A Novel Framework to Include P-Δ Effects in Displacement-Based Seismic Assessment

Belleri, Andrea; Torquati, Mauro; Marini, Alessandra; Riva, Paolo

doi:10.1080/13632469.2016.1178193

Cited by 8 publications

(7 citation statements)

References 8 publications

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“…The P-delta effect is also known as the geometric non-linearity [24]. For P-delta effects consideration in the displacement-based assessment (DBA) procedure, a static pushover analysis of the Multi Degree of Freedom (MDOF) system must be performed on the replacement structure capacity curve [25]. P-delta effects also improves the structures flexibility, Additionally, it lowers the ability to carry lateral loads due to the lateral shifting of gravity loads carried on by significant inelastic drift about the line of support response [26].…”

Section: P-delta Effectmentioning

confidence: 99%

Pushover Analysis of Multi-Story Reinforced Concrete Frame Structure

Ali¹,

Yasin²

2023

J Econ Managem Res

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Pushover analysis is a non-linear static procedure (NSP) used to examine the structural response of a building during the inelastic limit before it reaches the edge of partial or total collapse. In this study a model of multi-story reinforced concrete building along with applied loads is analyzed in powerful non-linear static procedure using computer software ETABS. A limited number of horizontal forces are then applied to imitate the impact of ground movement. The building is supposed as a 6-story building, no shear walls used in the model as the level of earthquake hazard assumed very low. Moreover, deformations are determined. The forces would then be increased gradually, NSPs convert multi-degree of freedom models to single-degree of freedom models utilizing a pushover analysis to determine capacity curve or pushover curve which is horizontal roof displacement vs base shear, This curve plot reveals the highest base motion that the structure can withstand, and then estimate the maximum global displacement by combining a ground response spectrum with the capacity curve.

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Section: P-delta Effectmentioning

confidence: 99%

Pushover Analysis of Multi-Story Reinforced Concrete Frame Structure

Ali¹,

Yasin²

2023

J Econ Managem Res

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“…During an earthquake, second order P-D effects could significantly increase the horizontal displacements achieved by a structure and therefore need to be accounted for in a seismic assessment procedure. The methodology proposed in Belleri et al (2017a) is considered herein. Such procedure is briefly summarized in the following.…”

Section: P-d Effectsmentioning

confidence: 99%

“…The correction factor l has been derived from a parametric analysis considering different values of post-yield stiffness ratio, system ductility and effective period. A series of non-linear dynamic analyses of SDOF systems allowed the calibration of the coefficients of Eq.11 by means of nonlinear regression analyses (Belleri et al, 2017a).…”

Section: Du Dymentioning

confidence: 99%

Displacement-Based Seismic Assessment for Precast Concrete Frames with Non-Emulative Connections

Torquati

Belleri

Riva

2018

Journal of Earthquake Engineering

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The paper develops a methodology for the seismic vulnerability assessment, Displacement Based Assessment (DBA), of one-storey and multi-storey precast concrete frames with nonemulative connections. The method is based on the Direct Displacement Based Design procedure initially developed by Priestley. The DBA is particularly suitable for the evaluation of the seismic response of flexible structures, as it considers displacements as the leading parameters to estimate the seismic vulnerability. The proposed procedure specifically accounts for the influence of beam-column connections, P-∆ effects and second mode of vibration. The validation has been performed by means of nonlinear time history analyses.

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“…Paulay, 2 Bernal, 3 Miranda and Akkar, 7 Amara et al 8 ). The second approach, however, with the increasing popularity of displacement-based design methodologies, is also gaining attention, as shown by studies conducted by Asimakopoulos et al, 9 Belleri et al, 10 Pourali et al 11 and De Francesco and Sullivan. 12,13 In previous studies, as in some current codes and standards, there is no distinction between strength and displacement amplifications due to 𝑃Δ effects, as highlighted by Wei et al 14 This is likely to be the result of a direct (but improper) extension of the 𝑃Δ analysis of elastic systems to inelastic.…”

Section: Introductionmentioning

confidence: 99%

Accounting for hysteretic characteristics in P‐delta analysis of structures

Francesco

Sullivan

2023

Earthq Engng Struct Dyn

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Studies in the literature have shown that P‐delta () effects are highly influenced by the hysteretic characteristics of a structural system. However, international buildings and bridge codes prescribe ‐induced amplification factors, limits for negligible effects and limits for dynamic instability that neglect this influence. As a result, different margins of safety against actions are currently specified for different structural systems, with steel structures, for example, presenting reduced margins of safety with respect to concrete structures. Adopting a sub‐set of the PEER earthquake record database composed of 1964 earthquake records, this paper presents a statistical analysis of displacement amplification ratios for systems with different hysteretic models, fundamental periods and ductility levels. In terms of both elastic and inelastic stability coefficients, limit values of the stability coefficient for negligible effects and dynamic instability are proposed for the most common structural typologies, such as steel, well and poorly detailed reinforced concrete, and self‐centering structures. Analytical estimates of the median, 84th and 98th percentile values of the displacement amplification that take into account the combined effect of stability coefficient, ductility level and hysteretic properties are proposed.

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A Novel Framework to Include P-Δ Effects in Displacement-Based Seismic Assessment

Cited by 8 publications

References 8 publications

Pushover Analysis of Multi-Story Reinforced Concrete Frame Structure

Pushover Analysis of Multi-Story Reinforced Concrete Frame Structure

Displacement-Based Seismic Assessment for Precast Concrete Frames with Non-Emulative Connections

Accounting for hysteretic characteristics in P‐delta analysis of structures

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