pushover analysis is used to analyze the earthquake resistance of structures. It is a part of performance-based seismic (PBS) design that is widely used for new structures or for evaluating existing buildings [3]. Static loads are applied to each floor, resulting in a demand curve representing the structural behavior [4].…”

Section: Introductionmentioning

confidence: 99%

Performance-based Analysis of Building Structures in Various Earthquake Zones

Nurjannah,

Rosidawani,

Saloma

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The structural design of an eight-story building was examined to determine its performance in resisting ultimate loads. This was necessary for applying the building design in Indonesian regions with low to high seismic hazard levels. Studies have indicated that pushover analysis is suitable to assess the capacity of building structures against earthquake loads. However, as the structural design of each building produces its nominal strength, performance analysis must always be conducted. This study aimed at comparing the structural performance of buildings in regions with low, medium, and high seismic hazards, represented by the cities of Palembang, Jakarta, and Palu, respectively. A performance-based analysis was conducted using the pushover method to obtain the performance points. The responses of the building structures were the base shears, floor drifts, and inter-story drifts. The structural performance levels in the three regions were between immediate occupancy and life safety or were categorized as damage control, indicating minor damage. Because the structures exhibited high stiffness and ductility, they resisted the ultimate forces up to the damage control performance level in all regions. The greatest lateral drifts of 79.744 mm and 51.656 mm in the X- and Y-axis directions, respectively, occurred in Palu’s high seismic hazard region. The lowest lateral drift occurred in Palembang’s low seismic hazard region, in the X- and Y-axis directions of 59.401 mm and 38.378 mm, respectively.

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“…Some examples and comparisons between enhanced pushover procedures and nonlinear time history analysis can be found in Shayanfar et al., [ 18 ] Bidoki and Shayanfar, [ 19 ] Christianto at al., [ 20 ] Daei and Zarrin, [ 21 ] Daei and Poursha. [ 22 ] All these attempts have lead to an improvement of nonlinear static analysis method, but concerning the nonlinear dynamic analysis much remains to be done.…”

Section: Introductionmentioning

confidence: 99%

A reduced order model for nonlinear time history seismic analyzes of elasto‐plastic 3D frame structures

Magisano

Corrado

Madeo

et al. 2022

Earthq Engng Struct Dyn

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A reduced order model for the nonlinear dynamic seismic analysis of elastoplastic 3D frame structures is presented. It is based on an approximated solution space for the displacement field that is assumed as the sum of two subspaces. The first subspace is generated by the relevant linear elastic modes of the generalized stiffness/mass linear eigenvalue problem in terms of participation factor. The second one is defined by collapse mechanisms associated to appropriate static load distributions. The time history analyzes are carried out within the reduced solution space, while the internal forces are evaluated on the full model to guarantee an accurate description of the constitutive laws. The proposed reduction method was tested for different structural geometries varying frequency content, direction and amplitude of the ground motion. Numerical results show accuracy and robustness also employing a few tens of modes, including elastic modes and plastic collapse mechanisms. In particular, the need for plastic modes in capturing the structural dynamics in case of seismic actions leading to significant plastic excursions is emphasized. This highlights the limits of simplified approaches based on the hypothesis of shape conservation in nonlinear problems, regardless of the building regularity.

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On the accuracy of enhanced pushover procedures for seismic performance evaluation of code-conforming RC moment-resisting frame buildings subjected to pulse-like and non-pulse-like excitations

Cited by 17 publications

References 49 publications

Sensitivity of structural responses to the processing of near-fault ground motion records containing fling-step

Sensitivity of structural responses to the processing of near-fault ground motion records containing fling-step

Performance-based Analysis of Building Structures in Various Earthquake Zones

A reduced order model for nonlinear time history seismic analyzes of elasto‐plastic 3D frame structures

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