Energy distribution in RC shear wall-frame structures subject to repeated earthquakes

Hamidi, Hamed; Amiri, Javad Vaseghi; Rajabnejad, Hamid

doi:10.1016/j.soildyn.2018.01.010

Cited by 33 publications

(10 citation statements)

References 31 publications

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“…One of the most important properties, which is different in each station, is the strong *Corresponding Author Institutional Email: h.hamidi@nit.ac.ir (H. Hamidi) ground motion duration. Due to the possibility of occurring earthquakes with similar severity in the coming years, a precise and comprehensive study on such earthquakes and their effects on different areas seems to be valuable [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effect of intensity measures on the response of a 3D-structure under different ground motion duration

Rajabnejad

Hamidi

Naseri

et al. 2021

IJE

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Section: Introductionmentioning

confidence: 99%

Effect of intensity measures on the response of a 3D-structure under different ground motion duration

Rajabnejad

Hamidi

Naseri

et al. 2021

IJE

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“…The level of structural damage caused by earthquakes is closely related to the capacity of the structure in absorption and dissipation of energy. 9,10 Although different studies have been conducted to investigate forward-directivity (e.g., [11][12][13][14][15][16] ), a few studies can be found concerning the effect of fling-step on structural behavior (e.g., [17][18][19] ). The study carried out by Kalkan and Kunnath 18 on typical steel moment frames shows that when the fling-modified motions (incorporating artificial fling-step on near-fault ground motions) are applied to the frames, the demands in the upper stories are visibly reduced.…”

Section: Introductionmentioning

confidence: 99%

Seismic response of RC buildings subjected to fling‐step in the near‐fault region

Hamidi

Karbassi²,

Lestuzzi

2019

Structural Concrete

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Fling-step and forward directivity are the major consequences of near-fault ground motions as they can impose unexpected seismic demands on structures located in the vicinity of the fault. The pernicious effect of forward directivity on the seismic behavior of structures has been studied widely. However, not much research has been conducted to investigate the influence of fling-step that is related to a large co-seismic displacement. Moreover, the inconsistent results reported in the literature create a scientific challenge about the effect of fling-step on the seismic behavior of long-period structures. In this paper, the effect of fling-step is studied by comparing the displacement ductility demand in various single degree of freedom systems with different natural frequencies and strength reduction factors, subjected to long-period ground motions (generated and as-recorded) with and without fling-step. Subsequently, two 11and 20-story reinforced concrete buildings are considered and the effect of removing the fling-step on their maximum inter-story drifts is studied. The results indicate that the ratio of the fundamental period of the structure to the fling-pulse period plays an important role and the demands imposed on those systems without fling-step may increase or decrease based on the ground motions type and structural characteristics. Also, a similar trend in the displacement ductility demand was observed in this condition.

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“…The shear wall frame system is widely used in earthquake engineering and a considerable body of research focused on the seismic response of the system (Feng et al, 2018;Jamnani et al, 2018). Many simplified approaches are proposed to efficiently perform dynamic analysis of the system in recent years, with representative researches found in Park et al (2014) and Su et al (2016).…”

Section: Introductionmentioning

confidence: 99%

Efficient analysis of shear wall-frame structural systems

Xia

Shu

Stanciulescu

2019

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Purpose This paper aims to propose an efficient method to conduct the preliminary analyses of medium or high-rise wall-frame structural systems with vertically varying properties. To this end, a finite element is formulated to take the shear deformation of the shear wall and the constrained moment of the link beam. Design/methodology/approach The differential equation of the structure is derived from the total potential energy. Its homogenous solutions are functions of initial parameters (deflections and inner forces). To solve the structure with vertically non-uniform properties, the authors first use the classical Timoshenko beam element and then heuristically propose a finite element that uses the initial parameter solutions as shape functions and is easier to implement. A post-processing method to compute the shear force in the frame and shear wall is developed. Modal analysis using the consistent mass matrix is also incorporated. Numerical examples demonstrate the accuracy and mesh independency of the proposed element. Findings The shear deformation of the shear wall and the constrained moment of the link beam significantly influence the static response of the structure. Taking into account the shear deformation can eliminate the misleading result of zero-base shear force of the frame and give much better predictions of the system natural frequencies. Originality/value The proposed method achieves higher accuracy than the classical approach most often used. The finite element formulation derived from transformations of the initial parameter solutions is simple and has superior numerical performance. The post-processing method allows for a fast determination of the shear force distributions in the shear wall and frame.

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Energy distribution in RC shear wall-frame structures subject to repeated earthquakes

Cited by 33 publications

References 31 publications

Effect of intensity measures on the response of a 3D-structure under different ground motion duration

Effect of intensity measures on the response of a 3D-structure under different ground motion duration

Seismic response of RC buildings subjected to fling‐step in the near‐fault region

Efficient analysis of shear wall-frame structural systems

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