Nonstationary Kanai-Tajimi models for El Centro 1940 and Mexico City 1985 earthquakes

Fan, Fa‐Gung; Ahmadi, Goodarz

doi:10.1016/0266-8920(90)90018-f

Cited by 101 publications

(37 citation statements)

References 15 publications

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“…For the El-Centro 1940 earthquake ground motion, the value of the intensity parameter, S 0 suggested by Fan and Ahmadi [14] is equal to 1 cm 2 /s 3 . However, it will be interesting to study the variation of optimum m for dierent intensities of the earthquake ground motion (keeping the same frequency content of ground motion).…”

Section: Eects Of Intensity Of Excitation (S 0 )mentioning

confidence: 98%

“…To describe such ground motions, multi-variate random process model has been proposed. The generalised non-stationary Kanai± Tajimi model of El-Centro 1940 earthquake which was recently developed by Fan and Ahmadi [14] is considered for the present study. This model preserves the non-stationary evolution of amplitude and frequency content of the original records.…”

Section: Earthquake Ground Motionmentioning

confidence: 99%

“…where E is expectation operator; dÁ is the Dirac delta function; and S 0 is the constant power spectrum ordinate of white-noise process, f tX The parameters suggested for the El-Centro 1940 earthquake by Fan and Ahmadi [14] are…”

Section: Earthquake Ground Motionmentioning

confidence: 99%

See 2 more Smart Citations

Optimum frictional elements in sliding isolation systems

Jangid

2000

Computers & Structures

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Section: Eects Of Intensity Of Excitation (S 0 )mentioning

confidence: 98%

Section: Earthquake Ground Motionmentioning

confidence: 99%

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Optimum frictional elements in sliding isolation systems

Jangid

2000

Computers & Structures

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“…To describe such ground motions, a multivariate random process model has been proposed. The generalized non-stationary Kanai-Tajimi model of the El-Centro 1940 earthquake, which was developed by Fan and Ahmadi [13], is considered for the present study. This model preserves the non-stationary evolution of amplitude and frequency content of the original record.…”

Section: Model Of Earthquake Excitationmentioning

confidence: 99%

Stochastic seismic response of structures isolated by rolling rods

Jangid

2000

Engineering Structures

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“…Di erent ground motion generation models have di erent assumptions on stationarity or non-stationarity of the amplitude and frequency content. In this study Fan and Ahmadi [2] generalized nonstationary Kanai-Tajimi ÿlter is used, which provides a process nonstationary both in amplitude and frequency content. The interesting feature of this model is that the generated ground motions preserve the amplitude and frequency content evolution of the base ground motion.…”

Section: Introductionmentioning

confidence: 99%

Localization analysis in softening RC frame structures

Khaloo

Tariverdilo

2002

Earthq Engng Struct Dyn

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SUMMARYThis paper discusses the sensitivity of softening reinforced concrete frame structures to the changes in input ground motion and investigates the possibility of localizations for this type of structure in static and dynamic analysis. A ÿnite element model is used in which the sections resisting force are calculated using a proposed di erential hysteretic model. This model is especially developed for modelling softening behaviour under cyclic loading. To obtain parameters of the di erential model the moment-curvature of each section is evaluated using a microplane constitutive law for concrete and bi-linear elasto-plastic law for reinforcements. The capability of the procedure is veriÿed by comparing results with available experimental data at element level, which shows good accuracy of the procedure. The e ect of possible changes in ground motion is assessed using a non-stationary Kanai-Tajimi process. This process is used to generate ground motions with approximately the same amplitude and frequency content evolution as those of base ground motion. The possibility of localization in static and dynamic loading is investigated using two structures. A measure for the possibility of localization in code-designed structures is obtained. This study indicates that localization may occur in ordinary moment-resisting structures located in high seismic zones. Localization may result in substantial drift in global response and instability due to P-e ect. Also, it is shown that the structure becomes very sensitive to the input ground motion. It is concluded that allowance by some design codes of the use of ordinary moment-resisting frames in regions with high seismicity should be revised or improvements should be made in the detailing requirements at critical sections of these structures.

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Nonstationary Kanai-Tajimi models for El Centro 1940 and Mexico City 1985 earthquakes

Cited by 101 publications

References 15 publications

Optimum frictional elements in sliding isolation systems

Optimum frictional elements in sliding isolation systems

Stochastic seismic response of structures isolated by rolling rods

Localization analysis in softening RC frame structures

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