effect of slender RC columns under seismic load

Kwak, Hyo–Gyoung; Kim, Jin-Kook

doi:10.1016/j.engstruct.2007.02.008

Cited by 15 publications

(11 citation statements)

References 15 publications

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“…Only few works [19][20][21] analyzed the axial load effects on the seismic behavior of slender piers. These works were oriented to the numerical solution via finite element method, presented some specific case studies of slender piers, and mainly focused on the influence of axial load effects on the ultimate behavior and collapse mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Seismic response analysis of slender bridge piers

Tubaldi

Tassotti

Dall’Asta

et al. 2014

Earthq Engng Struct Dyn

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Many bridges are built on tall and slender piers, whose seismic response may be strongly influenced by second-order effects and higher modes contributions related to the distributed pier mass. In bridge design practice, the second-order effects are often taken into account by introducing amplification factors based on an oversimplified SDOF description of the pier behavior. In this paper, the influence of both axial load and higher-order modes on the dynamic behavior and seismic response of slender bridge piers is investigated by an analytical formulation and a continuous model that overcome some limitations of the models employed in previous studies. A dimensional analysis of the eigenvalue problem is carried out to make explicit the characteristic parameters governing the system dynamic behavior, and a parametric study is performed to study their influence on the modal properties. Further, a solving method is proposed for the seismic analysis and applied to a realistic bridge. The accuracy of the proposed model and of the kinematic assumptions, leading to a linear problem, is finally tested by comparison with the results obtained by a large displacement formulation. The case study results put in evidence some aspects characteristic of the dynamic behavior of slender piers that require further investigation. The proposed analytical formulation may be efficiently used to perform extensive parametric studies for different pier and seismic input properties. © 2014 John Wiley & Sons, Ltd

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Section: Introductionmentioning

confidence: 99%

Seismic response analysis of slender bridge piers

Tubaldi

Tassotti

Dall’Asta

et al. 2014

Earthq Engng Struct Dyn

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“…The correlation between the influence of axial force, P-Delta effect, and the effect of vertical earthquake have been assessed. The method was successfully verified [4]. indicated that the strength required to support influence of P-Delta is up to 50% of the basic design strength of the beams at lower third of the building.…”

Section: Introductionmentioning

confidence: 98%

“…Therefore, Non-linear Dynamic Analysis can be used to determine the contribution of P-Delta in the structural analysis. Kwak et al (2007) investigated the effect of P-Delta in slender reinforced concrete columns based on the principle of the layered section method. The correlation between the influence of axial force, P-Delta effect, and the effect of vertical earthquake have been assessed.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of p-delta effect in structural seismic response

Sardar

Hama

2018

MATEC Web Conf.

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Numerous recent studies have assessed the effect of P-Delta on the structures. This paper investigates the effect of P-Delta in seismic response of structures with different heights. For indicating the effect of P-Delta, nonlinear static analysis (pushover analysis) and nonlinear dynamic analysis (Time history analysis) were conducted by using finite element software. The results showing that the P-Delta has a significant impact on the structural behavior mainly on the peak amplitude of building when the height of the structures increased. In addition, comparison has been made between concrete and steel structure.

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“…that exhibit rocking behavior led to the coupling of flexural vibrations with rocking response, and therefore introduced the so-called flexural rocking models [18][19][20][21][22]. Nevertheless, the role of self-weight on the dynamic response of the different systems has not been thoroughly investigated until now, with the exception of the second-order (P − Δ) effects in flexible cantilever systems [23,24]. The objective of this study is to investigate the role of weight on the dynamic characteristics and on the response of the different fundamental structural dynamic systems pertaining to civil engineering structures; fundamental dynamic systems exhibiting chaotic behavior (such as the Duffing oscillator) that can be of interest from a mechanical engineering perspective are not included in this study.…”

Section: Introductionmentioning

confidence: 99%

Revisiting the fundamental structural dynamic systems: the effect of low gravity

2019

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This paper revisits the fundamental structural dynamic systems with regard to the effect of gravity, and thus self-weight, on their dynamic characteristics and response. Far from being a purely theoretical exercise, as would have been the case in the past, this study is a first step in structural dynamics inspired by-and anticipating-the potential of building under extraterrestrial conditions. More specifically, five basic structural models are considered: (a) the simple pendulum (SP), (b) the rigid inverted pendulum (RIP), (c) the flexural inverted pendulum (FIP), (d) the rigid rocking block (RRB), and (e) the flexural rocking block (FRB). The focus is to identify patterns and regions where low gravity can have a beneficial or detrimental role on the structural response. The paper initially presents the effect of low gravity on the dynamic characteristics of each system and then proceeds with highlighting their self-similar response, along with the differences in response due to low gravity. It is proved that low gravity is detrimental for the SP, while it is beneficial for the RIP and FIP models. Nevertheless, the effect can be both beneficial and detrimental for the RRB and FRB, depending on their parameters as revealed from this investigation. Finally, the main dynamic characteristics of the five cases studied, factorized by the gravitational multiplier (α), are quantified and summarized in the form of a representative table. KeywordsDynamic response • Simple pendulum (SP) • Rigid inverted pendulum (RIP) • Flexural inverted pendulum (FIP) • Rigid rocking block (RRB) • Flexural rocking block (FRB) • Gravitational multiplier (α)

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effect of slender RC columns under seismic load

Cited by 15 publications

References 15 publications

Seismic response analysis of slender bridge piers

Seismic response analysis of slender bridge piers

Evaluation of p-delta effect in structural seismic response

Revisiting the fundamental structural dynamic systems: the effect of low gravity

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