Evaluating Main Parameters Effects of Near-Field Earthquakes on the Behavior of Concrete Structures with Moment Frame System

Jouneghani, Kourosh Talebi; Hosseini, Mahmood; Rohanimanesh, Mohammad Sadegh; Dehkordi, Morteza Raissi

doi:10.12913/22998624/74135

Cited by 7 publications

(6 citation statements)

References 17 publications

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“…This study focuses on the evaluation of the nonlinear seismic behavior of flat-bottomed reinforced concrete cylindrical silos under near-fault ground motions (NFGM) and far-field ground motions (FFGM). Though there is no fixed distance for the designation of the near-fault earthquakes; a distance range of (15-50) km is widely adopted by researchers and international codes as a reasonable value [18]. Zhou et al [19] studied the impact of NFGM characteristics on the structural demand of structures through attention relationships for 34 near-fault records.…”

Section: Nomenclature Cmentioning

confidence: 99%

Seismic Analysis of Reinforced Concrete Silos under Far-Field and Near-Fault Earthquakes

Hussein¹,

Risan²

2022

Structural Durability &Amp; Health Monitoring

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Silos are strategical structures used to stockpile various types of granular materials. They are highly vulnerable to earthquake excitation and have been frequently reported to fail at a higher rate than any other industrial structure. The seismic response of silos within the near-fault region will suffer a complex combination of loadings due to the unique characteristics of the near-fault ground motions; which are usually associated with a large amplitude pulse at the beginning of either the velocity or the displacement time histories. This study aims to numerically evaluate the seismic response of reinforced concrete cylindrical silos under near-fault ground motions (NFGM) and farfield ground motions (FFGM). The assessment investigates the impact of the slenderness ratio and the parameters' influence on the seismic behavior of reinforced concrete silos. The validity of the Eurocode provisions in the structural safety of silos will also be inspected. The nonlinear time history analysis is carried out through the finite element approach by examining four silos with different slenderness ratios. The concrete damage plasticity model is assigned to the silo wall to simulate the nonlinear behavior of concrete in the plastic zone; while, the behavior of the stored material is represented by the Drucker-Prager plastic model. The wall-granular material interaction is considered and defined by coulomb's friction theory. The results of the near-fault records reveal a growth up to 72.8% in the hoop stress and 160.4% in the vertical stress compared to the far-field earthquakes. Consequently, the seismic response of reinforced concrete silos is highly sensitive to the type of ground motion, and slender silos tend to impose greater structural demand under the NFGM. Additionally, The Eurocode-8 seismic provisions were adequate in the conventional far-field ground motions and less effective in the near-fault zone.

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Section: Nomenclature Cmentioning

confidence: 99%

Seismic Analysis of Reinforced Concrete Silos under Far-Field and Near-Fault Earthquakes

Hussein¹,

Risan²

2022

Structural Durability &Amp; Health Monitoring

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“…As these earthquakes take place in the vicinity of an active fault, they have long-period pulse maps [2]. A thorough investigation of the main parameters of near-field earthquakes for concrete structures has been carried out by Talebi Jouneghani et al [3].…”

Section: Introductionmentioning

confidence: 99%

“…Comprehensive studies have been carried out to address the main concerns on seismic isolation within the last decades [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. These studies show an accurately designed seismic isolation system effectively diminishes floor accelerations and inter-story drift ratios to acceptable levels without triggering unsatisfactorily large base displacements in case of far-field earthquakes.…”

Section: Introductionmentioning

confidence: 99%

Reducing the lateral displacement of lead rubber bearing isolators under the near field earthquakes by crosswise dissipaters connected to rigid support structure

Jouneghani

2021

CEJ

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The purpose of base isolation is to absorb earthquake energy, prolong the life of the structure, and enable the structure to be similar to a rigid body. However, since resonance can occur due to the closeness of the period of structures to the long period and large velocity pulses of the near field earthquakes, the stability of these buildings greatly reduces, and with the large displacement above isolation level, sometimes, tendency of overturning is created in isolators leading to their destruction. The main objective of this study is to significantly reduce the lateral displacement of base isolation subjected to near field earthquakes. In this research, seismic response calculation has been carried out for five steel moment frame structure with the 3, 5, 8, 11, and 14 stories in two states of with and without stiff core structure and energy dissipaters. The analyses has been done under fourteen scaled records of seven near-source and seven far-source earthquakes. It has been shown that the lateral displacement of base isolation system can be reduced by 87% for low-rise buildings, and 77% for high-rise buildings.

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“…The study also emphasized that the ordinary response spectrum factor method is outdated. Kourosh Talebi Jouneghani et al [6] reviewed behaviour of a 2D model of a six-storey frame building under pulse-like motions. They indicated that the displacement due to NF excitation exceeded design requirements by 30 %.…”

Section: Introductionmentioning

confidence: 99%

Influence of near-fault characteristics on inelastic response of multi-storey building with intensity measurement analysis

2021

JCE

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This study is presented to achieve three objectives: (1) to compare between the inelastic responses of buildings under near and far fault excitations, (2) to investigate the effect of the pulse to structural period ratio, and (3) to evaluate a set of intensity measurements (IMs) in terms of near fault (NF) earthquakes. A real reinforced concrete building with 35 storeys is analysed in the scope of the first and second objectives, whereas the third objective involves three general-frame buildings consisting of 6, 13, and 20 storeys. Results show that the NF excitation can drive the building to exceed its life safety performance level. Furthermore, the accuracy of the IM highly depends on the vibration period of the building and the function used to calculate the IM.

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Evaluating Main Parameters Effects of Near-Field Earthquakes on the Behavior of Concrete Structures with Moment Frame System

Cited by 7 publications

References 17 publications

Seismic Analysis of Reinforced Concrete Silos under Far-Field and Near-Fault Earthquakes

Seismic Analysis of Reinforced Concrete Silos under Far-Field and Near-Fault Earthquakes

Reducing the lateral displacement of lead rubber bearing isolators under the near field earthquakes by crosswise dissipaters connected to rigid support structure

Influence of near-fault characteristics on inelastic response of multi-storey building with intensity measurement analysis

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