Effect of soil-structure interaction on inelastic displacement ratios of degrading structures

Hassani, Nemat; Bararnia, Majid; Amiri, Gholamreza Ghodrati

doi:10.1016/j.soildyn.2017.10.004

Cited by 35 publications

(11 citation statements)

References 23 publications

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“…Finally, they developed a novel performance-based design method for the site and interaction-dependent seismic design of flexible-base structures. Hassani et al [7] evaluated inelastic displacement ratios for degraded structures considering soil-structure interaction. They considered a wide variety of effective parameters of hysteresis models and soil-structure systems.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Soil around the Basement Walls on the Base Level of Braced Framed Tube System

Barkhordari

Tehranizadeh

2018

CivileJournal

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According to the 2800 standard, the Iranian code of practice for seismic-resistant design of buildings, the base level refers to the level at which it is assumed that the horizontal movement of the ground is transmitted to the structure. In cases that there are reinforced concrete walls being run by an integrative structure in the underground perimeter, and the surrounding ground is dense and compressed, the base level is considered on the top of the basement wall. In tall structures, due to strong forces and moments at the foot of the structure, examining the location of base level and its movement becomes specially important. The aim of this study was to investigate the impact of changing the properties of the soil around the underground perimeter walls on the base level, taking into account the effects of soil-structure interaction systems. In this regard, the soil-structure system was investigated in two-dimensional models and the location of the base level was identified using shear and drift changes. The results indicated that taking into account the level of the upper stories is possible through performing appropriate walls integrated with the structure even without Compacting the soil around the structure.

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Section: Introductionmentioning

confidence: 99%

The Effect of Soil around the Basement Walls on the Base Level of Braced Framed Tube System

Barkhordari

Tehranizadeh

2018

CivileJournal

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“…In 1960, Veletsos and Newmark (1960) studied and defined the inelastic displacement ratio spectra for the first time. Since then, scholars have performed plenty of statistical analysis on the inelastic displacement ratio spectra of different nonlinear structures through time-history analysis, and proposed different prediction formulas (e.g., Miranda 2001;Wen et al 2014;Hassani et al 2018;Bararnia et al 2018;Yaghmaei-Sabegh et al 2017;Konstandakopoulou et al 2020;Wu et al 2019). Currently, research on the inelastic ratio spectra mainly focuses on common elastic-plastic structures, and the constitutive models of these structures mainly include the bilinear model, elastic-plastic model, and degradation model.…”

Section: Introductionmentioning

confidence: 99%

Constant ductility inelastic displacement ratio spectra of shape memory alloy-friction self-centering structures based on a hybrid model

Zhang

Shen²,

Wang³

2022

Bull Earthquake Eng

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Previous researches on the constant ductility inelastic displacement ratio spectra (𝐶 μ ) of self-centering structures have been conducted based on the typical flag-shaped self-centering (FS) model. However, the arising shape-memory-alloy-friction self-centering structures (SMAFSs) own their specialized force-displacement relationship different from the typical FS model. In this research, a hybrid force-displacement model composed of the typical FS model and Coulomb friction model is employed and an efficient calculating procedure is proposed to statistically investigate the 𝐶 μ of SMAFSs. Comparison with the 𝐶 μ of the typical FS system with similar selfcentering capacity shows that the 𝐶 μ of the SMAFS is significantly different from that of the typical FS system, which explains the necessity of employing the hybrid model for SMAFSs and the effects of the friction. The effects of seismic parameters and structural parameters on the 𝐶 μ of SMAFSs are investigated. Furthermore, the formula for estimating the 𝐶 μ of SMAFSs is proposed through statistical regression. This proposed formula could estimate the 𝐶 μ of SMAFSs and describe the effects of structural parameters more accurately. The research could provide a basis of estimating the 𝐶 μ of SMAFSs to obtain reliable seismic design results of the structures.

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“…Impact stiffness and strength degradation characteristics of the superstructure on the IDRs of SSI systems were investigated by Hassani et al. [ 26 ] . For this purpose, four alternative hysteretic models (a) bilinear, (b) modified Clough, (c) stiffness degrading, and (d) strength–stiffness degrading were assumed for the SDOF superstructure and the SSI effects were accounted for by means of a cone model.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic estimation of inelastic displacement demands in soil–structure interaction systems on cohesive soils

Avcı

Yazgan

2021

Earthq Engng Struct Dyn

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Inelastic displacement ratios (IDRs) of nonlinear soil-structure interaction (SSI) systems located at sites with cohesive soils are investigated in this study. To capture the effects of inelastic cyclic behavior of the supporting soil, the Beam on Nonlinear Winkler Foundation (BNWF) model is used. The superstructure is modeled using an inelastic single-degree-of-freedom (SDOF) system model.Nonlinear SSI systems representing various combinations of unconfined compressive strengths and shear wave velocities are considered in the analysis. A set of strong ground motions recorded at sites with soft to stiff soils is used for considering the record-to-record variability of IDRs. It is observed that IDRs for nonlinear SSI systems are sensitive to the strength and the stiffness properties of both the soil and the structure. For the case of SSI systems on the top of cohesive soils, the compressive strength of the soil has a significant impact on the IDRs, which cannot be captured by considering only the shear wave velocity of the soil. Based on the results of nonlinear time-history analysis, a new equation is proposed for estimating the mean and the dispersion of IDRs of SSI systems depending on the characteristic properties of the supporting soil, dimensions of the foundation, and properties of the superstructure. A probabilistic framework is presented for the performance-based seismic design of SSI systems located at sites with cohesive soils.

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Effect of soil-structure interaction on inelastic displacement ratios of degrading structures

Cited by 35 publications

References 23 publications

The Effect of Soil around the Basement Walls on the Base Level of Braced Framed Tube System

The Effect of Soil around the Basement Walls on the Base Level of Braced Framed Tube System

Constant ductility inelastic displacement ratio spectra of shape memory alloy-friction self-centering structures based on a hybrid model

Probabilistic estimation of inelastic displacement demands in soil–structure interaction systems on cohesive soils

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