The Effect of the Mainshock–Aftershock on the Estimation of the Separation Gap of Regular and Irregular Adjacent Structures with the Soft Story

Khatami, Mostafa; Gerami, Mohsen; Kheyroddin, Ali; Siahpolo, Navid

doi:10.1142/s1793431120500086

Cited by 7 publications

(6 citation statements)

References 17 publications

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“…The damping coefficient can be related to the damping ratio (ζ) which is related to coefficient of restitution (e) that is expressed by Eqs. ( 8) and (9).…”

Section: Fig 3 Kelvin-voight Elementmentioning

confidence: 99%

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Estimating the seismic pounding force between adjacent buildings and study the effect of gap distance on seismic pounding

Kamel

2022

Asian J Civ Eng

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Insufficient separation distance between adjacent buildings may lead to their pounding during strong earthquakes causing damage or local failure. Accordingly, most of the design codes specify a minimum separation or gap distance between adjacent buildings to prevent their seismic pounding. Main objectives of this study are study the seismic pounding between adjacent reinforced concrete buildings under various ground motions and study the effect of gap distance on seismic pounding. The studied buildings are modeled as twodimensional frames to idealize the adjacent buildings. This study considers adjacent frame buildings having the same number of floors as well as frames having a different number of floors. Nonlinear finite element time history analysis is performed using ETABS commercial software. Three different real earthquake records with different characteristics are scaled and used to simulate ground motion. Nonlinear gap element is used to model pounding between buildings at their interface points. The results of the study indicate that, the maximum pounding force was investigated for each of the studied cases. Pounding does not occur between buildings having equal height. Increasing separation distance between buildings reduces the pounding force between them. Separation distance which estimated by the Egyptian code is conservative.

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“…The damping coefficient can be related to the damping ratio (ζ) which is related to coefficient of restitution (e) that is expressed by Eqs. ( 8) and (9).…”

Section: Fig 3 Kelvin-voight Elementmentioning

confidence: 99%

“…This pounding may cause local damage, significant damage or even total collapse of the adjacent buildings depending on the earthquake strength such as buildings in Christchurch CBD as shown in Fig. 1 (Khatami et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Estimating the seismic pounding force between adjacent buildings and study the effect of gap distance on seismic pounding

Kamel

2022

Asian J Civ Eng

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“…The manifold parameters involved result in multidirectional studies. Some of these studies were detected to quantify the safe separation distance between adjacent buildings, (e.g., see [44][45][46][47][48] among others). Other studies were conducted to investigate the effect of the dynamic characteristics of the involved structures either using a deterministic approach (e.g., [8,49] among many others) or using a probabilistic approach [6,50].…”

Section: Numerical Studies In Structure-levelmentioning

confidence: 99%

Seismic Pounding Between Adjacent Buildings: A Review

Mohamed¹

2021

Academic Platform Journal of Natural Hazards and Disaster Management

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The collision between adjacent buildings with an insufficient seismic separation distance has been reported after earthquakes. This collision between adjacent buildings, commonly referred to as earthquake-induced pounding, entails huge damages to the involved buildings. The main cause of damage was interpreted to the developed impact forces between colliding buildings. The intensity of the impact force relies on many factors, therefore, a significant research effort was found to address this issue from different perspectives. This paper presents a summary of the main research conducted in the context of structural pounding namely, field observations, experimental and numerical studies. The main recommendations and results of each category have been highlighted and insights for future research are provided.

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“…Pounding, which could occur due to an insufficient seismic gap, is an issue that needs to be examined in terms of structural dynamics and earthquake engineering. For this purpose, there are several numerical but limited experimental studies in the literature on subjects such as the pounding force between two adjacent structures, the number of pounding, the moment of collision, and the determination and investigation of the size of the seismic gap [3][4][5][6][7][8]10].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Pounding between Two Adjacent Building Models with Experimental Methods

Şekerci

Damcı

2023

Turkish Journal of Civil Engineering

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This study investigates the pounding phenomenon by shaking table experiments on two scaled building models. Representing the situation where the seismic gap is insufficient, two building models are adjacently positioned on the shaking table, and pounding was investigated for harmonic and strong ground motion excitations. Displacement and acceleration responses were obtained to observe the pounding effect experimentally from video and accelerometer recordings, respectively. The Kelvin-Voigt Model consisting of spring and damper was used for numerical pounding analysis. The most critical parameters of the Kelvin–Voigt model, which are the spring stiffness (ks) and the damping, are calculated according to the coefficient of restitution (r) and were investigated and compared with harmonic experimental results. The obtained parameters, compatible with the harmonic experiments, were used to examine structural behavior under earthquake effect for the case where the building models are positioned for an insufficient seismic gap. For comparison, numerous numerical simulations were realized using different spring stiffnesses and coefficients of restitution. The study shows that when the coefficient of restitution is taken as 0.2 or 0.4, and the ratio of spring stiffness to shear stiffness (ks/k) is 1 or 5, reasonable results in numerical earthquake simulations can be obtained.

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The Effect of the Mainshock–Aftershock on the Estimation of the Separation Gap of Regular and Irregular Adjacent Structures with the Soft Story

Cited by 7 publications

References 17 publications

Estimating the seismic pounding force between adjacent buildings and study the effect of gap distance on seismic pounding

Estimating the seismic pounding force between adjacent buildings and study the effect of gap distance on seismic pounding

Seismic Pounding Between Adjacent Buildings: A Review

Investigation of Pounding between Two Adjacent Building Models with Experimental Methods

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