Seismic Behavior of Historical Inclined Minarets under Near and Far Fault Ground Motions

This paper investigates the consequences of well-known characteristics of near-fault ground motions on the seismic response of steel moment frames. Additionally, idealized pulses are utilized in a separate study to gain further insight into the effects of high-amplitude pulses on structural demands. Simple input pulses were also synthesized to simulate artificial fling-step effects in ground motions originally having forward directivity. Findings from the study reveal that median maximum demands and the dispersion in the peak values were higher for near-fault records than far-fault motions. The arrival of the velocity pulse in a near-fault record causes the structure to dissipate considerable input energy in relatively few plastic cycles, whereas cumulative effects from increased cyclic demands are more pronounced in far-fault records. For pulse-type input, the maximum demand is a function of the ratio of the pulse period to the fundamental period of the structure. Records with fling effects were found to excite systems primarily in their fundamental mode while waveforms with forward directivity in the absence of fling caused higher modes to be activated. It is concluded that the acceleration and velocity spectra, when examined collectively, can be utilized to reasonably assess the damage potential of near-fault records.

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Three-Dimensional Seismic Response Analysis of Buried Continuous or Jointed Pipelines

Journal of Pressure Vessel Technology ◽

10.1115/1.3264859 ◽

1987 ◽

Vol 109 (1) ◽

pp. 80-87 ◽

Cited By ~ 15

Author(s):

S. Takada ◽

K. Tanabe

Keyword(s):

Seismic Behavior ◽

Ground Motions ◽

Three Dimensional ◽

Response Analysis ◽

Ground Deformations ◽

Pipe Systems ◽

Experimental Values ◽

Earthquake Response Analysis ◽

Nonlinear Behaviors ◽

Torsional Properties

This paper presents a three-dimensional quasi-static analysis of continuous or jointed pipelines. Transfer Matrix Method was applied to the analysis providing for nonlinear behaviors of joints and soil frictions. An improved computer program ERAUL-II (Earthquake Response Analysis of Underground Lifelines-II) was developed for numerical computations. First, numerical response analyses were carried out for three-dimensional pipe systems with steel or cast iron pipe materials subject to large ground deformations or seismic ground motions. Analytical results show that torsional properties of pipes are also important factors for seismic behavior, which cannot be known by two-dimensional analyses. Second, experimental test data of three-dimensional steel pipe systems were simulated by using the ERAUL-II program. Simulated results agree well with the experimental values.

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Direct use of peak ground motion parameters for the estimation of inelastic displacement ratio of SDOF systems subjected to repeated far fault ground motions

Earthquake Engineering and Engineering Vibration ◽

10.1007/s11803-018-0475-4 ◽

2018 ◽

Vol 17 (4) ◽

pp. 771-785 ◽

Cited By ~ 4

Author(s):

Cengizhan Durucan ◽

Muhammed Gümüş

Keyword(s):

Ground Motion ◽

Ground Motions ◽

Ground Motion Parameters ◽

Inelastic Displacement ◽

Displacement Ratio ◽

Peak Ground Motion ◽

Motion Parameters ◽

Inelastic Displacement Ratio ◽

Far Fault ◽

Direct Use

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Investigation of the impact of excavation (reinforced) on the seismic behavior of adjacent steel structures under the influence of near-fault and far-fault earthquakes

Journal of Fundamental and Applied Sciences ◽

10.4314/jfas.v9i2s.869 ◽

2018 ◽

Vol 9 (2S) ◽

pp. 1683

Author(s):

A Fotovvat ◽

S Hashemi ◽

A.J. Mehrabadi

Keyword(s):

Seismic Behavior ◽

Steel Structures ◽

Near Fault ◽

Far Fault ◽

The Impact

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Spectrum characterization of two types of long-period ground motions and seismic behavior of frame-core wall structures under multidimensional earthquake records

The Structural Design of Tall and Special Buildings ◽

10.1002/tal.1539 ◽

2018 ◽

Vol 27 (16) ◽

pp. e1539

Author(s):

Yu Cheng ◽

Guoliang Bai ◽

Yaorong Dong

Keyword(s):

Seismic Behavior ◽

Ground Motions ◽

Long Period ◽

Earthquake Records ◽

Wall Structures

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Post-Earthquake Damage Assessments of Historic Mosques and Effects of Near-Fault and Far-Fault Ground Motions on Seismic Responses

International Journal of Architectural Heritage ◽

10.1080/15583058.2021.2011475 ◽

2021 ◽

pp. 1-36

Author(s):

Ahmet Can Altunişik ◽

Fezayil Sunca ◽

Ali Fuat Genç ◽

Cengiz Tavşan

Keyword(s):

Ground Motions ◽

Earthquake Damage ◽

Seismic Responses ◽

Near Fault ◽

Far Fault

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Effect of the Directional Components of Earthquakes on the Seismic Behavior of an Unanchored Steel Tank

Applied Sciences ◽

10.3390/app10165489 ◽

2020 ◽

Vol 10 (16) ◽

pp. 5489

Author(s):

Rulin Zhang ◽

Shili Chu ◽

Kailai Sun ◽

Zhongtao Zhang ◽

Huaifeng Wang

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Ground Motion ◽

Seismic Behavior ◽

Axial Stress ◽

Ground Motions ◽

Great Influence ◽

Liquid Sloshing ◽

Base Shear ◽

Element Method

This paper investigates the effect of the multi-directional components of ground motion on an unanchored steel storage tank. Both the liquid sloshing effect and contact behavior between the foundation and tank are included in the study. A three-dimensional model for a foundation–structure–liquid system is numerically simulated using the finite element method. The Lagrange fluid finite element method (FEM) in ANSYS is used to consider the liquid–solid interaction. In the liquid–structure–foundation interaction model, the contact and target elements are adapted to simulate the nonlinear uplift and slip effects between the tank and the foundation. Three earthquake ground motions are selected for evaluating the seismic behavior of the tank. Comparisons are made on the horizontal displacement, “elephant-foot” deformation, stress, base shear and moment, sloshing of the liquid, uplift, as well as slip behavior under the application of the unidirectional, bi-directional and tri-directional components. Under the selected ground motions, the horizontal bi-directional seismic component has great influence on the liquid sloshing in the tank studied in this paper. The vertical seismic component produces high compressive axial stress, and it also makes the uplift and slide of the tank bottom increase significantly. The applicability of this conclusion should be carefully considered when applied to other types of ground motion inputs.

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Prof. Comparing H2 and H∞ Algorithms for Optimum Design of Tuned Mass Dampers under Near-Fault and Far-Fault Earthquake Motions

Periodica Polytechnica Civil Engineering ◽

10.3311/ppci.16389 ◽

2020 ◽

Author(s):

Ali Kaveh ◽

Mazyar Fahimi Fazam ◽

Rasool Maroofiazar

Keyword(s):

Objective Function ◽

Optimum Design ◽

Ground Motions ◽

Optimization Technique ◽

Large Set ◽

Near Fault ◽

Colliding Bodies Optimization ◽

Controlled Structure ◽

Robust Optimum Design ◽

Far Fault

In this study, the robust optimum design of Tuned Mass Damper (TMD) is established. The H2 and H∞ norm of roof displacement transfer function are implemented and compared as the objective functions under Near-Fault (NF) and Far-Fault (FF) earthquake motions. Additionally, the consequences of different characteristics of NF ground motions such as forward-directivity and fling-step are investigated on the behavior of a benchmark 10-story controlled structure. The Colliding Bodies Optimization (CBO) is employed as an optimization technique to calculate the optimum parameters of the TMDs. The resulting statistical assessment shows that the H∞ objective function is rather superior to H2 objective function for optimum design of TMDs under NF and FF earthquake excitations. Finally, the robustness of the designed TMDs is evaluated under a large set of natural ground motions.

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