Direct estimation of the P-delta effect through the “stability-coefficient-response-spectra” by introducing the “first-storey-single-degree-of-freedom” system

Mousavi, Seyed Mohammad Fard; Şensoy, Serhan

doi:10.1007/s10518-019-00599-z

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…The action of vertical loads acting through structural lateral deformations is well known as the second-order effect or P-Δ effect [2]. P-Δ effect reduces lateral resistance of a system, which under strong excitation may cause partial or total loss of load carrying capacity [3]. This effect can start a pernicious circle against the structural system because the influence of gravity loads increases as the lateral displacement grows while, at the same time, the lateral displacement is magnified as a consequence of gravity loads acting on them [4].…”

Section: Introductionmentioning

confidence: 99%

Influence of the P-delta Effect and Stiffness Irregularity on the Structural Behavior of Reinforced Concrete Buildings

Zavala

Torres

Moreno

2022

J. Phys.: Conf. Ser.

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In this research, the influence of the stiffness irregularity and the p-delta effect on the structural behavior of a reinforced concrete building is analyzed. The main objective is to determine the impact of the stiffness irregularity and the p-delta effect on the structural behavior in regular and irregular buildings. First, the linear dynamic analysis procedure is performed in order to determine the structural response in terms of drifts, shear force and moments per floor. Subsequently, we proceed with the nonlinear static analysis procedure to obtain the capacity curve of the structure. The post elastic stiffness and the overall ductility of the structure are determined from the capacity curve. Finally, a comparative analysis of the responses from the linear and nonlinear analysis is carried out to determine the percentage variation of the results. When analyzing the structures that consider the stiffness irregularity and the p-delta effect, variations of up to 16.50%, 11.00% and 14.00% have been obtained in drifts, shear force and moments per floor respectively, which are considerable values. When the p-delta effect is considered in structures with the presence of stiffness irregularity, there is a variation in stiffness of up to 59.85%. With this result it is explained that the p-delta effect produces a greater degradation of the overall stiffness of the structure.

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Section: Introductionmentioning

confidence: 99%

Influence of the P-delta Effect and Stiffness Irregularity on the Structural Behavior of Reinforced Concrete Buildings

Zavala

Torres

Moreno

2022

J. Phys.: Conf. Ser.

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“…The study of multi-degree-of-freedom systems is beyond the scope of this paper; however, it is important to note that due consideration of the influence of P − Δ effects in multi-storey structures is still a matter of debate. Recently, and by taking advantage of the period dependency of the pervasive stability coefficient , which is defined and discussed further in this paper, the concept of Stability Collapse Response Spectrum (SCRS) has been put forth and shown to be a useful approach to account for stability coefficient limits from the early stages of design (Mousavi and Sensoy 2019).…”

Section: Introductionmentioning

confidence: 99%

Seismic collapse capacity assessment of SDOF systems incorporating duration and instability effects

Bravo‐Haro

Liapopoulou

Elghazouli

2020

Bull Earthquake Eng

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This paper presents a detailed investigation into the seismic response of non-deteriorating and deteriorating single degree-of-freedom systems controlled by P − Δ effects, with due account for the influence of earthquake duration. In order to isolate the effect of duration from other ground motion characteristics, 77 pairs of records with equivalent spectral shapes are considered in the study. The structural characteristics examined include the structural period, applied gravity loading, post-yield stiffness, viscous damping, material hysteretic behaviour, as well as the level of cyclic deterioration within the pinching systems. Detailed incremental dynamic analyses are carried out, considering an intensity measure corresponding to the spectral acceleration at the structural period of vibration of the system. Based on the incremental dynamic analysis results, predictive relationships are proposed for determining the structural collapse capacity, accounting for the influence of key parameters including instability and duration effects. The median and dispersion of the collapse capacity distribution embedded in the predictive models are also presented. The effect of duration is shown to increase with longer structural periods and to decrease with higher P − Δ levels. The more rapid instigation of dynamic instability in relatively stiff systems is also shown to reduce their comparative sensitivity to variations in ground motion characteristics. Overall, it is indicated that disregarding the influence of duration could lead to over-estimations of up to 50% in the collapse capacity. The paper concludes with a discussion of other sources of structural damage that instigate collapse when using records with equivalent spectral shape but without especial consideration for duration effects.

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Study on potential toxic material base and mechanisms of hepatotoxicity induced by Dysosma versipellis based on toxicological evidence chain (TEC) concept

Liu

Zhang

et al. 2020

Ecotoxicology and Environmental Safety

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Direct estimation of the P-delta effect through the “stability-coefficient-response-spectra” by introducing the “first-storey-single-degree-of-freedom” system

Cited by 4 publications

References 27 publications

Influence of the P-delta Effect and Stiffness Irregularity on the Structural Behavior of Reinforced Concrete Buildings

Influence of the P-delta Effect and Stiffness Irregularity on the Structural Behavior of Reinforced Concrete Buildings

Seismic collapse capacity assessment of SDOF systems incorporating duration and instability effects

Study on potential toxic material base and mechanisms of hepatotoxicity induced by Dysosma versipellis based on toxicological evidence chain (TEC) concept

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